Hardware Bitcoin Wallet
Initially created by [someone42] (https://github.com/someone42/hardware-bitcoin-wallet) and modified for the juno-r2 board making use of the TrustZone.
A minimal Bitcoin (see http://bitcoin.org/ ) wallet for embedded devices. The wallet is responsible for parsing transactions, prompting the user and signing transactions. In order to do this, the wallet also stores and manages private keys, but it does not store anything else. The wallet is not aware of the blockchain and communicates with a BitCoin client ("the host" from the point of view of the code here) via. a point-to-point stream-based link.