public PSBT SignAll(ExtKey masterKey, SigHash sigHash = SigHash.All)
{
if (masterKey == null)
{
throw new ArgumentNullException(nameof(masterKey));
}
DerivationCache derivation = new DerivationCache(masterKey);
foreach (var o in Inputs)
{
o.TrySign(masterKey, sigHash, derivation);
}
return(this);
}
internal void TrySign(ExtKey masterKey, SigHash sigHash, DerivationCache derivation)
{
foreach (var hdk in HDKeyPaths)
{
var pubkey = hdk.Key;
var keyPath = hdk.Value.Item2;
var fp = hdk.Value.Item1;
if ((fp == masterKey.GetPublicKey().GetHDFingerPrint() || fp == default) &&
(derivation.Derive(keyPath) is ExtKey k && k.GetPublicKey() == pubkey))
{
Sign(k.PrivateKey, sigHash);
}
}
}
/// <summary>
/// Add keypath information to this PSBT for each input or output involving it
/// </summary>
/// <param name="masterKey">The master key of the keypaths</param>
/// <param name="paths">The path of the public keys with their expected scriptPubKey</param>
/// <returns>This PSBT</returns>
public PSBT AddKeyPath(IHDKey masterKey, params Tuple <KeyPath, Script>[] paths)
{
if (masterKey == null)
{
throw new ArgumentNullException(nameof(masterKey));
}
if (paths == null)
{
throw new ArgumentNullException(nameof(paths));
}
DerivationCache derivationCache = new DerivationCache(masterKey);
foreach (var path in paths)
{
var key = derivationCache.Derive(path.Item1);
AddKeyPath(masterKey.GetPublicKey().GetHDFingerPrint(), key.GetPublicKey(), path.Item1, path.Item2);
}
return(this);
}
/// <summary>
/// Get the balance change if you were signing this transaction.
/// </summary>
/// <returns>The balance change</returns>
public Money GetBalance(IHDKey masterKey)
{
if (masterKey == null)
{
throw new ArgumentNullException(nameof(masterKey));
}
var masterFP = masterKey.GetPublicKey().GetHDFingerPrint();
Money total = Money.Zero;
DerivationCache derivationCache = new DerivationCache(masterKey);
foreach (var o in Inputs.OfType <PSBTCoin>().Concat(Outputs))
{
var amount = o.GetCoin()?.Amount;
if (amount == null)
{
continue;
}
if (o is PSBTInput)
{
amount = -amount;
}
foreach (var hdk in o.HDKeyPaths)
{
var pubkey = hdk.Key;
var keyPath = hdk.Value.Item2;
var fp = hdk.Value.Item1;
if ((fp == masterKey.GetPublicKey().GetHDFingerPrint() || fp == default) &&
(derivationCache.Derive(keyPath).GetPublicKey() == pubkey))
{
total += amount;
}
}
}
return(total);
}
