/// <summary>
/// Create a multi-sig account from a list of public keys.
///
/// </summary>
/// <param name="signingThreshold">Minimum number of signatures required for verification. Must be larger than 0 and less than number of keys provided.</param>
/// <param name="pubKeys">List of public keys to form the account. 2-16 keys allowed. Order is important.</param>
/// <param name="label"></param>
public Account CreateMultiSigAccount(int signingThreshold, string[] pubKeys, string label)
{
if (signingThreshold >= pubKeys.Length)
{
throw new ArgumentOutOfRangeException($"{nameof(signingThreshold)} must be larger than 0 and less than number of keys provided");
}
var publicKeys = new List <NeoECPoint>();
foreach (var pubKey in pubKeys)
{
publicKeys.Add(NeoECPoint.Parse(pubKey, ECCurve.Secp256r1));
}
var verificationScript = Helper.CreateMultiSigRedeemScript(signingThreshold, publicKeys.ToArray());
var contract = new Contract
{
Script = verificationScript,
Parameters = Enumerable.Repeat(new Parameter("signature", ParameterType.Signature), signingThreshold).ToList(),
Deployed = false
};
var account = new Account(verificationScript.ToScriptHash(), label, false, false, null, contract, null);
AddAccount(account);
return(account);
}
/// <summary>
/// Creates an Account, ecrypts it using NEP2 and returns it.
/// </summary>
/// <returns></returns>
public async Task <Account> CreateAccount(string label, string password)
{
var privateKey = new byte[32];
using (var rng = RandomNumberGenerator.Create())
{
rng.GetBytes(privateKey);
}
var key = new KeyPair(privateKey);
Array.Clear(privateKey, 0, privateKey.Length);
var contract = new Contract
{
Script = Helper.CreateSignatureRedeemScript(key.PublicKey),
Parameters = new List <Parameter>
{
new Parameter("signature", ParameterType.Signature)
},
Deployed = false
};
var encryptedKey = await Nep2.Encrypt(key.Export(), password);
var account = new Account(contract.ScriptHash, key)
{
Nep2Key = encryptedKey,
Contract = contract,
Label = label
};
AddAccount(account);
return(account);
}
/// <summary>
/// Creates an Account and returns it.
/// </summary>
/// <returns></returns>
public Account CreateAccount(string label)
{
var privateKey = new byte[32];
using (var rng = RandomNumberGenerator.Create())
{
rng.GetBytes(privateKey);
}
var key = new KeyPair(privateKey);
Array.Clear(privateKey, 0, privateKey.Length);
var contract = new Contract
{
Script = Helper.CreateSignatureRedeemScript(key.PublicKey),
Parameters = new List <Parameter>
{
new Parameter("signature", ParameterType.Signature)
},
Deployed = false
};
var account = new Account(contract.ScriptHash, key)
{
Contract = contract,
Label = label
};
AddAccount(account);
return(account);
}
/// <summary>
/// Decrypts and add the account to the Wallet Account List, using NEP2.
/// </summary>
/// <param name="label"></param>
/// <param name="encryptedPrivateKey"></param>
/// <param name="password"></param>
/// <returns></returns>
public async Task <Account> ImportAccount(string encryptedPrivateKey, string password, string label)
{
var privateKey = await Nep2.Decrypt(encryptedPrivateKey, password, _wallet.Scrypt);
var key = new KeyPair(privateKey);
Array.Clear(privateKey, 0, privateKey.Length);
var contract = new Contract
{
Script = Helper.CreateSignatureRedeemScript(key.PublicKey),
Parameters = new List <Parameter>
{
new Parameter("signature", ParameterType.Signature)
},
Deployed = false
};
var account = new Account(contract.ScriptHash, key)
{
Nep2Key = encryptedPrivateKey,
Label = label,
Contract = contract,
IsDefault = false
};
AddAccount(account);
return(account);
}
/// <summary>
/// Decrypts and add the account to the Wallet Account List, using WIF.
/// </summary>
/// <param name="privateKey"></param>
/// <param name="label"></param>
/// <returns></returns>
public Account ImportAccount(byte[] privateKey, string label)
{
var key = new KeyPair(privateKey);
var contract = new Contract
{
Script = Helper.CreateSignatureRedeemScript(key.PublicKey),
Parameters = new List <Parameter>
{
new Parameter("signature", ParameterType.Signature)
},
Deployed = false
};
var account = new Account(contract.ScriptHash, key)
{
Contract = contract,
Label = label
};
AddAccount(account);
return(account);
}
public static byte[] Sign(KeyPair key, Transaction tx, bool signed = true)
{
var txData = tx.SerializeTransaction();
var signature = Sign(txData, key.PrivateKey);
if (signed)
{
var invocationScript = ("40" + signature.ToHexString()).HexToBytes();
var verificationScript = Helper.CreateSignatureRedeemScript(key.PublicKey);
tx.Witnesses = new[]
{
new Witness
{
InvocationScript = invocationScript,
VerificationScript = verificationScript
}
};
return(tx.ToArray());
}
return(signature);
}