/// <summary>
/// Gets the signed transaction data from the Ledger wallet.
/// </summary>
/// <param name="transaction"> The transaction to sign. </param>
/// <param name="path"> The path of the address to sign the transaction with. </param>
/// <param name="onSignatureRequestSent"> Action to call once the signature request has been sent. </param>
/// <returns> Task returning the SignedTransactionDataHolder instance. </returns>
protected override async Task <SignedTransactionDataHolder> GetSignedTransactionData(Transaction transaction, string path, Action onSignatureRequestSent)
{
var ledgerManager = LedgerConnector.GetWindowsConnectedLedger();
var address = ledgerManager == null
? null
: (await ledgerManager.GetPublicKeyResponse(Wallet.ELECTRUM_LEDGER_PATH.Replace("x", "0"), false, false).ConfigureAwait(false))?.Address;
// Don't sign transaction if app is not Ethereum, or if the first address doesn't match the first address of the opened Ledger wallet.
if (string.IsNullOrEmpty(address) || !address.EqualsIgnoreCase(addresses[1][0]))
{
return(null);
}
var addressIndex = path.Count(c => c == '/') - 1;
var derivationData = Helpers.GetDerivationPathData(path);
var request = new EthereumAppSignTransactionRequest(derivationData.Concat(transaction.GetRLPEncoded()).ToArray());
onSignatureRequestSent?.Invoke();
var response = await ledgerManager.SendRequestAsync <EthereumAppSignTransactionResponse, EthereumAppSignTransactionRequest>(request).ConfigureAwait(false);
if (!response.IsSuccess)
{
return(new SignedTransactionDataHolder());
}
return(new SignedTransactionDataHolder {
signed = true, v = response.SignatureV, r = response.SignatureR, s = response.SignatureS
});
}
public async Task <ECDSASignature> SignAsync(byte[] hash)
{
var path = GetPath();
var firstRequest = new EthereumAppSignTransactionRequest(true, path.Concat(hash).ToArray());
var response = await LedgerManager.SendRequestAsync <EthereumAppSignTransactionResponse, EthereumAppSignTransactionRequest>(firstRequest);
var signature = ECDSASignatureFactory.FromComponents(response.SignatureR, response.SignatureS);
signature.V = new BigInteger(response.SignatureV).ToBytesForRLPEncoding();
return(signature);
}
public async Task <ECDSASignature> SignAsync(byte[] hash)
{
var ledgerManager = await GetLedger();
ledgerManager.SetCoinNumber(60);
var derivationData = Helpers.GetDerivationPathData(ledgerManager.CurrentCoin.App, ledgerManager.CurrentCoin.CoinNumber, 0, 0, false, ledgerManager.CurrentCoin.IsSegwit);
// Create base class like GetPublicKeyResponseBase and make the method more like GetAddressAsync
var firstRequest = new EthereumAppSignTransactionRequest(derivationData.Concat(hash).ToArray());
var response = await ledgerManager.SendRequestAsync <EthereumAppSignTransactionResponse, EthereumAppSignTransactionRequest>(firstRequest);
var signature = new ECDSASignature(new Org.BouncyCastle.Math.BigInteger(response.SignatureR), new Org.BouncyCastle.Math.BigInteger(response.SignatureS));
signature.V = new BigInteger(response.SignatureV).ToBytesForRLPEncoding();
return(signature);
}
