public static long CheckWeight(Permission permission, List <ByteString> signature, byte[] hash, List <ByteString> approve_list)
{
long result = 0;
if (signature.Count > permission.Keys.Count)
{
throw new PermissionException(
"Signature count is" + signature.Count +
"more than key counts of permission" + permission.Keys.Count);
}
Dictionary <ByteString, long> signature_weight = new Dictionary <ByteString, long>();
foreach (ByteString sign in signature)
{
if (sign.Length < 65)
{
throw new SignatureFormatException("Signature size is" + sign.Length);
}
ECKey ec_key = ECKey.RecoverFromSignature(ECDSASignature.ExtractECDSASignature(sign.ToByteArray()),
hash,
false);
byte[] publickey = ec_key.PublicKey;
byte[] address = Wallet.PublickKeyToAddress(ec_key.PublicKey);
long weight = GetWeight(permission, address);
if (weight == 0)
{
throw new PermissionException(
sign.ToByteArray().ToHexString()
+ "is signed by"
+ Wallet.AddressToBase58(address)
+ "but it is not contained of permission.");
}
if (signature_weight.ContainsKey(sign))
{
throw new PermissionException(Wallet.AddressToBase58(address) + " has signed twice");
}
signature_weight.Add(sign, weight);
if (approve_list != null)
{
approve_list.Add(ByteString.CopyFrom(publickey));
}
result += weight;
}
return(result);
}
public bool ValidateSignature(DatabaseManager db_manager)
{
try
{
ECDSASignature signature = ECDSASignature.ExtractECDSASignature(this.block.BlockHeader.WitnessSignature.ToByteArray());
byte[] signature_address = ECKey.SignatureToAddress(GetRawHash().Hash, signature);
byte[] witness_address = this.block.BlockHeader.RawData.WitnessAddress.ToByteArray();
if (db_manager.DynamicProperties.GetAllowMultiSign() != 1)
{
return(signature_address.SequenceEqual(witness_address));
}
else
{
byte[] witness_permission_address = db_manager.Account.Get(witness_address)?.GetWitnessPermissionAddress();
return(signature_address.SequenceEqual(witness_permission_address));
}
}
catch (System.Exception e)
{
throw new ValidateSignatureException(e.Message);
}
}
public static TransactionApprovedList GetTransactionApprovedList(Transaction transaction)
{
TransactionExtention transaction_extention = new TransactionExtention()
{
Transaction = transaction,
Txid = ByteString.CopyFrom(SHA256Hash.ToHash(transaction.RawData.ToByteArray())),
Result = new Return()
{
Result = true,
Code = Return.Types.response_code.Success
}
};
TransactionApprovedList approved = new TransactionApprovedList()
{
Transaction = transaction_extention
};
try
{
Contract contract = transaction.RawData.Contract[0];
byte[] owner_address = TransactionCapsule.GetOwner(contract);
AccountCapsule account = Manager.Instance.DBManager.Account.Get(owner_address);
if (account == null)
{
throw new PermissionException("Account is not exist.");
}
if (transaction.Signature.Count > 0)
{
byte[] hash = SHA256Hash.ToHash(transaction.RawData.ToByteArray());
foreach (var signature in transaction.Signature)
{
if (signature.Count() < 65)
{
throw new SignatureFormatException("Signature size is " + signature.Count());
}
byte[] signature_address = ECKey.SignatureToAddress(hash, ECDSASignature.ExtractECDSASignature(signature.ToByteArray()));
approved.ApprovedList.Add(ByteString.CopyFrom(signature_address));
}
}
approved.Result = new TransactionApprovedList.Types.Result()
{
Code = TransactionApprovedList.Types.Result.Types.response_code.Success
};
}
catch (SignatureFormatException e)
{
approved.Result = new TransactionApprovedList.Types.Result()
{
Code = TransactionApprovedList.Types.Result.Types.response_code.SignatureFormatError,
Message = e.Message
};
}
catch (SignatureException e)
{
approved.Result = new TransactionApprovedList.Types.Result()
{
Code = TransactionApprovedList.Types.Result.Types.response_code.ComputeAddressError,
Message = e.Message
};
}
catch (System.Exception e)
{
approved.Result = new TransactionApprovedList.Types.Result()
{
Code = TransactionApprovedList.Types.Result.Types.response_code.OtherError,
Message = e.Message
};
}
return(approved);
}