near-ledger-rs

It is NEAR <-> Ledger transport

Provides a set of commands that can be executed to communicate with NEAR App installed on Ledger device:

• Read PublicKey from Ledger device by HD Path
• Sign a Transaction

Examples

Get PublicKey from Ledger

```rust use nearledger::getpublic_key; use slip10::BIP32Path;

let hdpath = BIP32Path::fromstr("44'/397'/0'/0'/1'").unwrap(); let publickey = match getpublickey(hdpath) .await .maperr(|nearledgererror| { panic!( "An error occurred while getting PublicKey from Ledger device: {:?}", nearledger_error, ) })?; ```

Trick

To convert the answer into near_crypto::PublicKey do:

rust near_crypto::PublicKey::ED25519( near_crypto::ED25519PublicKey::from( public_key.to_bytes(), ) )

How to sign a transaction

rust use near_ledger::sign_transaction; use borsh::BorshSerializer; use slip10::BIP32Path; asyn fn main() { let hd_path = BIP32Path::from_str("44'/397'/0'/0'/1'").unwrap(); let borsh_transaction = near_unsigned_transaction.try_to_vec().unwrap(); let signature = match sign_transaction(borsh_transaction, hd_path) .await .map_err(|near_ledger_error| { panic!( "An error occurred while getting PublicKey from Ledger device: {:?}", near_ledger_error, ) })?;

Trick

To convert the answer into near_crypto::Signature do:

rust near_crypto::Signature::from_parts(near_crypto::KeyType::ED25519, &signature) .expect("Signature is not expected to fail on deserialization")