NEO3 Application

This is the NEO3 ledger application for the Nano S/X. It is based on Ledgers Boilerplate app.

Prerequisite

You can follow Ledgers Getting Started guide to setup your environment to build and load the app onto your device. At the time of writing their setup documentation was found to be convoluted, outdated and at times missing steps. The setup environment document hopefully solves this.

BOLOS_ENV=/opt/bolos-devenv

and do the same with BOLOS_SDK environment variable

BOLOS_SDK=/opt/nanos-secure-sdk

Compilation

make DEBUG=1  # compile optionally with PRINTF
make load     # load the app on the Nano using ledgerblue

Documentation

High level documentation such as APDU, commands and transaction serialization are included in developer documentation which can be generated with doxygen

doxygen .doxygen/Doxyfile

the process outputs HTML and LaTeX documentations in doc/html and doc/latex folders.

Tests & Continuous Integration

The flow processed in GitHub Actions is the following:

• Code formatting with clang-format
• Compilation of the application for Ledger Nano S in ledger-app-builder
• Unit tests of C functions with cmocka (see unit-tests/)
• End-to-end tests with Speculos emulator (see tests/)
• Code coverage with gcov/lcov and upload to codecov.io
• Documentation generation with doxygen

It outputs 4 artifacts:

• boilerplate-app-debug within output files of the compilation process in debug mode
• speculos-log within APDU command/response when executing end-to-end tests
• code-coverage within HTML details of code coverage
• documentation within HTML auto-generated documentation

Special thanks

A special thanks goes out to Edouard Merle of Ledger for answering support questions, follow up to bug reports and assisting in tracking down an issue ❤️.