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d="M12 1C5.9225 1 1 5.9225 1 12C1 16.8675 4.14875 20.9787 8.52125 22.4362C9.07125 22.5325 9.2775 22.2025 9.2775 21.9137C9.2775 21.6525 9.26375 20.7862 9.26375 19.865C6.5 20.3737 5.785 19.1912 5.565 18.5725C5.44125 18.2562 4.905 17.28 4.4375 17.0187C4.0525 16.8125 3.5025 16.3037 4.42375 16.29C5.29 16.2762 5.90875 17.0875 6.115 17.4175C7.105 19.0812 8.68625 18.6137 9.31875 18.325C9.415 17.61 9.70375 17.1287 10.02 16.8537C7.5725 16.5787 5.015 15.63 5.015 11.4225C5.015 10.2262 5.44125 9.23625 6.1425 8.46625C6.0325 8.19125 5.6475 7.06375 6.2525 5.55125C6.2525 5.55125 7.17375 5.2625 9.2775 6.67875C10.1575 6.43125 11.0925 6.3075 12.0275 6.3075C12.9625 6.3075 13.8975 6.43125 14.7775 6.67875C16.8813 5.24875 17.8025 5.55125 17.8025 5.55125C18.4075 7.06375 18.0225 8.19125 17.9125 8.46625C18.6138 9.23625 19.04 10.2125 19.04 11.4225C19.04 15.6437 16.4688 16.5787 14.0213 16.8537C14.42 17.1975 14.7638 17.8575 14.7638 18.8887C14.7638 20.36 14.75 21.5425 14.75 21.9137C14.75 22.2025 14.9563 22.5462 15.5063 22.4362C19.8513 20.9787 23 16.8537 23 12C23 5.9225 18.0775 1 12 1Z"></path> </svg> </a> <div class="flex-1 flex-order-2 text-right"> <a href="/login?return_to=https%3A%2F%2Fgithub.com%2Fonflow%2Fsc-eng-gaming" class="HeaderMenu-link HeaderMenu-button d-inline-flex d-lg-none flex-order-1 f5 no-underline border color-border-default rounded-2 px-2 py-1 color-fg-inherit js-prevent-focus-on-mobile-nav" data-hydro-click="{"event_type":"authentication.click","payload":{"location_in_page":"site header menu","repository_id":null,"auth_type":"SIGN_UP","originating_url":"https://github.com/onflow/sc-eng-gaming","user_id":null}}" data-hydro-click-hmac="f1ee18c5574038911ec6884d0e2737ac088e0a3ed41c30de4c971dba589fc7b8" data-analytics-event="{"category":"Marketing nav","action":"click to Sign in","label":"ref_page:Marketing;ref_cta:Sign in;ref_loc:Header"}" > Sign in </a> </div> </div> <div class="HeaderMenu js-header-menu height-fit position-lg-relative d-lg-flex flex-column flex-auto top-0"> <div class="HeaderMenu-wrapper d-flex flex-column flex-self-start flex-lg-row flex-auto rounded rounded-lg-0"> <nav class="HeaderMenu-nav" aria-label="Global"> <ul class="d-lg-flex list-style-none"> <li class="HeaderMenu-item position-relative flex-wrap flex-justify-between flex-items-center d-block d-lg-flex flex-lg-nowrap flex-lg-items-center js-details-container js-header-menu-item"> <button type="button" class="HeaderMenu-link border-0 width-full width-lg-auto px-0 px-lg-2 py-lg-2 no-wrap d-flex flex-items-center flex-justify-between js-details-target" aria-expanded="false"> Product <svg opacity="0.5" aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-chevron-down HeaderMenu-icon ml-1"> <path d="M12.78 5.22a.749.749 0 0 1 0 1.06l-4.25 4.25a.749.749 0 0 1-1.06 0L3.22 6.28a.749.749 0 1 1 1.06-1.06L8 8.939l3.72-3.719a.749.749 0 0 1 1.06 0Z"></path> </svg> </button> <div class="HeaderMenu-dropdown dropdown-menu rounded m-0 p-0 pt-2 pt-lg-4 position-relative position-lg-absolute left-0 left-lg-n3 pb-2 pb-lg-4 d-lg-flex flex-wrap dropdown-menu-wide"> <div class="HeaderMenu-column px-lg-4 border-lg-right mb-4 mb-lg-0 pr-lg-7"> <div class="border-bottom pb-3 pb-lg-0 border-lg-bottom-0"> <ul class="list-style-none f5" > <li> <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary d-flex flex-items-center Link--has-description pb-lg-3" data-analytics-event="{"location":"navbar","action":"github_copilot","context":"product","tag":"link","label":"github_copilot_link_product_navbar"}" href="https://github.com/features/copilot"> <svg aria-hidden="true" height="24" viewBox="0 0 24 24" version="1.1" width="24" data-view-component="true" class="octicon octicon-copilot color-fg-subtle mr-3"> <path d="M23.922 16.992c-.861 1.495-5.859 5.023-11.922 5.023-6.063 0-11.061-3.528-11.922-5.023A.641.641 0 0 1 0 16.736v-2.869a.841.841 0 0 1 .053-.22c.372-.935 1.347-2.292 2.605-2.656.167-.429.414-1.055.644-1.517a10.195 10.195 0 0 1-.052-1.086c0-1.331.282-2.499 1.132-3.368.397-.406.89-.717 1.474-.952 1.399-1.136 3.392-2.093 6.122-2.093 2.731 0 4.767.957 6.166 2.093.584.235 1.077.546 1.474.952.85.869 1.132 2.037 1.132 3.368 0 .368-.014.733-.052 1.086.23.462.477 1.088.644 1.517 1.258.364 2.233 1.721 2.605 2.656a.832.832 0 0 1 .053.22v2.869a.641.641 0 0 1-.078.256ZM12.172 11h-.344a4.323 4.323 0 0 1-.355.508C10.703 12.455 9.555 13 7.965 13c-1.725 0-2.989-.359-3.782-1.259a2.005 2.005 0 0 1-.085-.104L4 11.741v6.585c1.435.779 4.514 2.179 8 2.179 3.486 0 6.565-1.4 8-2.179v-6.585l-.098-.104s-.033.045-.085.104c-.793.9-2.057 1.259-3.782 1.259-1.59 0-2.738-.545-3.508-1.492a4.323 4.323 0 0 1-.355-.508h-.016.016Zm.641-2.935c.136 1.057.403 1.913.878 2.497.442.544 1.134.938 2.344.938 1.573 0 2.292-.337 2.657-.751.384-.435.558-1.15.558-2.361 0-1.14-.243-1.847-.705-2.319-.477-.488-1.319-.862-2.824-1.025-1.487-.161-2.192.138-2.533.529-.269.307-.437.808-.438 1.578v.021c0 .265.021.562.063.893Zm-1.626 0c.042-.331.063-.628.063-.894v-.02c-.001-.77-.169-1.271-.438-1.578-.341-.391-1.046-.69-2.533-.529-1.505.163-2.347.537-2.824 1.025-.462.472-.705 1.179-.705 2.319 0 1.211.175 1.926.558 2.361.365.414 1.084.751 2.657.751 1.21 0 1.902-.394 2.344-.938.475-.584.742-1.44.878-2.497Z"></path><path d="M14.5 14.25a1 1 0 0 1 1 1v2a1 1 0 0 1-2 0v-2a1 1 0 0 1 1-1Zm-5 0a1 1 0 0 1 1 1v2a1 1 0 0 1-2 0v-2a1 1 0 0 1 1-1Z"></path> </svg> <div> <div class="color-fg-default h4">GitHub Copilot</div> Write better code with AI </div> </a></li> <li> <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary d-flex flex-items-center Link--has-description pb-lg-3" data-analytics-event="{"location":"navbar","action":"security","context":"product","tag":"link","label":"security_link_product_navbar"}" href="https://github.com/features/security"> <svg aria-hidden="true" height="24" viewBox="0 0 24 24" version="1.1" width="24" data-view-component="true" class="octicon octicon-shield-check color-fg-subtle mr-3"> <path d="M16.53 9.78a.75.75 0 0 0-1.06-1.06L11 13.19l-1.97-1.97a.75.75 0 0 0-1.06 1.06l2.5 2.5a.75.75 0 0 0 1.06 0l5-5Z"></path><path d="m12.54.637 8.25 2.675A1.75 1.75 0 0 1 22 4.976V10c0 6.19-3.771 10.704-9.401 12.83a1.704 1.704 0 0 1-1.198 0C5.77 20.705 2 16.19 2 10V4.976c0-.758.489-1.43 1.21-1.664L11.46.637a1.748 1.748 0 0 1 1.08 0Zm-.617 1.426-8.25 2.676a.249.249 0 0 0-.173.237V10c0 5.46 3.28 9.483 8.43 11.426a.199.199 0 0 0 .14 0C17.22 19.483 20.5 15.461 20.5 10V4.976a.25.25 0 0 0-.173-.237l-8.25-2.676a.253.253 0 0 0-.154 0Z"></path> </svg> <div> <div class="color-fg-default h4">Security</div> Find and fix vulnerabilities </div> </a></li> <li> <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary d-flex flex-items-center Link--has-description pb-lg-3" data-analytics-event="{"location":"navbar","action":"actions","context":"product","tag":"link","label":"actions_link_product_navbar"}" href="https://github.com/features/actions"> <svg aria-hidden="true" height="24" viewBox="0 0 24 24" version="1.1" width="24" data-view-component="true" class="octicon octicon-workflow color-fg-subtle mr-3"> <path d="M1 3a2 2 0 0 1 2-2h6.5a2 2 0 0 1 2 2v6.5a2 2 0 0 1-2 2H7v4.063C7 16.355 7.644 17 8.438 17H12.5v-2.5a2 2 0 0 1 2-2H21a2 2 0 0 1 2 2V21a2 2 0 0 1-2 2h-6.5a2 2 0 0 1-2-2v-2.5H8.437A2.939 2.939 0 0 1 5.5 15.562V11.5H3a2 2 0 0 1-2-2Zm2-.5a.5.5 0 0 0-.5.5v6.5a.5.5 0 0 0 .5.5h6.5a.5.5 0 0 0 .5-.5V3a.5.5 0 0 0-.5-.5ZM14.5 14a.5.5 0 0 0-.5.5V21a.5.5 0 0 0 .5.5H21a.5.5 0 0 0 .5-.5v-6.5a.5.5 0 0 0-.5-.5Z"></path> </svg> <div> <div class="color-fg-default h4">Actions</div> Automate any workflow </div> </a></li> <li> <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary d-flex flex-items-center Link--has-description pb-lg-3" data-analytics-event="{"location":"navbar","action":"codespaces","context":"product","tag":"link","label":"codespaces_link_product_navbar"}" href="https://github.com/features/codespaces"> <svg aria-hidden="true" height="24" viewBox="0 0 24 24" version="1.1" width="24" data-view-component="true" class="octicon octicon-codespaces color-fg-subtle mr-3"> <path d="M3.5 3.75C3.5 2.784 4.284 2 5.25 2h13.5c.966 0 1.75.784 1.75 1.75v7.5A1.75 1.75 0 0 1 18.75 13H5.25a1.75 1.75 0 0 1-1.75-1.75Zm-2 12c0-.966.784-1.75 1.75-1.75h17.5c.966 0 1.75.784 1.75 1.75v4a1.75 1.75 0 0 1-1.75 1.75H3.25a1.75 1.75 0 0 1-1.75-1.75ZM5.25 3.5a.25.25 0 0 0-.25.25v7.5c0 .138.112.25.25.25h13.5a.25.25 0 0 0 .25-.25v-7.5a.25.25 0 0 0-.25-.25Zm-2 12a.25.25 0 0 0-.25.25v4c0 .138.112.25.25.25h17.5a.25.25 0 0 0 .25-.25v-4a.25.25 0 0 0-.25-.25Z"></path><path d="M10 17.75a.75.75 0 0 1 .75-.75h6.5a.75.75 0 0 1 0 1.5h-6.5a.75.75 0 0 1-.75-.75Zm-4 0a.75.75 0 0 1 .75-.75h.5a.75.75 0 0 1 0 1.5h-.5a.75.75 0 0 1-.75-.75Z"></path> </svg> <div> <div class="color-fg-default h4">Codespaces</div> Instant dev environments </div> </a></li> <li> <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary d-flex flex-items-center Link--has-description pb-lg-3" data-analytics-event="{"location":"navbar","action":"issues","context":"product","tag":"link","label":"issues_link_product_navbar"}" href="https://github.com/features/issues"> <svg aria-hidden="true" height="24" viewBox="0 0 24 24" version="1.1" width="24" data-view-component="true" class="octicon octicon-issue-opened color-fg-subtle mr-3"> <path d="M12 1c6.075 0 11 4.925 11 11s-4.925 11-11 11S1 18.075 1 12 5.925 1 12 1ZM2.5 12a9.5 9.5 0 0 0 9.5 9.5 9.5 9.5 0 0 0 9.5-9.5A9.5 9.5 0 0 0 12 2.5 9.5 9.5 0 0 0 2.5 12Zm9.5 2a2 2 0 1 1-.001-3.999A2 2 0 0 1 12 14Z"></path> </svg> <div> <div class="color-fg-default h4">Issues</div> Plan and track work </div> </a></li> <li> <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary d-flex flex-items-center Link--has-description pb-lg-3" data-analytics-event="{"location":"navbar","action":"code_review","context":"product","tag":"link","label":"code_review_link_product_navbar"}" href="https://github.com/features/code-review"> <svg aria-hidden="true" height="24" viewBox="0 0 24 24" version="1.1" width="24" data-view-component="true" class="octicon octicon-code-review color-fg-subtle mr-3"> <path d="M10.3 6.74a.75.75 0 0 1-.04 1.06l-2.908 2.7 2.908 2.7a.75.75 0 1 1-1.02 1.1l-3.5-3.25a.75.75 0 0 1 0-1.1l3.5-3.25a.75.75 0 0 1 1.06.04Zm3.44 1.06a.75.75 0 1 1 1.02-1.1l3.5 3.25a.75.75 0 0 1 0 1.1l-3.5 3.25a.75.75 0 1 1-1.02-1.1l2.908-2.7-2.908-2.7Z"></path><path d="M1.5 4.25c0-.966.784-1.75 1.75-1.75h17.5c.966 0 1.75.784 1.75 1.75v12.5a1.75 1.75 0 0 1-1.75 1.75h-9.69l-3.573 3.573A1.458 1.458 0 0 1 5 21.043V18.5H3.25a1.75 1.75 0 0 1-1.75-1.75ZM3.25 4a.25.25 0 0 0-.25.25v12.5c0 .138.112.25.25.25h2.5a.75.75 0 0 1 .75.75v3.19l3.72-3.72a.749.749 0 0 1 .53-.22h10a.25.25 0 0 0 .25-.25V4.25a.25.25 0 0 0-.25-.25Z"></path> </svg> <div> <div class="color-fg-default h4">Code Review</div> Manage code changes </div> </a></li> <li> <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary d-flex flex-items-center Link--has-description pb-lg-3" data-analytics-event="{"location":"navbar","action":"discussions","context":"product","tag":"link","label":"discussions_link_product_navbar"}" href="https://github.com/features/discussions"> <svg aria-hidden="true" height="24" viewBox="0 0 24 24" version="1.1" width="24" data-view-component="true" class="octicon octicon-comment-discussion color-fg-subtle mr-3"> <path d="M1.75 1h12.5c.966 0 1.75.784 1.75 1.75v9.5A1.75 1.75 0 0 1 14.25 14H8.061l-2.574 2.573A1.458 1.458 0 0 1 3 15.543V14H1.75A1.75 1.75 0 0 1 0 12.25v-9.5C0 1.784.784 1 1.75 1ZM1.5 2.75v9.5c0 .138.112.25.25.25h2a.75.75 0 0 1 .75.75v2.19l2.72-2.72a.749.749 0 0 1 .53-.22h6.5a.25.25 0 0 0 .25-.25v-9.5a.25.25 0 0 0-.25-.25H1.75a.25.25 0 0 0-.25.25Z"></path><path d="M22.5 8.75a.25.25 0 0 0-.25-.25h-3.5a.75.75 0 0 1 0-1.5h3.5c.966 0 1.75.784 1.75 1.75v9.5A1.75 1.75 0 0 1 22.25 20H21v1.543a1.457 1.457 0 0 1-2.487 1.03L15.939 20H10.75A1.75 1.75 0 0 1 9 18.25v-1.465a.75.75 0 0 1 1.5 0v1.465c0 .138.112.25.25.25h5.5a.75.75 0 0 1 .53.22l2.72 2.72v-2.19a.75.75 0 0 1 .75-.75h2a.25.25 0 0 0 .25-.25v-9.5Z"></path> </svg> <div> <div class="color-fg-default h4">Discussions</div> Collaborate outside of code </div> </a></li> <li> <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary d-flex flex-items-center Link--has-description" data-analytics-event="{"location":"navbar","action":"code_search","context":"product","tag":"link","label":"code_search_link_product_navbar"}" href="https://github.com/features/code-search"> <svg aria-hidden="true" height="24" viewBox="0 0 24 24" version="1.1" width="24" data-view-component="true" class="octicon octicon-code-square color-fg-subtle mr-3"> <path d="M10.3 8.24a.75.75 0 0 1-.04 1.06L7.352 12l2.908 2.7a.75.75 0 1 1-1.02 1.1l-3.5-3.25a.75.75 0 0 1 0-1.1l3.5-3.25a.75.75 0 0 1 1.06.04Zm3.44 1.06a.75.75 0 1 1 1.02-1.1l3.5 3.25a.75.75 0 0 1 0 1.1l-3.5 3.25a.75.75 0 1 1-1.02-1.1l2.908-2.7-2.908-2.7Z"></path><path d="M2 3.75C2 2.784 2.784 2 3.75 2h16.5c.966 0 1.75.784 1.75 1.75v16.5A1.75 1.75 0 0 1 20.25 22H3.75A1.75 1.75 0 0 1 2 20.25Zm1.75-.25a.25.25 0 0 0-.25.25v16.5c0 .138.112.25.25.25h16.5a.25.25 0 0 0 .25-.25V3.75a.25.25 0 0 0-.25-.25Z"></path> </svg> <div> <div class="color-fg-default h4">Code Search</div> Find more, search less </div> </a></li> </ul> </div> </div> <div class="HeaderMenu-column px-lg-4"> <div class="border-bottom pb-3 pb-lg-0 border-lg-bottom-0 border-bottom-0"> <span class="d-block h4 color-fg-default my-1" id="product-explore-heading">Explore</span> <ul class="list-style-none f5" 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0v3.5A1.75 1.75 0 0 1 12.25 14h-8.5A1.75 1.75 0 0 1 2 12.25v-8.5C2 2.784 2.784 2 3.75 2Zm6.854-1h4.146a.25.25 0 0 1 .25.25v4.146a.25.25 0 0 1-.427.177L13.03 4.03 9.28 7.78a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042l3.75-3.75-1.543-1.543A.25.25 0 0 1 10.604 1Z"></path> </svg> </a></li> <li> <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary Link--external" target="_blank" data-analytics-event="{"location":"navbar","action":"github_skills","context":"product","tag":"link","label":"github_skills_link_product_navbar"}" href="https://skills.github.com"> GitHub Skills <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-link-external HeaderMenu-external-icon color-fg-subtle"> <path d="M3.75 2h3.5a.75.75 0 0 1 0 1.5h-3.5a.25.25 0 0 0-.25.25v8.5c0 .138.112.25.25.25h8.5a.25.25 0 0 0 .25-.25v-3.5a.75.75 0 0 1 1.5 0v3.5A1.75 1.75 0 0 1 12.25 14h-8.5A1.75 1.75 0 0 1 2 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name="include_email" id="include_email" aria-label="Include my email address so I can be contacted" class="form-control mr-2" type="checkbox"> <label for="include_email" style="font-weight: normal">Include my email address so I can be contacted</label> </form></div> </scrollable-region> <div data-view-component="true" class="Overlay-footer Overlay-footer--alignEnd"> <button data-close-dialog-id="feedback-dialog" type="button" data-view-component="true" class="btn"> Cancel </button> <button form="code-search-feedback-form" data-action="click:qbsearch-input#submitFeedback" type="submit" data-view-component="true" class="btn-primary btn"> Submit feedback </button> </div> </dialog></dialog-helper> <custom-scopes data-target="qbsearch-input.customScopesManager"> <dialog-helper> <dialog data-target="custom-scopes.customScopesModalDialog" data-action="close:qbsearch-input#handleDialogClose cancel:qbsearch-input#handleDialogClose" id="custom-scopes-dialog" aria-modal="true" 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data-target="react-partial.embeddedData">{"props":{"initialPayload":{"allShortcutsEnabled":false,"path":"/","repo":{"id":531914746,"defaultBranch":"main","name":"sc-eng-gaming","ownerLogin":"onflow","currentUserCanPush":false,"isFork":false,"isEmpty":false,"createdAt":"2022-09-02T12:22:26.000Z","ownerAvatar":"https://avatars.githubusercontent.com/u/62387156?v=4","public":true,"private":false,"isOrgOwned":true},"currentUser":null,"refInfo":{"name":"main","listCacheKey":"v0:1693006615.0","canEdit":false,"refType":"branch","currentOid":"df9394db78670446868d8f326b2d6a22d0d78dc1"},"tree":{"items":[{"name":".github","path":".github","contentType":"directory"},{"name":"contracts","path":"contracts","contentType":"directory"},{"name":"images","path":"images","contentType":"directory"},{"name":"scripts","path":"scripts","contentType":"directory"},{"name":"test","path":"test","contentType":"directory"},{"name":"transactions","path":"transactions","contentType":"directory"},{"name":".env.example","path":".env.example","contentType":"file"},{"name":".gitignore","path":".gitignore","contentType":"file"},{"name":"CODE_OF_CONDUCT.md","path":"CODE_OF_CONDUCT.md","contentType":"file"},{"name":"CONTRIBUTING.md","path":"CONTRIBUTING.md","contentType":"file"},{"name":"LICENSE","path":"LICENSE","contentType":"file"},{"name":"Makefile","path":"Makefile","contentType":"file"},{"name":"README.md","path":"README.md","contentType":"file"},{"name":"SECURITY.md","path":"SECURITY.md","contentType":"file"},{"name":"flow.json","path":"flow.json","contentType":"file"},{"name":"setup.sh","path":"setup.sh","contentType":"file"}],"templateDirectorySuggestionUrl":null,"readme":null,"totalCount":16,"showBranchInfobar":false},"fileTree":null,"fileTreeProcessingTime":null,"foldersToFetch":[],"treeExpanded":false,"symbolsExpanded":false,"isOverview":true,"overview":{"banners":{"shouldRecommendReadme":false,"isPersonalRepo":false,"showUseActionBanner":false,"actionSlug":null,"actionId":null,"showProtectBranchBanner":false,"publishBannersInfo":{"dismissActionNoticePath":"/settings/dismiss-notice/publish_action_from_repo","releasePath":"/onflow/sc-eng-gaming/releases/new?marketplace=true","showPublishActionBanner":false},"interactionLimitBanner":null,"showInvitationBanner":false,"inviterName":null,"actionsMigrationBannerInfo":{"releaseTags":[],"showImmutableActionsMigrationBanner":false,"initialMigrationStatus":null}},"codeButton":{"contactPath":"/contact","isEnterprise":false,"local":{"protocolInfo":{"httpAvailable":true,"sshAvailable":null,"httpUrl":"https://github.com/onflow/sc-eng-gaming.git","showCloneWarning":null,"sshUrl":null,"sshCertificatesRequired":null,"sshCertificatesAvailable":null,"ghCliUrl":"gh 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Paper Scissors Onchain | (🪨 📃 ✂️) - ⛓️\u003c/h1\u003e\u003ca id=\"user-content-rock-paper-scissors-onchain----️---️\" class=\"anchor\" aria-label=\"Permalink: Rock Paper Scissors Onchain | (🪨 📃 ✂️) - ⛓️\" href=\"#rock-paper-scissors-onchain----️---️\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eThis repo originated as an proof of concept onchain Rock Paper Scissors game as an exploration in blockchain gaming powered by \u003ca href=\"https://developers.flow.com/cadence/intro\" rel=\"nofollow\"\u003eCadence\u003c/a\u003e on \u003ca href=\"https://flow.com/\" rel=\"nofollow\"\u003eFlow\u003c/a\u003e. Through that process, the UX hurdles faced by all onchain games - wallet onboarding, in-game transaction signing, etc. - revealed there was no way to create a meaningfully onchain game that was also user-friendly and permissionlessly composable. Consequently, this repo served as a sandbox to prototype \u003ca href=\"https://flow.com/hybrid-custody\" rel=\"nofollow\"\u003eHybrid Custody\u003c/a\u003e and make \u003ca href=\"https://developers.flow.com/concepts/account-linking\" rel=\"nofollow\"\u003eaccount linking\u003c/a\u003e a reality.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eThe contents in this repo are the onchain components powering the \u003ca href=\"https://walletless-arcade-game.vercel.app/\" rel=\"nofollow\"\u003eWalletless Arcade\u003c/a\u003e.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eIn addition to onchain gaming, you'll find a number of novel Cadence implemenations including:\u003c/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e🔗 Linked accounts\u003c/li\u003e\n\u003cli\u003e📲 Walletless onboarding\u003c/li\u003e\n\u003cli\u003e🏆 Dynamic NFTs\u003c/li\u003e\n\u003c/ul\u003e\n\u003cdetails\u003e\n\u003csummary\u003eTable of Contents\u003c/summary\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\u003ca href=\"#overview\"\u003eOverview\u003c/a\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\u003ca href=\"#gameplay-overview\"\u003eGameplay Overview\u003c/a\u003e\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"#components\"\u003eComponents\u003c/a\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\u003ca href=\"#summary\"\u003eSummary\u003c/a\u003e\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"#gaming\"\u003eGaming\u003c/a\u003e\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"#linked-accounts\"\u003eLinked Accounts\u003c/a\u003e\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"#supporting\"\u003eSupporting\u003c/a\u003e\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"#composition\"\u003eComposition\u003c/a\u003e\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"#user-walkthrough\"\u003eUser Walkthrough\u003c/a\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\u003ca href=\"#onboarding\"\u003eOnboarding\u003c/a\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\u003ca href=\"#wallet-less-onboarding\"\u003eWallet-less Onboarding\u003c/a\u003e\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"#blockchain-native-onboarding\"\u003eBlockchain-Native Onboarding\u003c/a\u003e\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"#gameplay\"\u003eGameplay\u003c/a\u003e\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"#edge-case-resolution\"\u003eEdge Case Resolution\u003c/a\u003e\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"#demo-on-emulator\"\u003eDemo on Emulator\u003c/a\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\u003ca href=\"#pre-requisites\"\u003ePre-Requisites\u003c/a\u003e\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"#walletless-demo-walkthrough\"\u003eWalletless Demo Walkthrough\u003c/a\u003e\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"#blockchain-native-onboarding-demo\"\u003eBlockchain-Native Onboarding Demo\u003c/a\u003e\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/details\u003e\n\u003chr\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch1 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eOverview\u003c/h1\u003e\u003ca id=\"user-content-overview\" class=\"anchor\" aria-label=\"Permalink: Overview\" href=\"#overview\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eAs gaming makes its way into Web 3.0, bringing with it the next swath of mainstream users, we created this repo as a playground to develop proof of concept implementations that showcase the power of onchain games built with the Cadence resource-oriented programming language. Through this exploration, we discovered the importance of improving onboarding and reducing in-app UX friction, and so iterated our way to an initial \u003ca href=\"https://flow.com/post/flow-blockchain-mainstream-adoption-easy-onboarding-wallets\" rel=\"nofollow\"\u003ehybrid custody model\u003c/a\u003e. It's our hope that the work and exploration here uncovers unique design patterns that are useful towards composable game designs and, more broadly, novel custody models, helping to pave the way for a thriving community of developers building the best apps in the world on Flow.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eFor our first proof of concept game, we've created the \u003ccode\u003eRockPaperScissorsGame\u003c/code\u003e and supporting contract \u003ccode\u003eGamingMetadataViews\u003c/code\u003e.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eAs a learning ground for upcoming Cadence \u003ca href=\"https://developers.flow.com/cadence/language/attachments#docusaurus_skipToContent_fallback\" rel=\"nofollow\"\u003eAttachments\u003c/a\u003e, we wanted to demonstrate how NFT metadata could update with gameplay in an entirely separate contract than the NFT was defined. So we created \u003ccode\u003eDynamicNFT\u003c/code\u003e which contains interfaces for attachments \u0026amp; receivers for those attachments.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eThe attachment receiver portion of that model is implemented in \u003ccode\u003eGamePieceNFT\u003c/code\u003e (modeled heavily after \u003ca href=\"https://github.com/onflow/monster-maker\"\u003e\u003ccode\u003eMonsterMaker\u003c/code\u003e\u003c/a\u003e) and the attachments are implemented in \u003ccode\u003eRockPaperScissorsGame\u003c/code\u003e.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eTaken together with any NFT implementing \u003ccode\u003eDynamicNFT\u003c/code\u003e, these contracts define an entirely onchain game with a dynamic NFT that accesses an ongoing record of its win/loss data.\u003c/p\u003e\n\u003cblockquote\u003e\n\u003cp dir=\"auto\"\u003eℹ️ While Hybrid Custody contracts \u0026amp; transactions are included in this repo, they're not critical to the core gameplay logic. It's recommended that readers focus on understanding the game-related contracts and components and layer on the process of account linking in the context of the application user flow.\u003c/p\u003e\n\u003c/blockquote\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eGameplay Overview\u003c/h2\u003e\u003ca id=\"user-content-gameplay-overview\" class=\"anchor\" aria-label=\"Permalink: Gameplay Overview\" href=\"#gameplay-overview\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003ePlayers engage in single or two-player single round matches of RPS. After configuring their \u003ccode\u003eGamePlayer\u003c/code\u003e resource, users can start a match by escrowing a \u003ccode\u003eGamePieceNFT\u003c/code\u003e. The match is playable once both players have escrowed their NFTs (or after the first player to escrow if in single player mode). The escrowed NFT gets an attachment enabling retrieval of its win/loss record and another that maintains the playable moves for the game - rock, paper, and scissors, as expected.\u003c/p\u003e\n\u003cblockquote\u003e\n\u003cp dir=\"auto\"\u003eℹ️ NFTs are escrowed into matches to ensure the NFT provided is a) actually owned by the player and b) players can't bypass updates to their NFT's win/loss record.\u003c/p\u003e\n\u003c/blockquote\u003e\n\u003cp dir=\"auto\"\u003eOnce playable, the match proceeds in stages - commit and resolve (to be replaced by a commit-reveal pattern to obfuscate onchain moves). Players must first commit their moves. After both players have submitted moves, the match can be resolved. On resolution, a winner is determined and the associated NFT's win/loss record is amended with the match results.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eOf course, once the match is over (or if a timeout is reached without resolution) the escrowed NFTs can then be returned to their respective escrowing players.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eThings get much more interesting when the onchain game is coupled with account linking - seen in \u003ca href=\"https://walletless-arcade-game.vercel.app/\" rel=\"nofollow\"\u003ethis demo\u003c/a\u003e - allowing for embedded wallets to abstract transaction execution in-app while unlocking those in-app assets to be accessible by a user's primary wallet. To facilitate a fuller game experience in said app, \u003ccode\u003eTicketToken\u003c/code\u003e was introduced as a player reward for winning matches, just like you'd win in an real arcade!\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eMarketplace Overview\u003c/h2\u003e\u003ca id=\"user-content-marketplace-overview\" class=\"anchor\" aria-label=\"Permalink: Marketplace Overview\" href=\"#marketplace-overview\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eThe accompanying \u003ccode\u003eTicketToken\u003c/code\u003e and \u003ccode\u003eArcadePrize\u003c/code\u003e contracts aren't special in and of themselves - simple FT and NFT contracts. However, once a user links their wallet with the app account used to play the game - the account issued \u003ccode\u003eTicketToken\u003c/code\u003e when the player wins a match - the authenticated account is issued access to the app account. This link between accounts exists onchain and establishes what we'll call a \"parent-child\" hierarchy between user accounts where the user's wallet mediated account is the \"parent\" to the partitioned \"child\" account.\u003c/p\u003e\n\u003cblockquote\u003e\n\u003cp dir=\"auto\"\u003eℹ️ This setup introduces account models similar to Web2's app authorization into our decentralized Web3 context. Linked child accounts can be thought of as sub-accounts to the parent, allowing both the user \u003cstrong\u003eand\u003c/strong\u003e the custodial party (game app in this case) to maintain access on the app-managed account.\u003c/p\u003e\n\u003c/blockquote\u003e\n\u003cp dir=\"auto\"\u003eAfter linking, the user can authenticate in other unrelated apps with their wallet, and any app recognizing Hybrid Custody accounts can identify all associated child accounts, their contents, and facilitate transactions interacting with child-account custodied assets with a transaction signed by the parent account alone.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eTo demonstrate this, \u003ccode\u003eArcadePrize\u003c/code\u003e accepts \u003ccode\u003eTicketToken\u003c/code\u003e redemption for minting NFTs. Redeeming FTs for NFTs isn't new, but the ability to sign a transaction with one account and, using delegated account access, acquire funds from another to mint an NFT to the signing account \u003cstrong\u003eis\u003c/strong\u003e new, and it solves an enormous problem in the Web3 app experience.\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch1 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eComponents\u003c/h1\u003e\u003ca id=\"user-content-components\" class=\"anchor\" aria-label=\"Permalink: Components\" href=\"#components\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eGaming\u003c/h2\u003e\u003ca id=\"user-content-gaming\" class=\"anchor\" aria-label=\"Permalink: Gaming\" href=\"#gaming\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eGamingMetadataViews\u003c/strong\u003e - Defining the metadata structs relevant to an NFT's win/loss data and assigned moves as well as interfaces designed to be implemented as attachments for NFTs. These interfaces enable the implementing contracts to alter values associated with data on an NFT's attachments via limited access control, a useful feature for smart contract game development, among other use cases.\u003c/p\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eRockPaperScissorsGame\u003c/strong\u003e - As you might imagine, this contract contains the game's moves, logic as well as resources and interfaces defining the rules of engagement in the course of a match. Additionally, receivers for Capabilities to matches are defined in \u003ccode\u003eGamePlayer\u003c/code\u003e resource and interfaces that allow players to create matches, be added and add others to matches, and engage with the matches they're in. The \u003ccode\u003eMatch\u003c/code\u003e resource is defined as a single round of Rock, Paper, Scissors that can be played in either single or two player modes, with single-player modes randomizing the second player's move on a contract function call.\u003c/p\u003e\n\u003c/li\u003e\n\u003c/ul\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eSupporting\u003c/h2\u003e\u003ca id=\"user-content-supporting\" class=\"anchor\" aria-label=\"Permalink: Supporting\" href=\"#supporting\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\u003cstrong\u003eDynamicNFT\u003c/strong\u003e - This contract defines interfaces for attachments \u0026amp; resources which receive those attachments as nested resources as well as resolve metadata related those attachments.\u003c/li\u003e\n\u003cli\u003e\u003cstrong\u003eGamePieceNFT\u003c/strong\u003e - An example NFT implementation of \u003ccode\u003eDynamicNFT\u003c/code\u003e, \u003ca href=\"https://monster-maker-web-client.vercel.app/\" rel=\"nofollow\"\u003efeaturing png's seen elsewhere\u003c/a\u003e in Flow demos, and used to demonstrate NFT escrow in \u003ccode\u003eRockPaperScissorsGame\u003c/code\u003e gameplay.\u003c/li\u003e\n\u003cli\u003e\u003cstrong\u003eTicketToken\u003c/strong\u003e - A simple FungibleToken implementation intended for use as redemption tokens in exchange for \u003ccode\u003eArcadePrize\u003c/code\u003e NFTs\u003c/li\u003e\n\u003cli\u003e\u003cstrong\u003eArcadePrize\u003c/strong\u003e - Another example implementation, this time of a NonFungibleToken. Minting requires \u003ccode\u003eTicketToken\u003c/code\u003e redemption. An interesting note, you can redeem\u003c/li\u003e\n\u003c/ul\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eHybrid Custody\u003c/h2\u003e\u003ca id=\"user-content-hybrid-custody\" class=\"anchor\" aria-label=\"Permalink: Hybrid Custody\" href=\"#hybrid-custody\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eContracts enabling account linking are not critical to the gameplay, but layer nicely to create a smooth in-app experience. While understanding the Hybrid Custody contracts is useful, it's recommended you focus on understanding the game-related contracts and components before layering on these mental constructs if you're solely intersted in understanding the mechanics of the onchain gaming.\u003c/p\u003e\n\u003cblockquote\u003e\n\u003cp dir=\"auto\"\u003eℹ️ For more info on the parts making up \u003ccode\u003eHybridCustody\u003c/code\u003e, check out \u003ca href=\"https://developers.flow.com/concepts/account-linking\" rel=\"nofollow\"\u003ethese docs\u003c/a\u003e\u003c/p\u003e\n\u003c/blockquote\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eComposition\u003c/h2\u003e\u003ca id=\"user-content-composition\" class=\"anchor\" aria-label=\"Permalink: Composition\" href=\"#composition\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eTaking a look at \u003ccode\u003eRockPaperScissorsGame\u003c/code\u003e, you'll see that it stands on its own - a user with any \u003ccode\u003eDynamicNFT\u003c/code\u003e can engage with the game to play single and multiplayer matches. The same goes for \u003ccode\u003eTicketToken\u003c/code\u003e and \u003ccode\u003eGamePieceNFT\u003c/code\u003e contracts in that they are independent components not necessarily designed to be used together.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eEach set of contracts were created as composable building blocks and used together to create a unique app experience.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003e\u003ccode\u003eHybridCustody\u003c/code\u003e was layered on to solve both the app UX problem created by the current dichotomous app- v. self-custody paradigms and to give users access to in-app assets outside the context of the custodial app.\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch3 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eConsiderations\u003c/h3\u003e\u003ca id=\"user-content-considerations\" class=\"anchor\" aria-label=\"Permalink: Considerations\" href=\"#considerations\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eOptimizing for openness and interoperability is not without its tradeoffs.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eThe game contract's use of any NFT maximizes composability, but it means that NFTs with the same ID cause collisions in the win/loss record mapping indexed on escrowed NFT IDs. This shouldn't be an issue for NFTs that assign ids on UUIDs, but users could experience a case where they effectively share a win/loss record with another NFT of the same ID. This could be handled by indexing on the hash of an NFT's ID along with its Type which should yield a unique value or alternatively, the NFTs UUID. The latter would be a harder ask as it's unlikely a requestor would have the NFT's UUID on hand if it's not already the equivalent to its ID. In the end, the contract indexes on UUID.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eA bit of a note on best practices...it's evident that defining onchain game logic must involve adversarial thinking. For example, we could have (and did at one point) return NFTs from escrow on match resolution to remove the need for an additional function call. However, we discovered that a malicious player could technically prevent \u003ccode\u003eMatch\u003c/code\u003e resolution (a custom \u003ccode\u003eReceiver\u003c/code\u003e could \u003ccode\u003epanic\u003c/code\u003e on \u003ccode\u003edeposit()\u003c/code\u003e). This along with the revelation that a malicious player could also assure game outcomes with the afforementioned post-condition on match results led us to the commit-resolve pattern you see in the contracts \u0026amp; transactions.\u003c/p\u003e\n\u003chr\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch1 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eUser Walkthrough\u003c/h1\u003e\u003ca id=\"user-content-user-walkthrough\" class=\"anchor\" aria-label=\"Permalink: User Walkthrough\" href=\"#user-walkthrough\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eWith the context and components explained, we can more closely examine how they interact in an end-to-end user experience. For simplicity, we'll assume everything goes as it's designed and walk the happy path.\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eOnboarding\u003c/h2\u003e\u003ca id=\"user-content-onboarding\" class=\"anchor\" aria-label=\"Permalink: Onboarding\" href=\"#onboarding\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eWith linked accounts, there are two ways a user can onboard.\u003c/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003e🌈 \u003cstrong\u003e\"Wallet-less\" onboarding\u003c/strong\u003e - First, a app can onboard a user with Web2 credentials, creating a Flow account for the user and abstracting away key management.\u003c/p\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003e🔗 \u003cstrong\u003e\"Blockchain-native\" onboarding flow\u003c/strong\u003e - Second, a user native to the Flow ecosystem can connect their wallet and start the app experience with controll over the app account. In our version, the app will still abstract key management, but will additionally delegate control over the app account to the user's authenticated account via AuthAccount Capabilities.\u003c/p\u003e\n\u003c/li\u003e\n\u003c/ul\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch3 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eWallet-less Onboarding\u003c/h3\u003e\u003ca id=\"user-content-wallet-less-onboarding\" class=\"anchor\" aria-label=\"Permalink: Wallet-less Onboarding\" href=\"#wallet-less-onboarding\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eAfter a user authenticates via some traditional Web2 authentication mechanism, the app initiates walletless onboarding\u003c/p\u003e\n\u003col dir=\"auto\"\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003eA new public/private key pair is generated\u003c/p\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003eProviding the generated public key, initial funding amount, and \u003ccode\u003eMonsterComponent\u003c/code\u003e NFT attributes, the walletless onboarding transaction starts by creating a new account from the signer's \u003ccode\u003eAccountCreator\u003c/code\u003e resource.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003e\u003cg-emoji class=\"g-emoji\" alias=\"warning\"\u003e⚠️\u003c/g-emoji\u003e Note that any old account creation mechanism can be used in your walletless onboarding flow, but this resource allowed us to query created addresses from custodied keys.\u003c/p\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003eA \u003ccode\u003eGamePieceNFT\u003c/code\u003e Collection is configured in the new account\u003c/p\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003eThe signer mints a \u003ccode\u003eGamePieceNFT\u003c/code\u003e to the new account's Collection\u003c/p\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003eA \u003ccode\u003eGamePlayer\u003c/code\u003e resource is configured in the new account so it can play \u003ccode\u003eRockPaperScissorsGame.Match\u003c/code\u003ees\u003c/p\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003eA \u003ccode\u003eTicketToken.Vault\u003c/code\u003e is saved \u0026amp; linked in the new account\u003c/p\u003e\n\u003c/li\u003e\n\u003c/ol\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch3 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eBlockchain-native Onboarding\u003c/h3\u003e\u003ca id=\"user-content-blockchain-native-onboarding\" class=\"anchor\" aria-label=\"Permalink: Blockchain-native Onboarding\" href=\"#blockchain-native-onboarding\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eAfter a user's wallet has been connected, run the blockchain-native multisig onboarding transaction signed by both a developer account \u0026amp; the user. Note that this would require a backend account pre-configured with an \u003ccode\u003eAccountCreator\u003c/code\u003e \u0026amp; funded with FLOW to pay for new account creation, though account creation can be handled by many other mechanisms.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eThis onboarding transaction does the following.\u003c/p\u003e\n\u003col dir=\"auto\"\u003e\n\u003cli\u003eGiven a generated public key (private key managed by the game dev), funding amount, a minter address, and hybrid custody filter \u0026amp; factory addresses\u003c/li\u003e\n\u003cli\u003eCreates a new account \u0026amp; optionally funds it with $FLOW\u003c/li\u003e\n\u003cli\u003eConfigures the account with a \u003ccode\u003eGamePieceNFT\u003c/code\u003e Collection\u003c/li\u003e\n\u003cli\u003eConfigures the new account with a \u003ccode\u003eGamePlayer\u003c/code\u003e resource\u003c/li\u003e\n\u003cli\u003eSets up a \u003ccode\u003eTicketToken\u003c/code\u003e Vault in the new account\u003c/li\u003e\n\u003cli\u003eSets up \u003ccode\u003eGamePieceNFT.Collection\u003c/code\u003e in the user's connected account\u003c/li\u003e\n\u003cli\u003eSets up a \u003ccode\u003eTicketToken.Vault\u003c/code\u003e in the user's connected account\u003c/li\u003e\n\u003cli\u003ePreps the new account to link to the signing user's account, setting up an \u003ccode\u003eHybridCustody.OwnedAccount\u003c/code\u003e resource in the new account\u003c/li\u003e\n\u003cli\u003eConfigures a \u003ccode\u003eHybridCustody.Manager\u003c/code\u003e in the user's account\u003c/li\u003e\n\u003cli\u003eMints a \u003ccode\u003eGamePieceNFT\u003c/code\u003e to the new account's \u003ccode\u003eCollection\u003c/code\u003e\u003c/li\u003e\n\u003cli\u003eLinks the new account as a child of the user's account, saving a Capability on the child account in the user's \u003ccode\u003eHybridCustody.Manager\u003c/code\u003e\u003c/li\u003e\n\u003c/ol\u003e\n\u003cblockquote\u003e\n\u003cp dir=\"auto\"\u003eℹ️ The output of this transaction is a new account, custodied by the key provider, fully configured for gameplay, and linked to the signing user's account as a child account. \u003cstrong\u003eBoth\u003c/strong\u003e the user \u003cstrong\u003eand\u003c/strong\u003e the application have access on the new account - the user via \u003ccode\u003eHybridCustody\u003c/code\u003e and the app via key custody.\u003c/p\u003e\n\u003c/blockquote\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eGameplay\u003c/h2\u003e\u003ca id=\"user-content-gameplay\" class=\"anchor\" aria-label=\"Permalink: Gameplay\" href=\"#gameplay\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\n\u003cdetails\u003e\u003csummary\u003eSingle-Player Gameplay\u003c/summary\u003e\n\u003col dir=\"auto\"\u003e\n\u003cli\u003ePlayer creates a new match, escrowing their NFT along with their NFT \u003ccode\u003eReceiver\u003c/code\u003e. Note that match timeout is established on creation, which prevents the escrowed NFT from being retrieved during gameplay.\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\u003ccode\u003eRPSAssignedMoves\u003c/code\u003e and \u003ccode\u003eRPSWinLossRetriever\u003c/code\u003e are attached to their escrowed NFT if they are not already attached\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/li\u003e\n\u003cli\u003ePlayer submits their move\u003c/li\u003e\n\u003cli\u003ePlayer calls for automated player's move to be submitted\u003c/li\u003e\n\u003cli\u003eIn a separate transaction (enforced by block height), player calls \u003ccode\u003eresolveMatch()\u003c/code\u003e to determine the outcome of the \u003ccode\u003eMatch\u003c/code\u003e\n\u003col dir=\"auto\"\u003e\n\u003cli\u003eThe win/loss record is recorded for the player's NFT\u003c/li\u003e\n\u003cli\u003eThe win/loss record is recorded for the designated contract's \u003ccode\u003edummyNFTID\u003c/code\u003e\u003c/li\u003e\n\u003cli\u003eThe escrowed NFT is returned to the escrowing player\u003c/li\u003e\n\u003c/ol\u003e\n\u003c/li\u003e\n\u003cli\u003ePlayer calls for escrowed NFT to be returned via \u003ccode\u003ereturnPlayersNFTs()\u003c/code\u003e. Since the \u003ccode\u003eMatch\u003c/code\u003e returns the escrowed NFTs directly via the given \u003ccode\u003eReceiver\u003c/code\u003e Capability, we made this a separate call to prevent malicious Capabilities from disallowing resolution. In this case, the worst a malicious Capability could do would be force the other player to call \u003ccode\u003eretrieveUnclaimedNFT()\u003c/code\u003e in order to have their NFT returned.\u003c/li\u003e\n\u003c/ol\u003e\n \u003c/details\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cdetails\u003e\u003csummary\u003eMulti-Player Gameplay\u003c/summary\u003e\n\u003col dir=\"auto\"\u003e\n\u003cli\u003ePlayer one creates a new match, escrowing their NFT. Note that match timeout is established on creation, which prevents the escrowed NFT from being retrieved during gameplay.\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\u003ccode\u003eRPSAssignedMoves\u003c/code\u003e and \u003ccode\u003eRPSWinLossRetriever\u003c/code\u003e are attached to their escrowed NFT if they are not already attached\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/li\u003e\n\u003cli\u003ePlayer one adds \u003ccode\u003eMatchLobbyActions\u003c/code\u003e Capability to Player two's \u003ccode\u003eGamePlayerPublic\u003c/code\u003e\n\u003col dir=\"auto\"\u003e\n\u003cli\u003ePlayer one gets \u003ccode\u003eGamePlayerPublic\u003c/code\u003e Capability from Player two\u003c/li\u003e\n\u003cli\u003ePlayer one calls \u003ccode\u003eaddPlayerToMatch()\u003c/code\u003e on their \u003ccode\u003eGamePlayer\u003c/code\u003e, passing the \u003ccode\u003ematchID\u003c/code\u003e and the reference to Player two's \u003ccode\u003eGamePlayerPublic\u003c/code\u003e\u003c/li\u003e\n\u003c/ol\u003e\n\u003c/li\u003e\n\u003cli\u003ePlayer two escrows their NFT into the match\n\u003col dir=\"auto\"\u003e\n\u003cli\u003e\u003ccode\u003eRPSAssignedMoves\u003c/code\u003e and \u003ccode\u003eRPSWinLossRetriever\u003c/code\u003e are attached to their escrowed NFT if they are not already attached\u003c/li\u003e\n\u003c/ol\u003e\n\u003c/li\u003e\n\u003cli\u003eEach player submits their move\u003c/li\u003e\n\u003cli\u003eAfter both moves have been submitted, any player can then call for match resolution\n\u003col dir=\"auto\"\u003e\n\u003cli\u003eA winner is determined\u003c/li\u003e\n\u003cli\u003eThe win/loss records are recorded for each NFT\u003c/li\u003e\n\u003cli\u003eEach NFT is returned to their respective owners\u003c/li\u003e\n\u003c/ol\u003e\n\u003c/li\u003e\n\u003cli\u003eAny player calls for escrowed NFT to be returned via \u003ccode\u003ereturnPlayersNFTs()\u003c/code\u003e. Since the \u003ccode\u003eMatch\u003c/code\u003e returns the escrowed NFTs directly via the given \u003ccode\u003eReceiver\u003c/code\u003e Capability, we made this a separate call to prevent malicious Capabilities from disallowing resolution. In this case, the worst a malicious Capability could do would be to require that the other player call \u003ccode\u003eretrieveUnclaimedNFT()\u003c/code\u003e in a separate transaction to retrieve their singular NFT from escrow.\u003c/li\u003e\n\u003c/ol\u003e\n \u003c/details\u003e\n\u003c/li\u003e\n\u003c/ul\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eEdge Case Resolution\u003c/h2\u003e\u003ca id=\"user-content-edge-case-resolution\" class=\"anchor\" aria-label=\"Permalink: Edge Case Resolution\" href=\"#edge-case-resolution\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch3 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003e\u003cstrong\u003eNFTs are escrowed, but the moves are never submitted\u003c/strong\u003e\u003c/h3\u003e\u003ca id=\"user-content-nfts-are-escrowed-but-the-moves-are-never-submitted\" class=\"anchor\" aria-label=\"Permalink: NFTs are escrowed, but the moves are never submitted\" href=\"#nfts-are-escrowed-but-the-moves-are-never-submitted\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eSince a match timeout is specified upon \u003ccode\u003eMatch\u003c/code\u003e creation and retrieval of \u003ccode\u003eNFT\u003c/code\u003es is contingent on either the timeout being reached or the \u003ccode\u003eMatch\u003c/code\u003e no longer being in play, a player can easily retrieve their \u003ccode\u003eNFT\u003c/code\u003e after timeout by calling \u003ccode\u003ereturnPlayerNFTs()\u003c/code\u003e on their \u003ccode\u003eMatchPlayerActions\u003c/code\u003e Capability.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eSince this Capability is linked on the game contract account which (in an actual stakes environment) shouldn't have active keys, the user can be assured that the Capability will not be unlinked. Additionally, since the method deposits the \u003ccode\u003eNFT\u003c/code\u003e to the \u003ccode\u003eReceiver\u003c/code\u003e provided upon escrow, they can be assured that it will not be accessible to anyone else calling \u003ccode\u003ereturnPlayerNFTs()\u003c/code\u003e.\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch3 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003e\u003cstrong\u003eNFTs are escrowed, but player unlinks their \u003ccode\u003eReceiver\u003c/code\u003e Capability before the NFT could be returned\u003c/strong\u003e\u003c/h3\u003e\u003ca id=\"user-content-nfts-are-escrowed-but-player-unlinks-their-receiver-capability-before-the-nft-could-be-returned\" class=\"anchor\" aria-label=\"Permalink: NFTs are escrowed, but player unlinks their Receiver Capability before the NFT could be returned\" href=\"#nfts-are-escrowed-but-player-unlinks-their-receiver-capability-before-the-nft-could-be-returned\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eIn this edge case, the \u003ccode\u003eReceiver\u003c/code\u003e Capability provided upon escrowing would no longer be linked to the depositing player’s \u003ccode\u003eCollection\u003c/code\u003e. In this case, as long as the escrowing player still has their \u003ccode\u003eGamePlayer\u003c/code\u003e, they could call \u003ccode\u003eretrieveUnclaimedNFT()\u003c/code\u003e, providing a reference to their \u003ccode\u003eGamePlayerID\u003c/code\u003e and the \u003ccode\u003eReceiver\u003c/code\u003e they want their NFT returned to.\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch3 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003e\u003cstrong\u003ePlayer provides a Receiver Capability that panics in its deposit() method\u003c/strong\u003e\u003c/h3\u003e\u003ca id=\"user-content-player-provides-a-receiver-capability-that-panics-in-its-deposit-method\" class=\"anchor\" aria-label=\"Permalink: Player provides a Receiver Capability that panics in its deposit() method\" href=\"#player-provides-a-receiver-capability-that-panics-in-its-deposit-method\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eThis wouldn't be encountered by the \u003ccode\u003eMatch\u003c/code\u003e until \u003ccode\u003ereturnPlayerNFTs()\u003c/code\u003e is called after match resolution. Depending on the order of the \u003ccode\u003eReceiver\u003c/code\u003e Capabilities in the \u003ccode\u003enftReceivers\u003c/code\u003e mapping, this could prevent the other player from retrieving their NFT via that function. At that point, however, the winner \u0026amp; loser have been decided and the game is over (\u003ccode\u003einPlay == false\u003c/code\u003e). The other player could then call \u003ccode\u003eretrieveUnclaimedNFT()\u003c/code\u003e to retrieve the NFT that the trolling Receiver was preventing from being returned.\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch3 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003e\u003cstrong\u003ePlayer changes their mind after NFT escrow \u0026amp; before move submission\u003c/strong\u003e\u003c/h3\u003e\u003ca id=\"user-content-player-changes-their-mind-after-nft-escrow--before-move-submission\" class=\"anchor\" aria-label=\"Permalink: Player changes their mind after NFT escrow \u0026amp; before move submission\" href=\"#player-changes-their-mind-after-nft-escrow--before-move-submission\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eIn the event a player changes their mind after creating a match, they'd currently have to wait the length of timeout to call \u003ccode\u003ereturnPlayerNFTs()\u003c/code\u003e. Changing this behavior is scoped as a future improvement to enable abandoning a match before initiating gameplay, likely only to be updated in singleplayer mode matches.\u003c/p\u003e\n\u003chr\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch1 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eDemo on Emulator\u003c/h1\u003e\u003ca id=\"user-content-demo-on-emulator\" class=\"anchor\" aria-label=\"Permalink: Demo on Emulator\" href=\"#demo-on-emulator\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eTo demo the functionality of this repo, clone it and follow the steps below by entering each command using \u003ca href=\"https://github.com/onflow/flow-cli\"\u003eFlow CLI\u003c/a\u003e from the package root:\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003ePre-Requisites\u003c/h2\u003e\u003ca id=\"user-content-pre-requisites\" class=\"anchor\" aria-label=\"Permalink: Pre-Requisites\" href=\"#pre-requisites\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003eStart the emulator \u0026amp; deploy the contracts\u003c/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003eIn one terminal window, run:\u003c/p\u003e\n\u003cdiv class=\"highlight highlight-source-shell notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"flow emulator\"\u003e\u003cpre\u003eflow emulator\u003c/pre\u003e\u003c/div\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003eIn another terminal window, run the setup script creating our accounts \u0026amp; deploying contracts:\u003c/p\u003e\n\u003cdiv class=\"highlight highlight-source-shell notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"sh setup.sh\"\u003e\u003cpre\u003esh setup.sh\u003c/pre\u003e\u003c/div\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003eLastly, a HybridCustody pre-requisite includes setting up a Capability \u003ccode\u003eFilter\u003c/code\u003e and Capability Factory \u003ccode\u003eManager\u003c/code\u003e. These ensure that parent account access is scoped to just the Capabilities they need to interact with the assets we as the developer want them to access. For more info on \u003ccode\u003eCapabilityFilter\u003c/code\u003e \u0026amp; \u003ccode\u003eCapabilityFactory\u003c/code\u003e, read \u003ca href=\"https://developers.flow.com/concepts/hybrid-custody/guides/linking-accounts#pre-requisites\" rel=\"nofollow\"\u003ethese docs\u003c/a\u003e.\u003c/p\u003e\n\u003cdiv class=\"highlight highlight-source-shell notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"flow transactions send ./transactions/hybrid_custody/dev_setup/setup_filter_and_factory_manager.cdc \\\n 045a1763c93006ca GamePieceNFT 045a1763c93006ca TicketToken --signer emulator-game\"\u003e\u003cpre\u003eflow transactions send ./transactions/hybrid_custody/dev_setup/setup_filter_and_factory_manager.cdc \\\n 045a1763c93006ca GamePieceNFT 045a1763c93006ca TicketToken --signer emulator-game\u003c/pre\u003e\u003c/div\u003e\n\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/li\u003e\n\u003c/ul\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eWalletless Demo Walkthrough\u003c/h2\u003e\u003ca id=\"user-content-walletless-demo-walkthrough\" class=\"anchor\" aria-label=\"Permalink: Walletless Demo Walkthrough\" href=\"#walletless-demo-walkthrough\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch3 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eOnboarding\u003c/h3\u003e\u003ca id=\"user-content-onboarding-1\" class=\"anchor\" aria-label=\"Permalink: Onboarding\" href=\"#onboarding-1\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003col dir=\"auto\"\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003eGenerate public/private key pair\u003c/p\u003e\n\u003cdiv class=\"highlight highlight-source-shell notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"flow keys generate\"\u003e\u003cpre\u003eflow keys generate\u003c/pre\u003e\u003c/div\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003eInitialize walletless onboarding\u003c/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\u003ccode\u003eonboarding/walletless_onboarding\u003c/code\u003e\n\u003col dir=\"auto\"\u003e\n\u003cli\u003e\u003ccode\u003epubKey: String,\u003c/code\u003e\u003c/li\u003e\n\u003cli\u003e\u003ccode\u003efundingAmt: UFix64,\u003c/code\u003e\u003c/li\u003e\n\u003cli\u003e\u003ccode\u003emonsterBackground: Int,\u003c/code\u003e\u003c/li\u003e\n\u003cli\u003e\u003ccode\u003emonsterHead: Int,\u003c/code\u003e\u003c/li\u003e\n\u003cli\u003e\u003ccode\u003emonsterTorso: Int,\u003c/code\u003e\u003c/li\u003e\n\u003cli\u003e\u003ccode\u003emonsterLeg: Int\u003c/code\u003e\u003c/li\u003e\n\u003c/ol\u003e\n\u003c/li\u003e\n\u003c/ul\u003e\n\u003cdiv class=\"highlight highlight-source-shell notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"flow transactions send transactions/onboarding/walletless_onboarding.cdc \u0026lt;PUBLIC_KEY\u0026gt; \u0026lt;FUNDING_AMT\u0026gt; \u0026lt;BACKGROUND\u0026gt; \u0026lt;HEAD\u0026gt; \u0026lt;TORSO\u0026gt; \u0026lt;LEG\u0026gt; --signer emulator-game\"\u003e\u003cpre\u003eflow transactions send transactions/onboarding/walletless_onboarding.cdc \u003cspan class=\"pl-k\"\u003e\u0026lt;\u003c/span\u003ePUBLIC_KEY\u003cspan class=\"pl-k\"\u003e\u0026gt;\u003c/span\u003e \u003cspan class=\"pl-k\"\u003e\u0026lt;\u003c/span\u003eFUNDING_AMT\u003cspan class=\"pl-k\"\u003e\u0026gt;\u003c/span\u003e \u003cspan class=\"pl-k\"\u003e\u0026lt;\u003c/span\u003eBACKGROUND\u003cspan class=\"pl-k\"\u003e\u0026gt;\u003c/span\u003e \u003cspan class=\"pl-k\"\u003e\u0026lt;\u003c/span\u003eHEAD\u003cspan class=\"pl-k\"\u003e\u0026gt;\u003c/span\u003e \u003cspan class=\"pl-k\"\u003e\u0026lt;\u003c/span\u003eTORSO\u003cspan class=\"pl-k\"\u003e\u0026gt;\u003c/span\u003e \u003cspan class=\"pl-k\"\u003e\u0026lt;\u003c/span\u003eLEG\u003cspan class=\"pl-k\"\u003e\u0026gt;\u003c/span\u003e --signer emulator-game\u003c/pre\u003e\u003c/div\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003eQuery for new account address from public key\u003c/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\u003ccode\u003echild_account/get_child_address_from_public_key_on_creator: Address\u003c/code\u003e\n\u003col dir=\"auto\"\u003e\n\u003cli\u003e\u003ccode\u003ecreatorAddress: Address\u003c/code\u003e\u003c/li\u003e\n\u003cli\u003e\u003ccode\u003epubKey: String\u003c/code\u003e\u003c/li\u003e\n\u003c/ol\u003e\n\u003c/li\u003e\n\u003c/ul\u003e\n\u003cdiv class=\"highlight highlight-source-shell notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"flow scripts execute scripts/account_creator/get_address_from_pub_key.cdc 045a1763c93006ca \u0026lt;PUBLIC_KEY\u0026gt;\"\u003e\u003cpre\u003eflow scripts execute scripts/account_creator/get_address_from_pub_key.cdc 045a1763c93006ca \u003cspan class=\"pl-k\"\u003e\u0026lt;\u003c/span\u003ePUBLIC_KEY\u003cspan class=\"pl-k\"\u003e\u0026gt;\u003c/span\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003eAdd the child account to your flow.json (assuming following along on flow-cli)\u003c/p\u003e\n\u003cdiv class=\"highlight highlight-source-json notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"\u0026quot;accounts\u0026quot;: {\n \u0026quot;emulator-account\u0026quot;: {\n \u0026quot;address\u0026quot;: \u0026quot;f8d6e0586b0a20c7\u0026quot;,\n \u0026quot;key\u0026quot;: \u0026quot;\u0026lt;EMULATOR_ACCOUNT_PRIVATE_KEY\u0026gt;\u0026quot;\n },\n \u0026quot;child\u0026quot;: {\n \u0026quot;address\u0026quot;: \u0026quot;01cf0e2f2f715450\u0026quot;,\n \u0026quot;key\u0026quot;: \u0026quot;\u0026lt;CHILD_PRIVATE_KEY\u0026gt;\u0026quot;\n }\n}\"\u003e\u003cpre\u003e\u003cspan class=\"pl-ent\"\u003e\"accounts\"\u003c/span\u003e: {\n \u003cspan class=\"pl-ent\"\u003e\"emulator-account\"\u003c/span\u003e: {\n \u003cspan class=\"pl-ent\"\u003e\"address\"\u003c/span\u003e: \u003cspan class=\"pl-s\"\u003e\u003cspan class=\"pl-pds\"\u003e\"\u003c/span\u003ef8d6e0586b0a20c7\u003cspan class=\"pl-pds\"\u003e\"\u003c/span\u003e\u003c/span\u003e,\n \u003cspan class=\"pl-ent\"\u003e\"key\"\u003c/span\u003e: \u003cspan class=\"pl-s\"\u003e\u003cspan class=\"pl-pds\"\u003e\"\u003c/span\u003e\u0026lt;EMULATOR_ACCOUNT_PRIVATE_KEY\u0026gt;\u003cspan class=\"pl-pds\"\u003e\"\u003c/span\u003e\u003c/span\u003e\n },\n \u003cspan class=\"pl-ent\"\u003e\"child\"\u003c/span\u003e: {\n \u003cspan class=\"pl-ent\"\u003e\"address\"\u003c/span\u003e: \u003cspan class=\"pl-s\"\u003e\u003cspan class=\"pl-pds\"\u003e\"\u003c/span\u003e01cf0e2f2f715450\u003cspan class=\"pl-pds\"\u003e\"\u003c/span\u003e\u003c/span\u003e,\n \u003cspan class=\"pl-ent\"\u003e\"key\"\u003c/span\u003e: \u003cspan class=\"pl-s\"\u003e\u003cspan class=\"pl-pds\"\u003e\"\u003c/span\u003e\u0026lt;CHILD_PRIVATE_KEY\u0026gt;\u003cspan class=\"pl-pds\"\u003e\"\u003c/span\u003e\u003c/span\u003e\n }\n}\u003c/pre\u003e\u003c/div\u003e\n\u003c/li\u003e\n\u003c/ol\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch3 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eGameplay\u003c/h3\u003e\u003ca id=\"user-content-gameplay-1\" class=\"anchor\" aria-label=\"Permalink: Gameplay\" href=\"#gameplay-1\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003col dir=\"auto\"\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003eQuery for \u003ccode\u003eNFT.id\u003c/code\u003e\u003c/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\u003ccode\u003egame_piece_nft/get_collection_ids: [UInt64]\u003c/code\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\u003ccode\u003eaddress: Address\u003c/code\u003e\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/li\u003e\n\u003c/ul\u003e\n\u003cdiv class=\"highlight highlight-source-shell notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"flow scripts execute scripts/game_piece_nft/get_collection_ids.cdc \u0026lt;CHILD_ADDRESS\u0026gt;\"\u003e\u003cpre\u003eflow scripts execute scripts/game_piece_nft/get_collection_ids.cdc \u003cspan class=\"pl-k\"\u003e\u0026lt;\u003c/span\u003eCHILD_ADDRESS\u003cspan class=\"pl-k\"\u003e\u0026gt;\u003c/span\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003eQuery for \u003ccode\u003eGamePlayer.id\u003c/code\u003e\u003c/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\u003ccode\u003erock_paper_scissors_game/get_game_player_id: UInt64\u003c/code\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\u003ccode\u003eplayerAddress: Address\u003c/code\u003e\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/li\u003e\n\u003c/ul\u003e\n\u003cdiv class=\"highlight highlight-source-shell notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"flow scripts execute scripts/rock_paper_scissors_game/get_game_player_id.cdc \u0026lt;CHILD_ADDRESS\u0026gt;\"\u003e\u003cpre\u003eflow scripts execute scripts/rock_paper_scissors_game/get_game_player_id.cdc \u003cspan class=\"pl-k\"\u003e\u0026lt;\u003c/span\u003eCHILD_ADDRESS\u003cspan class=\"pl-k\"\u003e\u0026gt;\u003c/span\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003eSetup a new singleplayer \u003ccode\u003eMatch\u003c/code\u003e\u003c/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\u003ccode\u003erock_paper_scissors_game/game_player/setup_new_singleplayer_match\u003c/code\u003e\n\u003col dir=\"auto\"\u003e\n\u003cli\u003e\u003ccode\u003esubmittingNFTID: UInt64\u003c/code\u003e\u003c/li\u003e\n\u003cli\u003e\u003ccode\u003ematchTimeLimitInMinutes: UInt\u003c/code\u003e\u003c/li\u003e\n\u003c/ol\u003e\n\u003c/li\u003e\n\u003c/ul\u003e\n\u003cdiv class=\"highlight highlight-source-shell notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"flow transactions send transactions/rock_paper_scissors_game/game_player/setup_new_singleplayer_match.cdc \u0026lt;NFT_ID\u0026gt; \u0026lt;TIME_LIMIT\u0026gt; --signer child\"\u003e\u003cpre\u003eflow transactions send transactions/rock_paper_scissors_game/game_player/setup_new_singleplayer_match.cdc \u003cspan class=\"pl-k\"\u003e\u0026lt;\u003c/span\u003eNFT_ID\u003cspan class=\"pl-k\"\u003e\u0026gt;\u003c/span\u003e \u003cspan class=\"pl-k\"\u003e\u0026lt;\u003c/span\u003eTIME_LIMIT\u003cspan class=\"pl-k\"\u003e\u0026gt;\u003c/span\u003e --signer child\u003c/pre\u003e\u003c/div\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003eQuery \u003ccode\u003eMatch.id\u003c/code\u003e\u003c/p\u003e\n\u003col dir=\"auto\"\u003e\n\u003cli\u003eListen for \u003ccode\u003eNewMatchCreated\u003c/code\u003e event filtered on \u003ccode\u003ecreatorID == GamePlayer.id\u003c/code\u003e\u003c/li\u003e\n\u003cli\u003e\u003ccode\u003erock_paper_scissors_game/get_matches_in_play: [UInt64]\u003c/code\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\u003ccode\u003eaddress: Address\u003c/code\u003e\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/li\u003e\n\u003c/ol\u003e\n\u003cdiv class=\"highlight highlight-source-shell notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"flow scripts execute scripts/rock_paper_scissors_game/get_matches_in_play.cdc \u0026lt;CHILD_ADDRESS\u0026gt;\"\u003e\u003cpre\u003eflow scripts execute scripts/rock_paper_scissors_game/get_matches_in_play.cdc \u003cspan class=\"pl-k\"\u003e\u0026lt;\u003c/span\u003eCHILD_ADDRESS\u003cspan class=\"pl-k\"\u003e\u0026gt;\u003c/span\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003eSubmit moves for the \u003ccode\u003eMatch\u003c/code\u003e\u003c/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\u003ccode\u003erock_paper_scissors_game/game_player/submit_both_singleplayer_moves\u003c/code\u003e\n\u003col dir=\"auto\"\u003e\n\u003cli\u003e\u003ccode\u003ematchID: UInt64\u003c/code\u003e\u003c/li\u003e\n\u003cli\u003e\u003ccode\u003emove: UInt8\u003c/code\u003e\u003c/li\u003e\n\u003c/ol\u003e\n\u003c/li\u003e\n\u003c/ul\u003e\n\u003cdiv class=\"highlight highlight-source-shell notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"flow transactions send transactions/rock_paper_scissors_game/game_player/submit_both_singleplayer_moves.cdc \u0026lt;MATCH_ID\u0026gt; \u0026lt;MOVE\u0026gt; --signer child\"\u003e\u003cpre\u003eflow transactions send transactions/rock_paper_scissors_game/game_player/submit_both_singleplayer_moves.cdc \u003cspan class=\"pl-k\"\u003e\u0026lt;\u003c/span\u003eMATCH_ID\u003cspan class=\"pl-k\"\u003e\u0026gt;\u003c/span\u003e \u003cspan class=\"pl-k\"\u003e\u0026lt;\u003c/span\u003eMOVE\u003cspan class=\"pl-k\"\u003e\u0026gt;\u003c/span\u003e --signer child\u003c/pre\u003e\u003c/div\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003eResolve \u003ccode\u003eMatch\u003c/code\u003e \u0026amp; return escrowed NFTs\u003c/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\u003ccode\u003erock_paper_scissors_game/game_player/resolve_match_and_return_nfts\u003c/code\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\u003ccode\u003ematchID: UInt64\u003c/code\u003e\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/li\u003e\n\u003c/ul\u003e\n\u003cdiv class=\"highlight highlight-source-shell notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"flow transactions send transactions/rock_paper_scissors_game/game_player/resolve_match_and_return_nfts.cdc \u0026lt;MATCH_ID\u0026gt; --signer child\"\u003e\u003cpre\u003eflow transactions send transactions/rock_paper_scissors_game/game_player/resolve_match_and_return_nfts.cdc \u003cspan class=\"pl-k\"\u003e\u0026lt;\u003c/span\u003eMATCH_ID\u003cspan class=\"pl-k\"\u003e\u0026gt;\u003c/span\u003e --signer child\u003c/pre\u003e\u003c/div\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003eQuery move history for both players one of a number of ways:\u003c/p\u003e\n\u003col dir=\"auto\"\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003eListen for \u003ccode\u003eMatchOver\u003c/code\u003e event filtered on \u003ccode\u003ematchID == Match.id\u003c/code\u003e and map user’s \u003ccode\u003eGamePlayer.id\u003c/code\u003e to \u003ccode\u003eplayer1ID\u003c/code\u003e or \u003ccode\u003eplayer2ID\u003c/code\u003e in the event values, displaying the \u003ccode\u003eplayer1MoveRawValue\u003c/code\u003e and \u003ccode\u003eplayer2MoveRawValue\u003c/code\u003e as appropriate\u003c/p\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003e\u003ccode\u003erock_paper_scissors_game/get_match_move_history: {UInt64: RockPaperScissorsGame.SubmittedMove}?\u003c/code\u003e\u003c/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\u003ccode\u003ematchID: UInt64\u003c/code\u003e\u003c/li\u003e\n\u003c/ul\u003e\n\u003cdiv class=\"highlight highlight-source-shell notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"flow scripts execute scripts/rock_paper_scissors_game/get_match_move_history.cdc \u0026lt;MATCH_ID\u0026gt;\"\u003e\u003cpre\u003eflow scripts execute scripts/rock_paper_scissors_game/get_match_move_history.cdc \u003cspan class=\"pl-k\"\u003e\u0026lt;\u003c/span\u003eMATCH_ID\u003cspan class=\"pl-k\"\u003e\u0026gt;\u003c/span\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003e\u003ccode\u003erock_paper_scissors_game/get_match_move_history_as_raw_values: {UInt64: UInt8}?\u003c/code\u003e\u003c/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\u003ccode\u003ematchID: UInt64\u003c/code\u003e\u003c/li\u003e\n\u003c/ul\u003e\n\u003cdiv class=\"highlight highlight-source-shell notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"flow scripts execute scripts/rock_paper_scissors_game/get_match_move_history_as_raw_values.cdc \u0026lt;MATCH_ID\u0026gt;\"\u003e\u003cpre\u003eflow scripts execute scripts/rock_paper_scissors_game/get_match_move_history_as_raw_values.cdc \u003cspan class=\"pl-k\"\u003e\u0026lt;\u003c/span\u003eMATCH_ID\u003cspan class=\"pl-k\"\u003e\u0026gt;\u003c/span\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003c/li\u003e\n\u003c/ol\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003eQuery player’s NFT win/loss record\u003c/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003e\u003ccode\u003egame_piece_nft/get_rps_win_loss: GamingMetadataViews.BasicWinLoss?\u003c/code\u003e\u003c/p\u003e\n\u003col dir=\"auto\"\u003e\n\u003cli\u003e\u003ccode\u003eaddress: Address\u003c/code\u003e\u003c/li\u003e\n\u003cli\u003e\u003ccode\u003eid: UInt64\u003c/code\u003e\u003c/li\u003e\n\u003c/ol\u003e\n\u003cdiv class=\"highlight highlight-source-shell notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"flow scripts execute scripts/game_piece_nft/get_rps_win_loss.cdc \u0026lt;CHILD_ADDRESS\u0026gt; \u0026lt;NFT_ID\u0026gt;\"\u003e\u003cpre\u003eflow scripts execute scripts/game_piece_nft/get_rps_win_loss.cdc \u003cspan class=\"pl-k\"\u003e\u0026lt;\u003c/span\u003eCHILD_ADDRESS\u003cspan class=\"pl-k\"\u003e\u0026gt;\u003c/span\u003e \u003cspan class=\"pl-k\"\u003e\u0026lt;\u003c/span\u003eNFT_ID\u003cspan class=\"pl-k\"\u003e\u0026gt;\u003c/span\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/li\u003e\n\u003c/ol\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch3 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eConnect Wallet \u0026amp; Link Accounts\u003c/h3\u003e\u003ca id=\"user-content-connect-wallet--link-accounts\" class=\"anchor\" aria-label=\"Permalink: Connect Wallet \u0026amp; Link Accounts\" href=\"#connect-wallet--link-accounts\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eThere are two ways to go about this process. One involves a multi-signature transaction where both the existing app account (soon to be “child” account) and the user’s main account (soon to be “parent” account) sign a transaction in which all changes are made. Another approach is to have the app account sign a transaction publishing its AuthAccount capability to then be claimed by the user’s account in a subsequent transaction.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eFor both the following transaction, you'll want to create an account if following along in flow-cli\u003c/p\u003e\n\u003cdiv class=\"highlight highlight-source-shell notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"flow accounts create # account name: parent | network: emulator\"\u003e\u003cpre\u003eflow accounts create \u003cspan class=\"pl-c\"\u003e\u003cspan class=\"pl-c\"\u003e#\u003c/span\u003e account name: parent | network: emulator\u003c/span\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003cblockquote\u003e\n\u003cp dir=\"auto\"\u003eℹ️ Depending on your use case and custodial architecture, you may find it easier to configure publish \u0026amp; claim; however, both linking modalities are included for illustration.\u003c/p\u003e\n\u003c/blockquote\u003e\n\u003cdetails\u003e\n\u003csummary\u003ePublish \u0026amp; Claim\u003c/summary\u003e\n\u003cp dir=\"auto\"\u003eThis process leverages the \u003ca href=\"https://developers.flow.com/cadence/language/accounts#account-inbox\" rel=\"nofollow\"\u003eaccount \u003ccode\u003eInbox\u003c/code\u003e\u003c/a\u003e and involves two steps:\u003c/p\u003e\n\u003col dir=\"auto\"\u003e\n\u003cli\u003e\u003ca href=\"/onflow/sc-eng-gaming/blob/main/transactions/hybrid_custody/setup_owned_account_and_publish_to_parent.cdc\"\u003ePublish\u003c/a\u003e\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"/onflow/sc-eng-gaming/blob/main/transactions/hybrid_custody/redeem_account.cdc\"\u003eClaim\u003c/a\u003e\u003c/li\u003e\n\u003c/ol\u003e\n\u003cp dir=\"auto\"\u003eThe app-custodied account sends the first transaction, configuring itself with \u003ccode\u003eHybridCustody\u003c/code\u003e constructs and publishing a \u003ccode\u003eChildAccoun\u003c/code\u003e Capability for the specified parent account. The user subsequently sends another transaction, claiming the published Capability and storing it in a \u003ccode\u003eHybridCustody.Manager\u003c/code\u003e (configuring one if needed).\u003c/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003eConfigure the app-custodied account as a child account \u0026amp; publish a capability on the account for the given parent account to claim\u003c/p\u003e\n\u003col dir=\"auto\"\u003e\n\u003cli\u003e\u003ccode\u003eparent: Address\u003c/code\u003e\u003c/li\u003e\n\u003cli\u003e\u003ccode\u003efactoryAddress: Address\u003c/code\u003e\u003c/li\u003e\n\u003cli\u003e\u003ccode\u003efilterAddress: Address\u003c/code\u003e\u003c/li\u003e\n\u003c/ol\u003e\n\u003cdiv class=\"highlight highlight-source-shell notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"flow transactions send transactions/hybrid_custody/setup_owned_account_and_publish_to_parent.cdc \u0026lt;PARENT_ADDRESS\u0026gt; 0x045a1763c93006ca 0x045a1763c93006ca --signer child\"\u003e\u003cpre\u003eflow transactions send transactions/hybrid_custody/setup_owned_account_and_publish_to_parent.cdc \u003cspan class=\"pl-k\"\u003e\u0026lt;\u003c/span\u003ePARENT_ADDRESS\u003cspan class=\"pl-k\"\u003e\u0026gt;\u003c/span\u003e 0x045a1763c93006ca 0x045a1763c93006ca --signer child\u003c/pre\u003e\u003c/div\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003eClaim the published \u003ccode\u003eChildAccount\u003c/code\u003e Capability \u0026amp; store in the signing parent account's \u003ccode\u003eManager\u003c/code\u003e\u003c/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\u003ccode\u003echildAddress: Address\u003c/code\u003e\u003c/li\u003e\n\u003c/ul\u003e\n\u003cdiv class=\"highlight highlight-source-shell notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"flow transactions send transactions/hybrid_custody/redeem_account.cdc \u0026lt;CHILD_ADDRESS\u0026gt; --signer parent\"\u003e\u003cpre\u003eflow transactions send transactions/hybrid_custody/redeem_account.cdc \u003cspan class=\"pl-k\"\u003e\u0026lt;\u003c/span\u003eCHILD_ADDRESS\u003cspan class=\"pl-k\"\u003e\u0026gt;\u003c/span\u003e --signer parent\u003c/pre\u003e\u003c/div\u003e\n\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eMulti-Sign\u003c/summary\u003e\n\u003cp dir=\"auto\"\u003eThis process condenses the publish \u0026amp; claim path into a single transaction signed by both the parent and child accounts. In this transaction, a \u003ccode\u003eHybridCustody.Manager\u003c/code\u003e is configured in the user’s main account, capturing the app account’s \u003ccode\u003eChildAccount\u003c/code\u003e capability in said \u003ccode\u003eManager\u003c/code\u003e. The signing parent account is also configured with \u003ccode\u003eGamePieceNFT.Collection\u003c/code\u003e and \u003ccode\u003eTicketToken.Vault\u003c/code\u003e so each asset can be easily transferred between accounts.\u003c/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003eBoth accounts sign the transaction, linking both accounts as parent-child and accomplishing Hybrid Custody.\u003c/p\u003e\n\u003col dir=\"auto\"\u003e\n\u003cli\u003e\u003ccode\u003echildAccountFactoryAddress: Address\u003c/code\u003e\u003c/li\u003e\n\u003cli\u003e\u003ccode\u003echildAccountFilterAddress: Address\u003c/code\u003e\u003c/li\u003e\n\u003c/ol\u003e\n\u003cdiv class=\"highlight highlight-source-shell notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"flow transactions build transactions/hybrid_custody/add_account_multi_sign.cdc \\\n 0x045a1763c93006ca 0x045a1763c93006ca \\\n --proposer parent --payer parent --authorizer parent --authorizer child \\\n --filter payload --save add_account_multi_sign.rlp\"\u003e\u003cpre\u003eflow transactions build transactions/hybrid_custody/add_account_multi_sign.cdc \\\n 0x045a1763c93006ca 0x045a1763c93006ca \\\n --proposer parent --payer parent --authorizer parent --authorizer child \\\n --filter payload --save add_account_multi_sign.rlp\u003c/pre\u003e\u003c/div\u003e\n\u003cdiv class=\"highlight highlight-source-shell notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"flow transactions sign add_as_child_multisig --signer parent --signer child --filter payload --save add_account_multi_sign.rlp\"\u003e\u003cpre\u003eflow transactions sign add_as_child_multisig --signer parent --signer child --filter payload --save add_account_multi_sign.rlp\u003c/pre\u003e\u003c/div\u003e\n\u003cdiv class=\"highlight highlight-source-shell notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"flow transactions send-signed add_account_multi_sign.rlp\"\u003e\u003cpre\u003eflow transactions send-signed add_account_multi_sign.rlp\u003c/pre\u003e\u003c/div\u003e\n\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/details\u003e\n\u003cp dir=\"auto\"\u003eAt the end of either process, the two accounts are linked by resource representation onchain and both are configured such that the app has all it needs to play the game on behalf of the player. The user’s main account (AKA parent account) maintains a Capability on the app account (AKA child account) via \u003ccode\u003eHybridCustody\u003c/code\u003e components, allowing the player to access in-app assets while the app maintains signing authority on behalf of the user when playing in-game.\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eBlockchain-Native Onboarding Demo\u003c/h2\u003e\u003ca id=\"user-content-blockchain-native-onboarding-demo\" class=\"anchor\" aria-label=\"Permalink: Blockchain-Native Onboarding Demo\" href=\"#blockchain-native-onboarding-demo\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\n🔔 Reminder to fulfill pre-requisites from above\n\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch3 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eOnboarding\u003c/h3\u003e\u003ca id=\"user-content-onboarding-2\" class=\"anchor\" aria-label=\"Permalink: Onboarding\" href=\"#onboarding-2\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003col dir=\"auto\"\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003eGenerate public/private key pair\u003c/p\u003e\n\u003cdiv class=\"highlight highlight-source-shell notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"flow keys generate\"\u003e\u003cpre\u003eflow keys generate\u003c/pre\u003e\u003c/div\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003eInitialize blockchain-native onboarding, signing as both the authenticated user and the application's backend account.\u003c/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003e\u003ccode\u003eonboarding/blockchain_native_onboarding\u003c/code\u003e\u003c/p\u003e\n\u003col dir=\"auto\"\u003e\n\u003cli\u003e\u003ccode\u003epubKey: String\u003c/code\u003e\u003c/li\u003e\n\u003cli\u003e\u003ccode\u003efundingAmt: UFix64\u003c/code\u003e\u003c/li\u003e\n\u003cli\u003e\u003ccode\u003efactoryAddress: Address\u003c/code\u003e\u003c/li\u003e\n\u003cli\u003e\u003ccode\u003efilterAddress: Address\u003c/code\u003e\u003c/li\u003e\n\u003cli\u003e\u003ccode\u003eminterAddress: Address\u003c/code\u003e\u003c/li\u003e\n\u003c/ol\u003e\n \n \u003cg-emoji class=\"g-emoji\" alias=\"warning\"\u003e⚠️\u003c/g-emoji\u003e Note: If you’re using `flow-cli`, you’ll want to add the created account as `“child”` to your `flow.json` before continuing. This is similar to the same step in walletless onboarding above\n \n\u003c/li\u003e\n\u003c/ul\u003e\n\u003cdiv class=\"highlight highlight-source-shell notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"flow transactions execute transactions/onboarding/blockchain_native_onboarding.cdc \\\n \u0026lt;PUBLIC_KEY\u0026gt; 0.5 0x045a1763c93006ca 0x045a1763c93006ca 0x045a1763c93006ca \\\n --proposer emulator-game --payer emulator-game --authorizer parent --authorizer emulator-game \\\n --filter payload --save blockchain_native_onboarding.rlp\"\u003e\u003cpre\u003eflow transactions execute transactions/onboarding/blockchain_native_onboarding.cdc \\\n \u003cspan class=\"pl-k\"\u003e\u0026lt;\u003c/span\u003ePUBLIC_KEY\u003cspan class=\"pl-k\"\u003e\u0026gt;\u003c/span\u003e 0.5 0x045a1763c93006ca 0x045a1763c93006ca 0x045a1763c93006ca \\\n --proposer emulator-game --payer emulator-game --authorizer parent --authorizer emulator-game \\\n --filter payload --save blockchain_native_onboarding.rlp\u003c/pre\u003e\u003c/div\u003e\n\u003cdiv class=\"highlight highlight-source-shell notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"flow transactions sign blockchain_native_onboarding.rlp --signer parent --signer emulator-game --filter payload --save blockchain_native_onboarding.rlp\"\u003e\u003cpre\u003eflow transactions sign blockchain_native_onboarding.rlp --signer parent --signer emulator-game --filter payload --save blockchain_native_onboarding.rlp\u003c/pre\u003e\u003c/div\u003e\n\u003cdiv class=\"highlight highlight-source-shell notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"flow transactions send-signed blockchain_native_onboarding.rlp\"\u003e\u003cpre\u003eflow transactions send-signed blockchain_native_onboarding.rlp\u003c/pre\u003e\u003c/div\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003eQuery for new account address from public key\u003c/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\u003ccode\u003eaccount_creator/get_address_from_pub_key.cdc\u003c/code\u003e\n\u003col dir=\"auto\"\u003e\n\u003cli\u003e\u003ccode\u003ecreatorAddress: Address\u003c/code\u003e\u003c/li\u003e\n\u003cli\u003e\u003ccode\u003epubKey: String\u003c/code\u003e\u003c/li\u003e\n\u003c/ol\u003e\n\u003c/li\u003e\n\u003c/ul\u003e\n\u003cdiv class=\"highlight highlight-source-shell notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"flow scripts execute scripts/account_creator/get_address_from_pub_key.cdc 045a1763c93006ca \u0026lt;PUBLIC_KEY\u0026gt;\"\u003e\u003cpre\u003eflow scripts execute scripts/account_creator/get_address_from_pub_key.cdc 045a1763c93006ca \u003cspan class=\"pl-k\"\u003e\u0026lt;\u003c/span\u003ePUBLIC_KEY\u003cspan class=\"pl-k\"\u003e\u0026gt;\u003c/span\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003c/li\u003e\n\u003c/ol\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch3 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eMinting TicketToken\u003c/h3\u003e\u003ca id=\"user-content-minting-tickettoken\" class=\"anchor\" aria-label=\"Permalink: Minting TicketToken\" href=\"#minting-tickettoken\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eBased on Match results (queried above in \u003ccode\u003egame_piece_nft/get_rps_win_loss\u003c/code\u003e) and checked against the user's \u003ccode\u003eGamePlayer.id\u003c/code\u003e (queried in \u003ccode\u003erock_paper_scissors_game/get_game_player_id\u003c/code\u003e), we’ll want to mint tokens to the child account’s \u003ccode\u003eTicketToken.Vault\u003c/code\u003e. These tokens can be redeemed for an \u003ccode\u003eArcadePrize.NFT\u003c/code\u003e later in the demo.\u003c/p\u003e\n\u003col dir=\"auto\"\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003eMint tokens to the player’s app account\u003c/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003e\u003ccode\u003eticket_token/mint_tokens\u003c/code\u003e\u003c/p\u003e\n\u003col dir=\"auto\"\u003e\n\u003cli\u003e\u003ccode\u003erecipient: Address\u003c/code\u003e\u003c/li\u003e\n\u003cli\u003e\u003ccode\u003eamount: UFix64\u003c/code\u003e\u003c/li\u003e\n\u003c/ol\u003e\n\u003cdiv class=\"highlight highlight-source-shell notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"flow transactions send transactions/ticket_token/mint_tokens.cdc \u0026lt;CHILD_ADDRESS\u0026gt; \u0026lt;AMOUNT\u0026gt;\"\u003e\u003cpre\u003eflow transactions send transactions/ticket_token/mint_tokens.cdc \u003cspan class=\"pl-k\"\u003e\u0026lt;\u003c/span\u003eCHILD_ADDRESS\u003cspan class=\"pl-k\"\u003e\u0026gt;\u003c/span\u003e \u003cspan class=\"pl-k\"\u003e\u0026lt;\u003c/span\u003eAMOUNT\u003cspan class=\"pl-k\"\u003e\u0026gt;\u003c/span\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003eQuery the balance of tokens in the account\u003c/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\u003ccode\u003eticket_token/get_balance: UFix64\u003c/code\u003e - panics if Vault is not configured\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\u003ccode\u003eof: Address\u003c/code\u003e\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/li\u003e\n\u003c/ul\u003e\n\u003cdiv class=\"highlight highlight-source-shell notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"flow scripts execute scripts/ticket_token/get_balance.cdc \u0026lt;CHILD_ADDRESS\u0026gt;\"\u003e\u003cpre\u003eflow scripts execute scripts/ticket_token/get_balance.cdc \u003cspan class=\"pl-k\"\u003e\u0026lt;\u003c/span\u003eCHILD_ADDRESS\u003cspan class=\"pl-k\"\u003e\u0026gt;\u003c/span\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003c/li\u003e\n\u003c/ol\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch3 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eMinting ArcadePrize.NFT\u003c/h3\u003e\u003ca id=\"user-content-minting-arcadeprizenft\" class=\"anchor\" aria-label=\"Permalink: Minting ArcadePrize.NFT\" href=\"#minting-arcadeprizenft\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eIn this section, we’ll use the TicketToken.Vault in the child account to pay for an NFT to the signing account’s Collection. This serves as an example for how a app can present and utilize the assets in a connected account’s child account(s), creating a seamless experience compared to the fragmented UX previously inherent to isolated app accounts.\u003c/p\u003e\n\u003col dir=\"auto\"\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003eQuery for the TicketToken.Vault.balance in each of the user’s child accounts\u003c/p\u003e\n\u003col dir=\"auto\"\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003e\u003ccode\u003eticket_token/get_all_account_balances_from_storage: {Address: UFix64}\u003c/code\u003e\u003c/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\u003ccode\u003eparentAddress: Address\u003c/code\u003e\u003c/li\u003e\n\u003c/ul\u003e\n\u003cdiv class=\"highlight highlight-source-shell notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"flow scripts execute scripts/ticket_token/get_balance_of_all_child_accounts.cdc \u0026lt;PARENT_ADDRESS\u0026gt;\"\u003e\u003cpre\u003eflow scripts execute scripts/ticket_token/get_balance_of_all_child_accounts.cdc \u003cspan class=\"pl-k\"\u003e\u0026lt;\u003c/span\u003ePARENT_ADDRESS\u003cspan class=\"pl-k\"\u003e\u0026gt;\u003c/span\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003e\u003ccode\u003ehybrid_custody/get_all_vault_bal_from_storage: {Address: {Type: UFix64}}\u003c/code\u003e\u003c/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\u003ccode\u003eaddress: Address\u003c/code\u003e\u003c/li\u003e\n\u003c/ul\u003e\n\u003cdiv class=\"highlight highlight-source-shell notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"flow scripts execute scripts/hybrid_custody/get_all_vault_bal_from_storage.cdc \u0026lt;PARENT_ADDRESS\u0026gt;\"\u003e\u003cpre\u003eflow scripts execute scripts/hybrid_custody/get_all_vault_bal_from_storage.cdc \u003cspan class=\"pl-k\"\u003e\u0026lt;\u003c/span\u003ePARENT_ADDRESS\u003cspan class=\"pl-k\"\u003e\u0026gt;\u003c/span\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003cdiv class=\"highlight highlight-source-cadence notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"// Where VaultInfo has the following interface\npub struct VaultInfo {\n pub let name: String?\n pub let symbol: String?\n pub var balance: UFix64\n pub let description: String?\n pub let externalURL: String?\n pub let logos: MetadataViews.Medias?\n pub let storagePathIdentifier: String\n pub let receiverPathIdentifier: String?\n pub let providerPathIdentifier: String?\n\n pub fun addBalance(_ addition: UFix64)\n}\"\u003e\u003cpre\u003e\u003cspan class=\"pl-c\"\u003e\u003cspan class=\"pl-c\"\u003e//\u003c/span\u003e Where VaultInfo has the following interface\u003c/span\u003e\n\u003cspan class=\"pl-c\"\u003e\u003c/span\u003e\u003cspan class=\"pl-k\"\u003epub\u003c/span\u003e \u003cspan class=\"pl-k\"\u003estruct\u003c/span\u003e \u003cspan class=\"pl-en\"\u003eVaultInfo\u003c/span\u003e {\n \u003cspan class=\"pl-k\"\u003epub\u003c/span\u003e \u003cspan class=\"pl-k\"\u003elet\u003c/span\u003e \u003cspan class=\"pl-en\"\u003ename\u003c/span\u003e: \u003cspan class=\"pl-k\"\u003eString\u003c/span\u003e?\n \u003cspan class=\"pl-k\"\u003epub\u003c/span\u003e \u003cspan class=\"pl-k\"\u003elet\u003c/span\u003e \u003cspan class=\"pl-en\"\u003esymbol\u003c/span\u003e: \u003cspan class=\"pl-k\"\u003eString\u003c/span\u003e?\n \u003cspan class=\"pl-k\"\u003epub\u003c/span\u003e \u003cspan class=\"pl-k\"\u003evar\u003c/span\u003e \u003cspan class=\"pl-en\"\u003ebalance\u003c/span\u003e: \u003cspan class=\"pl-k\"\u003eUFix64\u003c/span\u003e\n \u003cspan class=\"pl-k\"\u003epub\u003c/span\u003e \u003cspan class=\"pl-k\"\u003elet\u003c/span\u003e \u003cspan class=\"pl-en\"\u003edescription\u003c/span\u003e: \u003cspan class=\"pl-k\"\u003eString\u003c/span\u003e?\n \u003cspan class=\"pl-k\"\u003epub\u003c/span\u003e \u003cspan class=\"pl-k\"\u003elet\u003c/span\u003e \u003cspan class=\"pl-en\"\u003eexternalURL\u003c/span\u003e: \u003cspan class=\"pl-k\"\u003eString\u003c/span\u003e?\n \u003cspan class=\"pl-k\"\u003epub\u003c/span\u003e \u003cspan class=\"pl-k\"\u003elet\u003c/span\u003e \u003cspan class=\"pl-en\"\u003elogos\u003c/span\u003e: \u003cspan class=\"pl-k\"\u003eMetadataViews\u003c/span\u003e.\u003cspan class=\"pl-k\"\u003eMedias\u003c/span\u003e?\n \u003cspan class=\"pl-k\"\u003epub\u003c/span\u003e \u003cspan class=\"pl-k\"\u003elet\u003c/span\u003e \u003cspan class=\"pl-en\"\u003estoragePathIdentifier\u003c/span\u003e: \u003cspan class=\"pl-k\"\u003eString\u003c/span\u003e\n \u003cspan class=\"pl-k\"\u003epub\u003c/span\u003e \u003cspan class=\"pl-k\"\u003elet\u003c/span\u003e \u003cspan class=\"pl-en\"\u003ereceiverPathIdentifier\u003c/span\u003e: \u003cspan class=\"pl-k\"\u003eString\u003c/span\u003e?\n \u003cspan class=\"pl-k\"\u003epub\u003c/span\u003e \u003cspan class=\"pl-k\"\u003elet\u003c/span\u003e \u003cspan class=\"pl-en\"\u003eproviderPathIdentifier\u003c/span\u003e: \u003cspan class=\"pl-k\"\u003eString\u003c/span\u003e?\n\n \u003cspan class=\"pl-k\"\u003epub\u003c/span\u003e \u003cspan class=\"pl-k\"\u003efun\u003c/span\u003e \u003cspan class=\"pl-en\"\u003eaddBalance\u003c/span\u003e(\u003cspan class=\"pl-en\"\u003e_\u003c/span\u003e \u003cspan class=\"pl-smi\"\u003eaddition\u003c/span\u003e: \u003cspan class=\"pl-k\"\u003eUFix64\u003c/span\u003e)\n}\u003c/pre\u003e\u003c/div\u003e\n\u003c/li\u003e\n\u003c/ol\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003eQuery for all publicly accessible NFTs in the connected account \u0026amp; its child accounts\u003c/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\u003ccode\u003ehybrid_custody/get_all_nft_display_views_from_storage: [NFTData]\u003c/code\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\u003ccode\u003eaddress: Address\u003c/code\u003e\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/li\u003e\n\u003c/ul\u003e\n\u003cdiv class=\"highlight highlight-source-shell notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"flow scripts execute scripts/hybrid_custody/get_all_nft_display_views_from_storage.cdc \u0026lt;PARENT_ADDRESS\u0026gt;\"\u003e\u003cpre\u003eflow scripts execute scripts/hybrid_custody/get_all_nft_display_views_from_storage.cdc \u003cspan class=\"pl-k\"\u003e\u0026lt;\u003c/span\u003ePARENT_ADDRESS\u003cspan class=\"pl-k\"\u003e\u0026gt;\u003c/span\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003cdiv class=\"highlight highlight-source-cadence notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"// Where NFTData has the following interface\npub struct NFTData {\n pub let name: String\n pub let description: String\n pub let thumbnail: String\n pub let resourceID: UInt64\n pub let ownerAddress: Address?\n pub let collectionName: String\n pub let collectionDescription: String\n pub let collectionURL: String\n pub let collectionStoragePathIdentifier: String?\n pub let collectionPublicPathIdentifier: String\n}\"\u003e\u003cpre\u003e\u003cspan class=\"pl-c\"\u003e\u003cspan class=\"pl-c\"\u003e//\u003c/span\u003e Where NFTData has the following interface\u003c/span\u003e\n\u003cspan class=\"pl-c\"\u003e\u003c/span\u003e\u003cspan class=\"pl-k\"\u003epub\u003c/span\u003e \u003cspan class=\"pl-k\"\u003estruct\u003c/span\u003e \u003cspan class=\"pl-en\"\u003eNFTData\u003c/span\u003e {\n \u003cspan class=\"pl-k\"\u003epub\u003c/span\u003e \u003cspan class=\"pl-k\"\u003elet\u003c/span\u003e \u003cspan class=\"pl-en\"\u003ename\u003c/span\u003e: \u003cspan class=\"pl-k\"\u003eString\u003c/span\u003e\n \u003cspan class=\"pl-k\"\u003epub\u003c/span\u003e \u003cspan class=\"pl-k\"\u003elet\u003c/span\u003e \u003cspan class=\"pl-en\"\u003edescription\u003c/span\u003e: \u003cspan class=\"pl-k\"\u003eString\u003c/span\u003e\n \u003cspan class=\"pl-k\"\u003epub\u003c/span\u003e \u003cspan class=\"pl-k\"\u003elet\u003c/span\u003e \u003cspan class=\"pl-en\"\u003ethumbnail\u003c/span\u003e: \u003cspan class=\"pl-k\"\u003eString\u003c/span\u003e\n \u003cspan class=\"pl-k\"\u003epub\u003c/span\u003e \u003cspan class=\"pl-k\"\u003elet\u003c/span\u003e \u003cspan class=\"pl-en\"\u003eresourceID\u003c/span\u003e: \u003cspan class=\"pl-k\"\u003eUInt64\u003c/span\u003e\n \u003cspan class=\"pl-k\"\u003epub\u003c/span\u003e \u003cspan class=\"pl-k\"\u003elet\u003c/span\u003e \u003cspan class=\"pl-en\"\u003eownerAddress\u003c/span\u003e: \u003cspan class=\"pl-k\"\u003eAddress\u003c/span\u003e?\n \u003cspan class=\"pl-k\"\u003epub\u003c/span\u003e \u003cspan class=\"pl-k\"\u003elet\u003c/span\u003e \u003cspan class=\"pl-en\"\u003ecollectionName\u003c/span\u003e: \u003cspan class=\"pl-k\"\u003eString\u003c/span\u003e\n \u003cspan class=\"pl-k\"\u003epub\u003c/span\u003e \u003cspan class=\"pl-k\"\u003elet\u003c/span\u003e \u003cspan class=\"pl-en\"\u003ecollectionDescription\u003c/span\u003e: \u003cspan class=\"pl-k\"\u003eString\u003c/span\u003e\n \u003cspan class=\"pl-k\"\u003epub\u003c/span\u003e \u003cspan class=\"pl-k\"\u003elet\u003c/span\u003e \u003cspan class=\"pl-en\"\u003ecollectionURL\u003c/span\u003e: \u003cspan class=\"pl-k\"\u003eString\u003c/span\u003e\n \u003cspan class=\"pl-k\"\u003epub\u003c/span\u003e \u003cspan class=\"pl-k\"\u003elet\u003c/span\u003e \u003cspan class=\"pl-en\"\u003ecollectionStoragePathIdentifier\u003c/span\u003e: \u003cspan class=\"pl-k\"\u003eString\u003c/span\u003e?\n \u003cspan class=\"pl-k\"\u003epub\u003c/span\u003e \u003cspan class=\"pl-k\"\u003elet\u003c/span\u003e \u003cspan class=\"pl-en\"\u003ecollectionPublicPathIdentifier\u003c/span\u003e: \u003cspan class=\"pl-k\"\u003eString\u003c/span\u003e\n}\u003c/pre\u003e\u003c/div\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003eMint a rainbow duck for 10.0 TicketTokens, redeeming the TicketTokens in the user’s child account \u0026amp; minting to the signer’s Collection\u003c/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\u003ccode\u003earcade_prize/mint_rainbow_duck_paying_with_child_vault\u003c/code\u003e\n\u003col dir=\"auto\"\u003e\n\u003cli\u003e\u003ccode\u003efundingChildAddress: Address\u003c/code\u003e\u003c/li\u003e\n\u003cli\u003e\u003ccode\u003eminterAddress: Address\u003c/code\u003e\u003c/li\u003e\n\u003c/ol\u003e\n\u003c/li\u003e\n\u003c/ul\u003e\n\u003cdiv class=\"highlight highlight-source-shell notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"flow transactions send transactions/arcade_prize/mint_rainbow_duck_paying_with_child_vault.cdc \u0026lt;CHILD_ADDRESS\u0026gt; 045a1763c93006ca --signer parent\"\u003e\u003cpre\u003eflow transactions send transactions/arcade_prize/mint_rainbow_duck_paying_with_child_vault.cdc \u003cspan class=\"pl-k\"\u003e\u0026lt;\u003c/span\u003eCHILD_ADDRESS\u003cspan class=\"pl-k\"\u003e\u0026gt;\u003c/span\u003e 045a1763c93006ca --signer parent\u003c/pre\u003e\u003c/div\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003eAgain query for all publicly accessible NFTs in the connected account \u0026amp; its child accounts to see the NFT that was minted among all of the user’s owned NFTs\u003c/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\u003ccode\u003ehybrid_custody/get_all_nft_display_views_from_storage: [NFTData]\u003c/code\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\u003ccode\u003eaddress: Address\u003c/code\u003e\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/li\u003e\n\u003c/ul\u003e\n\u003cdiv class=\"highlight highlight-source-shell notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"flow scripts execute scripts/hybrid_custody/get_all_nft_display_views_from_storage.cdc \u0026lt;PARENT_ADDRESS\u0026gt;\"\u003e\u003cpre\u003eflow scripts execute scripts/hybrid_custody/get_all_nft_display_views_from_storage.cdc \u003cspan class=\"pl-k\"\u003e\u0026lt;\u003c/span\u003ePARENT_ADDRESS\u003cspan class=\"pl-k\"\u003e\u0026gt;\u003c/span\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003c/li\u003e\n\u003c/ol\u003e\n\u003chr\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch1 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003ePlay Self-Custodied on Testnet\u003c/h1\u003e\u003ca id=\"user-content-play-self-custodied-on-testnet\" class=\"anchor\" aria-label=\"Permalink: Play Self-Custodied on Testnet\" href=\"#play-self-custodied-on-testnet\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eThe contracts in this repos have been deployed to\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eIf you want to play this game on testnet in a fully fledged Hybrid Custody app, check out our demo implementation \u003ca href=\"https://walletless-arcade-game.vercel.app/\" rel=\"nofollow\"\u003ehere\u003c/a\u003e.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eAs for good old fashioned self-custody, while you won't be able to perform TicketToken minting, you can play RockPaperScissors Matches using your own wallet and NFTs. You could however use your own NFTs to engage with the contracts via Flow CLI, \u003ca href=\"https://runflow.pratikpatel.io/\" rel=\"nofollow\"\u003eFlowRunner\u003c/a\u003e or \u003ca href=\"https://raft.page/nvdtf/welcome-to-raft\" rel=\"nofollow\"\u003eRaft\u003c/a\u003e. Here's how:\u003c/p\u003e\n\u003col dir=\"auto\"\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003eOnboard your account with GamePieceNFT Collection, NFT, \u0026amp; GamePlayer resource\u003c/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\u003ccode\u003eonboarding/self_custody_onboarding.cdc\u003c/code\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\u003ccode\u003eminterAddress: Address\u003c/code\u003e\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/li\u003e\n\u003c/ul\u003e\n\u003cdiv class=\"snippet-clipboard-content notranslate position-relative overflow-auto\" data-snippet-clipboard-copy-content=\"flow transactions send transactions/onboarding/self_custody_onboarding.cdc 917b2b1dafdcfa58 --signer \u0026lt;YOUR_ACCOUNT_NAME\u0026gt; --network testnet\"\u003e\u003cpre class=\"notranslate\"\u003e\u003ccode\u003eflow transactions send transactions/onboarding/self_custody_onboarding.cdc 917b2b1dafdcfa58 --signer \u0026lt;YOUR_ACCOUNT_NAME\u0026gt; --network testnet\n\u003c/code\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003col dir=\"auto\"\u003e\n\u003cli\u003eCheck out your new resources on \u003ca href=\"https://testnet.flowview.app/\" rel=\"nofollow\"\u003eFlowView\u003c/a\u003e \u0026amp; note your GamePlayer.id \u0026amp; NFT.id\u003c/li\u003e\n\u003c/ol\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003eAfter you have a Collection, NFT, \u0026amp; GamePlayer configured, you're ready to play the game!\u003c/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\u003ccode\u003erock_paper_scissors_game/game_player/setup_new_singleplayer_match.cdc\u003c/code\u003e\n\u003col dir=\"auto\"\u003e\n\u003cli\u003e\u003ccode\u003esubmittingNFTID: UInt64\u003c/code\u003e\u003c/li\u003e\n\u003cli\u003e\u003ccode\u003ematchTimeLimitInMinutes: UInt\u003c/code\u003e\u003c/li\u003e\n\u003c/ol\u003e\n\u003c/li\u003e\n\u003c/ul\u003e\n\u003cdiv class=\"snippet-clipboard-content notranslate position-relative overflow-auto\" data-snippet-clipboard-copy-content=\"flow transactions send transactions/rock_paper_scissors_game/game_player/setup_new_singleplayer_match.cdc \u0026lt;NFT_ID\u0026gt; \u0026lt;MATCH_TIMEOUT\u0026gt; --signer \u0026lt;YOUR_ACCOUNT_NAME\u0026gt; --network testnet\"\u003e\u003cpre class=\"notranslate\"\u003e\u003ccode\u003eflow transactions send transactions/rock_paper_scissors_game/game_player/setup_new_singleplayer_match.cdc \u0026lt;NFT_ID\u0026gt; \u0026lt;MATCH_TIMEOUT\u0026gt; --signer \u0026lt;YOUR_ACCOUNT_NAME\u0026gt; --network testnet\n\u003c/code\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003eSubmit your move \u0026amp; the randomized second player's move\u003c/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\u003ccode\u003erock_paper_scissors_game/game_player/submit_both_singleplayer_moves.cdc\u003c/code\u003e\n\u003col dir=\"auto\"\u003e\n\u003cli\u003e\u003ccode\u003ematchID: UInt64\u003c/code\u003e\u003c/li\u003e\n\u003cli\u003e\u003ccode\u003emove: UInt8\u003c/code\u003e - 0: rock, 1: paper, 2: scissors\u003c/li\u003e\n\u003c/ol\u003e\n\u003c/li\u003e\n\u003c/ul\u003e\n\u003cdiv class=\"snippet-clipboard-content notranslate position-relative overflow-auto\" data-snippet-clipboard-copy-content=\"flow transactions send transactions/rock_paper_scissors_game/game_player/submit_both_singleplayer_moves.cdc \u0026lt;MATCH_ID\u0026gt; \u0026lt;MOVE\u0026gt; --signer \u0026lt;YOUR_ACCOUNT_NAME\u0026gt; --network testnet\"\u003e\u003cpre class=\"notranslate\"\u003e\u003ccode\u003eflow transactions send transactions/rock_paper_scissors_game/game_player/submit_both_singleplayer_moves.cdc \u0026lt;MATCH_ID\u0026gt; \u0026lt;MOVE\u0026gt; --signer \u0026lt;YOUR_ACCOUNT_NAME\u0026gt; --network testnet\n\u003c/code\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003eResolve the Match \u0026amp; return your NFT. Note that resolution needs to occur at least one block from when the last move was submitted.\u003c/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\u003ccode\u003erock_paper_scissors_game/game_player/resolve_match_and_return_nfts.cdc\u003c/code\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\u003ccode\u003ematchID: UInt64\u003c/code\u003e\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/li\u003e\n\u003c/ul\u003e\n\u003cdiv class=\"snippet-clipboard-content notranslate position-relative overflow-auto\" data-snippet-clipboard-copy-content=\"flow transactions send transactions/rock_paper_scissors_game/game_player/resolve_match_and_return_nfts.cdc \u0026lt;MATCH_ID\u0026gt; --signer \u0026lt;YOUR_ACCOUNT_NAME\u0026gt; --network testnet\"\u003e\u003cpre class=\"notranslate\"\u003e\u003ccode\u003eflow transactions send transactions/rock_paper_scissors_game/game_player/resolve_match_and_return_nfts.cdc \u0026lt;MATCH_ID\u0026gt; --signer \u0026lt;YOUR_ACCOUNT_NAME\u0026gt; --network testnet\n\u003c/code\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003eQuery the moves played for the Match\u003c/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\u003ccode\u003erock_paper_scissors_game/get_match_move_history: {UInt64: RockPaperScissorsGame.SubmittedMove}?\u003c/code\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\u003ccode\u003ematchID: UInt64\u003c/code\u003e\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/li\u003e\n\u003c/ul\u003e\n\u003cdiv class=\"snippet-clipboard-content notranslate position-relative overflow-auto\" data-snippet-clipboard-copy-content=\"flow scripts execute scripts/rock_paper_scissors_game/get_match_move_history.cdc \u0026lt;MATCH_ID\u0026gt; --network testnet\"\u003e\u003cpre class=\"notranslate\"\u003e\u003ccode\u003eflow scripts execute scripts/rock_paper_scissors_game/get_match_move_history.cdc \u0026lt;MATCH_ID\u0026gt; --network testnet\n\u003c/code\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003eYou can additionally query your NFT's win/loss record\u003c/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\u003ccode\u003egame_piece_nft/get_rps_win_loss: GamingMetadataViews.BasicWinLoss?\u003c/code\u003e\n\u003col dir=\"auto\"\u003e\n\u003cli\u003e\u003ccode\u003eaddress: Address\u003c/code\u003e\u003c/li\u003e\n\u003cli\u003e\u003ccode\u003eid: UInt64\u003c/code\u003e\u003c/li\u003e\n\u003c/ol\u003e\n\u003c/li\u003e\n\u003c/ul\u003e\n\u003cdiv class=\"snippet-clipboard-content notranslate position-relative overflow-auto\" data-snippet-clipboard-copy-content=\"flow scripts execute scripts/game_piece_nft/get_rps_win_loss.cdc \u0026lt;YOUR_ADDRESS\u0026gt; \u0026lt;NFT_ID\u0026gt; --network testnet\"\u003e\u003cpre class=\"notranslate\"\u003e\u003ccode\u003eflow scripts execute scripts/game_piece_nft/get_rps_win_loss.cdc \u0026lt;YOUR_ADDRESS\u0026gt; \u0026lt;NFT_ID\u0026gt; --network testnet\n\u003c/code\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003c/li\u003e\n\u003c/ol\u003e\n\u003c/article\u003e","loaded":true,"timedOut":false,"errorMessage":null,"headerInfo":{"toc":[{"level":1,"text":"Rock Paper Scissors Onchain | (🪨 📃 ✂️) - ⛓️","anchor":"rock-paper-scissors-onchain----️---️","htmlText":"Rock Paper Scissors Onchain | (🪨 📃 ✂️) - ⛓️"},{"level":1,"text":"Overview","anchor":"overview","htmlText":"Overview"},{"level":2,"text":"Gameplay Overview","anchor":"gameplay-overview","htmlText":"Gameplay Overview"},{"level":2,"text":"Marketplace Overview","anchor":"marketplace-overview","htmlText":"Marketplace Overview"},{"level":1,"text":"Components","anchor":"components","htmlText":"Components"},{"level":2,"text":"Gaming","anchor":"gaming","htmlText":"Gaming"},{"level":2,"text":"Supporting","anchor":"supporting","htmlText":"Supporting"},{"level":2,"text":"Hybrid Custody","anchor":"hybrid-custody","htmlText":"Hybrid Custody"},{"level":2,"text":"Composition","anchor":"composition","htmlText":"Composition"},{"level":3,"text":"Considerations","anchor":"considerations","htmlText":"Considerations"},{"level":1,"text":"User Walkthrough","anchor":"user-walkthrough","htmlText":"User Walkthrough"},{"level":2,"text":"Onboarding","anchor":"onboarding","htmlText":"Onboarding"},{"level":3,"text":"Wallet-less Onboarding","anchor":"wallet-less-onboarding","htmlText":"Wallet-less Onboarding"},{"level":3,"text":"Blockchain-native Onboarding","anchor":"blockchain-native-onboarding","htmlText":"Blockchain-native Onboarding"},{"level":2,"text":"Gameplay","anchor":"gameplay","htmlText":"Gameplay"},{"level":2,"text":"Edge Case Resolution","anchor":"edge-case-resolution","htmlText":"Edge Case Resolution"},{"level":3,"text":"NFTs are escrowed, but the moves are never submitted","anchor":"nfts-are-escrowed-but-the-moves-are-never-submitted","htmlText":"NFTs are escrowed, but the moves are never submitted"},{"level":3,"text":"NFTs are escrowed, but player unlinks their Receiver Capability before the NFT could be returned","anchor":"nfts-are-escrowed-but-player-unlinks-their-receiver-capability-before-the-nft-could-be-returned","htmlText":"NFTs are escrowed, but player unlinks their Receiver Capability before the NFT could be returned"},{"level":3,"text":"Player provides a Receiver Capability that panics in its deposit() method","anchor":"player-provides-a-receiver-capability-that-panics-in-its-deposit-method","htmlText":"Player provides a Receiver Capability that panics in its deposit() method"},{"level":3,"text":"Player changes their mind after NFT escrow \u0026 before move submission","anchor":"player-changes-their-mind-after-nft-escrow--before-move-submission","htmlText":"Player changes their mind after NFT escrow \u0026amp; before move submission"},{"level":1,"text":"Demo on Emulator","anchor":"demo-on-emulator","htmlText":"Demo on Emulator"},{"level":2,"text":"Pre-Requisites","anchor":"pre-requisites","htmlText":"Pre-Requisites"},{"level":2,"text":"Walletless Demo Walkthrough","anchor":"walletless-demo-walkthrough","htmlText":"Walletless Demo Walkthrough"},{"level":3,"text":"Onboarding","anchor":"onboarding-1","htmlText":"Onboarding"},{"level":3,"text":"Gameplay","anchor":"gameplay-1","htmlText":"Gameplay"},{"level":3,"text":"Connect Wallet \u0026 Link Accounts","anchor":"connect-wallet--link-accounts","htmlText":"Connect Wallet \u0026amp; Link Accounts"},{"level":2,"text":"Blockchain-Native Onboarding Demo","anchor":"blockchain-native-onboarding-demo","htmlText":"Blockchain-Native Onboarding Demo"},{"level":3,"text":"Onboarding","anchor":"onboarding-2","htmlText":"Onboarding"},{"level":3,"text":"Minting TicketToken","anchor":"minting-tickettoken","htmlText":"Minting TicketToken"},{"level":3,"text":"Minting ArcadePrize.NFT","anchor":"minting-arcadeprizenft","htmlText":"Minting ArcadePrize.NFT"},{"level":1,"text":"Play Self-Custodied on Testnet","anchor":"play-self-custodied-on-testnet","htmlText":"Play Self-Custodied on Testnet"}],"siteNavLoginPath":"/login?return_to=https%3A%2F%2Fgithub.com%2Fonflow%2Fsc-eng-gaming"}},{"displayName":"CODE_OF_CONDUCT.md","repoName":"sc-eng-gaming","refName":"main","path":"CODE_OF_CONDUCT.md","preferredFileType":"code_of_conduct","tabName":"Code of 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d="M5.75 2.5h8.5a.75.75 0 0 1 0 1.5h-8.5a.75.75 0 0 1 0-1.5Zm0 5h8.5a.75.75 0 0 1 0 1.5h-8.5a.75.75 0 0 1 0-1.5Zm0 5h8.5a.75.75 0 0 1 0 1.5h-8.5a.75.75 0 0 1 0-1.5ZM2 14a1 1 0 1 1 0-2 1 1 0 0 1 0 2Zm1-6a1 1 0 1 1-2 0 1 1 0 0 1 2 0ZM2 4a1 1 0 1 1 0-2 1 1 0 0 1 0 2Z"></path></svg></button></div><div class="Box-sc-g0xbh4-0 QkQOb js-snippet-clipboard-copy-unpositioned undefined" data-hpc="true"><article class="markdown-body entry-content container-lg" itemprop="text"><div class="markdown-heading" dir="auto"><h1 tabindex="-1" class="heading-element" dir="auto">Rock Paper Scissors Onchain | (🪨 📃 ✂️) - ⛓️</h1><a id="user-content-rock-paper-scissors-onchain----️---️" class="anchor" aria-label="Permalink: Rock Paper Scissors Onchain | (🪨 📃 ✂️) - ⛓️" href="#rock-paper-scissors-onchain----️---️"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">This repo originated as an proof of concept onchain Rock Paper Scissors game as an exploration in blockchain gaming powered by <a href="https://developers.flow.com/cadence/intro" rel="nofollow">Cadence</a> on <a href="https://flow.com/" rel="nofollow">Flow</a>. Through that process, the UX hurdles faced by all onchain games - wallet onboarding, in-game transaction signing, etc. - revealed there was no way to create a meaningfully onchain game that was also user-friendly and permissionlessly composable. Consequently, this repo served as a sandbox to prototype <a href="https://flow.com/hybrid-custody" rel="nofollow">Hybrid Custody</a> and make <a href="https://developers.flow.com/concepts/account-linking" rel="nofollow">account linking</a> a reality.</p> <p dir="auto">The contents in this repo are the onchain components powering the <a href="https://walletless-arcade-game.vercel.app/" rel="nofollow">Walletless Arcade</a>.</p> <p dir="auto">In addition to onchain gaming, you'll find a number of novel Cadence implemenations including:</p> <ul dir="auto"> <li>🔗 Linked accounts</li> <li>📲 Walletless onboarding</li> <li>🏆 Dynamic NFTs</li> </ul> <details> <summary>Table of Contents</summary> <ul dir="auto"> <li><a href="#overview">Overview</a> <ul dir="auto"> <li><a href="#gameplay-overview">Gameplay Overview</a></li> </ul> </li> <li><a href="#components">Components</a> <ul dir="auto"> <li><a href="#summary">Summary</a></li> <li><a href="#gaming">Gaming</a></li> <li><a href="#linked-accounts">Linked Accounts</a></li> <li><a href="#supporting">Supporting</a></li> <li><a href="#composition">Composition</a></li> </ul> </li> <li><a href="#user-walkthrough">User Walkthrough</a> <ul dir="auto"> <li><a href="#onboarding">Onboarding</a> <ul dir="auto"> <li><a href="#wallet-less-onboarding">Wallet-less Onboarding</a></li> <li><a href="#blockchain-native-onboarding">Blockchain-Native Onboarding</a></li> </ul> </li> <li><a href="#gameplay">Gameplay</a></li> <li><a href="#edge-case-resolution">Edge Case Resolution</a></li> </ul> </li> <li><a href="#demo-on-emulator">Demo on Emulator</a> <ul dir="auto"> <li><a href="#pre-requisites">Pre-Requisites</a></li> <li><a href="#walletless-demo-walkthrough">Walletless Demo Walkthrough</a></li> <li><a href="#blockchain-native-onboarding-demo">Blockchain-Native Onboarding Demo</a></li> </ul> </li> </ul> </details> <hr> <div class="markdown-heading" dir="auto"><h1 tabindex="-1" class="heading-element" dir="auto">Overview</h1><a id="user-content-overview" class="anchor" aria-label="Permalink: Overview" href="#overview"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">As gaming makes its way into Web 3.0, bringing with it the next swath of mainstream users, we created this repo as a playground to develop proof of concept implementations that showcase the power of onchain games built with the Cadence resource-oriented programming language. Through this exploration, we discovered the importance of improving onboarding and reducing in-app UX friction, and so iterated our way to an initial <a href="https://flow.com/post/flow-blockchain-mainstream-adoption-easy-onboarding-wallets" rel="nofollow">hybrid custody model</a>. It's our hope that the work and exploration here uncovers unique design patterns that are useful towards composable game designs and, more broadly, novel custody models, helping to pave the way for a thriving community of developers building the best apps in the world on Flow.</p> <p dir="auto">For our first proof of concept game, we've created the <code>RockPaperScissorsGame</code> and supporting contract <code>GamingMetadataViews</code>.</p> <p dir="auto">As a learning ground for upcoming Cadence <a href="https://developers.flow.com/cadence/language/attachments#docusaurus_skipToContent_fallback" rel="nofollow">Attachments</a>, we wanted to demonstrate how NFT metadata could update with gameplay in an entirely separate contract than the NFT was defined. So we created <code>DynamicNFT</code> which contains interfaces for attachments & receivers for those attachments.</p> <p dir="auto">The attachment receiver portion of that model is implemented in <code>GamePieceNFT</code> (modeled heavily after <a href="https://github.com/onflow/monster-maker"><code>MonsterMaker</code></a>) and the attachments are implemented in <code>RockPaperScissorsGame</code>.</p> <p dir="auto">Taken together with any NFT implementing <code>DynamicNFT</code>, these contracts define an entirely onchain game with a dynamic NFT that accesses an ongoing record of its win/loss data.</p> <blockquote> <p dir="auto">ℹ️ While Hybrid Custody contracts & transactions are included in this repo, they're not critical to the core gameplay logic. It's recommended that readers focus on understanding the game-related contracts and components and layer on the process of account linking in the context of the application user flow.</p> </blockquote> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">Gameplay Overview</h2><a id="user-content-gameplay-overview" class="anchor" aria-label="Permalink: Gameplay Overview" href="#gameplay-overview"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">Players engage in single or two-player single round matches of RPS. After configuring their <code>GamePlayer</code> resource, users can start a match by escrowing a <code>GamePieceNFT</code>. The match is playable once both players have escrowed their NFTs (or after the first player to escrow if in single player mode). The escrowed NFT gets an attachment enabling retrieval of its win/loss record and another that maintains the playable moves for the game - rock, paper, and scissors, as expected.</p> <blockquote> <p dir="auto">ℹ️ NFTs are escrowed into matches to ensure the NFT provided is a) actually owned by the player and b) players can't bypass updates to their NFT's win/loss record.</p> </blockquote> <p dir="auto">Once playable, the match proceeds in stages - commit and resolve (to be replaced by a commit-reveal pattern to obfuscate onchain moves). Players must first commit their moves. After both players have submitted moves, the match can be resolved. On resolution, a winner is determined and the associated NFT's win/loss record is amended with the match results.</p> <p dir="auto">Of course, once the match is over (or if a timeout is reached without resolution) the escrowed NFTs can then be returned to their respective escrowing players.</p> <p dir="auto">Things get much more interesting when the onchain game is coupled with account linking - seen in <a href="https://walletless-arcade-game.vercel.app/" rel="nofollow">this demo</a> - allowing for embedded wallets to abstract transaction execution in-app while unlocking those in-app assets to be accessible by a user's primary wallet. To facilitate a fuller game experience in said app, <code>TicketToken</code> was introduced as a player reward for winning matches, just like you'd win in an real arcade!</p> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">Marketplace Overview</h2><a id="user-content-marketplace-overview" class="anchor" aria-label="Permalink: Marketplace Overview" href="#marketplace-overview"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">The accompanying <code>TicketToken</code> and <code>ArcadePrize</code> contracts aren't special in and of themselves - simple FT and NFT contracts. However, once a user links their wallet with the app account used to play the game - the account issued <code>TicketToken</code> when the player wins a match - the authenticated account is issued access to the app account. This link between accounts exists onchain and establishes what we'll call a "parent-child" hierarchy between user accounts where the user's wallet mediated account is the "parent" to the partitioned "child" account.</p> <blockquote> <p dir="auto">ℹ️ This setup introduces account models similar to Web2's app authorization into our decentralized Web3 context. Linked child accounts can be thought of as sub-accounts to the parent, allowing both the user <strong>and</strong> the custodial party (game app in this case) to maintain access on the app-managed account.</p> </blockquote> <p dir="auto">After linking, the user can authenticate in other unrelated apps with their wallet, and any app recognizing Hybrid Custody accounts can identify all associated child accounts, their contents, and facilitate transactions interacting with child-account custodied assets with a transaction signed by the parent account alone.</p> <p dir="auto">To demonstrate this, <code>ArcadePrize</code> accepts <code>TicketToken</code> redemption for minting NFTs. Redeeming FTs for NFTs isn't new, but the ability to sign a transaction with one account and, using delegated account access, acquire funds from another to mint an NFT to the signing account <strong>is</strong> new, and it solves an enormous problem in the Web3 app experience.</p> <div class="markdown-heading" dir="auto"><h1 tabindex="-1" class="heading-element" dir="auto">Components</h1><a id="user-content-components" class="anchor" aria-label="Permalink: Components" href="#components"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">Gaming</h2><a id="user-content-gaming" class="anchor" aria-label="Permalink: Gaming" href="#gaming"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <ul dir="auto"> <li> <p dir="auto"><strong>GamingMetadataViews</strong> - Defining the metadata structs relevant to an NFT's win/loss data and assigned moves as well as interfaces designed to be implemented as attachments for NFTs. These interfaces enable the implementing contracts to alter values associated with data on an NFT's attachments via limited access control, a useful feature for smart contract game development, among other use cases.</p> </li> <li> <p dir="auto"><strong>RockPaperScissorsGame</strong> - As you might imagine, this contract contains the game's moves, logic as well as resources and interfaces defining the rules of engagement in the course of a match. Additionally, receivers for Capabilities to matches are defined in <code>GamePlayer</code> resource and interfaces that allow players to create matches, be added and add others to matches, and engage with the matches they're in. The <code>Match</code> resource is defined as a single round of Rock, Paper, Scissors that can be played in either single or two player modes, with single-player modes randomizing the second player's move on a contract function call.</p> </li> </ul> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">Supporting</h2><a id="user-content-supporting" class="anchor" aria-label="Permalink: Supporting" href="#supporting"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <ul dir="auto"> <li><strong>DynamicNFT</strong> - This contract defines interfaces for attachments & resources which receive those attachments as nested resources as well as resolve metadata related those attachments.</li> <li><strong>GamePieceNFT</strong> - An example NFT implementation of <code>DynamicNFT</code>, <a href="https://monster-maker-web-client.vercel.app/" rel="nofollow">featuring png's seen elsewhere</a> in Flow demos, and used to demonstrate NFT escrow in <code>RockPaperScissorsGame</code> gameplay.</li> <li><strong>TicketToken</strong> - A simple FungibleToken implementation intended for use as redemption tokens in exchange for <code>ArcadePrize</code> NFTs</li> <li><strong>ArcadePrize</strong> - Another example implementation, this time of a NonFungibleToken. Minting requires <code>TicketToken</code> redemption. An interesting note, you can redeem</li> </ul> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">Hybrid Custody</h2><a id="user-content-hybrid-custody" class="anchor" aria-label="Permalink: Hybrid Custody" href="#hybrid-custody"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">Contracts enabling account linking are not critical to the gameplay, but layer nicely to create a smooth in-app experience. While understanding the Hybrid Custody contracts is useful, it's recommended you focus on understanding the game-related contracts and components before layering on these mental constructs if you're solely intersted in understanding the mechanics of the onchain gaming.</p> <blockquote> <p dir="auto">ℹ️ For more info on the parts making up <code>HybridCustody</code>, check out <a href="https://developers.flow.com/concepts/account-linking" rel="nofollow">these docs</a></p> </blockquote> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">Composition</h2><a id="user-content-composition" class="anchor" aria-label="Permalink: Composition" href="#composition"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">Taking a look at <code>RockPaperScissorsGame</code>, you'll see that it stands on its own - a user with any <code>DynamicNFT</code> can engage with the game to play single and multiplayer matches. The same goes for <code>TicketToken</code> and <code>GamePieceNFT</code> contracts in that they are independent components not necessarily designed to be used together.</p> <p dir="auto">Each set of contracts were created as composable building blocks and used together to create a unique app experience.</p> <p dir="auto"><code>HybridCustody</code> was layered on to solve both the app UX problem created by the current dichotomous app- v. self-custody paradigms and to give users access to in-app assets outside the context of the custodial app.</p> <div class="markdown-heading" dir="auto"><h3 tabindex="-1" class="heading-element" dir="auto">Considerations</h3><a id="user-content-considerations" class="anchor" aria-label="Permalink: Considerations" href="#considerations"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">Optimizing for openness and interoperability is not without its tradeoffs.</p> <p dir="auto">The game contract's use of any NFT maximizes composability, but it means that NFTs with the same ID cause collisions in the win/loss record mapping indexed on escrowed NFT IDs. This shouldn't be an issue for NFTs that assign ids on UUIDs, but users could experience a case where they effectively share a win/loss record with another NFT of the same ID. This could be handled by indexing on the hash of an NFT's ID along with its Type which should yield a unique value or alternatively, the NFTs UUID. The latter would be a harder ask as it's unlikely a requestor would have the NFT's UUID on hand if it's not already the equivalent to its ID. In the end, the contract indexes on UUID.</p> <p dir="auto">A bit of a note on best practices...it's evident that defining onchain game logic must involve adversarial thinking. For example, we could have (and did at one point) return NFTs from escrow on match resolution to remove the need for an additional function call. However, we discovered that a malicious player could technically prevent <code>Match</code> resolution (a custom <code>Receiver</code> could <code>panic</code> on <code>deposit()</code>). This along with the revelation that a malicious player could also assure game outcomes with the afforementioned post-condition on match results led us to the commit-resolve pattern you see in the contracts & transactions.</p> <hr> <div class="markdown-heading" dir="auto"><h1 tabindex="-1" class="heading-element" dir="auto">User Walkthrough</h1><a id="user-content-user-walkthrough" class="anchor" aria-label="Permalink: User Walkthrough" href="#user-walkthrough"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">With the context and components explained, we can more closely examine how they interact in an end-to-end user experience. For simplicity, we'll assume everything goes as it's designed and walk the happy path.</p> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">Onboarding</h2><a id="user-content-onboarding" class="anchor" aria-label="Permalink: Onboarding" href="#onboarding"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">With linked accounts, there are two ways a user can onboard.</p> <ul dir="auto"> <li> <p dir="auto">🌈 <strong>"Wallet-less" onboarding</strong> - First, a app can onboard a user with Web2 credentials, creating a Flow account for the user and abstracting away key management.</p> </li> <li> <p dir="auto">🔗 <strong>"Blockchain-native" onboarding flow</strong> - Second, a user native to the Flow ecosystem can connect their wallet and start the app experience with controll over the app account. In our version, the app will still abstract key management, but will additionally delegate control over the app account to the user's authenticated account via AuthAccount Capabilities.</p> </li> </ul> <div class="markdown-heading" dir="auto"><h3 tabindex="-1" class="heading-element" dir="auto">Wallet-less Onboarding</h3><a id="user-content-wallet-less-onboarding" class="anchor" aria-label="Permalink: Wallet-less Onboarding" href="#wallet-less-onboarding"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">After a user authenticates via some traditional Web2 authentication mechanism, the app initiates walletless onboarding</p> <ol dir="auto"> <li> <p dir="auto">A new public/private key pair is generated</p> </li> <li> <p dir="auto">Providing the generated public key, initial funding amount, and <code>MonsterComponent</code> NFT attributes, the walletless onboarding transaction starts by creating a new account from the signer's <code>AccountCreator</code> resource.</p> <p dir="auto"><g-emoji class="g-emoji" alias="warning">⚠️</g-emoji> Note that any old account creation mechanism can be used in your walletless onboarding flow, but this resource allowed us to query created addresses from custodied keys.</p> </li> <li> <p dir="auto">A <code>GamePieceNFT</code> Collection is configured in the new account</p> </li> <li> <p dir="auto">The signer mints a <code>GamePieceNFT</code> to the new account's Collection</p> </li> <li> <p dir="auto">A <code>GamePlayer</code> resource is configured in the new account so it can play <code>RockPaperScissorsGame.Match</code>es</p> </li> <li> <p dir="auto">A <code>TicketToken.Vault</code> is saved & linked in the new account</p> </li> </ol> <div class="markdown-heading" dir="auto"><h3 tabindex="-1" class="heading-element" dir="auto">Blockchain-native Onboarding</h3><a id="user-content-blockchain-native-onboarding" class="anchor" aria-label="Permalink: Blockchain-native Onboarding" href="#blockchain-native-onboarding"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">After a user's wallet has been connected, run the blockchain-native multisig onboarding transaction signed by both a developer account & the user. Note that this would require a backend account pre-configured with an <code>AccountCreator</code> & funded with FLOW to pay for new account creation, though account creation can be handled by many other mechanisms.</p> <p dir="auto">This onboarding transaction does the following.</p> <ol dir="auto"> <li>Given a generated public key (private key managed by the game dev), funding amount, a minter address, and hybrid custody filter & factory addresses</li> <li>Creates a new account & optionally funds it with $FLOW</li> <li>Configures the account with a <code>GamePieceNFT</code> Collection</li> <li>Configures the new account with a <code>GamePlayer</code> resource</li> <li>Sets up a <code>TicketToken</code> Vault in the new account</li> <li>Sets up <code>GamePieceNFT.Collection</code> in the user's connected account</li> <li>Sets up a <code>TicketToken.Vault</code> in the user's connected account</li> <li>Preps the new account to link to the signing user's account, setting up an <code>HybridCustody.OwnedAccount</code> resource in the new account</li> <li>Configures a <code>HybridCustody.Manager</code> in the user's account</li> <li>Mints a <code>GamePieceNFT</code> to the new account's <code>Collection</code></li> <li>Links the new account as a child of the user's account, saving a Capability on the child account in the user's <code>HybridCustody.Manager</code></li> </ol> <blockquote> <p dir="auto">ℹ️ The output of this transaction is a new account, custodied by the key provider, fully configured for gameplay, and linked to the signing user's account as a child account. <strong>Both</strong> the user <strong>and</strong> the application have access on the new account - the user via <code>HybridCustody</code> and the app via key custody.</p> </blockquote> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">Gameplay</h2><a id="user-content-gameplay" class="anchor" aria-label="Permalink: Gameplay" href="#gameplay"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <ul dir="auto"> <li> <details><summary>Single-Player Gameplay</summary> <ol dir="auto"> <li>Player creates a new match, escrowing their NFT along with their NFT <code>Receiver</code>. Note that match timeout is established on creation, which prevents the escrowed NFT from being retrieved during gameplay. <ul dir="auto"> <li><code>RPSAssignedMoves</code> and <code>RPSWinLossRetriever</code> are attached to their escrowed NFT if they are not already attached</li> </ul> </li> <li>Player submits their move</li> <li>Player calls for automated player's move to be submitted</li> <li>In a separate transaction (enforced by block height), player calls <code>resolveMatch()</code> to determine the outcome of the <code>Match</code> <ol dir="auto"> <li>The win/loss record is recorded for the player's NFT</li> <li>The win/loss record is recorded for the designated contract's <code>dummyNFTID</code></li> <li>The escrowed NFT is returned to the escrowing player</li> </ol> </li> <li>Player calls for escrowed NFT to be returned via <code>returnPlayersNFTs()</code>. Since the <code>Match</code> returns the escrowed NFTs directly via the given <code>Receiver</code> Capability, we made this a separate call to prevent malicious Capabilities from disallowing resolution. In this case, the worst a malicious Capability could do would be force the other player to call <code>retrieveUnclaimedNFT()</code> in order to have their NFT returned.</li> </ol> </details> </li> <li> <details><summary>Multi-Player Gameplay</summary> <ol dir="auto"> <li>Player one creates a new match, escrowing their NFT. Note that match timeout is established on creation, which prevents the escrowed NFT from being retrieved during gameplay. <ul dir="auto"> <li><code>RPSAssignedMoves</code> and <code>RPSWinLossRetriever</code> are attached to their escrowed NFT if they are not already attached</li> </ul> </li> <li>Player one adds <code>MatchLobbyActions</code> Capability to Player two's <code>GamePlayerPublic</code> <ol dir="auto"> <li>Player one gets <code>GamePlayerPublic</code> Capability from Player two</li> <li>Player one calls <code>addPlayerToMatch()</code> on their <code>GamePlayer</code>, passing the <code>matchID</code> and the reference to Player two's <code>GamePlayerPublic</code></li> </ol> </li> <li>Player two escrows their NFT into the match <ol dir="auto"> <li><code>RPSAssignedMoves</code> and <code>RPSWinLossRetriever</code> are attached to their escrowed NFT if they are not already attached</li> </ol> </li> <li>Each player submits their move</li> <li>After both moves have been submitted, any player can then call for match resolution <ol dir="auto"> <li>A winner is determined</li> <li>The win/loss records are recorded for each NFT</li> <li>Each NFT is returned to their respective owners</li> </ol> </li> <li>Any player calls for escrowed NFT to be returned via <code>returnPlayersNFTs()</code>. Since the <code>Match</code> returns the escrowed NFTs directly via the given <code>Receiver</code> Capability, we made this a separate call to prevent malicious Capabilities from disallowing resolution. In this case, the worst a malicious Capability could do would be to require that the other player call <code>retrieveUnclaimedNFT()</code> in a separate transaction to retrieve their singular NFT from escrow.</li> </ol> </details> </li> </ul> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">Edge Case Resolution</h2><a id="user-content-edge-case-resolution" class="anchor" aria-label="Permalink: Edge Case Resolution" href="#edge-case-resolution"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <div class="markdown-heading" dir="auto"><h3 tabindex="-1" class="heading-element" dir="auto"><strong>NFTs are escrowed, but the moves are never submitted</strong></h3><a id="user-content-nfts-are-escrowed-but-the-moves-are-never-submitted" class="anchor" aria-label="Permalink: NFTs are escrowed, but the moves are never submitted" href="#nfts-are-escrowed-but-the-moves-are-never-submitted"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">Since a match timeout is specified upon <code>Match</code> creation and retrieval of <code>NFT</code>s is contingent on either the timeout being reached or the <code>Match</code> no longer being in play, a player can easily retrieve their <code>NFT</code> after timeout by calling <code>returnPlayerNFTs()</code> on their <code>MatchPlayerActions</code> Capability.</p> <p dir="auto">Since this Capability is linked on the game contract account which (in an actual stakes environment) shouldn't have active keys, the user can be assured that the Capability will not be unlinked. Additionally, since the method deposits the <code>NFT</code> to the <code>Receiver</code> provided upon escrow, they can be assured that it will not be accessible to anyone else calling <code>returnPlayerNFTs()</code>.</p> <div class="markdown-heading" dir="auto"><h3 tabindex="-1" class="heading-element" dir="auto"><strong>NFTs are escrowed, but player unlinks their <code>Receiver</code> Capability before the NFT could be returned</strong></h3><a id="user-content-nfts-are-escrowed-but-player-unlinks-their-receiver-capability-before-the-nft-could-be-returned" class="anchor" aria-label="Permalink: NFTs are escrowed, but player unlinks their Receiver Capability before the NFT could be returned" href="#nfts-are-escrowed-but-player-unlinks-their-receiver-capability-before-the-nft-could-be-returned"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">In this edge case, the <code>Receiver</code> Capability provided upon escrowing would no longer be linked to the depositing player’s <code>Collection</code>. In this case, as long as the escrowing player still has their <code>GamePlayer</code>, they could call <code>retrieveUnclaimedNFT()</code>, providing a reference to their <code>GamePlayerID</code> and the <code>Receiver</code> they want their NFT returned to.</p> <div class="markdown-heading" dir="auto"><h3 tabindex="-1" class="heading-element" dir="auto"><strong>Player provides a Receiver Capability that panics in its deposit() method</strong></h3><a id="user-content-player-provides-a-receiver-capability-that-panics-in-its-deposit-method" class="anchor" aria-label="Permalink: Player provides a Receiver Capability that panics in its deposit() method" href="#player-provides-a-receiver-capability-that-panics-in-its-deposit-method"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">This wouldn't be encountered by the <code>Match</code> until <code>returnPlayerNFTs()</code> is called after match resolution. Depending on the order of the <code>Receiver</code> Capabilities in the <code>nftReceivers</code> mapping, this could prevent the other player from retrieving their NFT via that function. At that point, however, the winner & loser have been decided and the game is over (<code>inPlay == false</code>). The other player could then call <code>retrieveUnclaimedNFT()</code> to retrieve the NFT that the trolling Receiver was preventing from being returned.</p> <div class="markdown-heading" dir="auto"><h3 tabindex="-1" class="heading-element" dir="auto"><strong>Player changes their mind after NFT escrow & before move submission</strong></h3><a id="user-content-player-changes-their-mind-after-nft-escrow--before-move-submission" class="anchor" aria-label="Permalink: Player changes their mind after NFT escrow & before move submission" href="#player-changes-their-mind-after-nft-escrow--before-move-submission"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">In the event a player changes their mind after creating a match, they'd currently have to wait the length of timeout to call <code>returnPlayerNFTs()</code>. Changing this behavior is scoped as a future improvement to enable abandoning a match before initiating gameplay, likely only to be updated in singleplayer mode matches.</p> <hr> <div class="markdown-heading" dir="auto"><h1 tabindex="-1" class="heading-element" dir="auto">Demo on Emulator</h1><a id="user-content-demo-on-emulator" class="anchor" aria-label="Permalink: Demo on Emulator" href="#demo-on-emulator"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">To demo the functionality of this repo, clone it and follow the steps below by entering each command using <a href="https://github.com/onflow/flow-cli">Flow CLI</a> from the package root:</p> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">Pre-Requisites</h2><a id="user-content-pre-requisites" class="anchor" aria-label="Permalink: Pre-Requisites" href="#pre-requisites"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <ul dir="auto"> <li> <p dir="auto">Start the emulator & deploy the contracts</p> <ul dir="auto"> <li> <p dir="auto">In one terminal window, run:</p> <div class="highlight highlight-source-shell notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="flow emulator"><pre>flow emulator</pre></div> </li> <li> <p dir="auto">In another terminal window, run the setup script creating our accounts & deploying contracts:</p> <div class="highlight highlight-source-shell notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="sh setup.sh"><pre>sh setup.sh</pre></div> </li> <li> <p dir="auto">Lastly, a HybridCustody pre-requisite includes setting up a Capability <code>Filter</code> and Capability Factory <code>Manager</code>. These ensure that parent account access is scoped to just the Capabilities they need to interact with the assets we as the developer want them to access. For more info on <code>CapabilityFilter</code> & <code>CapabilityFactory</code>, read <a href="https://developers.flow.com/concepts/hybrid-custody/guides/linking-accounts#pre-requisites" rel="nofollow">these docs</a>.</p> <div class="highlight highlight-source-shell notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="flow transactions send ./transactions/hybrid_custody/dev_setup/setup_filter_and_factory_manager.cdc \ 045a1763c93006ca GamePieceNFT 045a1763c93006ca TicketToken --signer emulator-game"><pre>flow transactions send ./transactions/hybrid_custody/dev_setup/setup_filter_and_factory_manager.cdc \ 045a1763c93006ca GamePieceNFT 045a1763c93006ca TicketToken --signer emulator-game</pre></div> </li> </ul> </li> </ul> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">Walletless Demo Walkthrough</h2><a id="user-content-walletless-demo-walkthrough" class="anchor" aria-label="Permalink: Walletless Demo Walkthrough" href="#walletless-demo-walkthrough"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <div class="markdown-heading" dir="auto"><h3 tabindex="-1" class="heading-element" dir="auto">Onboarding</h3><a id="user-content-onboarding-1" class="anchor" aria-label="Permalink: Onboarding" href="#onboarding-1"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <ol dir="auto"> <li> <p dir="auto">Generate public/private key pair</p> <div class="highlight highlight-source-shell notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="flow keys generate"><pre>flow keys generate</pre></div> </li> <li> <p dir="auto">Initialize walletless onboarding</p> <ul dir="auto"> <li><code>onboarding/walletless_onboarding</code> <ol dir="auto"> <li><code>pubKey: String,</code></li> <li><code>fundingAmt: UFix64,</code></li> <li><code>monsterBackground: Int,</code></li> <li><code>monsterHead: Int,</code></li> <li><code>monsterTorso: Int,</code></li> <li><code>monsterLeg: Int</code></li> </ol> </li> </ul> <div class="highlight highlight-source-shell notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="flow transactions send transactions/onboarding/walletless_onboarding.cdc <PUBLIC_KEY> <FUNDING_AMT> <BACKGROUND> <HEAD> <TORSO> <LEG> --signer emulator-game"><pre>flow transactions send transactions/onboarding/walletless_onboarding.cdc <span class="pl-k"><</span>PUBLIC_KEY<span class="pl-k">></span> <span class="pl-k"><</span>FUNDING_AMT<span class="pl-k">></span> <span class="pl-k"><</span>BACKGROUND<span class="pl-k">></span> <span class="pl-k"><</span>HEAD<span class="pl-k">></span> <span class="pl-k"><</span>TORSO<span class="pl-k">></span> <span class="pl-k"><</span>LEG<span class="pl-k">></span> --signer emulator-game</pre></div> </li> <li> <p dir="auto">Query for new account address from public key</p> <ul dir="auto"> <li><code>child_account/get_child_address_from_public_key_on_creator: Address</code> <ol dir="auto"> <li><code>creatorAddress: Address</code></li> <li><code>pubKey: String</code></li> </ol> </li> </ul> <div class="highlight highlight-source-shell notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="flow scripts execute scripts/account_creator/get_address_from_pub_key.cdc 045a1763c93006ca <PUBLIC_KEY>"><pre>flow scripts execute scripts/account_creator/get_address_from_pub_key.cdc 045a1763c93006ca <span class="pl-k"><</span>PUBLIC_KEY<span class="pl-k">></span></pre></div> </li> <li> <p dir="auto">Add the child account to your flow.json (assuming following along on flow-cli)</p> <div class="highlight highlight-source-json notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content=""accounts": { "emulator-account": { "address": "f8d6e0586b0a20c7", "key": "<EMULATOR_ACCOUNT_PRIVATE_KEY>" }, "child": { "address": "01cf0e2f2f715450", "key": "<CHILD_PRIVATE_KEY>" } }"><pre><span class="pl-ent">"accounts"</span>: { <span class="pl-ent">"emulator-account"</span>: { <span class="pl-ent">"address"</span>: <span class="pl-s"><span class="pl-pds">"</span>f8d6e0586b0a20c7<span class="pl-pds">"</span></span>, <span class="pl-ent">"key"</span>: <span class="pl-s"><span class="pl-pds">"</span><EMULATOR_ACCOUNT_PRIVATE_KEY><span class="pl-pds">"</span></span> }, <span class="pl-ent">"child"</span>: { <span class="pl-ent">"address"</span>: <span class="pl-s"><span class="pl-pds">"</span>01cf0e2f2f715450<span class="pl-pds">"</span></span>, <span class="pl-ent">"key"</span>: <span class="pl-s"><span class="pl-pds">"</span><CHILD_PRIVATE_KEY><span class="pl-pds">"</span></span> } }</pre></div> </li> </ol> <div class="markdown-heading" dir="auto"><h3 tabindex="-1" class="heading-element" dir="auto">Gameplay</h3><a id="user-content-gameplay-1" class="anchor" aria-label="Permalink: Gameplay" href="#gameplay-1"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <ol dir="auto"> <li> <p dir="auto">Query for <code>NFT.id</code></p> <ul dir="auto"> <li><code>game_piece_nft/get_collection_ids: [UInt64]</code> <ul dir="auto"> <li><code>address: Address</code></li> </ul> </li> </ul> <div class="highlight highlight-source-shell notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="flow scripts execute scripts/game_piece_nft/get_collection_ids.cdc <CHILD_ADDRESS>"><pre>flow scripts execute scripts/game_piece_nft/get_collection_ids.cdc <span class="pl-k"><</span>CHILD_ADDRESS<span class="pl-k">></span></pre></div> </li> <li> <p dir="auto">Query for <code>GamePlayer.id</code></p> <ul dir="auto"> <li><code>rock_paper_scissors_game/get_game_player_id: UInt64</code> <ul dir="auto"> <li><code>playerAddress: Address</code></li> </ul> </li> </ul> <div class="highlight highlight-source-shell notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="flow scripts execute scripts/rock_paper_scissors_game/get_game_player_id.cdc <CHILD_ADDRESS>"><pre>flow scripts execute scripts/rock_paper_scissors_game/get_game_player_id.cdc <span class="pl-k"><</span>CHILD_ADDRESS<span class="pl-k">></span></pre></div> </li> <li> <p dir="auto">Setup a new singleplayer <code>Match</code></p> <ul dir="auto"> <li><code>rock_paper_scissors_game/game_player/setup_new_singleplayer_match</code> <ol dir="auto"> <li><code>submittingNFTID: UInt64</code></li> <li><code>matchTimeLimitInMinutes: UInt</code></li> </ol> </li> </ul> <div class="highlight highlight-source-shell notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="flow transactions send transactions/rock_paper_scissors_game/game_player/setup_new_singleplayer_match.cdc <NFT_ID> <TIME_LIMIT> --signer child"><pre>flow transactions send transactions/rock_paper_scissors_game/game_player/setup_new_singleplayer_match.cdc <span class="pl-k"><</span>NFT_ID<span class="pl-k">></span> <span class="pl-k"><</span>TIME_LIMIT<span class="pl-k">></span> --signer child</pre></div> </li> <li> <p dir="auto">Query <code>Match.id</code></p> <ol dir="auto"> <li>Listen for <code>NewMatchCreated</code> event filtered on <code>creatorID == GamePlayer.id</code></li> <li><code>rock_paper_scissors_game/get_matches_in_play: [UInt64]</code> <ul dir="auto"> <li><code>address: Address</code></li> </ul> </li> </ol> <div class="highlight highlight-source-shell notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="flow scripts execute scripts/rock_paper_scissors_game/get_matches_in_play.cdc <CHILD_ADDRESS>"><pre>flow scripts execute scripts/rock_paper_scissors_game/get_matches_in_play.cdc <span class="pl-k"><</span>CHILD_ADDRESS<span class="pl-k">></span></pre></div> </li> <li> <p dir="auto">Submit moves for the <code>Match</code></p> <ul dir="auto"> <li><code>rock_paper_scissors_game/game_player/submit_both_singleplayer_moves</code> <ol dir="auto"> <li><code>matchID: UInt64</code></li> <li><code>move: UInt8</code></li> </ol> </li> </ul> <div class="highlight highlight-source-shell notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="flow transactions send transactions/rock_paper_scissors_game/game_player/submit_both_singleplayer_moves.cdc <MATCH_ID> <MOVE> --signer child"><pre>flow transactions send transactions/rock_paper_scissors_game/game_player/submit_both_singleplayer_moves.cdc <span class="pl-k"><</span>MATCH_ID<span class="pl-k">></span> <span class="pl-k"><</span>MOVE<span class="pl-k">></span> --signer child</pre></div> </li> <li> <p dir="auto">Resolve <code>Match</code> & return escrowed NFTs</p> <ul dir="auto"> <li><code>rock_paper_scissors_game/game_player/resolve_match_and_return_nfts</code> <ul dir="auto"> <li><code>matchID: UInt64</code></li> </ul> </li> </ul> <div class="highlight highlight-source-shell notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="flow transactions send transactions/rock_paper_scissors_game/game_player/resolve_match_and_return_nfts.cdc <MATCH_ID> --signer child"><pre>flow transactions send transactions/rock_paper_scissors_game/game_player/resolve_match_and_return_nfts.cdc <span class="pl-k"><</span>MATCH_ID<span class="pl-k">></span> --signer child</pre></div> </li> <li> <p dir="auto">Query move history for both players one of a number of ways:</p> <ol dir="auto"> <li> <p dir="auto">Listen for <code>MatchOver</code> event filtered on <code>matchID == Match.id</code> and map user’s <code>GamePlayer.id</code> to <code>player1ID</code> or <code>player2ID</code> in the event values, displaying the <code>player1MoveRawValue</code> and <code>player2MoveRawValue</code> as appropriate</p> </li> <li> <p dir="auto"><code>rock_paper_scissors_game/get_match_move_history: {UInt64: RockPaperScissorsGame.SubmittedMove}?</code></p> <ul dir="auto"> <li><code>matchID: UInt64</code></li> </ul> <div class="highlight highlight-source-shell notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="flow scripts execute scripts/rock_paper_scissors_game/get_match_move_history.cdc <MATCH_ID>"><pre>flow scripts execute scripts/rock_paper_scissors_game/get_match_move_history.cdc <span class="pl-k"><</span>MATCH_ID<span class="pl-k">></span></pre></div> </li> <li> <p dir="auto"><code>rock_paper_scissors_game/get_match_move_history_as_raw_values: {UInt64: UInt8}?</code></p> <ul dir="auto"> <li><code>matchID: UInt64</code></li> </ul> <div class="highlight highlight-source-shell notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="flow scripts execute scripts/rock_paper_scissors_game/get_match_move_history_as_raw_values.cdc <MATCH_ID>"><pre>flow scripts execute scripts/rock_paper_scissors_game/get_match_move_history_as_raw_values.cdc <span class="pl-k"><</span>MATCH_ID<span class="pl-k">></span></pre></div> </li> </ol> </li> <li> <p dir="auto">Query player’s NFT win/loss record</p> <ul dir="auto"> <li> <p dir="auto"><code>game_piece_nft/get_rps_win_loss: GamingMetadataViews.BasicWinLoss?</code></p> <ol dir="auto"> <li><code>address: Address</code></li> <li><code>id: UInt64</code></li> </ol> <div class="highlight highlight-source-shell notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="flow scripts execute scripts/game_piece_nft/get_rps_win_loss.cdc <CHILD_ADDRESS> <NFT_ID>"><pre>flow scripts execute scripts/game_piece_nft/get_rps_win_loss.cdc <span class="pl-k"><</span>CHILD_ADDRESS<span class="pl-k">></span> <span class="pl-k"><</span>NFT_ID<span class="pl-k">></span></pre></div> </li> </ul> </li> </ol> <div class="markdown-heading" dir="auto"><h3 tabindex="-1" class="heading-element" dir="auto">Connect Wallet & Link Accounts</h3><a id="user-content-connect-wallet--link-accounts" class="anchor" aria-label="Permalink: Connect Wallet & Link Accounts" href="#connect-wallet--link-accounts"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">There are two ways to go about this process. One involves a multi-signature transaction where both the existing app account (soon to be “child” account) and the user’s main account (soon to be “parent” account) sign a transaction in which all changes are made. Another approach is to have the app account sign a transaction publishing its AuthAccount capability to then be claimed by the user’s account in a subsequent transaction.</p> <p dir="auto">For both the following transaction, you'll want to create an account if following along in flow-cli</p> <div class="highlight highlight-source-shell notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="flow accounts create # account name: parent | network: emulator"><pre>flow accounts create <span class="pl-c"><span class="pl-c">#</span> account name: parent | network: emulator</span></pre></div> <blockquote> <p dir="auto">ℹ️ Depending on your use case and custodial architecture, you may find it easier to configure publish & claim; however, both linking modalities are included for illustration.</p> </blockquote> <details> <summary>Publish & Claim</summary> <p dir="auto">This process leverages the <a href="https://developers.flow.com/cadence/language/accounts#account-inbox" rel="nofollow">account <code>Inbox</code></a> and involves two steps:</p> <ol dir="auto"> <li><a href="/onflow/sc-eng-gaming/blob/main/transactions/hybrid_custody/setup_owned_account_and_publish_to_parent.cdc">Publish</a></li> <li><a href="/onflow/sc-eng-gaming/blob/main/transactions/hybrid_custody/redeem_account.cdc">Claim</a></li> </ol> <p dir="auto">The app-custodied account sends the first transaction, configuring itself with <code>HybridCustody</code> constructs and publishing a <code>ChildAccoun</code> Capability for the specified parent account. The user subsequently sends another transaction, claiming the published Capability and storing it in a <code>HybridCustody.Manager</code> (configuring one if needed).</p> <ul dir="auto"> <li> <p dir="auto">Configure the app-custodied account as a child account & publish a capability on the account for the given parent account to claim</p> <ol dir="auto"> <li><code>parent: Address</code></li> <li><code>factoryAddress: Address</code></li> <li><code>filterAddress: Address</code></li> </ol> <div class="highlight highlight-source-shell notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="flow transactions send transactions/hybrid_custody/setup_owned_account_and_publish_to_parent.cdc <PARENT_ADDRESS> 0x045a1763c93006ca 0x045a1763c93006ca --signer child"><pre>flow transactions send transactions/hybrid_custody/setup_owned_account_and_publish_to_parent.cdc <span class="pl-k"><</span>PARENT_ADDRESS<span class="pl-k">></span> 0x045a1763c93006ca 0x045a1763c93006ca --signer child</pre></div> </li> <li> <p dir="auto">Claim the published <code>ChildAccount</code> Capability & store in the signing parent account's <code>Manager</code></p> <ul dir="auto"> <li><code>childAddress: Address</code></li> </ul> <div class="highlight highlight-source-shell notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="flow transactions send transactions/hybrid_custody/redeem_account.cdc <CHILD_ADDRESS> --signer parent"><pre>flow transactions send transactions/hybrid_custody/redeem_account.cdc <span class="pl-k"><</span>CHILD_ADDRESS<span class="pl-k">></span> --signer parent</pre></div> </li> </ul> </details> <details> <summary>Multi-Sign</summary> <p dir="auto">This process condenses the publish & claim path into a single transaction signed by both the parent and child accounts. In this transaction, a <code>HybridCustody.Manager</code> is configured in the user’s main account, capturing the app account’s <code>ChildAccount</code> capability in said <code>Manager</code>. The signing parent account is also configured with <code>GamePieceNFT.Collection</code> and <code>TicketToken.Vault</code> so each asset can be easily transferred between accounts.</p> <ul dir="auto"> <li> <p dir="auto">Both accounts sign the transaction, linking both accounts as parent-child and accomplishing Hybrid Custody.</p> <ol dir="auto"> <li><code>childAccountFactoryAddress: Address</code></li> <li><code>childAccountFilterAddress: Address</code></li> </ol> <div class="highlight highlight-source-shell notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="flow transactions build transactions/hybrid_custody/add_account_multi_sign.cdc \ 0x045a1763c93006ca 0x045a1763c93006ca \ --proposer parent --payer parent --authorizer parent --authorizer child \ --filter payload --save add_account_multi_sign.rlp"><pre>flow transactions build transactions/hybrid_custody/add_account_multi_sign.cdc \ 0x045a1763c93006ca 0x045a1763c93006ca \ --proposer parent --payer parent --authorizer parent --authorizer child \ --filter payload --save add_account_multi_sign.rlp</pre></div> <div class="highlight highlight-source-shell notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="flow transactions sign add_as_child_multisig --signer parent --signer child --filter payload --save add_account_multi_sign.rlp"><pre>flow transactions sign add_as_child_multisig --signer parent --signer child --filter payload --save add_account_multi_sign.rlp</pre></div> <div class="highlight highlight-source-shell notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="flow transactions send-signed add_account_multi_sign.rlp"><pre>flow transactions send-signed add_account_multi_sign.rlp</pre></div> </li> </ul> </details> <p dir="auto">At the end of either process, the two accounts are linked by resource representation onchain and both are configured such that the app has all it needs to play the game on behalf of the player. The user’s main account (AKA parent account) maintains a Capability on the app account (AKA child account) via <code>HybridCustody</code> components, allowing the player to access in-app assets while the app maintains signing authority on behalf of the user when playing in-game.</p> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">Blockchain-Native Onboarding Demo</h2><a id="user-content-blockchain-native-onboarding-demo" class="anchor" aria-label="Permalink: Blockchain-Native Onboarding Demo" href="#blockchain-native-onboarding-demo"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> 🔔 Reminder to fulfill pre-requisites from above <div class="markdown-heading" dir="auto"><h3 tabindex="-1" class="heading-element" dir="auto">Onboarding</h3><a id="user-content-onboarding-2" class="anchor" aria-label="Permalink: Onboarding" href="#onboarding-2"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <ol dir="auto"> <li> <p dir="auto">Generate public/private key pair</p> <div class="highlight highlight-source-shell notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="flow keys generate"><pre>flow keys generate</pre></div> </li> <li> <p dir="auto">Initialize blockchain-native onboarding, signing as both the authenticated user and the application's backend account.</p> <ul dir="auto"> <li> <p dir="auto"><code>onboarding/blockchain_native_onboarding</code></p> <ol dir="auto"> <li><code>pubKey: String</code></li> <li><code>fundingAmt: UFix64</code></li> <li><code>factoryAddress: Address</code></li> <li><code>filterAddress: Address</code></li> <li><code>minterAddress: Address</code></li> </ol> <g-emoji class="g-emoji" alias="warning">⚠️</g-emoji> Note: If you’re using `flow-cli`, you’ll want to add the created account as `“child”` to your `flow.json` before continuing. This is similar to the same step in walletless onboarding above </li> </ul> <div class="highlight highlight-source-shell notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="flow transactions execute transactions/onboarding/blockchain_native_onboarding.cdc \ <PUBLIC_KEY> 0.5 0x045a1763c93006ca 0x045a1763c93006ca 0x045a1763c93006ca \ --proposer emulator-game --payer emulator-game --authorizer parent --authorizer emulator-game \ --filter payload --save blockchain_native_onboarding.rlp"><pre>flow transactions execute transactions/onboarding/blockchain_native_onboarding.cdc \ <span class="pl-k"><</span>PUBLIC_KEY<span class="pl-k">></span> 0.5 0x045a1763c93006ca 0x045a1763c93006ca 0x045a1763c93006ca \ --proposer emulator-game --payer emulator-game --authorizer parent --authorizer emulator-game \ --filter payload --save blockchain_native_onboarding.rlp</pre></div> <div class="highlight highlight-source-shell notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="flow transactions sign blockchain_native_onboarding.rlp --signer parent --signer emulator-game --filter payload --save blockchain_native_onboarding.rlp"><pre>flow transactions sign blockchain_native_onboarding.rlp --signer parent --signer emulator-game --filter payload --save blockchain_native_onboarding.rlp</pre></div> <div class="highlight highlight-source-shell notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="flow transactions send-signed blockchain_native_onboarding.rlp"><pre>flow transactions send-signed blockchain_native_onboarding.rlp</pre></div> </li> <li> <p dir="auto">Query for new account address from public key</p> <ul dir="auto"> <li><code>account_creator/get_address_from_pub_key.cdc</code> <ol dir="auto"> <li><code>creatorAddress: Address</code></li> <li><code>pubKey: String</code></li> </ol> </li> </ul> <div class="highlight highlight-source-shell notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="flow scripts execute scripts/account_creator/get_address_from_pub_key.cdc 045a1763c93006ca <PUBLIC_KEY>"><pre>flow scripts execute scripts/account_creator/get_address_from_pub_key.cdc 045a1763c93006ca <span class="pl-k"><</span>PUBLIC_KEY<span class="pl-k">></span></pre></div> </li> </ol> <div class="markdown-heading" dir="auto"><h3 tabindex="-1" class="heading-element" dir="auto">Minting TicketToken</h3><a id="user-content-minting-tickettoken" class="anchor" aria-label="Permalink: Minting TicketToken" href="#minting-tickettoken"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">Based on Match results (queried above in <code>game_piece_nft/get_rps_win_loss</code>) and checked against the user's <code>GamePlayer.id</code> (queried in <code>rock_paper_scissors_game/get_game_player_id</code>), we’ll want to mint tokens to the child account’s <code>TicketToken.Vault</code>. These tokens can be redeemed for an <code>ArcadePrize.NFT</code> later in the demo.</p> <ol dir="auto"> <li> <p dir="auto">Mint tokens to the player’s app account</p> <ul dir="auto"> <li> <p dir="auto"><code>ticket_token/mint_tokens</code></p> <ol dir="auto"> <li><code>recipient: Address</code></li> <li><code>amount: UFix64</code></li> </ol> <div class="highlight highlight-source-shell notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="flow transactions send transactions/ticket_token/mint_tokens.cdc <CHILD_ADDRESS> <AMOUNT>"><pre>flow transactions send transactions/ticket_token/mint_tokens.cdc <span class="pl-k"><</span>CHILD_ADDRESS<span class="pl-k">></span> <span class="pl-k"><</span>AMOUNT<span class="pl-k">></span></pre></div> </li> </ul> </li> <li> <p dir="auto">Query the balance of tokens in the account</p> <ul dir="auto"> <li><code>ticket_token/get_balance: UFix64</code> - panics if Vault is not configured <ul dir="auto"> <li><code>of: Address</code></li> </ul> </li> </ul> <div class="highlight highlight-source-shell notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="flow scripts execute scripts/ticket_token/get_balance.cdc <CHILD_ADDRESS>"><pre>flow scripts execute scripts/ticket_token/get_balance.cdc <span class="pl-k"><</span>CHILD_ADDRESS<span class="pl-k">></span></pre></div> </li> </ol> <div class="markdown-heading" dir="auto"><h3 tabindex="-1" class="heading-element" dir="auto">Minting ArcadePrize.NFT</h3><a id="user-content-minting-arcadeprizenft" class="anchor" aria-label="Permalink: Minting ArcadePrize.NFT" href="#minting-arcadeprizenft"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">In this section, we’ll use the TicketToken.Vault in the child account to pay for an NFT to the signing account’s Collection. This serves as an example for how a app can present and utilize the assets in a connected account’s child account(s), creating a seamless experience compared to the fragmented UX previously inherent to isolated app accounts.</p> <ol dir="auto"> <li> <p dir="auto">Query for the TicketToken.Vault.balance in each of the user’s child accounts</p> <ol dir="auto"> <li> <p dir="auto"><code>ticket_token/get_all_account_balances_from_storage: {Address: UFix64}</code></p> <ul dir="auto"> <li><code>parentAddress: Address</code></li> </ul> <div class="highlight highlight-source-shell notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="flow scripts execute scripts/ticket_token/get_balance_of_all_child_accounts.cdc <PARENT_ADDRESS>"><pre>flow scripts execute scripts/ticket_token/get_balance_of_all_child_accounts.cdc <span class="pl-k"><</span>PARENT_ADDRESS<span class="pl-k">></span></pre></div> </li> <li> <p dir="auto"><code>hybrid_custody/get_all_vault_bal_from_storage: {Address: {Type: UFix64}}</code></p> <ul dir="auto"> <li><code>address: Address</code></li> </ul> <div class="highlight highlight-source-shell notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="flow scripts execute scripts/hybrid_custody/get_all_vault_bal_from_storage.cdc <PARENT_ADDRESS>"><pre>flow scripts execute scripts/hybrid_custody/get_all_vault_bal_from_storage.cdc <span class="pl-k"><</span>PARENT_ADDRESS<span class="pl-k">></span></pre></div> <div class="highlight highlight-source-cadence notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="// Where VaultInfo has the following interface pub struct VaultInfo { pub let name: String? pub let symbol: String? pub var balance: UFix64 pub let description: String? pub let externalURL: String? pub let logos: MetadataViews.Medias? pub let storagePathIdentifier: String pub let receiverPathIdentifier: String? pub let providerPathIdentifier: String? pub fun addBalance(_ addition: UFix64) }"><pre><span class="pl-c"><span class="pl-c">//</span> Where VaultInfo has the following interface</span> <span class="pl-c"></span><span class="pl-k">pub</span> <span class="pl-k">struct</span> <span class="pl-en">VaultInfo</span> { <span class="pl-k">pub</span> <span class="pl-k">let</span> <span class="pl-en">name</span>: <span class="pl-k">String</span>? <span class="pl-k">pub</span> <span class="pl-k">let</span> <span class="pl-en">symbol</span>: <span class="pl-k">String</span>? <span class="pl-k">pub</span> <span class="pl-k">var</span> <span class="pl-en">balance</span>: <span class="pl-k">UFix64</span> <span class="pl-k">pub</span> <span class="pl-k">let</span> <span class="pl-en">description</span>: <span class="pl-k">String</span>? <span class="pl-k">pub</span> <span class="pl-k">let</span> <span class="pl-en">externalURL</span>: <span class="pl-k">String</span>? <span class="pl-k">pub</span> <span class="pl-k">let</span> <span class="pl-en">logos</span>: <span class="pl-k">MetadataViews</span>.<span class="pl-k">Medias</span>? <span class="pl-k">pub</span> <span class="pl-k">let</span> <span class="pl-en">storagePathIdentifier</span>: <span class="pl-k">String</span> <span class="pl-k">pub</span> <span class="pl-k">let</span> <span class="pl-en">receiverPathIdentifier</span>: <span class="pl-k">String</span>? <span class="pl-k">pub</span> <span class="pl-k">let</span> <span class="pl-en">providerPathIdentifier</span>: <span class="pl-k">String</span>? <span class="pl-k">pub</span> <span class="pl-k">fun</span> <span class="pl-en">addBalance</span>(<span class="pl-en">_</span> <span class="pl-smi">addition</span>: <span class="pl-k">UFix64</span>) }</pre></div> </li> </ol> </li> <li> <p dir="auto">Query for all publicly accessible NFTs in the connected account & its child accounts</p> <ul dir="auto"> <li><code>hybrid_custody/get_all_nft_display_views_from_storage: [NFTData]</code> <ul dir="auto"> <li><code>address: Address</code></li> </ul> </li> </ul> <div class="highlight highlight-source-shell notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="flow scripts execute scripts/hybrid_custody/get_all_nft_display_views_from_storage.cdc <PARENT_ADDRESS>"><pre>flow scripts execute scripts/hybrid_custody/get_all_nft_display_views_from_storage.cdc <span class="pl-k"><</span>PARENT_ADDRESS<span class="pl-k">></span></pre></div> <div class="highlight highlight-source-cadence notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="// Where NFTData has the following interface pub struct NFTData { pub let name: String pub let description: String pub let thumbnail: String pub let resourceID: UInt64 pub let ownerAddress: Address? pub let collectionName: String pub let collectionDescription: String pub let collectionURL: String pub let collectionStoragePathIdentifier: String? pub let collectionPublicPathIdentifier: String }"><pre><span class="pl-c"><span class="pl-c">//</span> Where NFTData has the following interface</span> <span class="pl-c"></span><span class="pl-k">pub</span> <span class="pl-k">struct</span> <span class="pl-en">NFTData</span> { <span class="pl-k">pub</span> <span class="pl-k">let</span> <span class="pl-en">name</span>: <span class="pl-k">String</span> <span class="pl-k">pub</span> <span class="pl-k">let</span> <span class="pl-en">description</span>: <span class="pl-k">String</span> <span class="pl-k">pub</span> <span class="pl-k">let</span> <span class="pl-en">thumbnail</span>: <span class="pl-k">String</span> <span class="pl-k">pub</span> <span class="pl-k">let</span> <span class="pl-en">resourceID</span>: <span class="pl-k">UInt64</span> <span class="pl-k">pub</span> <span class="pl-k">let</span> <span class="pl-en">ownerAddress</span>: <span class="pl-k">Address</span>? <span class="pl-k">pub</span> <span class="pl-k">let</span> <span class="pl-en">collectionName</span>: <span class="pl-k">String</span> <span class="pl-k">pub</span> <span class="pl-k">let</span> <span class="pl-en">collectionDescription</span>: <span class="pl-k">String</span> <span class="pl-k">pub</span> <span class="pl-k">let</span> <span class="pl-en">collectionURL</span>: <span class="pl-k">String</span> <span class="pl-k">pub</span> <span class="pl-k">let</span> <span class="pl-en">collectionStoragePathIdentifier</span>: <span class="pl-k">String</span>? <span class="pl-k">pub</span> <span class="pl-k">let</span> <span class="pl-en">collectionPublicPathIdentifier</span>: <span class="pl-k">String</span> }</pre></div> </li> <li> <p dir="auto">Mint a rainbow duck for 10.0 TicketTokens, redeeming the TicketTokens in the user’s child account & minting to the signer’s Collection</p> <ul dir="auto"> <li><code>arcade_prize/mint_rainbow_duck_paying_with_child_vault</code> <ol dir="auto"> <li><code>fundingChildAddress: Address</code></li> <li><code>minterAddress: Address</code></li> </ol> </li> </ul> <div class="highlight highlight-source-shell notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="flow transactions send transactions/arcade_prize/mint_rainbow_duck_paying_with_child_vault.cdc <CHILD_ADDRESS> 045a1763c93006ca --signer parent"><pre>flow transactions send transactions/arcade_prize/mint_rainbow_duck_paying_with_child_vault.cdc <span class="pl-k"><</span>CHILD_ADDRESS<span class="pl-k">></span> 045a1763c93006ca --signer parent</pre></div> </li> <li> <p dir="auto">Again query for all publicly accessible NFTs in the connected account & its child accounts to see the NFT that was minted among all of the user’s owned NFTs</p> <ul dir="auto"> <li><code>hybrid_custody/get_all_nft_display_views_from_storage: [NFTData]</code> <ul dir="auto"> <li><code>address: Address</code></li> </ul> </li> </ul> <div class="highlight highlight-source-shell notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="flow scripts execute scripts/hybrid_custody/get_all_nft_display_views_from_storage.cdc <PARENT_ADDRESS>"><pre>flow scripts execute scripts/hybrid_custody/get_all_nft_display_views_from_storage.cdc <span class="pl-k"><</span>PARENT_ADDRESS<span class="pl-k">></span></pre></div> </li> </ol> <hr> <div class="markdown-heading" dir="auto"><h1 tabindex="-1" class="heading-element" dir="auto">Play Self-Custodied on Testnet</h1><a id="user-content-play-self-custodied-on-testnet" class="anchor" aria-label="Permalink: Play Self-Custodied on Testnet" href="#play-self-custodied-on-testnet"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">The contracts in this repos have been deployed to</p> <p dir="auto">If you want to play this game on testnet in a fully fledged Hybrid Custody app, check out our demo implementation <a href="https://walletless-arcade-game.vercel.app/" rel="nofollow">here</a>.</p> <p dir="auto">As for good old fashioned self-custody, while you won't be able to perform TicketToken minting, you can play RockPaperScissors Matches using your own wallet and NFTs. You could however use your own NFTs to engage with the contracts via Flow CLI, <a href="https://runflow.pratikpatel.io/" rel="nofollow">FlowRunner</a> or <a href="https://raft.page/nvdtf/welcome-to-raft" rel="nofollow">Raft</a>. Here's how:</p> <ol dir="auto"> <li> <p dir="auto">Onboard your account with GamePieceNFT Collection, NFT, & GamePlayer resource</p> <ul dir="auto"> <li><code>onboarding/self_custody_onboarding.cdc</code> <ul dir="auto"> <li><code>minterAddress: Address</code></li> </ul> </li> </ul> <div class="snippet-clipboard-content notranslate position-relative overflow-auto" data-snippet-clipboard-copy-content="flow transactions send transactions/onboarding/self_custody_onboarding.cdc 917b2b1dafdcfa58 --signer <YOUR_ACCOUNT_NAME> --network testnet"><pre class="notranslate"><code>flow transactions send transactions/onboarding/self_custody_onboarding.cdc 917b2b1dafdcfa58 --signer <YOUR_ACCOUNT_NAME> --network testnet </code></pre></div> <ol dir="auto"> <li>Check out your new resources on <a href="https://testnet.flowview.app/" rel="nofollow">FlowView</a> & note your GamePlayer.id & NFT.id</li> </ol> </li> <li> <p dir="auto">After you have a Collection, NFT, & GamePlayer configured, you're ready to play the game!</p> <ul dir="auto"> <li><code>rock_paper_scissors_game/game_player/setup_new_singleplayer_match.cdc</code> <ol dir="auto"> <li><code>submittingNFTID: UInt64</code></li> <li><code>matchTimeLimitInMinutes: UInt</code></li> </ol> </li> </ul> <div class="snippet-clipboard-content notranslate position-relative overflow-auto" data-snippet-clipboard-copy-content="flow transactions send transactions/rock_paper_scissors_game/game_player/setup_new_singleplayer_match.cdc <NFT_ID> <MATCH_TIMEOUT> --signer <YOUR_ACCOUNT_NAME> --network testnet"><pre class="notranslate"><code>flow transactions send transactions/rock_paper_scissors_game/game_player/setup_new_singleplayer_match.cdc <NFT_ID> <MATCH_TIMEOUT> --signer <YOUR_ACCOUNT_NAME> --network testnet </code></pre></div> </li> <li> <p dir="auto">Submit your move & the randomized second player's move</p> <ul dir="auto"> <li><code>rock_paper_scissors_game/game_player/submit_both_singleplayer_moves.cdc</code> <ol dir="auto"> <li><code>matchID: UInt64</code></li> <li><code>move: UInt8</code> - 0: rock, 1: paper, 2: scissors</li> </ol> </li> </ul> <div class="snippet-clipboard-content notranslate position-relative overflow-auto" data-snippet-clipboard-copy-content="flow transactions send transactions/rock_paper_scissors_game/game_player/submit_both_singleplayer_moves.cdc <MATCH_ID> <MOVE> --signer <YOUR_ACCOUNT_NAME> --network testnet"><pre class="notranslate"><code>flow transactions send transactions/rock_paper_scissors_game/game_player/submit_both_singleplayer_moves.cdc <MATCH_ID> <MOVE> --signer <YOUR_ACCOUNT_NAME> --network testnet </code></pre></div> </li> <li> <p dir="auto">Resolve the Match & return your NFT. Note that resolution needs to occur at least one block from when the last move was submitted.</p> <ul dir="auto"> <li><code>rock_paper_scissors_game/game_player/resolve_match_and_return_nfts.cdc</code> <ul dir="auto"> <li><code>matchID: UInt64</code></li> </ul> </li> </ul> <div class="snippet-clipboard-content notranslate position-relative overflow-auto" data-snippet-clipboard-copy-content="flow transactions send transactions/rock_paper_scissors_game/game_player/resolve_match_and_return_nfts.cdc <MATCH_ID> --signer <YOUR_ACCOUNT_NAME> --network testnet"><pre class="notranslate"><code>flow transactions send transactions/rock_paper_scissors_game/game_player/resolve_match_and_return_nfts.cdc <MATCH_ID> --signer <YOUR_ACCOUNT_NAME> --network testnet </code></pre></div> </li> <li> <p dir="auto">Query the moves played for the Match</p> <ul dir="auto"> <li><code>rock_paper_scissors_game/get_match_move_history: {UInt64: RockPaperScissorsGame.SubmittedMove}?</code> <ul dir="auto"> <li><code>matchID: UInt64</code></li> </ul> </li> </ul> <div class="snippet-clipboard-content notranslate position-relative overflow-auto" data-snippet-clipboard-copy-content="flow scripts execute scripts/rock_paper_scissors_game/get_match_move_history.cdc <MATCH_ID> --network testnet"><pre class="notranslate"><code>flow scripts execute scripts/rock_paper_scissors_game/get_match_move_history.cdc <MATCH_ID> --network testnet </code></pre></div> </li> <li> <p dir="auto">You can additionally query your NFT's win/loss record</p> <ul dir="auto"> <li><code>game_piece_nft/get_rps_win_loss: GamingMetadataViews.BasicWinLoss?</code> <ol dir="auto"> <li><code>address: Address</code></li> <li><code>id: UInt64</code></li> </ol> </li> </ul> <div class="snippet-clipboard-content notranslate position-relative overflow-auto" data-snippet-clipboard-copy-content="flow scripts execute scripts/game_piece_nft/get_rps_win_loss.cdc <YOUR_ADDRESS> <NFT_ID> --network testnet"><pre class="notranslate"><code>flow scripts execute scripts/game_piece_nft/get_rps_win_loss.cdc <YOUR_ADDRESS> <NFT_ID> --network testnet </code></pre></div> </li> </ol> </article></div></div></div></div></div>   <script type="application/json" id="__PRIMER_DATA_:R0:__">{"resolvedServerColorMode":"day"}</script></div> </react-partial> <input type="hidden" data-csrf="true" value="UMZIuWJPBFNeXGED5fxVYsI2RdJ1pt3BuRnkTS2toBYaM38hlQba8fIOpvmmPcesJAWfWgUmOHmKMojMGbQjmg==" /> </div> <div data-view-component="true" class="Layout-sidebar"> <div class="BorderGrid about-margin" data-pjax> <div class="BorderGrid-row"> <div class="BorderGrid-cell"> <div class="hide-sm hide-md"> <h2 class="mb-3 h4">About</h2> <p class="f4 my-3"> Showcasing how a Rock Paper Scissors game could be made #onFlow </p> <div class="my-3 d-flex flex-items-center"> <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-link flex-shrink-0 mr-2"> <path d="m7.775 3.275 1.25-1.25a3.5 3.5 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data-view-component="true" class="octicon octicon-code-of-conduct mr-2"> <path d="M8.048 2.241c.964-.709 2.079-1.238 3.325-1.241a4.616 4.616 0 0 1 3.282 1.355c.41.408.757.86.996 1.428.238.568.348 1.206.347 1.968 0 2.193-1.505 4.254-3.081 5.862-1.496 1.526-3.213 2.796-4.249 3.563l-.22.163a.749.749 0 0 1-.895 0l-.221-.163c-1.036-.767-2.753-2.037-4.249-3.563C1.51 10.008.007 7.952.002 5.762a4.614 4.614 0 0 1 1.353-3.407C3.123.585 6.223.537 8.048 2.24Zm-1.153.983c-1.25-1.033-3.321-.967-4.48.191a3.115 3.115 0 0 0-.913 2.335c0 1.556 1.109 3.24 2.652 4.813C5.463 11.898 6.96 13.032 8 13.805c.353-.262.758-.565 1.191-.905l-1.326-1.223a.75.75 0 0 1 1.018-1.102l1.48 1.366c.328-.281.659-.577.984-.887L9.99 9.802a.75.75 0 1 1 1.019-1.103l1.384 1.28c.295-.329.566-.661.81-.995L12.92 8.7l-1.167-1.168c-.674-.671-1.78-.664-2.474.03-.268.269-.538.537-.802.797-.893.882-2.319.843-3.185-.032-.346-.35-.693-.697-1.043-1.047a.75.75 0 0 1-.04-1.016c.162-.191.336-.401.52-.623.62-.748 1.356-1.637 2.166-2.417Zm7.112 4.442c.313-.65.491-1.293.491-1.916v-.001c0-.614-.088-1.045-.23-1.385-.143-.339-.357-.633-.673-.949a3.111 3.111 0 0 0-2.218-.915c-1.092.003-2.165.627-3.226 1.602-.823.755-1.554 1.637-2.228 2.45l-.127.154.562.566a.755.755 0 0 0 1.066.02l.794-.79c1.258-1.258 3.312-1.31 4.594-.032.396.394.792.791 1.173 1.173Z"></path> </svg> Code of conduct </a> </div> <h3 class="sr-only">Security policy</h3> <div class="mt-2"> <a href="#security-ov-file" class="Link--muted" data-analytics-event="{"category":"Repository Overview","action":"click","label":"location:sidebar;file:security policy"}" > <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-law mr-2"> <path d="M8.75.75V2h.985c.304 0 .603.08.867.231l1.29.736c.038.022.08.033.124.033h2.234a.75.75 0 0 1 0 1.5h-.427l2.111 4.692a.75.75 0 0 1-.154.838l-.53-.53.529.531-.001.002-.002.002-.006.006-.006.005-.01.01-.045.04c-.21.176-.441.327-.686.45C14.556 10.78 13.88 11 13 11a4.498 4.498 0 0 1-2.023-.454 3.544 3.544 0 0 1-.686-.45l-.045-.04-.016-.015-.006-.006-.004-.004v-.001a.75.75 0 0 1-.154-.838L12.178 4.5h-.162c-.305 0-.604-.079-.868-.231l-1.29-.736a.245.245 0 0 0-.124-.033H8.75V13h2.5a.75.75 0 0 1 0 1.5h-6.5a.75.75 0 0 1 0-1.5h2.5V3.5h-.984a.245.245 0 0 0-.124.033l-1.289.737c-.265.15-.564.23-.869.23h-.162l2.112 4.692a.75.75 0 0 1-.154.838l-.53-.53.529.531-.001.002-.002.002-.006.006-.016.015-.045.04c-.21.176-.441.327-.686.45C4.556 10.78 3.88 11 3 11a4.498 4.498 0 0 1-2.023-.454 3.544 3.544 0 0 1-.686-.45l-.045-.04-.016-.015-.006-.006-.004-.004v-.001a.75.75 0 0 1-.154-.838L2.178 4.5H1.75a.75.75 0 0 1 0-1.5h2.234a.249.249 0 0 0 .125-.033l1.288-.737c.265-.15.564-.23.869-.23h.984V.75a.75.75 0 0 1 1.5 0Zm2.945 8.477c.285.135.718.273 1.305.273s1.02-.138 1.305-.273L13 6.327Zm-10 0c.285.135.718.273 1.305.273s1.02-.138 1.305-.273L3 6.327Z"></path> </svg> Security policy </a> </div> <include-fragment src="/onflow/sc-eng-gaming/hovercards/citation/sidebar_partial?tree_name=main"> </include-fragment> <div class="mt-2"> <a href="/onflow/sc-eng-gaming/activity" data-view-component="true" class="Link Link--muted"><svg text="gray" aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-pulse mr-2"> <path d="M6 2c.306 0 .582.187.696.471L10 10.731l1.304-3.26A.751.751 0 0 1 12 7h3.25a.75.75 0 0 1 0 1.5h-2.742l-1.812 4.528a.751.751 0 0 1-1.392 0L6 4.77 4.696 8.03A.75.75 0 0 1 4 8.5H.75a.75.75 0 0 1 0-1.5h2.742l1.812-4.529A.751.751 0 0 1 6 2Z"></path> </svg> <span class="color-fg-muted">Activity</span></a> </div> <div class="mt-2"> <a href="/onflow/sc-eng-gaming/custom-properties" data-view-component="true" class="Link Link--muted"><svg text="gray" aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-note mr-2"> <path d="M0 3.75C0 2.784.784 2 1.75 2h12.5c.966 0 1.75.784 1.75 1.75v8.5A1.75 1.75 0 0 1 14.25 14H1.75A1.75 1.75 0 0 1 0 12.25Zm1.75-.25a.25.25 0 0 0-.25.25v8.5c0 .138.112.25.25.25h12.5a.25.25 0 0 0 .25-.25v-8.5a.25.25 0 0 0-.25-.25ZM3.5 6.25a.75.75 0 0 1 .75-.75h7a.75.75 0 0 1 0 1.5h-7a.75.75 0 0 1-.75-.75Zm.75 2.25h4a.75.75 0 0 1 0 1.5h-4a.75.75 0 0 1 0-1.5Z"></path> </svg> <span class="color-fg-muted">Custom properties</span></a> </div> <h3 class="sr-only">Stars</h3> <div class="mt-2"> <a href="/onflow/sc-eng-gaming/stargazers" data-view-component="true" class="Link Link--muted"><svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-star mr-2"> <path d="M8 .25a.75.75 0 0 1 .673.418l1.882 3.815 4.21.612a.75.75 0 0 1 .416 1.279l-3.046 2.97.719 4.192a.751.751 0 0 1-1.088.791L8 12.347l-3.766 1.98a.75.75 0 0 1-1.088-.79l.72-4.194L.818 6.374a.75.75 0 0 1 .416-1.28l4.21-.611L7.327.668A.75.75 0 0 1 8 .25Zm0 2.445L6.615 5.5a.75.75 0 0 1-.564.41l-3.097.45 2.24 2.184a.75.75 0 0 1 .216.664l-.528 3.084 2.769-1.456a.75.75 0 0 1 .698 0l2.77 1.456-.53-3.084a.75.75 0 0 1 .216-.664l2.24-2.183-3.096-.45a.75.75 0 0 1-.564-.41L8 2.694Z"></path> </svg> <strong>10</strong> stars</a> </div> <h3 class="sr-only">Watchers</h3> <div class="mt-2"> <a href="/onflow/sc-eng-gaming/watchers" data-view-component="true" class="Link Link--muted"><svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-eye mr-2"> <path d="M8 2c1.981 0 3.671.992 4.933 2.078 1.27 1.091 2.187 2.345 2.637 3.023a1.62 1.62 0 0 1 0 1.798c-.45.678-1.367 1.932-2.637 3.023C11.67 13.008 9.981 14 8 14c-1.981 0-3.671-.992-4.933-2.078C1.797 10.83.88 9.576.43 8.898a1.62 1.62 0 0 1 0-1.798c.45-.677 1.367-1.931 2.637-3.022C4.33 2.992 6.019 2 8 2ZM1.679 7.932a.12.12 0 0 0 0 .136c.411.622 1.241 1.75 2.366 2.717C5.176 11.758 6.527 12.5 8 12.5c1.473 0 2.825-.742 3.955-1.715 1.124-.967 1.954-2.096 2.366-2.717a.12.12 0 0 0 0-.136c-.412-.621-1.242-1.75-2.366-2.717C10.824 4.242 9.473 3.5 8 3.5c-1.473 0-2.825.742-3.955 1.715-1.124.967-1.954 2.096-2.366 2.717ZM8 10a2 2 0 1 1-.001-3.999A2 2 0 0 1 8 10Z"></path> </svg> <strong>30</strong> watching</a> </div> <h3 class="sr-only">Forks</h3> <div class="mt-2"> <a href="/onflow/sc-eng-gaming/forks" data-view-component="true" class="Link Link--muted"><svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-repo-forked mr-2"> <path d="M5 5.372v.878c0 .414.336.75.75.75h4.5a.75.75 0 0 0 .75-.75v-.878a2.25 2.25 0 1 1 1.5 0v.878a2.25 2.25 0 0 1-2.25 2.25h-1.5v2.128a2.251 2.251 0 1 1-1.5 0V8.5h-1.5A2.25 2.25 0 0 1 3.5 6.25v-.878a2.25 2.25 0 1 1 1.5 0ZM5 3.25a.75.75 0 1 0-1.5 0 .75.75 0 0 0 1.5 0Zm6.75.75a.75.75 0 1 0 0-1.5.75.75 0 0 0 0 1.5Zm-3 8.75a.75.75 0 1 0-1.5 0 .75.75 0 0 0 1.5 0Z"></path> </svg> <strong>2</strong> forks</a> </div> <div class="mt-2"> <a class="Link--muted" href="/contact/report-content?content_url=https%3A%2F%2Fgithub.com%2Fonflow%2Fsc-eng-gaming&report=onflow+%28user%29"> Report repository </a> </div> </div> </div> </div> <div class="BorderGrid-row" hidden> <div class="BorderGrid-cell"> <include-fragment src="/onflow/sc-eng-gaming/used_by_list" accept="text/fragment+html"> </include-fragment> </div> </div> <div class="BorderGrid-row"> <div class="BorderGrid-cell"> <h2 class="h4 mb-3"> <a href="/onflow/sc-eng-gaming/graphs/contributors" data-view-component="true" class="Link--primary no-underline Link d-flex flex-items-center">Contributors <span title="3" data-view-component="true" class="Counter ml-1">3</span></a></h2> <include-fragment src="/onflow/sc-eng-gaming/contributors_list?count=3&current_repository=sc-eng-gaming&items_to_show=3" aria-busy="true" aria-label="Loading contributors"> <ul class="list-style-none "> <li class="mb-2 d-flex"> <div class="Skeleton avatar avatar-user mr-2" 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border-0 p-0 color-bg-transparent" data-action="click:cookie-consent-link#showConsentManagement" data-analytics-event="{"location":"footer","action":"dont_share_info","context":"subfooter","tag":"link","label":"dont_share_info_link_subfooter_footer"}" > Do not share my personal information </button> </cookie-consent-link> </li> </ul> </nav> </div> </footer> <ghcc-consent id="ghcc" class="position-fixed bottom-0 left-0" style="z-index: 999999" data-initial-cookie-consent-allowed="" data-cookie-consent-required="false"></ghcc-consent> <div id="ajax-error-message" class="ajax-error-message flash flash-error" hidden> <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-alert"> <path d="M6.457 1.047c.659-1.234 2.427-1.234 3.086 0l6.082 11.378A1.75 1.75 0 0 1 14.082 15H1.918a1.75 1.75 0 0 1-1.543-2.575Zm1.763.707a.25.25 0 0 0-.44 0L1.698 13.132a.25.25 0 0 0 .22.368h12.164a.25.25 0 0 0 .22-.368Zm.53 3.996v2.5a.75.75 0 0 1-1.5 0v-2.5a.75.75 0 0 1 1.5 0ZM9 11a1 1 0 1 1-2 0 1 1 0 0 1 2 0Z"></path> </svg> <button type="button" class="flash-close js-ajax-error-dismiss" aria-label="Dismiss error"> <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-x"> <path d="M3.72 3.72a.75.75 0 0 1 1.06 0L8 6.94l3.22-3.22a.749.749 0 0 1 1.275.326.749.749 0 0 1-.215.734L9.06 8l3.22 3.22a.749.749 0 0 1-.326 1.275.749.749 0 0 1-.734-.215L8 9.06l-3.22 3.22a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042L6.94 8 3.72 4.78a.75.75 0 0 1 0-1.06Z"></path> </svg> </button> You can’t perform that action at this time. </div> <template id="site-details-dialog"> <details class="details-reset details-overlay details-overlay-dark lh-default color-fg-default hx_rsm" open> <summary role="button" aria-label="Close dialog"></summary> <details-dialog class="Box Box--overlay d-flex flex-column anim-fade-in fast hx_rsm-dialog hx_rsm-modal"> <button class="Box-btn-octicon m-0 btn-octicon position-absolute right-0 top-0" type="button" aria-label="Close dialog" data-close-dialog> <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-x"> <path d="M3.72 3.72a.75.75 0 0 1 1.06 0L8 6.94l3.22-3.22a.749.749 0 0 1 1.275.326.749.749 0 0 1-.215.734L9.06 8l3.22 3.22a.749.749 0 0 1-.326 1.275.749.749 0 0 1-.734-.215L8 9.06l-3.22 3.22a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042L6.94 8 3.72 4.78a.75.75 0 0 1 0-1.06Z"></path> </svg> </button> <div class="octocat-spinner my-6 js-details-dialog-spinner"></div> </details-dialog> </details> </template> <div class="Popover js-hovercard-content position-absolute" style="display: none; outline: none;"> <div class="Popover-message Popover-message--bottom-left Popover-message--large Box color-shadow-large" style="width:360px;"> </div> </div> <template id="snippet-clipboard-copy-button"> <div class="zeroclipboard-container position-absolute right-0 top-0"> <clipboard-copy aria-label="Copy" class="ClipboardButton btn js-clipboard-copy m-2 p-0" data-copy-feedback="Copied!" data-tooltip-direction="w"> <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-copy js-clipboard-copy-icon m-2"> <path d="M0 6.75C0 5.784.784 5 1.75 5h1.5a.75.75 0 0 1 0 1.5h-1.5a.25.25 0 0 0-.25.25v7.5c0 .138.112.25.25.25h7.5a.25.25 0 0 0 .25-.25v-1.5a.75.75 0 0 1 1.5 0v1.5A1.75 1.75 0 0 1 9.25 16h-7.5A1.75 1.75 0 0 1 0 14.25Z"></path><path d="M5 1.75C5 .784 5.784 0 6.75 0h7.5C15.216 0 16 .784 16 1.75v7.5A1.75 1.75 0 0 1 14.25 11h-7.5A1.75 1.75 0 0 1 5 9.25Zm1.75-.25a.25.25 0 0 0-.25.25v7.5c0 .138.112.25.25.25h7.5a.25.25 0 0 0 .25-.25v-7.5a.25.25 0 0 0-.25-.25Z"></path> </svg> <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-check js-clipboard-check-icon color-fg-success d-none m-2"> <path d="M13.78 4.22a.75.75 0 0 1 0 1.06l-7.25 7.25a.75.75 0 0 1-1.06 0L2.22 9.28a.751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018L6 10.94l6.72-6.72a.75.75 0 0 1 1.06 0Z"></path> </svg> </clipboard-copy> </div> </template> <template id="snippet-clipboard-copy-button-unpositioned"> <div class="zeroclipboard-container"> <clipboard-copy aria-label="Copy" class="ClipboardButton btn btn-invisible js-clipboard-copy m-2 p-0 d-flex flex-justify-center flex-items-center" data-copy-feedback="Copied!" data-tooltip-direction="w"> <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-copy js-clipboard-copy-icon"> <path d="M0 6.75C0 5.784.784 5 1.75 5h1.5a.75.75 0 0 1 0 1.5h-1.5a.25.25 0 0 0-.25.25v7.5c0 .138.112.25.25.25h7.5a.25.25 0 0 0 .25-.25v-1.5a.75.75 0 0 1 1.5 0v1.5A1.75 1.75 0 0 1 9.25 16h-7.5A1.75 1.75 0 0 1 0 14.25Z"></path><path d="M5 1.75C5 .784 5.784 0 6.75 0h7.5C15.216 0 16 .784 16 1.75v7.5A1.75 1.75 0 0 1 14.25 11h-7.5A1.75 1.75 0 0 1 5 9.25Zm1.75-.25a.25.25 0 0 0-.25.25v7.5c0 .138.112.25.25.25h7.5a.25.25 0 0 0 .25-.25v-7.5a.25.25 0 0 0-.25-.25Z"></path> </svg> <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-check js-clipboard-check-icon color-fg-success d-none"> <path d="M13.78 4.22a.75.75 0 0 1 0 1.06l-7.25 7.25a.75.75 0 0 1-1.06 0L2.22 9.28a.751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018L6 10.94l6.72-6.72a.75.75 0 0 1 1.06 0Z"></path> </svg> </clipboard-copy> </div> </template> </div> <div id="js-global-screen-reader-notice" class="sr-only mt-n1" aria-live="polite" aria-atomic="true" ></div> <div id="js-global-screen-reader-notice-assertive" class="sr-only mt-n1" aria-live="assertive" aria-atomic="true"></div> </body> </html>