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hover:_bg-gray-800/5 dark:hover:_bg-gray-100/5 motion-reduce:*:_transition-none *:_origin-center *:_transition-transform *:rtl:_-rotate-180"><path d="M9 5l7 7-7 7" stroke-linecap="round" stroke-linejoin="round"></path></svg></button><div class="_transform-gpu _transition-all _ease-in-out motion-reduce:_transition-none _opacity-0 _overflow-hidden" style="height:0;transition-duration:300ms"><div><ul class="_flex _flex-col _gap-1 _relative before:_absolute before:_inset-y-1 before:_w-px before:_bg-gray-200 before:_content-[""] dark:before:_bg-neutral-800 ltr:_pl-3 ltr:before:_left-0 rtl:_pr-3 rtl:before:_right-0 _pt-1 ltr:_ml-3 rtl:_mr-3"><li class="_flex _flex-col _gap-1"><a class="nextra-focus _flex _rounded _px-2 _py-1.5 _text-sm _transition-colors [word-break:break-word] _cursor-pointer contrast-more:_border _text-gray-500 hover:_bg-gray-100 hover:_text-gray-900 dark:_text-neutral-400 dark:hover:_bg-primary-100/5 dark:hover:_text-gray-50 contrast-more:_text-gray-900 contrast-more:dark:_text-gray-50 contrast-more:_border-transparent contrast-more:hover:_border-gray-900 contrast-more:dark:hover:_border-gray-50" href="/docs/device-app/integration/how-to/c-boilerplate">C Boilerplate</a></li><li class="_flex _flex-col _gap-1"><a class="nextra-focus _flex _rounded _px-2 _py-1.5 _text-sm _transition-colors [word-break:break-word] _cursor-pointer contrast-more:_border _text-gray-500 hover:_bg-gray-100 hover:_text-gray-900 dark:_text-neutral-400 dark:hover:_bg-primary-100/5 dark:hover:_text-gray-50 contrast-more:_text-gray-900 contrast-more:dark:_text-gray-50 contrast-more:_border-transparent contrast-more:hover:_border-gray-900 contrast-more:dark:hover:_border-gray-50" href="/docs/device-app/integration/how-to/rust-boilerplate">Rust Boilerplate</a></li><li class="_flex _flex-col _gap-1"><a class="nextra-focus _flex _rounded _px-2 _py-1.5 _text-sm _transition-colors [word-break:break-word] _cursor-pointer contrast-more:_border _text-gray-500 hover:_bg-gray-100 hover:_text-gray-900 dark:_text-neutral-400 dark:hover:_bg-primary-100/5 dark:hover:_text-gray-50 contrast-more:_text-gray-900 contrast-more:dark:_text-gray-50 contrast-more:_border-transparent contrast-more:hover:_border-gray-900 contrast-more:dark:hover:_border-gray-50" href="/docs/device-app/integration/how-to/plugin">Ethereum Plugin</a></li><li class="_flex _flex-col _gap-1"><a class="nextra-focus _flex _rounded _px-2 _py-1.5 _text-sm _transition-colors [word-break:break-word] _cursor-pointer contrast-more:_border _text-gray-500 hover:_bg-gray-100 hover:_text-gray-900 dark:_text-neutral-400 dark:hover:_bg-primary-100/5 dark:hover:_text-gray-50 contrast-more:_text-gray-900 contrast-more:dark:_text-gray-50 contrast-more:_border-transparent contrast-more:hover:_border-gray-900 contrast-more:dark:hover:_border-gray-50" href="/docs/device-app/integration/how-to/clone">Clone Coin Application</a></li></ul></div></div></li><li class=""><button class="_transition _items-center _justify-between _gap-2 _text-left _w-full _flex _rounded _px-2 _py-1.5 _text-sm _transition-colors [word-break:break-word] _cursor-pointer contrast-more:_border _text-gray-500 hover:_bg-gray-100 hover:_text-gray-900 dark:_text-neutral-400 dark:hover:_bg-primary-100/5 dark:hover:_text-gray-50 contrast-more:_text-gray-900 contrast-more:dark:_text-gray-50 contrast-more:_border-transparent contrast-more:hover:_border-gray-900 contrast-more:dark:hover:_border-gray-50" data-href="/docs/device-app/integration/design-guidelines" type="button" data-headlessui-state="">Graphic Library Usage Guidelines<svg viewBox="0 0 24 24" stroke="currentColor" fill="none" stroke-width="2" height="18" class="_shrink-0 _rounded-sm _p-0.5 hover:_bg-gray-800/5 dark:hover:_bg-gray-100/5 motion-reduce:*:_transition-none *:_origin-center *:_transition-transform *:rtl:_-rotate-180"><path d="M9 5l7 7-7 7" stroke-linecap="round" stroke-linejoin="round"></path></svg></button><div class="_transform-gpu _transition-all _ease-in-out motion-reduce:_transition-none _opacity-0 _overflow-hidden" style="height:0;transition-duration:300ms"><div><ul class="_flex _flex-col _gap-1 _relative before:_absolute before:_inset-y-1 before:_w-px before:_bg-gray-200 before:_content-[""] dark:before:_bg-neutral-800 ltr:_pl-3 ltr:before:_left-0 rtl:_pr-3 rtl:before:_right-0 _pt-1 ltr:_ml-3 rtl:_mr-3"><li class="_flex _flex-col _gap-1"><a class="nextra-focus _flex _rounded _px-2 _py-1.5 _text-sm _transition-colors [word-break:break-word] _cursor-pointer contrast-more:_border _text-gray-500 hover:_bg-gray-100 hover:_text-gray-900 dark:_text-neutral-400 dark:hover:_bg-primary-100/5 dark:hover:_text-gray-50 contrast-more:_text-gray-900 contrast-more:dark:_text-gray-50 contrast-more:_border-transparent contrast-more:hover:_border-gray-900 contrast-more:dark:hover:_border-gray-50" href="/docs/device-app/integration/design-guidelines/intro">Introduction</a></li><li class="_flex _flex-col _gap-1"><a class="nextra-focus _flex _rounded _px-2 _py-1.5 _text-sm _transition-colors [word-break:break-word] _cursor-pointer contrast-more:_border _text-gray-500 hover:_bg-gray-100 hover:_text-gray-900 dark:_text-neutral-400 dark:hover:_bg-primary-100/5 dark:hover:_text-gray-50 contrast-more:_text-gray-900 contrast-more:dark:_text-gray-50 contrast-more:_border-transparent contrast-more:hover:_border-gray-900 contrast-more:dark:hover:_border-gray-50" href="/docs/device-app/integration/design-guidelines/home">App's homepage</a></li><li class="_flex _flex-col _gap-1"><a class="nextra-focus _flex _rounded _px-2 _py-1.5 _text-sm _transition-colors [word-break:break-word] _cursor-pointer contrast-more:_border _text-gray-500 hover:_bg-gray-100 hover:_text-gray-900 dark:_text-neutral-400 dark:hover:_bg-primary-100/5 dark:hover:_text-gray-50 contrast-more:_text-gray-900 contrast-more:dark:_text-gray-50 contrast-more:_border-transparent contrast-more:hover:_border-gray-900 contrast-more:dark:hover:_border-gray-50" href="/docs/device-app/integration/design-guidelines/info-settings">App info and settings</a></li><li class="_flex _flex-col _gap-1"><a class="nextra-focus _flex _rounded _px-2 _py-1.5 _text-sm _transition-colors [word-break:break-word] _cursor-pointer contrast-more:_border _text-gray-500 hover:_bg-gray-100 hover:_text-gray-900 dark:_text-neutral-400 dark:hover:_bg-primary-100/5 dark:hover:_text-gray-50 contrast-more:_text-gray-900 contrast-more:dark:_text-gray-50 contrast-more:_border-transparent contrast-more:hover:_border-gray-900 contrast-more:dark:hover:_border-gray-50" href="/docs/device-app/integration/design-guidelines/transactions">Signing transactions and messages</a></li><li class="_flex _flex-col _gap-1"><a class="nextra-focus _flex _rounded _px-2 _py-1.5 _text-sm _transition-colors [word-break:break-word] _cursor-pointer contrast-more:_border _text-gray-500 hover:_bg-gray-100 hover:_text-gray-900 dark:_text-neutral-400 dark:hover:_bg-primary-100/5 dark:hover:_text-gray-50 contrast-more:_text-gray-900 contrast-more:dark:_text-gray-50 contrast-more:_border-transparent contrast-more:hover:_border-gray-900 contrast-more:dark:hover:_border-gray-50" href="/docs/device-app/integration/design-guidelines/address">Address verification</a></li><li class="_flex _flex-col _gap-1"><a class="nextra-focus _flex _rounded _px-2 _py-1.5 _text-sm _transition-colors [word-break:break-word] _cursor-pointer contrast-more:_border _text-gray-500 hover:_bg-gray-100 hover:_text-gray-900 dark:_text-neutral-400 dark:hover:_bg-primary-100/5 dark:hover:_text-gray-50 contrast-more:_text-gray-900 contrast-more:dark:_text-gray-50 contrast-more:_border-transparent contrast-more:hover:_border-gray-900 contrast-more:dark:hover:_border-gray-50" href="/docs/device-app/integration/design-guidelines/advanced">Advanced interactions</a></li></ul></div></div></li></ul></div></div></li><li class=""><button class="_transition _items-center _justify-between _gap-2 _text-left _w-full _flex _rounded _px-2 _py-1.5 _text-sm _transition-colors [word-break:break-word] _cursor-pointer contrast-more:_border _text-gray-500 hover:_bg-gray-100 hover:_text-gray-900 dark:_text-neutral-400 dark:hover:_bg-primary-100/5 dark:hover:_text-gray-50 contrast-more:_text-gray-900 contrast-more:dark:_text-gray-50 contrast-more:_border-transparent contrast-more:hover:_border-gray-900 contrast-more:dark:hover:_border-gray-50" data-href="/docs/device-app/references" type="button" data-headlessui-state="">References<svg viewBox="0 0 24 24" stroke="currentColor" fill="none" stroke-width="2" height="18" class="_shrink-0 _rounded-sm _p-0.5 hover:_bg-gray-800/5 dark:hover:_bg-gray-100/5 motion-reduce:*:_transition-none *:_origin-center *:_transition-transform *:rtl:_-rotate-180"><path d="M9 5l7 7-7 7" stroke-linecap="round" stroke-linejoin="round"></path></svg></button><div class="_transform-gpu _transition-all _ease-in-out motion-reduce:_transition-none _opacity-0 _overflow-hidden" style="height:0;transition-duration:300ms"><div><ul class="_flex _flex-col _gap-1 _relative before:_absolute before:_inset-y-1 before:_w-px before:_bg-gray-200 before:_content-[""] dark:before:_bg-neutral-800 ltr:_pl-3 ltr:before:_left-0 rtl:_pr-3 rtl:before:_right-0 _pt-1 ltr:_ml-3 rtl:_mr-3"><li class="_flex _flex-col _gap-1"><a class="nextra-focus _flex _rounded _px-2 _py-1.5 _text-sm _transition-colors [word-break:break-word] _cursor-pointer contrast-more:_border _text-gray-500 hover:_bg-gray-100 hover:_text-gray-900 dark:_text-neutral-400 dark:hover:_bg-primary-100/5 dark:hover:_text-gray-50 contrast-more:_text-gray-900 contrast-more:dark:_text-gray-50 contrast-more:_border-transparent contrast-more:hover:_border-gray-900 contrast-more:dark:hover:_border-gray-50" href="/docs/device-app/references/framework">Development framework</a></li><li class="_flex _flex-col _gap-1"><a class="nextra-focus _flex _rounded _px-2 _py-1.5 _text-sm _transition-colors [word-break:break-word] _cursor-pointer contrast-more:_border _text-gray-500 hover:_bg-gray-100 hover:_text-gray-900 dark:_text-neutral-400 dark:hover:_bg-primary-100/5 dark:hover:_text-gray-50 contrast-more:_text-gray-900 contrast-more:dark:_text-gray-50 contrast-more:_border-transparent contrast-more:hover:_border-gray-900 contrast-more:dark:hover:_border-gray-50" href="/docs/device-app/references/tools">Developing tools overview</a></li><li class="_flex _flex-col _gap-1"><a class="nextra-focus _flex _rounded _px-2 _py-1.5 _text-sm _transition-colors [word-break:break-word] _cursor-pointer contrast-more:_border _text-gray-500 hover:_bg-gray-100 hover:_text-gray-900 dark:_text-neutral-400 dark:hover:_bg-primary-100/5 dark:hover:_text-gray-50 contrast-more:_text-gray-900 contrast-more:dark:_text-gray-50 contrast-more:_border-transparent contrast-more:hover:_border-gray-900 contrast-more:dark:hover:_border-gray-50" href="/docs/device-app/references/app-permissions">App permissions</a></li><li class="_flex _flex-col _gap-1"><a class="nextra-focus _flex _rounded _px-2 _py-1.5 _text-sm _transition-colors [word-break:break-word] _cursor-pointer contrast-more:_border _text-gray-500 hover:_bg-gray-100 hover:_text-gray-900 dark:_text-neutral-400 dark:hover:_bg-primary-100/5 dark:hover:_text-gray-50 contrast-more:_text-gray-900 contrast-more:dark:_text-gray-50 contrast-more:_border-transparent contrast-more:hover:_border-gray-900 contrast-more:dark:hover:_border-gray-50" href="/docs/device-app/references/cryptography-api">Cryptography API</a></li><li class="_flex _flex-col _gap-1"><a class="nextra-focus _flex _rounded _px-2 _py-1.5 _text-sm _transition-colors [word-break:break-word] _cursor-pointer contrast-more:_border _text-gray-500 hover:_bg-gray-100 hover:_text-gray-900 dark:_text-neutral-400 dark:hover:_bg-primary-100/5 dark:hover:_text-gray-50 contrast-more:_text-gray-900 contrast-more:dark:_text-gray-50 contrast-more:_border-transparent contrast-more:hover:_border-gray-900 contrast-more:dark:hover:_border-gray-50" href="/docs/device-app/references/cryptography-api-examples">Cryptography API examples</a></li></ul></div></div></li><li class=""><button class="_transition _items-center _justify-between _gap-2 _text-left _w-full _flex _rounded _px-2 _py-1.5 _text-sm _transition-colors [word-break:break-word] _cursor-pointer contrast-more:_border _text-gray-500 hover:_bg-gray-100 hover:_text-gray-900 dark:_text-neutral-400 dark:hover:_bg-primary-100/5 dark:hover:_text-gray-50 contrast-more:_text-gray-900 contrast-more:dark:_text-gray-50 contrast-more:_border-transparent contrast-more:hover:_border-gray-900 contrast-more:dark:hover:_border-gray-50" data-href="/docs/device-app/explanation" type="button" data-headlessui-state="">Explanation<svg viewBox="0 0 24 24" stroke="currentColor" fill="none" stroke-width="2" height="18" class="_shrink-0 _rounded-sm _p-0.5 hover:_bg-gray-800/5 dark:hover:_bg-gray-100/5 motion-reduce:*:_transition-none *:_origin-center *:_transition-transform *:rtl:_-rotate-180"><path d="M9 5l7 7-7 7" stroke-linecap="round" stroke-linejoin="round"></path></svg></button><div class="_transform-gpu _transition-all _ease-in-out motion-reduce:_transition-none _opacity-0 _overflow-hidden" style="height:0;transition-duration:300ms"><div><ul class="_flex _flex-col _gap-1 _relative before:_absolute before:_inset-y-1 before:_w-px before:_bg-gray-200 before:_content-[""] dark:before:_bg-neutral-800 ltr:_pl-3 ltr:before:_left-0 rtl:_pr-3 rtl:before:_right-0 _pt-1 ltr:_ml-3 rtl:_mr-3"><li class="_flex _flex-col _gap-1"><a class="nextra-focus _flex _rounded _px-2 _py-1.5 _text-sm _transition-colors [word-break:break-word] _cursor-pointer contrast-more:_border _text-gray-500 hover:_bg-gray-100 hover:_text-gray-900 dark:_text-neutral-400 dark:hover:_bg-primary-100/5 dark:hover:_text-gray-50 contrast-more:_text-gray-900 contrast-more:dark:_text-gray-50 contrast-more:_border-transparent contrast-more:hover:_border-gray-900 contrast-more:dark:hover:_border-gray-50" href="/docs/device-app/explanation/device-app-role">What is the role of the device app?</a></li><li class="_flex _flex-col _gap-1"><a class="nextra-focus _flex _rounded _px-2 _py-1.5 _text-sm _transition-colors [word-break:break-word] _cursor-pointer contrast-more:_border _text-gray-500 hover:_bg-gray-100 hover:_text-gray-900 dark:_text-neutral-400 dark:hover:_bg-primary-100/5 dark:hover:_text-gray-50 contrast-more:_text-gray-900 contrast-more:dark:_text-gray-50 contrast-more:_border-transparent contrast-more:hover:_border-gray-900 contrast-more:dark:hover:_border-gray-50" href="/docs/device-app/explanation/plugin">Ethereum Plugins and Ethereum Clone Apps: What's the Difference?</a></li><li class="_flex _flex-col _gap-1"><a class="nextra-focus _flex _rounded _px-2 _py-1.5 _text-sm _transition-colors [word-break:break-word] _cursor-pointer contrast-more:_border _text-gray-500 hover:_bg-gray-100 hover:_text-gray-900 dark:_text-neutral-400 dark:hover:_bg-primary-100/5 dark:hover:_text-gray-50 contrast-more:_text-gray-900 contrast-more:dark:_text-gray-50 contrast-more:_border-transparent contrast-more:hover:_border-gray-900 contrast-more:dark:hover:_border-gray-50" href="/docs/device-app/explanation/architecture-diagram">Architecture diagram</a></li><li class="_flex _flex-col _gap-1"><a class="nextra-focus _flex _rounded _px-2 _py-1.5 _text-sm _transition-colors [word-break:break-word] _cursor-pointer contrast-more:_border _text-gray-500 hover:_bg-gray-100 hover:_text-gray-900 dark:_text-neutral-400 dark:hover:_bg-primary-100/5 dark:hover:_text-gray-50 contrast-more:_text-gray-900 contrast-more:dark:_text-gray-50 contrast-more:_border-transparent contrast-more:hover:_border-gray-900 contrast-more:dark:hover:_border-gray-50" href="/docs/device-app/explanation/architecture-good-practices">Architecture good practices</a></li><li class="_flex _flex-col _gap-1"><a class="nextra-focus _flex _rounded _px-2 _py-1.5 _text-sm _transition-colors [word-break:break-word] _cursor-pointer contrast-more:_border _text-gray-500 hover:_bg-gray-100 hover:_text-gray-900 dark:_text-neutral-400 dark:hover:_bg-primary-100/5 dark:hover:_text-gray-50 contrast-more:_text-gray-900 contrast-more:dark:_text-gray-50 contrast-more:_border-transparent contrast-more:hover:_border-gray-900 contrast-more:dark:hover:_border-gray-50" href="/docs/device-app/explanation/io">Application Structure and I/O</a></li><li class="_flex _flex-col _gap-1"><a class="nextra-focus _flex _rounded _px-2 _py-1.5 _text-sm _transition-colors [word-break:break-word] _cursor-pointer contrast-more:_border _text-gray-500 hover:_bg-gray-100 hover:_text-gray-900 dark:_text-neutral-400 dark:hover:_bg-primary-100/5 dark:hover:_text-gray-50 contrast-more:_text-gray-900 contrast-more:dark:_text-gray-50 contrast-more:_border-transparent contrast-more:hover:_border-gray-900 contrast-more:dark:hover:_border-gray-50" href="/docs/device-app/explanation/cryptography">Cryptography general concepts</a></li><li class=""><button class="_transition _items-center _justify-between _gap-2 _text-left _w-full _flex _rounded _px-2 _py-1.5 _text-sm _transition-colors [word-break:break-word] _cursor-pointer contrast-more:_border _text-gray-500 hover:_bg-gray-100 hover:_text-gray-900 dark:_text-neutral-400 dark:hover:_bg-primary-100/5 dark:hover:_text-gray-50 contrast-more:_text-gray-900 contrast-more:dark:_text-gray-50 contrast-more:_border-transparent contrast-more:hover:_border-gray-900 contrast-more:dark:hover:_border-gray-50" data-href="/docs/device-app/explanation/psd" type="button" data-headlessui-state="">Personal Security Devices<svg viewBox="0 0 24 24" stroke="currentColor" fill="none" stroke-width="2" height="18" class="_shrink-0 _rounded-sm _p-0.5 hover:_bg-gray-800/5 dark:hover:_bg-gray-100/5 motion-reduce:*:_transition-none *:_origin-center *:_transition-transform *:rtl:_-rotate-180"><path d="M9 5l7 7-7 7" stroke-linecap="round" stroke-linejoin="round"></path></svg></button><div class="_transform-gpu _transition-all _ease-in-out motion-reduce:_transition-none _opacity-0 _overflow-hidden" style="height:0;transition-duration:300ms"><div><ul class="_flex _flex-col _gap-1 _relative before:_absolute before:_inset-y-1 before:_w-px before:_bg-gray-200 before:_content-[""] dark:before:_bg-neutral-800 ltr:_pl-3 ltr:before:_left-0 rtl:_pr-3 rtl:before:_right-0 _pt-1 ltr:_ml-3 rtl:_mr-3"><li class="_flex _flex-col _gap-1"><a class="nextra-focus _flex _rounded _px-2 _py-1.5 _text-sm _transition-colors [word-break:break-word] _cursor-pointer contrast-more:_border _text-gray-500 hover:_bg-gray-100 hover:_text-gray-900 dark:_text-neutral-400 dark:hover:_bg-primary-100/5 dark:hover:_text-gray-50 contrast-more:_text-gray-900 contrast-more:dark:_text-gray-50 contrast-more:_border-transparent contrast-more:hover:_border-gray-900 contrast-more:dark:hover:_border-gray-50" href="/docs/device-app/explanation/psd/introduction">Introduction</a></li><li class="_flex _flex-col _gap-1"><a class="nextra-focus _flex _rounded _px-2 _py-1.5 _text-sm _transition-colors [word-break:break-word] _cursor-pointer contrast-more:_border _text-gray-500 hover:_bg-gray-100 hover:_text-gray-900 dark:_text-neutral-400 dark:hover:_bg-primary-100/5 dark:hover:_text-gray-50 contrast-more:_text-gray-900 contrast-more:dark:_text-gray-50 contrast-more:_border-transparent contrast-more:hover:_border-gray-900 contrast-more:dark:hover:_border-gray-50" href="/docs/device-app/explanation/psd/masterseed">The master seed</a></li><li class="_flex _flex-col _gap-1"><a class="nextra-focus _flex _rounded _px-2 _py-1.5 _text-sm _transition-colors [word-break:break-word] _cursor-pointer contrast-more:_border _text-gray-500 hover:_bg-gray-100 hover:_text-gray-900 dark:_text-neutral-400 dark:hover:_bg-primary-100/5 dark:hover:_text-gray-50 contrast-more:_text-gray-900 contrast-more:dark:_text-gray-50 contrast-more:_border-transparent contrast-more:hover:_border-gray-900 contrast-more:dark:hover:_border-gray-50" href="/docs/device-app/explanation/psd/keys">HD key generation</a></li><li class="_flex _flex-col _gap-1"><a class="nextra-focus _flex _rounded _px-2 _py-1.5 _text-sm _transition-colors [word-break:break-word] _cursor-pointer contrast-more:_border _text-gray-500 hover:_bg-gray-100 hover:_text-gray-900 dark:_text-neutral-400 dark:hover:_bg-primary-100/5 dark:hover:_text-gray-50 contrast-more:_text-gray-900 contrast-more:dark:_text-gray-50 contrast-more:_border-transparent contrast-more:hover:_border-gray-900 contrast-more:dark:hover:_border-gray-50" href="/docs/device-app/explanation/psd/applications">Application for HD trees</a></li><li class="_flex _flex-col _gap-1"><a class="nextra-focus _flex _rounded _px-2 _py-1.5 _text-sm _transition-colors [word-break:break-word] _cursor-pointer contrast-more:_border _text-gray-500 hover:_bg-gray-100 hover:_text-gray-900 dark:_text-neutral-400 dark:hover:_bg-primary-100/5 dark:hover:_text-gray-50 contrast-more:_text-gray-900 contrast-more:dark:_text-gray-50 contrast-more:_border-transparent contrast-more:hover:_border-gray-900 contrast-more:dark:hover:_border-gray-50" href="/docs/device-app/explanation/psd/application-isolation">Application isolation</a></li></ul></div></div></li><li class=""><button class="_transition _items-center _justify-between _gap-2 _text-left _w-full _flex _rounded _px-2 _py-1.5 _text-sm _transition-colors [word-break:break-word] _cursor-pointer contrast-more:_border _text-gray-500 hover:_bg-gray-100 hover:_text-gray-900 dark:_text-neutral-400 dark:hover:_bg-primary-100/5 dark:hover:_text-gray-50 contrast-more:_text-gray-900 contrast-more:dark:_text-gray-50 contrast-more:_border-transparent contrast-more:hover:_border-gray-900 contrast-more:dark:hover:_border-gray-50" data-href="/docs/device-app/explanation/ledger-os" type="button" data-headlessui-state="">LedgerOS<svg viewBox="0 0 24 24" stroke="currentColor" fill="none" stroke-width="2" height="18" class="_shrink-0 _rounded-sm _p-0.5 hover:_bg-gray-800/5 dark:hover:_bg-gray-100/5 motion-reduce:*:_transition-none *:_origin-center *:_transition-transform *:rtl:_-rotate-180"><path d="M9 5l7 7-7 7" stroke-linecap="round" stroke-linejoin="round"></path></svg></button><div class="_transform-gpu _transition-all _ease-in-out motion-reduce:_transition-none _opacity-0 _overflow-hidden" style="height:0;transition-duration:300ms"><div><ul class="_flex _flex-col _gap-1 _relative before:_absolute before:_inset-y-1 before:_w-px before:_bg-gray-200 before:_content-[""] dark:before:_bg-neutral-800 ltr:_pl-3 ltr:before:_left-0 rtl:_pr-3 rtl:before:_right-0 _pt-1 ltr:_ml-3 rtl:_mr-3"><li class="_flex _flex-col _gap-1"><a class="nextra-focus _flex _rounded _px-2 _py-1.5 _text-sm _transition-colors [word-break:break-word] _cursor-pointer contrast-more:_border _text-gray-500 hover:_bg-gray-100 hover:_text-gray-900 dark:_text-neutral-400 dark:hover:_bg-primary-100/5 dark:hover:_text-gray-50 contrast-more:_text-gray-900 contrast-more:dark:_text-gray-50 contrast-more:_border-transparent contrast-more:hover:_border-gray-900 contrast-more:dark:hover:_border-gray-50" href="/docs/device-app/explanation/ledger-os/introduction">Introduction to Ledger OS</a></li><li class="_flex _flex-col _gap-1"><a class="nextra-focus _flex _rounded _px-2 _py-1.5 _text-sm _transition-colors [word-break:break-word] _cursor-pointer contrast-more:_border _text-gray-500 hover:_bg-gray-100 hover:_text-gray-900 dark:_text-neutral-400 dark:hover:_bg-primary-100/5 dark:hover:_text-gray-50 contrast-more:_text-gray-900 contrast-more:dark:_text-gray-50 contrast-more:_border-transparent contrast-more:hover:_border-gray-900 contrast-more:dark:hover:_border-gray-50" href="/docs/device-app/explanation/ledger-os/features">Ledger OS features</a></li><li class="_flex _flex-col _gap-1"><a class="nextra-focus _flex _rounded _px-2 _py-1.5 _text-sm _transition-colors [word-break:break-word] _cursor-pointer contrast-more:_border _text-gray-500 hover:_bg-gray-100 hover:_text-gray-900 dark:_text-neutral-400 dark:hover:_bg-primary-100/5 dark:hover:_text-gray-50 contrast-more:_text-gray-900 contrast-more:dark:_text-gray-50 contrast-more:_border-transparent contrast-more:hover:_border-gray-900 contrast-more:dark:hover:_border-gray-50" href="/docs/device-app/explanation/ledger-os/hardware-architecture">Hardware architecture</a></li><li class="_flex _flex-col _gap-1"><a class="nextra-focus _flex _rounded _px-2 _py-1.5 _text-sm _transition-colors [word-break:break-word] _cursor-pointer contrast-more:_border _text-gray-500 hover:_bg-gray-100 hover:_text-gray-900 dark:_text-neutral-400 dark:hover:_bg-primary-100/5 dark:hover:_text-gray-50 contrast-more:_text-gray-900 contrast-more:dark:_text-gray-50 contrast-more:_border-transparent contrast-more:hover:_border-gray-900 contrast-more:dark:hover:_border-gray-50" href="/docs/device-app/explanation/ledger-os/application-environment">Application environment</a></li></ul></div></div></li><li class=""><button class="_transition _items-center _justify-between _gap-2 _text-left _w-full _flex _rounded _px-2 _py-1.5 _text-sm _transition-colors [word-break:break-word] _cursor-pointer contrast-more:_border _text-gray-500 hover:_bg-gray-100 hover:_text-gray-900 dark:_text-neutral-400 dark:hover:_bg-primary-100/5 dark:hover:_text-gray-50 contrast-more:_text-gray-900 contrast-more:dark:_text-gray-50 contrast-more:_border-transparent contrast-more:hover:_border-gray-900 contrast-more:dark:hover:_border-gray-50" data-href="/docs/device-app/explanation/memory" type="button" data-headlessui-state="">Memory constraints<svg viewBox="0 0 24 24" stroke="currentColor" fill="none" stroke-width="2" height="18" class="_shrink-0 _rounded-sm _p-0.5 hover:_bg-gray-800/5 dark:hover:_bg-gray-100/5 motion-reduce:*:_transition-none *:_origin-center *:_transition-transform *:rtl:_-rotate-180"><path d="M9 5l7 7-7 7" stroke-linecap="round" stroke-linejoin="round"></path></svg></button><div class="_transform-gpu _transition-all _ease-in-out motion-reduce:_transition-none _opacity-0 _overflow-hidden" style="height:0;transition-duration:300ms"><div><ul class="_flex _flex-col _gap-1 _relative before:_absolute before:_inset-y-1 before:_w-px before:_bg-gray-200 before:_content-[""] dark:before:_bg-neutral-800 ltr:_pl-3 ltr:before:_left-0 rtl:_pr-3 rtl:before:_right-0 _pt-1 ltr:_ml-3 rtl:_mr-3"><li class="_flex _flex-col _gap-1"><a class="nextra-focus _flex _rounded _px-2 _py-1.5 _text-sm _transition-colors [word-break:break-word] _cursor-pointer contrast-more:_border _text-gray-500 hover:_bg-gray-100 hover:_text-gray-900 dark:_text-neutral-400 dark:hover:_bg-primary-100/5 dark:hover:_text-gray-50 contrast-more:_text-gray-900 contrast-more:dark:_text-gray-50 contrast-more:_border-transparent contrast-more:hover:_border-gray-900 contrast-more:dark:hover:_border-gray-50" href="/docs/device-app/explanation/memory/persistent-storage">Persistent storage</a></li><li class="_flex _flex-col _gap-1"><a class="nextra-focus _flex _rounded _px-2 _py-1.5 _text-sm _transition-colors [word-break:break-word] _cursor-pointer contrast-more:_border _text-gray-500 hover:_bg-gray-100 hover:_text-gray-900 dark:_text-neutral-400 dark:hover:_bg-primary-100/5 dark:hover:_text-gray-50 contrast-more:_text-gray-900 contrast-more:dark:_text-gray-50 contrast-more:_border-transparent contrast-more:hover:_border-gray-900 contrast-more:dark:hover:_border-gray-50" href="/docs/device-app/explanation/memory/position-independent-code">Position-independant code</a></li><li class="_flex _flex-col _gap-1"><a class="nextra-focus _flex _rounded _px-2 _py-1.5 _text-sm _transition-colors [word-break:break-word] _cursor-pointer contrast-more:_border _text-gray-500 hover:_bg-gray-100 hover:_text-gray-900 dark:_text-neutral-400 dark:hover:_bg-primary-100/5 dark:hover:_text-gray-50 contrast-more:_text-gray-900 contrast-more:dark:_text-gray-50 contrast-more:_border-transparent contrast-more:hover:_border-gray-900 contrast-more:dark:hover:_border-gray-50" href="/docs/device-app/explanation/memory/memory-alignment">Memory alignment</a></li></ul></div></div></li><li class="_flex _flex-col _gap-1"><a class="nextra-focus _flex _rounded _px-2 _py-1.5 _text-sm _transition-colors [word-break:break-word] _cursor-pointer contrast-more:_border _text-gray-500 hover:_bg-gray-100 hover:_text-gray-900 dark:_text-neutral-400 dark:hover:_bg-primary-100/5 dark:hover:_text-gray-50 contrast-more:_text-gray-900 contrast-more:dark:_text-gray-50 contrast-more:_border-transparent contrast-more:hover:_border-gray-900 contrast-more:dark:hover:_border-gray-50" href="/docs/device-app/explanation/security-specificities">Security specificities</a></li></ul></div></div></li><li class=""><button class="_transition _items-center _justify-between _gap-2 _text-left _w-full _flex _rounded _px-2 _py-1.5 _text-sm _transition-colors [word-break:break-word] _cursor-pointer contrast-more:_border _text-gray-500 hover:_bg-gray-100 hover:_text-gray-900 dark:_text-neutral-400 dark:hover:_bg-primary-100/5 dark:hover:_text-gray-50 contrast-more:_text-gray-900 contrast-more:dark:_text-gray-50 contrast-more:_border-transparent contrast-more:hover:_border-gray-900 contrast-more:dark:hover:_border-gray-50" data-href="/docs/device-app/submission-process" type="button" data-headlessui-state="">Submission process<svg viewBox="0 0 24 24" stroke="currentColor" fill="none" stroke-width="2" height="18" class="_shrink-0 _rounded-sm _p-0.5 hover:_bg-gray-800/5 dark:hover:_bg-gray-100/5 motion-reduce:*:_transition-none *:_origin-center *:_transition-transform *:rtl:_-rotate-180"><path d="M9 5l7 7-7 7" stroke-linecap="round" stroke-linejoin="round"></path></svg></button><div class="_transform-gpu _transition-all _ease-in-out motion-reduce:_transition-none _opacity-0 _overflow-hidden" style="height:0;transition-duration:300ms"><div><ul class="_flex _flex-col _gap-1 _relative before:_absolute before:_inset-y-1 before:_w-px before:_bg-gray-200 before:_content-[""] dark:before:_bg-neutral-800 ltr:_pl-3 ltr:before:_left-0 rtl:_pr-3 rtl:before:_right-0 _pt-1 ltr:_ml-3 rtl:_mr-3"><li class="_flex _flex-col _gap-1"><a class="nextra-focus _flex _rounded _px-2 _py-1.5 _text-sm _transition-colors [word-break:break-word] _cursor-pointer contrast-more:_border _text-gray-500 hover:_bg-gray-100 hover:_text-gray-900 dark:_text-neutral-400 dark:hover:_bg-primary-100/5 dark:hover:_text-gray-50 contrast-more:_text-gray-900 contrast-more:dark:_text-gray-50 contrast-more:_border-transparent contrast-more:hover:_border-gray-900 contrast-more:dark:hover:_border-gray-50" href="/docs/device-app/submission-process/process">App deployment process</a></li><li class=""><button class="_transition _items-center _justify-between _gap-2 _text-left _w-full _flex _rounded _px-2 _py-1.5 _text-sm _transition-colors [word-break:break-word] _cursor-pointer contrast-more:_border _text-gray-500 hover:_bg-gray-100 hover:_text-gray-900 dark:_text-neutral-400 dark:hover:_bg-primary-100/5 dark:hover:_text-gray-50 contrast-more:_text-gray-900 contrast-more:dark:_text-gray-50 contrast-more:_border-transparent contrast-more:hover:_border-gray-900 contrast-more:dark:hover:_border-gray-50" data-href="/docs/device-app/submission-process/deliverables" type="button" data-headlessui-state="">Deliverables<svg viewBox="0 0 24 24" stroke="currentColor" fill="none" stroke-width="2" height="18" class="_shrink-0 _rounded-sm _p-0.5 hover:_bg-gray-800/5 dark:hover:_bg-gray-100/5 motion-reduce:*:_transition-none *:_origin-center *:_transition-transform *:rtl:_-rotate-180"><path d="M9 5l7 7-7 7" stroke-linecap="round" stroke-linejoin="round"></path></svg></button><div class="_transform-gpu _transition-all _ease-in-out motion-reduce:_transition-none _opacity-0 _overflow-hidden" style="height:0;transition-duration:300ms"><div><ul class="_flex _flex-col _gap-1 _relative before:_absolute before:_inset-y-1 before:_w-px before:_bg-gray-200 before:_content-[""] dark:before:_bg-neutral-800 ltr:_pl-3 ltr:before:_left-0 rtl:_pr-3 rtl:before:_right-0 _pt-1 ltr:_ml-3 rtl:_mr-3"><li class="_flex _flex-col _gap-1"><a class="nextra-focus _flex _rounded _px-2 _py-1.5 _text-sm _transition-colors [word-break:break-word] _cursor-pointer contrast-more:_border _text-gray-500 hover:_bg-gray-100 hover:_text-gray-900 dark:_text-neutral-400 dark:hover:_bg-primary-100/5 dark:hover:_text-gray-50 contrast-more:_text-gray-900 contrast-more:dark:_text-gray-50 contrast-more:_border-transparent contrast-more:hover:_border-gray-900 contrast-more:dark:hover:_border-gray-50" href="/docs/device-app/submission-process/deliverables/security-audit">Security Audit</a></li><li class="_flex _flex-col _gap-1"><a class="nextra-focus _flex _rounded _px-2 _py-1.5 _text-sm _transition-colors [word-break:break-word] _cursor-pointer contrast-more:_border _text-gray-500 hover:_bg-gray-100 hover:_text-gray-900 dark:_text-neutral-400 dark:hover:_bg-primary-100/5 dark:hover:_text-gray-50 contrast-more:_text-gray-900 contrast-more:dark:_text-gray-50 contrast-more:_border-transparent contrast-more:hover:_border-gray-900 contrast-more:dark:hover:_border-gray-50" href="/docs/device-app/submission-process/deliverables/icons">Icons</a></li><li class="_flex _flex-col _gap-1"><a class="nextra-focus _flex _rounded _px-2 _py-1.5 _text-sm _transition-colors [word-break:break-word] _cursor-pointer contrast-more:_border _text-gray-500 hover:_bg-gray-100 hover:_text-gray-900 dark:_text-neutral-400 dark:hover:_bg-primary-100/5 dark:hover:_text-gray-50 contrast-more:_text-gray-900 contrast-more:dark:_text-gray-50 contrast-more:_border-transparent contrast-more:hover:_border-gray-900 contrast-more:dark:hover:_border-gray-50" href="/docs/device-app/submission-process/deliverables/companion-wallet">Companion wallet</a></li><li class="_flex _flex-col _gap-1"><a class="nextra-focus _flex _rounded _px-2 _py-1.5 _text-sm _transition-colors [word-break:break-word] _cursor-pointer contrast-more:_border _text-gray-500 hover:_bg-gray-100 hover:_text-gray-900 dark:_text-neutral-400 dark:hover:_bg-primary-100/5 dark:hover:_text-gray-50 contrast-more:_text-gray-900 contrast-more:dark:_text-gray-50 contrast-more:_border-transparent contrast-more:hover:_border-gray-900 contrast-more:dark:hover:_border-gray-50" href="/docs/device-app/submission-process/deliverables/ui-flow-video">Demo</a></li><li class="_flex _flex-col _gap-1"><a class="nextra-focus _flex _rounded _px-2 _py-1.5 _text-sm _transition-colors [word-break:break-word] _cursor-pointer contrast-more:_border _text-gray-500 hover:_bg-gray-100 hover:_text-gray-900 dark:_text-neutral-400 dark:hover:_bg-primary-100/5 dark:hover:_text-gray-50 contrast-more:_text-gray-900 contrast-more:dark:_text-gray-50 contrast-more:_border-transparent contrast-more:hover:_border-gray-900 contrast-more:dark:hover:_border-gray-50" href="/docs/device-app/submission-process/deliverables/documentation">Documentation</a></li><li class="_flex _flex-col _gap-1"><a class="nextra-focus _flex _rounded _px-2 _py-1.5 _text-sm _transition-colors [word-break:break-word] _cursor-pointer contrast-more:_border _text-gray-500 hover:_bg-gray-100 hover:_text-gray-900 dark:_text-neutral-400 dark:hover:_bg-primary-100/5 dark:hover:_text-gray-50 contrast-more:_text-gray-900 contrast-more:dark:_text-gray-50 contrast-more:_border-transparent contrast-more:hover:_border-gray-900 contrast-more:dark:hover:_border-gray-50" 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contrast-more:dark:_text-gray-50 contrast-more:_border-transparent contrast-more:hover:_border-gray-900 contrast-more:dark:hover:_border-gray-50" href="/docs/device-app/submission-process/deliverables/legal">Legal</a></li></ul></div></div></li><li class="_flex _flex-col _gap-1"><a class="nextra-focus _flex _rounded _px-2 _py-1.5 _text-sm _transition-colors [word-break:break-word] _cursor-pointer contrast-more:_border _text-gray-500 hover:_bg-gray-100 hover:_text-gray-900 dark:_text-neutral-400 dark:hover:_bg-primary-100/5 dark:hover:_text-gray-50 contrast-more:_text-gray-900 contrast-more:dark:_text-gray-50 contrast-more:_border-transparent contrast-more:hover:_border-gray-900 contrast-more:dark:hover:_border-gray-50" href="/docs/device-app/submission-process/submission-form">Submission</a></li><li class="_flex _flex-col _gap-1"><a class="nextra-focus _flex _rounded _px-2 _py-1.5 _text-sm _transition-colors [word-break:break-word] _cursor-pointer contrast-more:_border _text-gray-500 hover:_bg-gray-100 hover:_text-gray-900 dark:_text-neutral-400 dark:hover:_bg-primary-100/5 dark:hover:_text-gray-50 contrast-more:_text-gray-900 contrast-more:dark:_text-gray-50 contrast-more:_border-transparent contrast-more:hover:_border-gray-900 contrast-more:dark:hover:_border-gray-50" href="/docs/device-app/submission-process/maintenance">Maintenance</a></li></ul></div></div></li></ul></div></div></div><div class="nextra-sidebar-footer _sticky _bottom-0 _flex _items-center _gap-2 _py-4 _mx-3 _px-1" data-toggle-animation="off"><button class="_transition max-md:_hidden _rounded-md _p-2 _text-gray-600 dark:_text-gray-400" title="Hide sidebar" type="button" data-headlessui-state=""><svg viewBox="0 0 16 16" fill="currentColor" height="12" class=""><path d="M4.177 7.823l2.396-2.396A.25.25 0 017 5.604v4.792a.25.25 0 01-.427.177L4.177 8.177a.25.25 0 010-.354z"></path><path fill-rule="evenodd" d="M0 1.75C0 .784.784 0 1.75 0h12.5C15.216 0 16 .784 16 1.75v12.5A1.75 1.75 0 0114.25 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href="https://github.com/LedgerHQ/developer-portal/issues/new?title=Feedback%20for%20%E2%80%9CGetting%20started%E2%80%9D&labels=feedback" target="_blank" rel="noreferrer">Question? Give us feedback →</a><a class="nextra-focus _text-xs _font-medium _text-gray-600 dark:_text-gray-400 hover:_text-gray-800 dark:hover:_text-gray-200 contrast-more:_text-gray-700 contrast-more:dark:_text-gray-100" href="https://github.com/LedgerHQ/developer-portal/blob/main/pages/docs/device-app/getting-started.mdx">Edit this page</a><button>Copy page URL</button><button class="_transition _flex _items-center _gap-1.5 _whitespace-nowrap _opacity-0 _text-xs _font-medium _text-gray-600 dark:_text-gray-400 hover:_text-gray-800 dark:hover:_text-gray-200 contrast-more:_text-gray-700 contrast-more:dark:_text-gray-100" aria-hidden="true" type="button" disabled="" data-headlessui-state="disabled" data-disabled="">Scroll to top<svg viewBox="0 0 24 24" stroke="currentColor" fill="none" stroke-width="2" height="16" class="_-rotate-90 _border _rounded-full _border-current"><path d="M9 5l7 7-7 7" stroke-linecap="round" stroke-linejoin="round"></path></svg></button></div></div></nav><div id="reach-skip-nav"></div><article class="_w-full _break-words nextra-content _flex _min-h-[calc(100vh-var(--nextra-navbar-height))] _min-w-0 _justify-center _pb-8 _pr-[calc(env(safe-area-inset-right)-1.5rem)]"><main class="_w-full _min-w-0 _max-w-6xl _px-6 _pt-4 md:_px-12"><div class="nextra-breadcrumb _mt-1.5 _flex _items-center _gap-1 _overflow-hidden _text-sm _text-gray-500 dark:_text-gray-400 contrast-more:_text-current"><span class="_whitespace-nowrap _transition-colors _min-w-6 _overflow-hidden _text-ellipsis" title="Documentation">Documentation</span><svg viewBox="0 0 24 24" stroke="currentColor" fill="none" stroke-width="2" height="14" class="_shrink-0 rtl:_rotate-180"><path d="M9 5l7 7-7 7" stroke-linecap="round" stroke-linejoin="round"></path></svg><span class="_whitespace-nowrap _transition-colors _min-w-6 _overflow-hidden _text-ellipsis" title="Device App">Device App</span><svg viewBox="0 0 24 24" stroke="currentColor" fill="none" stroke-width="2" height="14" class="_shrink-0 rtl:_rotate-180"><path d="M9 5l7 7-7 7" stroke-linecap="round" stroke-linejoin="round"></path></svg><span class="_whitespace-nowrap _transition-colors _font-medium _text-gray-700 contrast-more:_font-bold contrast-more:_text-current dark:_text-gray-100 contrast-more:dark:_text-current" title="Getting started">Getting started</span></div><h1 class="_mt-2 _text-4xl _font-bold _tracking-tight _text-slate-900 dark:_text-slate-100">Getting started</h1> <p class="[&:not(:first-child)]:_mt-6 _leading-7">In this section of the Developer Portal, you will find the resources to build, test and submit C and Rust apps, Ethereum plugins and Cloned coins apps, compatible with all Ledger devices (Ledger Nano S Plus, Nano X, Stax and Flex).</p> <div style="width:100%" class="center"><div style="position:relative;padding-bottom:56.25%;padding-top:0;height:0"><iframe title="Ledger Dev Journey" frameBorder="0" style="position:absolute;top:0;left:0;width:100%;height:100%" src="https://view.genial.ly/671a5436ddba93584bafa288" type="text/html" allowscriptaccess="always" allowfullscreen="" scrolling="yes" allownetworking="all"></iframe></div></div> <h2 id="things-to-know-before-starting" class="_font-semibold _tracking-tight _text-slate-900 dark:_text-slate-100 _mt-10 _border-b _pb-1 _text-3xl _border-neutral-200/70 contrast-more:_border-neutral-400 dark:_border-primary-100/10 contrast-more:dark:_border-neutral-400">Things to know before starting<a href="#things-to-know-before-starting" class="nextra-focus subheading-anchor" aria-label="Permalink for this section"></a></h2> <h3 id="contact-us" class="_font-semibold _tracking-tight _text-slate-900 dark:_text-slate-100 _mt-8 _text-2xl">Contact us<a href="#contact-us" class="nextra-focus subheading-anchor" aria-label="Permalink for this section"></a></h3> <p class="[&:not(:first-child)]:_mt-6 _leading-7">We recommend you get in touch with us before starting your development process.</p> <ul class="[:is(ol,ul)_&]:_my-3 [&:not(:first-child)]:_mt-6 _list-disc ltr:_ml-6 rtl:_mr-6"> <li class="_my-2">For general device applications, post a message in the #dev-support channel <a class="nextra-focus _text-primary-600 _underline hover:_no-underline _decoration-from-font [text-underline-position:from-font]" href="https://discord.gg/Ledger" target="_blank" rel="noreferrer">on our Discord server</a>.</li> <li class="_my-2">For Ethereum plugins, if you are not already in contact with one of our teams, fill in <a class="nextra-focus _text-primary-600 _underline hover:_no-underline _decoration-from-font [text-underline-position:from-font]" href="https://docs.google.com/forms/d/e/1FAIpQLSd2e4BAfuZJOUYKhqcxMvMGNY12ShZ-UG5Lu0Se8AIVdlu2lA/viewform" target="_blank" rel="noreferrer">this form</a> and contact us at <a class="nextra-focus _text-primary-600 _underline hover:_no-underline _decoration-from-font [text-underline-position:from-font]" href="mailto:discover@ledger.fr">discover@ledger.fr</a>.</li> </ul> <p class="[&:not(:first-child)]:_mt-6 _leading-7">This will ensure you do not lose time and get on the right track.</p> <h3 id="security-audit" class="_font-semibold _tracking-tight _text-slate-900 dark:_text-slate-100 _mt-8 _text-2xl">Security audit<a href="#security-audit" class="nextra-focus subheading-anchor" aria-label="Permalink for this section"></a></h3> <p class="[&:not(:first-child)]:_mt-6 _leading-7">Before publication, an application must go through a functional and security audit. This security audit is made by one of our parterns at your expense.</p> <p class="[&:not(:first-child)]:_mt-6 _leading-7">When your device app is ready to go through the security audit, you can contact one of our partners:</p> <ul class="[:is(ol,ul)_&]:_my-3 [&:not(:first-child)]:_mt-6 _list-disc ltr:_ml-6 rtl:_mr-6"> <li class="_my-2"><a class="nextra-focus _text-primary-600 _underline hover:_no-underline _decoration-from-font [text-underline-position:from-font]" href="https://www.kudelski-iot.com/services-and-systems/ledger-security-audit" target="_blank" rel="noreferrer">Kudelski IoT</a>.</li> <li class="_my-2"><a class="nextra-focus _text-primary-600 _underline hover:_no-underline _decoration-from-font [text-underline-position:from-font]" href="https://www.quarkslab.com/" target="_blank" rel="noreferrer">Quarkslab</a>, contact them <a class="nextra-focus _text-primary-600 _underline hover:_no-underline _decoration-from-font [text-underline-position:from-font]" href="mailto:qb_ledger@quarkslab.com">here</a>.</li> </ul> <p class="[&:not(:first-child)]:_mt-6 _leading-7">They both follow Ledger specifications and will provide a full report with potential vulnerabilites.</p> <div class="nextra-callout _overflow-x-auto _mt-6 _flex _rounded-lg _border _py-2 ltr:_pr-4 rtl:_pl-4 contrast-more:_border-current contrast-more:dark:_border-current _border-blue-200 _bg-blue-100 _text-blue-900 dark:_border-blue-200/30 dark:_bg-blue-900/30 dark:_text-blue-200"><div class="_select-none _text-xl ltr:_pl-3 ltr:_pr-2 rtl:_pr-3 rtl:_pl-2" style="font-family:"Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol"">ℹ️</div><div class="_w-full _min-w-0 _leading-7"><p class="[&:not(:first-child)]:_mt-6 _leading-7">Ensure your device app meets all necessary requirements and is fully tested before initiating a security audit with our partners</p></div></div> <p class="[&:not(:first-child)]:_mt-6 _leading-7">Important aspects of your agreement:</p> <ul class="[:is(ol,ul)_&]:_my-3 [&:not(:first-child)]:_mt-6 _list-disc ltr:_ml-6 rtl:_mr-6"> <li class="_my-2">Time: When the auditors will be able to start the review.</li> <li class="_my-2">Cost: The external audit will be entirely at your expense.</li> <li class="_my-2">Maintenance: You must include a clause for updates or sign a new contract for any major update. If you don’t, your app will not be updated by Ledger and might be delisted from My Ledger apps store if it is breaking.</li> </ul> <div class="nextra-callout _overflow-x-auto _mt-6 _flex _rounded-lg _border _py-2 ltr:_pr-4 rtl:_pl-4 contrast-more:_border-current contrast-more:dark:_border-current _border-blue-200 _bg-blue-100 _text-blue-900 dark:_border-blue-200/30 dark:_bg-blue-900/30 dark:_text-blue-200"><div class="_select-none _text-xl ltr:_pl-3 ltr:_pr-2 rtl:_pr-3 rtl:_pl-2" style="font-family:"Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol"">ℹ️</div><div class="_w-full _min-w-0 _leading-7"><p class="[&:not(:first-child)]:_mt-6 _leading-7">Ledger is not a stakeholder in the contract between you and our partners.</p></div></div> <h2 id="need-to-hire-a-team-to-develop-your-device-app" class="_font-semibold _tracking-tight _text-slate-900 dark:_text-slate-100 _mt-10 _border-b _pb-1 _text-3xl _border-neutral-200/70 contrast-more:_border-neutral-400 dark:_border-primary-100/10 contrast-more:dark:_border-neutral-400">Need to hire a team to develop your device app?<a href="#need-to-hire-a-team-to-develop-your-device-app" class="nextra-focus subheading-anchor" aria-label="Permalink for this section"></a></h2> <p class="[&:not(:first-child)]:_mt-6 _leading-7">You need an device app but don’t have an application developer in your team?</p> <p class="[&:not(:first-child)]:_mt-6 _leading-7">The following companies have experience building Device Apps, feel free to contact them to talk about your project:</p> <ul class="[:is(ol,ul)_&]:_my-3 [&:not(:first-child)]:_mt-6 _list-disc ltr:_ml-6 rtl:_mr-6"> <li class="_my-2"><a class="nextra-focus _text-primary-600 _underline hover:_no-underline _decoration-from-font [text-underline-position:from-font]" href="https://blooo.io/en/ledger-wallet-integration/" target="_blank" rel="noreferrer">Blooo</a></li> <li class="_my-2"><a class="nextra-focus _text-primary-600 _underline hover:_no-underline _decoration-from-font [text-underline-position:from-font]" href="https://hoodies.team/" target="_blank" rel="noreferrer">Hoodies</a></li> <li class="_my-2"><a class="nextra-focus _text-primary-600 _underline hover:_no-underline _decoration-from-font [text-underline-position:from-font]" href="https://obsidian.systems/" target="_blank" rel="noreferrer">Obsidian Systems</a></li> <li class="_my-2"><a class="nextra-focus _text-primary-600 _underline hover:_no-underline _decoration-from-font [text-underline-position:from-font]" href="https://vacuumlabs.com/ledger" target="_blank" rel="noreferrer">Vacuumlabs</a></li> <li class="_my-2"><a class="nextra-focus _text-primary-600 _underline hover:_no-underline _decoration-from-font [text-underline-position:from-font]" href="https://zondax.ch/" target="_blank" rel="noreferrer">Zondax</a></li> </ul> <h2 id="tools-and-boilerplates" class="_font-semibold _tracking-tight _text-slate-900 dark:_text-slate-100 _mt-10 _border-b _pb-1 _text-3xl _border-neutral-200/70 contrast-more:_border-neutral-400 dark:_border-primary-100/10 contrast-more:dark:_border-neutral-400">Tools and boilerplates<a href="#tools-and-boilerplates" class="nextra-focus subheading-anchor" aria-label="Permalink for this section"></a></h2> <ul class="[:is(ol,ul)_&]:_my-3 [&:not(:first-child)]:_mt-6 _list-disc ltr:_ml-6 rtl:_mr-6"> <li class="_my-2">To learn how to quickstart a project with the Ledger VS code extension, read <a class="nextra-focus _text-primary-600 _underline hover:_no-underline _decoration-from-font [text-underline-position:from-font]" href="/docs/device-app/beginner/vscode-extension">this guide</a>. The extension makes the environment set up, the app building, and the tests very easy.</li> <li class="_my-2">To start developing your project with the boilerplates, go in the How-to section in “Integration walkthroughs” and you will find <a class="nextra-focus _text-primary-600 _underline hover:_no-underline _decoration-from-font [text-underline-position:from-font]" href="/docs/device-app/integration/how-to/c-boilerplate">the C Boilerplate</a>, <a class="nextra-focus _text-primary-600 _underline hover:_no-underline _decoration-from-font [text-underline-position:from-font]" href="/docs/device-app/integration/how-to/rust-boilerplate">the Rust Boilerplate</a>, <a class="nextra-focus _text-primary-600 _underline hover:_no-underline _decoration-from-font [text-underline-position:from-font]" href="/docs/device-app/integration/how-to/plugin">the Ethereum plugin doc</a> and <a class="nextra-focus _text-primary-600 _underline hover:_no-underline _decoration-from-font [text-underline-position:from-font]" href="/docs/device-app/integration/how-to/clone">the Cloned coins apps integration process</a>.</li> </ul> <h2 id="technical-information" class="_font-semibold _tracking-tight _text-slate-900 dark:_text-slate-100 _mt-10 _border-b _pb-1 _text-3xl _border-neutral-200/70 contrast-more:_border-neutral-400 dark:_border-primary-100/10 contrast-more:dark:_border-neutral-400">Technical information<a href="#technical-information" class="nextra-focus subheading-anchor" aria-label="Permalink for this section"></a></h2> <h3 id="languages" class="_font-semibold _tracking-tight _text-slate-900 dark:_text-slate-100 _mt-8 _text-2xl">Languages<a href="#languages" class="nextra-focus subheading-anchor" aria-label="Permalink for this section"></a></h3> <table class="_not-prose _block _overflow-x-auto nextra-scrollbar [&:not(:first-child)]:_mt-6 _p-0"><thead><tr class="_m-0 _border-t _border-gray-300 _p-0 dark:_border-gray-600 even:_bg-gray-100 even:dark:_bg-gray-600/20"><th class="_m-0 _border _border-gray-300 _px-4 _py-2 _font-semibold dark:_border-gray-600">Component</th><th class="_m-0 _border _border-gray-300 _px-4 _py-2 _font-semibold dark:_border-gray-600">Developing language</th></tr></thead><tbody><tr class="_m-0 _border-t _border-gray-300 _p-0 dark:_border-gray-600 even:_bg-gray-100 even:dark:_bg-gray-600/20"><td class="_m-0 _border _border-gray-300 _px-4 _py-2 dark:_border-gray-600"><a class="nextra-focus _text-primary-600 _underline hover:_no-underline _decoration-from-font [text-underline-position:from-font]" href="/docs/device-app/explanation/ledger-os/introduction">Ledger OS</a></td><td class="_m-0 _border _border-gray-300 _px-4 _py-2 dark:_border-gray-600"><code class="nextra-code" dir="ltr">C</code></td></tr><tr class="_m-0 _border-t _border-gray-300 _p-0 dark:_border-gray-600 even:_bg-gray-100 even:dark:_bg-gray-600/20"><td class="_m-0 _border _border-gray-300 _px-4 _py-2 dark:_border-gray-600">Applications</td><td class="_m-0 _border _border-gray-300 _px-4 _py-2 dark:_border-gray-600"><code class="nextra-code" dir="ltr">C</code> or <code class="nextra-code" dir="ltr">Rust</code></td></tr><tr class="_m-0 _border-t _border-gray-300 _p-0 dark:_border-gray-600 even:_bg-gray-100 even:dark:_bg-gray-600/20"><td class="_m-0 _border _border-gray-300 _px-4 _py-2 dark:_border-gray-600">Plugins</td><td class="_m-0 _border _border-gray-300 _px-4 _py-2 dark:_border-gray-600"><code class="nextra-code" dir="ltr">C</code></td></tr><tr class="_m-0 _border-t _border-gray-300 _p-0 dark:_border-gray-600 even:_bg-gray-100 even:dark:_bg-gray-600/20"><td class="_m-0 _border _border-gray-300 _px-4 _py-2 dark:_border-gray-600">Tools (including tests)</td><td class="_m-0 _border _border-gray-300 _px-4 _py-2 dark:_border-gray-600"><code class="nextra-code" dir="ltr">Python</code> (mostly)</td></tr></tbody></table> <div class="nextra-callout _overflow-x-auto _mt-6 _flex _rounded-lg _border _py-2 ltr:_pr-4 rtl:_pl-4 contrast-more:_border-current contrast-more:dark:_border-current _border-blue-200 _bg-blue-100 _text-blue-900 dark:_border-blue-200/30 dark:_bg-blue-900/30 dark:_text-blue-200"><div class="_select-none _text-xl ltr:_pl-3 ltr:_pr-2 rtl:_pr-3 rtl:_pl-2" style="font-family:"Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol"">ℹ️</div><div class="_w-full _min-w-0 _leading-7"><p class="[&:not(:first-child)]:_mt-6 _leading-7">Even though you can develop a device app either in C or Rust, bear in mind that at the moment, the Rust SDK only has Nano S/S+/X devices support.</p></div></div> <h3 id="data-formats" class="_font-semibold _tracking-tight _text-slate-900 dark:_text-slate-100 _mt-8 _text-2xl">Data formats<a href="#data-formats" class="nextra-focus subheading-anchor" aria-label="Permalink for this section"></a></h3> <table class="_not-prose _block _overflow-x-auto nextra-scrollbar [&:not(:first-child)]:_mt-6 _p-0"><thead><tr class="_m-0 _border-t _border-gray-300 _p-0 dark:_border-gray-600 even:_bg-gray-100 even:dark:_bg-gray-600/20"><th class="_m-0 _border _border-gray-300 _px-4 _py-2 _font-semibold dark:_border-gray-600">Component</th><th class="_m-0 _border _border-gray-300 _px-4 _py-2 _font-semibold dark:_border-gray-600">Format</th></tr></thead><tbody><tr class="_m-0 _border-t _border-gray-300 _p-0 dark:_border-gray-600 even:_bg-gray-100 even:dark:_bg-gray-600/20"><td class="_m-0 _border _border-gray-300 _px-4 _py-2 dark:_border-gray-600">CI (GitHub Workflows)</td><td class="_m-0 _border _border-gray-300 _px-4 _py-2 dark:_border-gray-600"><code class="nextra-code" dir="ltr">YAML</code></td></tr><tr class="_m-0 _border-t _border-gray-300 _p-0 dark:_border-gray-600 even:_bg-gray-100 even:dark:_bg-gray-600/20"><td class="_m-0 _border _border-gray-300 _px-4 _py-2 dark:_border-gray-600"><code class="nextra-code" dir="ltr">ledger_app.toml</code> manifests</td><td class="_m-0 _border _border-gray-300 _px-4 _py-2 dark:_border-gray-600"><code class="nextra-code" dir="ltr">TOML</code></td></tr><tr class="_m-0 _border-t _border-gray-300 _p-0 dark:_border-gray-600 even:_bg-gray-100 even:dark:_bg-gray-600/20"><td class="_m-0 _border _border-gray-300 _px-4 _py-2 dark:_border-gray-600">App database</td><td class="_m-0 _border _border-gray-300 _px-4 _py-2 dark:_border-gray-600"><code class="nextra-code" dir="ltr">JSON</code></td></tr></tbody></table><div class="_mt-16"></div><div class="_mb-8 _flex _items-center _border-t _pt-8 dark:_border-neutral-800 contrast-more:_border-neutral-400 dark:contrast-more:_border-neutral-400 print:_hidden"><a title="Quickstart your project with the Ledger VScode extension" class="nextra-focus _text-gray-600 dark:_text-gray-400 hover:_text-gray-800 dark:hover:_text-gray-200 contrast-more:_text-gray-700 contrast-more:dark:_text-gray-100 _flex _max-w-[50%] _items-center _gap-1 _py-4 _text-base _font-medium _transition-colors [word-break:break-word] md:_text-lg ltr:_ml-auto ltr:_pl-4 ltr:_text-right rtl:_mr-auto rtl:_pr-4 rtl:_text-left" href="/docs/device-app/beginner/vscode-extension">Quickstart your project with the Ledger VScode extension<svg viewBox="0 0 24 24" stroke="currentColor" fill="none" stroke-width="2" class="_inline _h-5 _shrink-0 rtl:_rotate-180"><path d="M9 5l7 7-7 7" stroke-linecap="round" stroke-linejoin="round"></path></svg></a></div></main></article></div><div class="bg-black"><div class="h-[1px] w-full bg-white"></div><div class="max-w-[1440px] mx-auto"><div class="py-20 px-4 md:px-28 z-10"><div class="flex flex-col md:flex-row gap-6 md:gap-16"><div class="flex flex-col gap-9 md:w-60"><a class="relative h-10 w-28" href="https://www.ledger.com"><img alt="Ledger" loading="lazy" decoding="async" data-nimg="fill" style="position:absolute;height:100%;width:100%;left:0;top:0;right:0;bottom:0;color:transparent" src="/homepage/ledger-logo-long-white.svg"/></a><div class="text-p-caption text-grey-600">Copyright © Ledger SAS. 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