This directory contains the SDK for ST31 applications development
Make sure to use the tagged version matching your development environment as syscalls IDs might have changed
On firmware version 1.6+, 2 SDK branches are temporarily available
- 
The main branch tracks the updated SDK merging Nano X UI features (Flow) currently only used for a few appilcations (Bitcoin, Ethereum, SSH, U2F)
 - 
The og- branches track SDKs compatible with 1.5.5
 
Developers are encouraged to migrate their application to the updated SDK to create portable applications between Nano S and Nano X devices