/// <summary>
/// Get token balance with string parameters
/// </summary>
/// <param name="tokenHash">token script hash, Example: "0x43cf98eddbe047e198a3e5d57006311442a0ca15"(NEO)</param>
/// <param name="account">address, scripthash or public key string
/// Example: address ("AV556nYUwyJKNv8Xy7hVMLQnkmKPukw6x5"), scripthash ("0x6a38cd693b615aea24dd00de12a9f5836844da91"), public key ("02f9ec1fd0a98796cf75b586772a4ddd41a0af07a1dbdf86a7238f74fb72503575")</param>
/// <returns></returns>
public BigInteger GetTokenBalance(string tokenHash, string account)
{
UInt160 scriptHash = Utility.GetScriptHash(tokenHash);
UInt160 accountHash = Utility.GetScriptHash(account);
return(nep5API.BalanceOf(scriptHash, accountHash));
}
/// <summary>
/// Verify Witness count and add witnesses
/// </summary>
public TransactionManager Sign()
{
// Calculate NetworkFee
Tx.NetworkFee = CalculateNetworkFee();
var gasBalance = nep5API.BalanceOf(NativeContract.GAS.Hash, sender);
if (gasBalance < Tx.SystemFee + Tx.NetworkFee)
{
throw new InvalidOperationException($"Insufficient GAS in address: {sender.ToAddress()}");
}
// Sign with signStore
foreach (var item in signStore)
{
foreach (var key in item.KeyPairs)
{
byte[] signature = Tx.Sign(key);
if (!context.AddSignature(item.Contract, key.PublicKey, signature))
{
throw new Exception("AddSignature failed!");
}
}
}
// Verify witness count
if (!context.Completed)
{
throw new Exception($"Please add signature or witness first!");
}
Tx.Witnesses = context.GetWitnesses();
return(this);
}
/// <summary>
/// Create an unsigned Transaction object with given parameters.
/// </summary>
/// <param name="script">Transaction Script</param>
/// <param name="attributes">Transaction Attributes</param>
/// <param name="cosigners">Transaction Cosigners</param>
/// <param name="networkFee">Transaction NetworkFee, will set to estimate value(with only basic signatures) when networkFee is 0</param>
/// <returns></returns>
public TransactionManager MakeTransaction(byte[] script, TransactionAttribute[] attributes = null, Cosigner[] cosigners = null, long networkFee = 0)
{
var random = new Random();
uint height = rpcClient.GetBlockCount() - 1;
Tx = new Transaction
{
Version = 0,
Nonce = (uint)random.Next(),
Script = script,
Sender = sender,
ValidUntilBlock = height + Transaction.MaxValidUntilBlockIncrement,
Attributes = attributes ?? new TransactionAttribute[0],
Cosigners = cosigners ?? new Cosigner[0],
Witnesses = new Witness[0]
};
// Add witness hashes parameter to pass CheckWitness
UInt160[] hashes = Tx.GetScriptHashesForVerifying(null);
RpcInvokeResult result = rpcClient.InvokeScript(script, hashes);
Tx.SystemFee = Math.Max(long.Parse(result.GasConsumed) - ApplicationEngine.GasFree, 0);
if (Tx.SystemFee > 0)
{
long d = (long)NativeContract.GAS.Factor;
long remainder = Tx.SystemFee % d;
if (remainder > 0)
{
Tx.SystemFee += d - remainder;
}
else if (remainder < 0)
{
Tx.SystemFee -= remainder;
}
}
context = new ContractParametersContext(Tx);
// set networkfee to estimate value when networkFee is 0
Tx.NetworkFee = networkFee == 0 ? EstimateNetworkFee() : networkFee;
var gasBalance = nep5API.BalanceOf(NativeContract.GAS.Hash, sender);
if (gasBalance >= Tx.SystemFee + Tx.NetworkFee)
{
return(this);
}
throw new InvalidOperationException($"Insufficient GAS in address: {sender.ToAddress()}");
}