public Transaction CallContract(NeoKeys key, UInt160 scriptHash, object[] args, string attachSymbol = null
, IEnumerable <Transaction.Output> attachTargets = null, byte[] nonce = null, Action <string> usedRpc = null)
{
var bytes = GenerateScript(scriptHash, args, nonce);
return(CallContract(key, scriptHash, bytes, attachSymbol, attachTargets, usedRpc));
}
public Transaction Transfer(NeoKeys from_key, byte[] to_address_hash, decimal value)
{
BigInteger amount = ConvertToBigInt(value);
var sender_address_hash = from_key.Address.GetScriptHashFromAddress();
var response = api.CallContract(from_key, ScriptHash, "transfer", new object[] { sender_address_hash, to_address_hash, amount });
return(response);
}
public void WaitForTransaction(BlockIterator iterator, NeoKeys keys, Transaction tx, int maxBlocksToWait = 9999)
{
if (tx == null)
{
throw new ArgumentNullException();
}
WaitForTransaction(iterator, x => x.Hash == tx.Hash, maxBlocksToWait);
lastTransactions[keys.Address] = tx;
}
public static Transaction MintTokens(NEP5 token, NeoKeys buyer_key, string symbol, decimal amount)
{
var attachs = new List <Transaction.Output>();
attachs.Add(new Transaction.Output()
{
assetID = NeoAPI.GetAssetID(symbol), scriptHash = token.ScriptHash, value = amount
});
var response = token.api.CallContract(buyer_key, token.ScriptHash, "mintTokens", new object[] { }, symbol, attachs);
return(response);
}
public Transaction ClaimGas(NeoKeys ownerKey)
{
var targetScriptHash = new UInt160(ownerKey.Address.AddressToScriptHash());
decimal amount;
var claimable = GetClaimable(targetScriptHash, out amount);
var references = new List <Transaction.Input>();
foreach (var entry in claimable)
{
references.Add(new Transaction.Input()
{
prevHash = entry.hash, prevIndex = entry.index
});
}
if (amount <= 0)
{
throw new ArgumentException("No GAS to claim at this address");
}
List <Transaction.Input> inputs;
List <Transaction.Output> outputs;
GenerateInputsOutputs(ownerKey, "GAS", null, out inputs, out outputs);
outputs.Add(
new Transaction.Output()
{
scriptHash = targetScriptHash,
assetID = NeoAPI.GetAssetID("GAS"),
value = amount
});
Transaction tx = new Transaction()
{
type = TransactionType.ClaimTransaction,
version = 0,
script = null,
gas = -1,
claimReferences = references.ToArray(),
inputs = inputs.ToArray(),
outputs = outputs.ToArray(),
};
tx.Sign(ownerKey);
var ok = SendTransaction(tx);
return(ok ? tx : null);
}
public IEnumerator ClaimGas(UnspentEntries unspent, NeoKeys ownerKey, List <UnspentEntry> claimable, decimal amount, Action <Transaction, string> callback)
{
var targetScriptHash = new UInt160(ownerKey.Address.AddressToScriptHash());
var references = new List <Transaction.Input>();
foreach (var entry in claimable)
{
references.Add(new Transaction.Input()
{
prevHash = entry.hash, prevIndex = entry.index
});
}
if (amount <= 0)
{
throw new ArgumentException("No GAS to claim at this address");
}
List <Transaction.Input> inputs;
List <Transaction.Output> outputs;
GenerateInputsOutputs(unspent, ownerKey, "GAS", null, out inputs, out outputs);
outputs.Add(
new Transaction.Output()
{
scriptHash = targetScriptHash,
assetID = NeoAPI.GetAssetID("GAS"),
value = amount
});
Transaction tx = new Transaction()
{
type = TransactionType.ClaimTransaction,
version = 0,
script = null,
gas = -1,
claimReferences = references.ToArray(),
inputs = inputs.ToArray(),
outputs = outputs.ToArray(),
};
tx.Sign(ownerKey);
return(SendTransaction(tx, (error) =>
{
callback(string.IsNullOrEmpty(error) ? tx : null, error);
}));
}
public Transaction WithdrawAsset(NeoKeys toKey, UInt160 fromScripthash, string symbol, IEnumerable <Transaction.Output> targets, byte[] verificationScript)
{
var check = verificationScript.ToScriptHash();
if (check != fromScripthash)
{
throw new ArgumentException("Invalid verification script");
}
List <Transaction.Input> inputs;
List <Transaction.Output> outputs;
GenerateInputsOutputs(fromScripthash, symbol, targets, out inputs, out outputs);
List <Transaction.Input> gas_inputs;
List <Transaction.Output> gas_outputs;
GenerateInputsOutputs(toKey, "GAS", null, out gas_inputs, out gas_outputs);
foreach (var entry in gas_inputs)
{
inputs.Add(entry);
}
foreach (var entry in gas_outputs)
{
outputs.Add(entry);
}
Transaction tx = new Transaction()
{
type = TransactionType.ContractTransaction,
version = 0,
script = null,
gas = -1,
inputs = inputs.ToArray(),
outputs = outputs.ToArray()
};
var witness = new Witness {
invocationScript = ("0014" + toKey.Address.AddressToScriptHash().ByteToHex()).HexToBytes(), verificationScript = verificationScript
};
tx.Sign(toKey, new Witness[] { witness });
var ok = SendTransaction(tx);
return(ok ? tx : null);
}
public Transaction WithdrawAsset(NeoKeys toKey, string fromAddress, string symbol, decimal amount, byte[] verificationScript)
{
var fromScriptHash = new UInt160(fromAddress.GetScriptHashFromAddress());
var target = new Transaction.Output()
{
scriptHash = new UInt160(toKey.Address.GetScriptHashFromAddress()), value = amount
};
var targets = new List <Transaction.Output>()
{
target
};
return(WithdrawAsset(toKey, fromScriptHash, symbol, targets, verificationScript));
}
// transfer to multiple addresses
public Transaction Transfer(NeoKeys from_key, Dictionary <byte[], decimal> transfers)
{
if (transfers.Count > max_transfer_count)
{
throw new ArgumentException("Max transfers per call = " + max_transfer_count);
}
var scripts = new List <byte[]>();
var sender_address_hash = from_key.Address.GetScriptHashFromAddress();
int index = 0;
foreach (var entry in transfers)
{
if (entry.Value <= 0)
{
var addr = new UInt160(entry.Key).ToAddress();
throw new ArgumentException($"Invalid amount {entry.Value} for address {addr}");
}
BigInteger amount = ConvertToBigInt(entry.Value);
var isLast = index == transfers.Count - 1;
var args = new object[] { sender_address_hash, entry.Key, amount };
var bytes = NeoAPI.GenerateScript(ScriptHash, new object[] { "transfer", args }, isLast);
scripts.Add(bytes);
index++;
}
var final_size = scripts.Sum(x => x.Length);
byte[] final_script = new byte[final_size];
using (var stream = new MemoryStream(final_script))
{
foreach (byte[] bytes in scripts)
{
stream.Write(bytes, 0, bytes.Length);
}
}
var response = api.CallContract(from_key, ScriptHash, final_script);
return(response);
}
// transfer to multiple addresses
public Transaction Transfer(NeoKeys from_key, Dictionary <string, decimal> transfers)
{
var temp = new Dictionary <byte[], decimal>(new ByteArrayComparer());
foreach (var entry in transfers)
{
if (!entry.Key.IsValidAddress())
{
throw new ArgumentException($"{entry.Key} is not a valid address");
}
var hash = entry.Key.AddressToScriptHash();
temp[hash] = entry.Value;
}
return(Transfer(from_key, temp));
}
public Transaction CallContract(NeoKeys key, UInt160 scriptHash, byte[] bytes, string attachSymbol = null
, IEnumerable <Transaction.Output> attachTargets = null, Action <string> usedRpc = null)
{
List <Transaction.Input> inputs = null;
List <Transaction.Output> outputs = null;
if (attachSymbol == null)
{
attachSymbol = "GAS";
}
if (!string.IsNullOrEmpty(attachSymbol))
{
GenerateInputsOutputs(key, attachSymbol, attachTargets, out inputs, out outputs);
if (inputs.Count == 0)
{
throw new NeoException($"Not enough inputs for transaction");
}
}
var transaction = new Transaction()
{
type = TransactionType.InvocationTransaction,
version = 0,
script = bytes,
gas = 0,
inputs = inputs != null?inputs.ToArray() : null,
outputs = outputs != null?outputs.ToArray() : null,
attributes = inputs == null ? (new TransactionAttribute[] { new TransactionAttribute(TransactionAttributeUsage.Script, key.Address.AddressToScriptHash()) }) : null
};
transaction.Sign(key);
if (SendTransaction(key, transaction, out string rpc))
{
if (usedRpc != null)
{
usedRpc.Invoke(rpc);
}
return(transaction);
}
return(null);
}
public Transaction SendAsset(NeoKeys fromKey, string toAddress, string symbol, decimal amount)
{
if (String.Equals(fromKey.Address, toAddress, StringComparison.OrdinalIgnoreCase))
{
throw new NeoException("Source and dest addresses are the same");
}
var toScriptHash = toAddress.GetScriptHashFromAddress();
var target = new Transaction.Output()
{
scriptHash = new UInt160(toScriptHash), value = amount
};
var targets = new List <Transaction.Output>()
{
target
};
return(SendAsset(fromKey, symbol, targets));
}
public void GenerateInputsOutputs(UnspentEntries unspent, NeoKeys key, string symbol, IEnumerable <Transaction.Output> targets, out List <Transaction.Input> inputs, out List <Transaction.Output> outputs, decimal system_fee = 0, bool allowSameSourceAndDest = false)
{
var from_script_hash = new UInt160(key.signatureHash.ToArray());
var info = GetAssetsInfo();
var targetAssetID = NeoUtils.ReverseHex(info[symbol]).HexToBytes();
if (targets != null)
{
foreach (var t in targets)
{
if (t.assetID == null)
{
t.assetID = targetAssetID;
}
}
}
//else Console.WriteLine("ASSETID target already existed: " + symbol);
GenerateInputsOutputs(unspent, from_script_hash, targets, out inputs, out outputs, system_fee, allowSameSourceAndDest);
}
public static NeoKeys FromNEP2(string nep2, string passphrase, int N = 16384, int r = 8, int p = 8)
{
Throw.IfNull(nep2, nameof(nep2));
Throw.IfNull(passphrase, nameof(passphrase));
byte[] data = nep2.Base58CheckDecode();
if (data.Length != 39 || data[0] != 0x01 || data[1] != 0x42 || data[2] != 0xe0)
{
throw new FormatException();
}
byte[] addressHash = new byte[4];
Buffer.BlockCopy(data, 3, addressHash, 0, 4);
byte[] datapassphrase = Encoding.UTF8.GetBytes(passphrase);
byte[] derivedkey = SCrypt.DeriveKey(datapassphrase, addressHash, N, r, p, 64);
Array.Clear(datapassphrase, 0, datapassphrase.Length);
byte[] derivedhalf1 = derivedkey.Take(32).ToArray();
byte[] derivedhalf2 = derivedkey.Skip(32).ToArray();
Array.Clear(derivedkey, 0, derivedkey.Length);
byte[] encryptedkey = new byte[32];
Buffer.BlockCopy(data, 7, encryptedkey, 0, 32);
Array.Clear(data, 0, data.Length);
byte[] prikey = XOR(encryptedkey.AES256Decrypt(derivedhalf2), derivedhalf1);
Array.Clear(derivedhalf1, 0, derivedhalf1.Length);
Array.Clear(derivedhalf2, 0, derivedhalf2.Length);
ECPoint pubkey = ECCurve.Secp256r1.G * prikey;
var keys = new NeoKeys(prikey);
var temp = Encoding.ASCII.GetBytes(keys.Address).Sha256().Sha256().Take(4).ToArray();
if (!temp.SequenceEqual(addressHash))
{
throw new FormatException("invalid passphrase when decrypting NEP2");
}
return(keys);
}
public Transaction SendAsset(NeoKeys fromKey, string symbol, IEnumerable <Transaction.Output> targets)
{
List <Transaction.Input> inputs;
List <Transaction.Output> outputs;
GenerateInputsOutputs(fromKey, symbol, targets, out inputs, out outputs);
Transaction tx = new Transaction()
{
type = TransactionType.ContractTransaction,
version = 0,
script = null,
gas = -1,
inputs = inputs.ToArray(),
outputs = outputs.ToArray()
};
tx.Sign(fromKey);
var ok = SendTransaction(tx);
return(ok ? tx : null);
}
public void GenerateInputsOutputs(UnspentEntries unspent, NeoKeys key, IEnumerable <Transaction.Output> targets, out List <Transaction.Input> inputs, out List <Transaction.Output> outputs, decimal system_fee = 0, bool allowSameSourceAndDest = false)
{
var from_script_hash = new UInt160(key.signatureHash.ToArray());
GenerateInputsOutputs(unspent, from_script_hash, targets, out inputs, out outputs, system_fee);
}
public IEnumerator CallContract(Action <Transaction, string> callback, UnspentEntries unspent, NeoKeys key, UInt160 scriptHash, object[] args, string interop, decimal fee = 0, string attachSymbol = null, IEnumerable <Transaction.Output> attachTargets = null)
{
var bytes = GenerateScript(scriptHash, args);
return(CallContract(callback, unspent, key, scriptHash, bytes, interop, fee, attachSymbol, attachTargets));
}
public Transaction Transfer(NeoKeys from_key, string to_address, decimal value)
{
return(Transfer(from_key, to_address.GetScriptHashFromAddress(), value));
}
public decimal BalanceOf(NeoKeys keys)
{
return(BalanceOf(keys.Address));
}
public IEnumerator CallContract(Action <Transaction, string> callback, UnspentEntries unspent, NeoKeys key, UInt160 scriptHash, string operation, object[] args, string interop, string attachSymbol = null, IEnumerable <Transaction.Output> attachTargets = null)
{
return(CallContract(callback, unspent, key, scriptHash, new object[] { operation, args }, interop, attachSymbol, attachTargets));
}
public Transaction Transfer(NeoKeys from_key, UInt160 to_address_hash, decimal value)
{
return(Transfer(from_key, to_address_hash.ToArray(), value));
}
public IEnumerator Transfer(UnspentEntries unspent, NeoKeys from_key, byte[] to_address_hash, BigInteger amount, string interop, Action <Transaction, string> callback)
{
var sender_address_hash = from_key.Address.GetScriptHashFromAddress();
return(api.CallContract(callback, unspent, from_key, ScriptHash, "transfer", new object[] { sender_address_hash, to_address_hash, amount }, interop));
}
public IEnumerator Transfer(UnspentEntries unspent, NeoKeys from_key, UInt160 to_address_hash, BigInteger amount, string interop, Action <Transaction, string> callback)
{
return(Transfer(unspent, from_key, to_address_hash.ToArray(), amount, interop, callback));
}
public static Transaction Deploy(NEP5 token, NeoKeys owner_key)
{
var response = token.api.CallContract(owner_key, token.ScriptHash, "deploy", new object[] { });
return(response);
}
public IEnumerator SendAsset(Action <Transaction, string> callback, UnspentEntries unspent, NeoKeys fromKey, string symbol, IEnumerable <Transaction.Output> targets, string interop, decimal fee = 0, bool allowSameSourceAndDest = false)
{
List <Transaction.Input> inputs;
List <Transaction.Output> outputs;
GenerateInputsOutputs(unspent, fromKey, symbol, targets, out inputs, out outputs, fee, allowSameSourceAndDest);
Transaction tx = new Transaction()
{
type = TransactionType.ContractTransaction,
version = 0,
script = null,
gas = -1,
inputs = inputs.ToArray(),
outputs = outputs.ToArray(),
interop = interop,
};
tx.Sign(fromKey);
return(SendTransaction(tx, (error) =>
{
callback(string.IsNullOrEmpty(error) ? tx : null, error);
}));
}
public IEnumerator CallContract(Action <Transaction, string> callback, UnspentEntries unspent, NeoKeys key, UInt160 scriptHash, byte[] bytes, string interop, decimal fee = 0, string attachSymbol = null, IEnumerable <Transaction.Output> attachTargets = null)
{
List <Transaction.Input> inputs = null;
List <Transaction.Output> outputs = null;
if (attachSymbol == null)
{
attachSymbol = "GAS";
}
if (!string.IsNullOrEmpty(attachSymbol))
{
GenerateInputsOutputs(unspent, key, attachSymbol, attachTargets, out inputs, out outputs, fee);
if (inputs.Count == 0)
{
throw new NeoException($"Not enough inputs for transaction");
}
}
var transaction = new Transaction()
{
type = TransactionType.InvocationTransaction,
version = 0,
script = bytes,
gas = 0,
inputs = inputs != null?inputs.ToArray() : null,
outputs = outputs != null?outputs.ToArray() : null,
attributes = inputs == null ? (new TransactionAttribute[] { new TransactionAttribute(TransactionAttributeUsage.Script, key.Address.AddressToScriptHash()) }) : null,
interop = interop
};
transaction.Sign(key);
return(SendTransaction(transaction, (error) =>
{
callback(string.IsNullOrEmpty(error) ? transaction : null, error);
}));
}
public IEnumerator SendAsset(Action <Transaction, string> callback, UnspentEntries unspent, NeoKeys fromKey, string toAddress, string symbol, decimal amount, string interop, decimal fee = 0, bool allowSameSourceAndDest = false)
{
if (!allowSameSourceAndDest && String.Equals(fromKey.Address, toAddress, StringComparison.OrdinalIgnoreCase))
{
throw new NeoException("Source and dest addresses are the same");
}
var toScriptHash = toAddress.GetScriptHashFromAddress();
var target = new Transaction.Output()
{
scriptHash = new UInt160(toScriptHash), value = amount
};
var targets = new List <Transaction.Output>()
{
target
};
return(SendAsset(callback, unspent, fromKey, symbol, targets, interop, fee, allowSameSourceAndDest));
}
public IEnumerator BalanceOf(NeoKeys keys, Action <BigInteger> callback)
{
return(BalanceOf(keys.Address, callback));
}
public IEnumerator GetAssetBalancesOf(NeoKeys key, Action <Dictionary <string, decimal> > callback)
{
return(GetAssetBalancesOf(key.Address, callback));
}
public IEnumerator Transfer(UnspentEntries unspent, NeoKeys from_key, string to_address, BigInteger amount, string interop, Action <Transaction, string> callback)
{
return(Transfer(unspent, from_key, to_address.GetScriptHashFromAddress(), amount, interop, callback));
}