/// <summary>
/// Removes the checksum from the specified address with checksum
/// </summary>
/// <param name="address">The address with checksum or without checksum.</param>
/// <returns>the specified address without checksum</returns>
public static string RemoveChecksum(this string address)
{
if (InputValidator.IsAddress(address))
{
return(RemoveChecksumFromAddress(address));
}
if (InputValidator.IsAddressWithoutChecksum(address))
{
return(address);
}
throw new ArgumentException(Constants.INVALID_ADDRESSES_INPUT_ERROR);
}
/// <summary>
///
/// </summary>
/// <param name="seed"></param>
/// <param name="security"></param>
/// <param name="index"></param>
/// <param name="checksum"></param>
/// <param name="curl"></param>
/// <returns></returns>
public static string NewAddress(string seed, int security, int index, bool checksum, ICurl curl)
{
if (!InputValidator.IsValidSecurityLevel(security))
{
throw new ArgumentException(Constants.INVALID_SECURITY_LEVEL_INPUT_ERROR);
}
Signing signing = new Signing(curl);
sbyte[] key = signing.Key(Converter.ToTrits(seed), index, security);
sbyte[] digests = signing.Digests(key);
sbyte[] addressTrits = signing.Address(digests);
string address = Converter.ToTrytes(addressTrits);
if (checksum)
{
address = address.AddChecksum();
}
return(address);
}
/// <summary>
/// </summary>
/// <param name="bundleToSign"></param>
/// <param name="inputAddress"></param>
/// <param name="keyTrytes"></param>
/// <returns></returns>
public Bundle AddSignature(Bundle bundleToSign, string inputAddress, string keyTrytes)
{
// Get the security used for the private key
// 1 security level = 2187 trytes
var security = keyTrytes.Length / Constants.MESSAGE_LENGTH;
// convert private key trytes into trits
var key = Converter.ToTrits(keyTrytes);
// First get the total number of already signed transactions
// use that for the bundle hash calculation as well as knowing
// where to add the signature
var numSignedTxs = 0;
for (var i = 0; i < bundleToSign.Transactions.Count; i++)
{
if (bundleToSign.Transactions[i].Address.Equals(inputAddress, StringComparison.Ordinal))
{
if (!InputValidator.IsNinesTrytes(bundleToSign.Transactions[i].SignatureMessageFragment,
bundleToSign.Transactions[i].SignatureMessageFragment.Length))
{
numSignedTxs++;
}
// Else sign the transactions
else
{
var bundleHash = bundleToSign.Transactions[i].Bundle;
// First 6561 trits for the firstFragment
var firstFragment = new sbyte[6561];
Array.Copy(key, firstFragment, 6561);
// Get the normalized bundle hash
var normalizedBundleFragments = new sbyte[3][];
for (var n = 0; n < 3; n++)
{
normalizedBundleFragments[n] = new sbyte[27];
}
var normalizedBundleHash = bundleToSign.NormalizedBundle(bundleHash);
// Split hash into 3 fragments
for (var k = 0; k < 3; k++)
{
Array.Copy(normalizedBundleHash, k * 27, normalizedBundleFragments[k], 0, 27);
}
// First bundle fragment uses 27 trytes
var firstBundleFragment = normalizedBundleFragments[numSignedTxs % 3];
// Calculate the new signatureFragment with the first bundle fragment
var firstSignedFragment = _signing.SignatureFragment(firstBundleFragment, firstFragment);
// Convert signature to trytes and assign the new signatureFragment
bundleToSign.Transactions[i].SignatureMessageFragment = Converter.ToTrytes(firstSignedFragment);
for (var j = 1; j < security; j++)
{
// Next 6561 trits for the firstFragment
var nextFragment = new sbyte[6561];
Array.Copy(key, 6561 * j, nextFragment, 0, 6561);
// Use the next 27 trytes
var nextBundleFragment = normalizedBundleFragments[(numSignedTxs + j) % 3];
// Calculate the new signatureFragment with the first bundle fragment
var nextSignedFragment = _signing.SignatureFragment(nextBundleFragment, nextFragment);
// Convert signature to trytes and add new bundle entry at i + j position
// Assign the signature fragment
bundleToSign.Transactions[i + j].SignatureMessageFragment =
Converter.ToTrytes(nextSignedFragment);
}
break;
}
}
}
return(bundleToSign);
}
