private ContractTask Update(ApplicationEngine engine, byte[] nefFile, byte[] manifest, StackItem data)
{
if (nefFile is null && manifest is null) throw new ArgumentException();
engine.AddValt(engine.StoragePrice * ((nefFile?.Length ?? 0) + (manifest?.Length ?? 0)));
var contract = engine.Snapshot.GetAndChange(CreateStorageKey(Prefix_Contract).Add(engine.CallingScriptHash))?.GetInteroperable<ContractState>();
if (contract is null) throw new InvalidOperationException($"Updating Contract Does Not Exist: {engine.CallingScriptHash}");
if (nefFile != null)
{
if (nefFile.Length == 0)
throw new ArgumentException($"Invalid NefFile Length: {nefFile.Length}");
// Update nef
contract.Nef = nefFile.AsSerializable<NefFile>();
}
if (manifest != null)
{
if (manifest.Length == 0)
throw new ArgumentException($"Invalid Manifest Length: {manifest.Length}");
ContractManifest manifest_new = ContractManifest.Parse(manifest);
if (manifest_new.Name != contract.Manifest.Name)
throw new InvalidOperationException("The name of the contract can't be changed.");
if (!manifest_new.IsValid(contract.Hash))
throw new InvalidOperationException($"Invalid Manifest Hash: {contract.Hash}");
contract.Manifest = manifest_new;
}
Helper.Check(contract.Nef.Script, contract.Manifest.Abi);
contract.UpdateCounter++; // Increase update counter
return OnDeploy(engine, contract, data, true);
}
private bool RegisterCandidate(ApplicationEngine engine, ECPoint pubkey)
{
if (!engine.CheckWitnessInternal(Contract.CreateSignatureRedeemScript(pubkey).ToScriptHash()))
{
return(false);
}
engine.AddValt(GetRegisterPrice(engine.Snapshot));
StorageKey key = CreateStorageKey(Prefix_Candidate).Add(pubkey);
StorageItem item = engine.Snapshot.GetAndChange(key, () => new StorageItem(new CandidateState()));
CandidateState state = item.GetInteroperable <CandidateState>();
state.Registered = true;
return(true);
}
private async ContractTask<ContractState> Deploy(ApplicationEngine engine, byte[] nefFile, byte[] manifest, StackItem data)
{
if (engine.ScriptContainer is not Transaction tx)
throw new InvalidOperationException();
if (nefFile.Length == 0)
throw new ArgumentException($"Invalid NefFile Length: {nefFile.Length}");
if (manifest.Length == 0)
throw new ArgumentException($"Invalid Manifest Length: {manifest.Length}");
engine.AddValt(Math.Max(
engine.StoragePrice * (nefFile.Length + manifest.Length),
GetMinimumDeploymentFee(engine.Snapshot)
));
NefFile nef = nefFile.AsSerializable<NefFile>();
ContractManifest parsedManifest = ContractManifest.Parse(manifest);
Helper.Check(nef.Script, parsedManifest.Abi);
UInt160 hash = Helper.GetContractHash(tx.Sender, nef.CheckSum, parsedManifest.Name);
StorageKey key = CreateStorageKey(Prefix_Contract).Add(hash);
if (engine.Snapshot.Contains(key))
throw new InvalidOperationException($"Contract Already Exists: {hash}");
ContractState contract = new()
{
Id = GetNextAvailableId(engine.Snapshot),
UpdateCounter = 0,
Nef = nef,
Hash = hash,
Manifest = parsedManifest
};
if (!contract.Manifest.IsValid(hash)) throw new InvalidOperationException($"Invalid Manifest Hash: {hash}");
engine.Snapshot.Add(key, new StorageItem(contract));
await OnDeploy(engine, contract, data, false);
return contract;
}