public string CheckBase58Address(string address)
{
if (!Base58.IsValid(address))
{
return("The given address contains invalid base-58 characters.");
}
if (!Base58.IsValidWithChecksum(address))
{
return("The given address has an invalid checksum.");
}
byte[] addrBa = Base58.DecodeWithChecksum(address);
if (addrBa[0] != ConstantsFO.P2pkhAddrFirstByte && addrBa[0] != ConstantsFO.P2shAddrFirstByte)
{
return("The given address starts with an invalid byte.");
}
if (addrBa.Length != 21)
{
return("The given address byte length is invalid.");
}
return($"The given address is a valid base-58 encoded address used for " +
$"{(addrBa[0] == ConstantsFO.P2pkhAddrFirstByte ? "P2PKH" : "P2SH")} scripts.");
}
public string CheckPrivateKey(string key)
{
if (!Base58.IsValid(key))
{
return("The given key contains invalid base-58 characters.");
}
if (!Base58.IsValidWithChecksum(key))
{
return("The given key has an invalid checksum.");
}
byte[] keyBa = Base58.DecodeWithChecksum(key);
if (keyBa[0] != ConstantsFO.PrivKeyFirstByte)
{
return($"Invalid first key byte (actual={keyBa[0]}, expected={ConstantsFO.PrivKeyFirstByte}).");
}
if (keyBa.Length == 33)
{
if (!IsPrivateKeyInRange(keyBa.SubArray(1)))
{
return("Invalid key integer value (outside of the range defined by secp256k1 curve).");
}
return("The given key is a valid uncompressed private key.");
}
else if (keyBa.Length == 34)
{
if (keyBa[^ 1] != ConstantsFO.PrivKeyCompLastByte)
public bool CheckBase58Bip38(string bip38, out string message)
{
if (!Base58.IsValid(bip38))
{
message = "The given BIP-38 string contains invalid base-58 characters.";
return(false);
}
if (!Base58.IsValidWithChecksum(bip38))
{
message = "The given BIP-38 string has an invalid checksum.";
return(false);
}
byte[] data = Base58.DecodeWithChecksum(bip38);
if (data.Length != ConstantsFO.Bip38ByteLen)
{
message = "The given BIP-38 string has an invalid byte length.";
return(false);
}
if (data[0] != 1 || (data[1] != 0x42 && data[1] != 0x43))
{
message = "The given BIP-38 string has invalid starting bytes.";
return(false);
}
message = "The given BIP-38 string is valid.";
return(true);
}
[InlineData("1BvBMSOYstWetqTFn5Au4m4GFg7xJaNVN2", false)] // Invalid char
public void IsValidWithChecksumTest(string s, bool expected)
{
Assert.Equal(expected, Base58.IsValidWithChecksum(s));
}