public static Credentials Create(string copayerName, Network network)
{
var newCopayerKey = new NBitcoin.ExtKey();
var walletKey = new NBitcoin.Key();
var copayerXPrivKey = newCopayerKey.ToString(network);
return(Credentials.FromExtendedPrivateKey(copayerXPrivKey, walletKey, copayerName, network));
}
public ExtKey Derive(uint nChild)
{
var result = new ExtKey();
result.nDepth = (byte)(nDepth + 1);
result.vchFingerprint = key.PubKey.ID.ToBytes().Take(result.vchFingerprint.Length).ToArray();
result.nChild = nChild;
result.key = key.Derivate(this.vchChainCode, nChild, out result.vchChainCode);
return result;
}
static void Generate()
{
var k = new NBitcoin.ExtKey();
Console.Out.WriteLine("Ext priv");
Console.Out.WriteLine(k.ToString(NBitcoin.Network.TestNet));
Console.Out.WriteLine("Ext pub");
Console.Out.WriteLine(k.Neuter());
var pk = k.PrivateKey;
Console.Out.WriteLine("PrivK");
Console.Out.WriteLine(pk.ToString(NBitcoin.Network.TestNet));
Console.Out.WriteLine("Public");
Console.Out.WriteLine(pk.PubKey.ToString());
}
public PSBT SignAll(ExtKey extkey, KeyPath keyPath, SigHash sigHash)
{
if (extkey == null)
{
throw new ArgumentNullException(nameof(extkey));
}
if (keyPath == null)
{
throw new ArgumentNullException(nameof(keyPath));
}
var privKey = extkey.Derive(keyPath).PrivateKey;
foreach (var input in this.Inputs)
{
if (input.HDKeyPaths.TryGetValue(privKey.PubKey, out var v) &&
v.Item1 != default &&
v.Item1 == extkey.PrivateKey.PubKey.GetHDFingerPrint())
{
input.Sign(privKey);
}
}
return(this);
}
public ExtKey GetParentExtKey(ExtPubKey parent)
{
if (parent == null)
{
throw new ArgumentNullException("parent");
}
if (Depth == 0)
{
throw new InvalidOperationException("This ExtKey is the root key of the HD tree");
}
if (IsHardened)
{
throw new InvalidOperationException("This private key is hardened, so you can't get its parent");
}
var expectedFingerPrint = parent.CalculateChildFingerprint();
if (parent.Depth != this.Depth - 1 || !expectedFingerPrint.SequenceEqual(vchFingerprint))
{
throw new ArgumentException("The parent ExtPubKey is not the immediate parent of this ExtKey", "parent");
}
byte[] l = null;
byte[] ll = new byte[32];
byte[] lr = new byte[32];
var pubKey = parent.PubKey.ToBytes();
l = Hashes.BIP32Hash(parent.vchChainCode, nChild, pubKey[0], pubKey.SafeSubarray(1));
Array.Copy(l, ll, 32);
Array.Copy(l, 32, lr, 0, 32);
var ccChild = lr;
BigInteger parse256LL = new BigInteger(1, ll);
BigInteger N = ECKey.CURVE.N;
if (!ccChild.SequenceEqual(vchChainCode))
{
throw new InvalidOperationException("The derived chain code of the parent is not equal to this child chain code");
}
var keyBytes = PrivateKey.ToBytes();
var key = new BigInteger(1, keyBytes);
BigInteger kPar = key.Add(parse256LL.Negate()).Mod(N);
var keyParentBytes = kPar.ToByteArrayUnsigned();
if (keyParentBytes.Length < 32)
{
keyParentBytes = new byte[32 - keyParentBytes.Length].Concat(keyParentBytes).ToArray();
}
var parentExtKey = new ExtKey
{
vchChainCode = parent.vchChainCode,
nDepth = parent.Depth,
vchFingerprint = parent.Fingerprint,
nChild = parent.nChild,
key = new Key(keyParentBytes)
};
return(parentExtKey);
}
public ExtKey Derive(KeyPath derivation)
{
ExtKey result = this;
return(derivation.Indexes.Aggregate(result, (current, index) => current.Derive(index)));
}
public bool IsParentOf(ExtKey childKey)
{
return(childKey.IsChildOf(this));
}
public ExtKey GetParentExtKey(ExtPubKey parent)
{
if(parent == null)
throw new ArgumentNullException("parent");
if(Depth == 0)
throw new InvalidOperationException("This ExtKey is the root key of the HD tree");
if(IsHardened)
throw new InvalidOperationException("This private key is hardened, so you can't get its parent");
var expectedFingerPrint = parent.CalculateChildFingerprint();
if(parent.Depth != this.Depth - 1 || !expectedFingerPrint.SequenceEqual(vchFingerprint))
throw new ArgumentException("The parent ExtPubKey is not the immediate parent of this ExtKey", "parent");
byte[] l = null;
byte[] ll = new byte[32];
byte[] lr = new byte[32];
var pubKey = parent.PubKey.ToBytes();
l = Hashes.BIP32Hash(parent.vchChainCode, nChild, pubKey[0], pubKey.SafeSubarray(1));
Array.Copy(l, ll, 32);
Array.Copy(l, 32, lr, 0, 32);
var ccChild = lr;
BigInteger parse256LL = new BigInteger(1, ll);
BigInteger N = ECKey.CURVE.N;
if(!ccChild.SequenceEqual(vchChainCode))
throw new InvalidOperationException("The derived chain code of the parent is not equal to this child chain code");
var keyBytes = PrivateKey.ToBytes();
var key = new BigInteger(1, keyBytes);
BigInteger kPar = key.Add(parse256LL.Negate()).Mod(N);
var keyParentBytes = kPar.ToByteArrayUnsigned();
if(keyParentBytes.Length < 32)
keyParentBytes = new byte[32 - keyParentBytes.Length].Concat(keyParentBytes).ToArray();
var parentExtKey = new ExtKey
{
vchChainCode = parent.vchChainCode,
nDepth = parent.Depth,
vchFingerprint = parent.Fingerprint,
nChild = parent.nChild,
key = new Key(keyParentBytes)
};
return parentExtKey;
}
public ExtKey Derive(uint index)
{
var result = new ExtKey
{
nDepth = (byte)(nDepth + 1),
vchFingerprint = CalculateChildFingerprint(),
nChild = index
};
result.key = key.Derivate(this.vchChainCode, index, out result.vchChainCode);
return result;
}
public bool IsParentOf(ExtKey childKey)
{
return childKey.IsChildOf(this);
}
public BitcoinExtKey Derive(uint index)
{
return(new BitcoinExtKey(ExtKey.Derive(index), Network));
}
/// <summary>
/// Gets the Base58 representation, in the same network, of the neutered extended key.
/// </summary>
public BitcoinExtPubKey Neuter()
{
return(ExtKey.Neuter().GetWif(Network));
}
public BitcoinExtKey(ExtKey key, Network network)
: base(key, network)
{
}
public PSBT SignAll(ExtKey extkey, KeyPath keyPath)
{
return(SignAll(extkey, keyPath, SigHash.All));
}
/// <summary>
/// Constructor. Creates a representation of an extended key, within the specified network.
/// </summary>
public BitcoinExtKey(ExtKey key, Network network)
: base(key.ToBytes(), network)
{
}
/// <summary>
/// Constructor. Creates a representation of an extended key, within the specified network.
/// </summary>
public BitcoinExtKey(ExtKey key, Network network)
: base(key, network)
{
}
public BitcoinExtKey CreateBitcoinExtKey(ExtKey key)
{
return(new BitcoinExtKey(key, this));
}
public bool IsChildOf(ExtKey parentKey)
{
if(Depth != parentKey.Depth + 1)
return false;
return parentKey.CalculateChildFingerprint().SequenceEqual(Fingerprint);
}
