internal static bool VerifySignature(this ISignable signable)
{
UInt160[] hashes;
try
{
hashes = signable.GetScriptHashesForVerifying();
}
catch (InvalidOperationException)
{
return false;
}
if (hashes.Length != signable.Scripts.Length) return false;
for (int i = 0; i < hashes.Length; i++)
{
if (hashes[i] != signable.Scripts[i].RedeemScript.ToScriptHash()) return false;
ScriptEngine engine = new ScriptEngine(signable.Scripts[i], signable.GetHashForSigning());
if (!engine.Execute()) return false;
}
return true;
}
private bool ChainGetBlock(ScriptEngine engine)
{
if (engine.Stack.Count < 1)
{
return(false);
}
StackItem x = engine.Stack.Pop();
byte[][] data = x.GetBytesArray();
List <Block> r = new List <Block>();
foreach (byte[] d in data)
{
switch (d.Length)
{
case sizeof(uint):
uint height = BitConverter.ToUInt32(d, 0);
if (Blockchain.Default != null)
{
r.Add(Blockchain.Default.GetBlock(height));
}
else if (height == 0)
{
r.Add(Blockchain.GenesisBlock);
}
else
{
r.Add(null);
}
break;
case 32:
UInt256 hash = new UInt256(d);
if (Blockchain.Default != null)
{
r.Add(Blockchain.Default.GetBlock(hash));
}
else if (hash == Blockchain.GenesisBlock.Hash)
{
r.Add(Blockchain.GenesisBlock);
}
else
{
r.Add(null);
}
break;
default:
return(false);
}
}
if (x.IsArray)
{
engine.Stack.Push(new StackItem(r.ToArray()));
}
else
{
engine.Stack.Push(new StackItem(r[0]));
}
return(true);
}
private bool SystemCurrentScriptHash(ScriptEngine engine)
{
engine.Stack.Push(new StackItem(engine.ExecutingScript.ToScriptHash()));
return(true);
}
private bool SystemCurrentTx(ScriptEngine engine)
{
engine.Stack.Push(new StackItem(engine.Signable as Transaction));
return(true);
}
private bool SystemNow(ScriptEngine engine)
{
engine.Stack.Push(DateTime.Now.ToTimestamp());
return(true);
}
public bool Invoke(string method, ScriptEngine engine)
{
switch (method)
{
case "System.now":
return(SystemNow(engine));
case "System.currentTx":
return(SystemCurrentTx(engine));
case "System.currentScriptHash":
return(SystemCurrentScriptHash(engine));
case "Chain.height":
return(ChainHeight(engine));
case "Chain.getHeader":
return(ChainGetHeader(engine));
case "Chain.getBlock":
return(ChainGetBlock(engine));
case "Chain.getTx":
return(ChainGetTx(engine));
case "Header.hash":
return(HeaderHash(engine));
case "Header.version":
return(HeaderVersion(engine));
case "Header.prevHash":
return(HeaderPrevHash(engine));
case "Header.merkleRoot":
return(HeaderMerkleRoot(engine));
case "Header.timestamp":
return(HeaderTimestamp(engine));
case "Header.nonce":
return(HeaderNonce(engine));
case "Header.nextMiner":
return(HeaderNextMiner(engine));
case "Block.txCount":
return(BlockTxCount(engine));
case "Block.tx":
return(BlockTx(engine));
case "Block.getTx":
return(BlockGetTx(engine));
case "TX.hash":
return(TxHash(engine));
case "TX.type":
return(TxType(engine));
case "Asset.type":
return(AssetType(engine));
case "Asset.amount":
return(AssetAmount(engine));
case "Asset.issuer":
return(AssetIssuer(engine));
case "Asset.admin":
return(AssetAdmin(engine));
case "Enroll.pubkey":
return(EnrollPubkey(engine));
case "Vote.enrollments":
return(VoteEnrollments(engine));
case "TX.attributes":
return(TxAttributes(engine));
case "TX.inputs":
return(TxInputs(engine));
case "TX.outputs":
return(TxOutputs(engine));
case "Attribute.usage":
return(AttrUsage(engine));
case "Attribute.data":
return(AttrData(engine));
case "Input.hash":
return(TxInHash(engine));
case "Input.index":
return(TxInIndex(engine));
case "Output.asset":
return(TxOutAsset(engine));
case "Output.value":
return(TxOutValue(engine));
case "Output.scriptHash":
return(TxOutScriptHash(engine));
default:
return(false);
}
}
