/// <summary>
/// Calculate NetworkFee
/// </summary>
/// <returns></returns>
private long CalculateNetworkFee()
{
long networkFee = 0;
UInt160[] hashes = Tx.GetScriptHashesForVerifying(null);
int size = Transaction.HeaderSize + Tx.Attributes.GetVarSize() + Tx.Script.GetVarSize() + IO.Helper.GetVarSize(hashes.Length);
foreach (UInt160 hash in hashes)
{
byte[] witness_script = null;
// calculate NetworkFee
witness_script = signStore.FirstOrDefault(p => p.Contract.ScriptHash == hash)?.Contract?.Script;
if (witness_script is null || witness_script.Length == 0)
{
try
{
witness_script = rpcClient.GetContractState(hash.ToString())?.Script;
}
catch { }
}
if (witness_script is null)
{
continue;
}
networkFee += Wallet.CalculateNetworkFee(witness_script, ref size);
}
networkFee += size * policyAPI.GetFeePerByte();
return(networkFee);
}
/// <summary>
/// Estimate NetworkFee, assuming the witnesses are basic Signature Contract
/// </summary>
private long EstimateNetworkFee()
{
long networkFee = 0;
UInt160[] hashes = Tx.GetScriptHashesForVerifying(null);
int size = Transaction.HeaderSize + Tx.Attributes.GetVarSize() + Tx.Script.GetVarSize() + IO.Helper.GetVarSize(hashes.Length);
// assume the hashes are single Signature
foreach (var hash in hashes)
{
size += 166;
networkFee += ApplicationEngine.OpCodePrices[OpCode.PUSHBYTES64] + ApplicationEngine.OpCodePrices[OpCode.PUSHBYTES33] + InteropService.GetPrice(InteropService.Neo_Crypto_ECDsaVerify, null);
}
networkFee += size * policyAPI.GetFeePerByte();
return(networkFee);
}
/// <summary>
/// Calculate NetworkFee
/// </summary>
/// <param name="isEstimate">assuming the witnesses are basic Signature Contract if set to true</param>
/// <returns></returns>
private long CalculateNetworkFee(bool isEstimate = false)
{
long networkFee = 0;
UInt160[] hashes = Tx.GetScriptHashesForVerifying(null);
int size = Transaction.HeaderSize + Tx.Attributes.GetVarSize() + Tx.Cosigners.GetVarSize() + Tx.Script.GetVarSize() + IO.Helper.GetVarSize(hashes.Length);
foreach (UInt160 hash in hashes)
{
byte[] witness_script = null;
if (isEstimate)
{
// assuming the witnesses are basic Signature Contract
var dummyKey = new byte[32];
dummyKey[31] = 0x01;
KeyPair one = new KeyPair(dummyKey);
witness_script = Contract.CreateSignatureRedeemScript(one.PublicKey);
}
else
{
// calculate NetworkFee with context items
witness_script = context.GetScript(hash);
if (witness_script is null || witness_script.Length == 0)
{
try
{
witness_script = rpcClient.GetContractState(hash.ToString())?.Script;
}
catch { }
}
if (witness_script is null)
{
continue;
}
}
networkFee += Wallet.CalculateNetworkFee(witness_script, ref size);
}
networkFee += size * policyAPI.GetFeePerByte();
return(networkFee);
}