public static string CalculateContractAddress(string address, BigInteger nonce)
{
var sha3 = new Sha3Keccack();
return
(sha3.CalculateHash(RLP.RLP.EncodeList(RLP.RLP.EncodeElement(address.HexToByteArray()),
RLP.RLP.EncodeElement(nonce.ToBytesForRLPEncoding()))).ToHex().Substring(24));
}
public string ConvertToChecksumAddress(string address)
{
address = address.ToLower().RemoveHexPrefix();
var addressHash = new Sha3Keccack().CalculateHash(address);
var checksumAddress = "0x";
for (var i = 0; i < address.Length; i++)
{
if (int.Parse(addressHash[i].ToString(), NumberStyles.HexNumber) > 7)
{
checksumAddress += address[i].ToString().ToUpper();
}
else
{
checksumAddress += address[i];
}
}
return(checksumAddress);
}
public bool IsChecksumAddress(string address)
{
if (string.IsNullOrEmpty(address))
{
return(false);
}
address = address.RemoveHexPrefix();
var addressHash = new Sha3Keccack().CalculateHash(address.ToLower());
for (var i = 0; i < 40; i++)
{
var value = int.Parse(addressHash[i].ToString(), NumberStyles.HexNumber);
// the nth letter should be uppercase if the nth digit of casemap is 1
if (value > 7 && address[i].ToString().ToUpper() != address[i].ToString() ||
value <= 7 && address[i].ToString().ToLower() != address[i].ToString())
{
return(false);
}
}
return(true);
}
public static string CalculateTransactionHash(string rawSignedTransaction)
{
var sha3 = new Sha3Keccack();
return(sha3.CalculateHashFromHex(rawSignedTransaction));
}