public InputValidationResult ValidateInput(int index)
{
if (index < 0 || index >= SpentOutputs.Length)
{
throw new ArgumentOutOfRangeException(nameof(index));
}
ScriptEvaluationContext ctx = new ScriptEvaluationContext()
{
ScriptVerify = ScriptVerify
};
if (Transaction is IHasForkId)
{
ctx.ScriptVerify |= NBitcoin.ScriptVerify.ForkId;
}
var scriptSig = Transaction.Inputs[index].ScriptSig;
var txout = this.SpentOutputs[index];
var ok = ctx.VerifyScript(scriptSig, txout.ScriptPubKey, new TransactionChecker(Transaction, index, txout, PrecomputedTransactionData));
if (!ok)
{
return(new InputValidationResult(index, ctx.Error, ctx.ExecutionData));
}
return(new InputValidationResult(index, ctx.ExecutionData));
}
public static bool VerifyScript(Script scriptSig, Script scriptPubKey, Transaction tx, int i, ScriptVerify scriptVerify = ScriptVerify.StrictEnc | ScriptVerify.P2SH, SigHash sigHash = SigHash.Undefined)
{
ScriptEvaluationContext eval = new ScriptEvaluationContext();
eval.SigHash = sigHash;
eval.ScriptVerify = scriptVerify;
return(eval.VerifyScript(scriptSig, scriptPubKey, tx, i));
}
public static bool VerifyScript(Script scriptSig, Script scriptPubKey, Transaction tx, int i, Money value, ScriptVerify scriptVerify, SigHash sigHash, out ScriptError error)
{
var eval = new ScriptEvaluationContext
{
SigHash = sigHash,
ScriptVerify = scriptVerify
};
var result = eval.VerifyScript(scriptSig, scriptPubKey, tx, i, value);
error = eval.Error;
return result;
}
public static bool VerifyScript(Script scriptSig, Transaction tx, int i, TxOut spentOutput, ScriptVerify scriptVerify, SigHash sigHash, out ScriptError error)
{
if (spentOutput == null)
{
throw new ArgumentNullException(nameof(spentOutput));
}
var eval = new ScriptEvaluationContext
{
SigHash = sigHash,
ScriptVerify = scriptVerify
};
var result = eval.VerifyScript(scriptSig, tx, i, spentOutput);
error = eval.Error;
return(result);
}
public bool SignedByMe(Transaction tx)
{
for (int i = 0; i < tx.Inputs.Count; i++)
{
var vin = tx.Inputs[i];
var key = GetKey(vin.ScriptSig.GetSourcePubKey());
if (key == null)
{
return(false);
}
var pubkeyScript = new PayToPubkeyHashTemplate().GenerateScriptPubKey(key.PubKey);
var eval = new ScriptEvaluationContext();
eval.SigHash = SigHash.All;
if (!eval.VerifyScript(vin.ScriptSig, pubkeyScript, tx, i))
{
return(false);
}
}
return(true);
}
private static bool VerifySignature(Transaction txFrom, Transaction txTo, int txToInN, ScriptVerify flagScriptVerify)
{
var input = txTo.Inputs[txToInN];
if (input.PrevOut.N >= txFrom.Outputs.Count)
{
return(false);
}
if (input.PrevOut.Hash != txFrom.GetHash())
{
return(false);
}
var output = txFrom.Outputs[input.PrevOut.N];
var txData = new PrecomputedTransactionData(txFrom);
var checker = new TransactionChecker(txTo, txToInN, output.Value, txData);
var ctx = new ScriptEvaluationContext {
ScriptVerify = flagScriptVerify
};
return(ctx.VerifyScript(input.ScriptSig, output.ScriptPubKey, checker));
}