add multi-sig-transfer

src/RpcClient/Nep5API.cs

@@ -1,8 +1,10 @@
+using Neo.Cryptography.ECC;
 using Neo.Network.P2P.Payloads;
 using Neo.Network.RPC.Models;
 using Neo.SmartContract;
 using Neo.VM;
 using Neo.Wallets;
+using System;
 using System.Linq;
 using System.Numerics;
 using static Neo.Helper;
@@ -117,5 +119,32 @@ public Transaction CreateTransferTx(UInt160 scriptHash, KeyPair fromKey, UInt160
 
             return tx;
         }
+
+        /// <summary>
+        /// Create NEP5 token transfer transaction from multi-sig account
+        /// </summary>
+        /// <param name="scriptHash">contract script hash</param>
+        /// <param name="m">multi-sig min signature count</param>
+        /// <param name="pubKeys">multi-sig pubKeys</param>
+        /// <param name="fromKeys">sign keys</param>
+        /// <param name="to">to account</param>
+        /// <param name="amount">transfer amount</param>
+        /// <returns></returns>
+        public Transaction CreateTransferTx(UInt160 scriptHash, int m, ECPoint[] pubKeys, KeyPair[] fromKeys, UInt160 to, BigInteger amount)
+        {
+            if (m > fromKeys.Length)
+                throw new ArgumentException($"Need at least {m} KeyPairs for signing!");
+            var sender = Contract.CreateMultiSigContract(m, pubKeys).ScriptHash;
+            Cosigner[] cosigners = new[] { new Cosigner { Scopes = WitnessScope.CalledByEntry, Account = sender } };
+
+            byte[] script = scriptHash.MakeScript("transfer", sender, to, amount);
+            Transaction tx = new TransactionManager(rpcClient, sender)
+                .MakeTransaction(script, null, cosigners)
+                .AddMultiSig(fromKeys, m, pubKeys)
+                .Sign()
+                .Tx;
+
+            return tx;
+        }
     }
 }

src/RpcClient/RpcClient.cs

@@ -316,9 +316,14 @@ public UInt256 SubmitBlock(byte[] block)
         /// Returns the result after calling a smart contract at scripthash with the given operation and parameters.
         /// This RPC call does not affect the blockchain in any way.
         /// </summary>
-        public RpcInvokeResult InvokeFunction(string scriptHash, string operation, RpcStack[] stacks)
+        public RpcInvokeResult InvokeFunction(string scriptHash, string operation, RpcStack[] stacks, params UInt160[] scriptHashesForVerifying)
         {
-            return RpcInvokeResult.FromJson(RpcSend("invokefunction", scriptHash, operation, stacks.Select(p => p.ToJson()).ToArray()));
+            List<JObject> parameters = new List<JObject> { scriptHash, operation, stacks.Select(p => p.ToJson()).ToArray() };
+            if (scriptHashesForVerifying.Length > 0)
+            {
+                parameters.Add(scriptHashesForVerifying.Select(p => (JObject)p.ToString()).ToArray());
+            }
+            return RpcInvokeResult.FromJson(RpcSend("invokefunction", parameters.ToArray()));
         }
 
         /// <summary>
@@ -327,11 +332,11 @@ public RpcInvokeResult InvokeFunction(string scriptHash, string operation, RpcSt
         /// </summary>
         public RpcInvokeResult InvokeScript(byte[] script, params UInt160[] scriptHashesForVerifying)
         {
-            List<JObject> parameters = new List<JObject>
+            List<JObject> parameters = new List<JObject> { script.ToHexString() };
+            if (scriptHashesForVerifying.Length > 0)
             {
-                script.ToHexString()
-            };
-            parameters.AddRange(scriptHashesForVerifying.Select(p => (JObject)p.ToString()));
+                parameters.Add(scriptHashesForVerifying.Select(p => (JObject)p.ToString()).ToArray());
+            }
             return RpcInvokeResult.FromJson(RpcSend("invokescript", parameters.ToArray()));
         }
 

src/RpcClient/TransactionManager.cs

@@ -78,7 +78,6 @@ public TransactionManager MakeTransaction(byte[] script, TransactionAttribute[]
             UInt160[] hashes = Tx.GetScriptHashesForVerifying(null);
             RpcInvokeResult result = rpcClient.InvokeScript(script, hashes);
             Tx.SystemFee = Math.Max(long.Parse(result.GasConsumed) - ApplicationEngine.GasFree, 0);
-
             context = new ContractParametersContext(Tx);
             signStore = new List<SignItem>();
 
@@ -141,6 +140,21 @@ public TransactionManager AddMultiSig(KeyPair key, int m, params ECPoint[] publi
             return this;
         }
 
+        /// <summary>
+        /// Add Multi-Signature
+        /// </summary>
+        /// <param name="keys">The KeyPairs to sign transction</param>
+        /// <param name="m">The least count of signatures needed for multiple signature contract</param>
+        /// <param name="publicKeys">The Public Keys construct the multiple signature contract</param>
+        public TransactionManager AddMultiSig(KeyPair[] keys, int m, params ECPoint[] publicKeys)
+        {
+            foreach (var key in keys)
+            {
+                AddMultiSig(key, m, publicKeys);
+            }
+            return this;
+        }
+
         private void AddSignItem(Contract contract, KeyPair key)
         {
             if (!Tx.GetScriptHashesForVerifying(null).Contains(contract.ScriptHash))

src/RpcClient/Utility.cs

@@ -76,7 +76,7 @@ public static UInt160 GetScriptHash(string account)
         /// <param name="amount">float value</param>
         /// <param name="decimals">token decimals</param>
         /// <returns></returns>
-        internal static BigInteger ToBigInteger(this decimal amount, uint decimals)
+        public static BigInteger ToBigInteger(this decimal amount, uint decimals)
         {
             BigInteger factor = BigInteger.Pow(10, (int)decimals);
             var (numerator, denominator) = Fraction(amount);

src/RpcClient/WalletAPI.cs

@@ -1,3 +1,4 @@
+using Neo.Cryptography.ECC;
 using Neo.Ledger;
 using Neo.Network.P2P.Payloads;
 using Neo.Network.RPC.Models;
@@ -142,7 +143,7 @@ public Transaction Transfer(string tokenHash, string fromKey, string toAddress,
         }
 
         /// <summary>
-        /// Transfer NEP5 token balance
+        /// Transfer NEP5 token from single-sig account
         /// </summary>
         /// <param name="scriptHash">contract script hash</param>
         /// <param name="from">from KeyPair</param>
@@ -156,6 +157,23 @@ public Transaction Transfer(UInt160 scriptHash, KeyPair from, UInt160 to, BigInt
             return transaction;
         }
 
+        /// <summary>
+        /// Transfer NEP5 token from multi-sig account
+        /// </summary>
+        /// <param name="scriptHash">contract script hash</param>
+        /// <param name="m">multi-sig min signature count</param>
+        /// <param name="pubKeys">multi-sig pubKeys</param>
+        /// <param name="keys">sign keys</param>
+        /// <param name="to">to account</param>
+        /// <param name="amountInteger">transfer amount</param>
+        /// <returns></returns>
+        public Transaction Transfer(UInt160 scriptHash, int m, ECPoint[] pubKeys, KeyPair[] keys, UInt160 to, BigInteger amountInteger)
+        {
+            Transaction transaction = nep5API.CreateTransferTx(scriptHash, m, pubKeys, keys, to, amountInteger);
+            rpcClient.SendRawTransaction(transaction);
+            return transaction;
+        }
+
         /// <summary>
         /// Wait until the transaction is observable block chain
         /// </summary>

tests/Neo.Network.RPC.Tests/UT_TransactionManager.cs

@@ -127,9 +127,10 @@ public void TestSign()
             byte[] signature = tx.Witnesses[0].InvocationScript.Skip(2).ToArray();
 
             Assert.IsTrue(Crypto.VerifySignature(tx.GetHashData(), signature, keyPair1.PublicKey.EncodePoint(false).Skip(1).ToArray()));
-            // verify network fee
+            // verify network fee and system fee
             long networkFee = tx.Size * (long)1000 + ApplicationEngine.OpCodePrices[OpCode.PUSHDATA1] + ApplicationEngine.OpCodePrices[OpCode.PUSHDATA1] + ApplicationEngine.OpCodePrices[OpCode.PUSHNULL] + InteropService.GetPrice(InteropService.Crypto.ECDsaVerify, null, null);
             Assert.AreEqual(networkFee, tx.NetworkFee);
+            Assert.AreEqual(100, tx.SystemFee);
 
             // duplicate sign should not add new witness
             txManager.AddSignature(keyPair1).Sign();

tests/Neo.Network.RPC.Tests/UT_WalletAPI.cs

@@ -19,12 +19,14 @@ public class UT_WalletAPI
         string address1;
         UInt160 sender;
         WalletAPI walletAPI;
+        UInt160 multiSender;
 
         [TestInitialize]
         public void TestSetup()
         {
             keyPair1 = new KeyPair(Wallet.GetPrivateKeyFromWIF("KyXwTh1hB76RRMquSvnxZrJzQx7h9nQP2PCRL38v6VDb5ip3nf1p"));
             sender = Contract.CreateSignatureRedeemScript(keyPair1.PublicKey).ToScriptHash();
+            multiSender = Contract.CreateMultiSigContract(1, keyPair1.PublicKey).ScriptHash;
             address1 = Wallets.Helper.ToAddress(sender);
             rpcClientMock = UT_TransactionManager.MockRpcClient(sender, new byte[0]);
             walletAPI = new WalletAPI(rpcClientMock.Object);
@@ -104,6 +106,28 @@ public void TestTransfer()
             Assert.AreEqual(testScript.ToHexString(), tranaction.Script.ToHexString());
         }
 
+        [TestMethod]
+        public void TestTransferfromMultiSigAccount()
+        {
+            byte[] balanceScript = NativeContract.GAS.Hash.MakeScript("balanceOf", multiSender);
+            var balanceResult = new ContractParameter() { Type = ContractParameterType.Integer, Value = BigInteger.Parse("10000000000000000") };
+
+            UT_TransactionManager.MockInvokeScript(rpcClientMock, balanceScript, balanceResult);
+
+            byte[] decimalsScript = NativeContract.GAS.Hash.MakeScript("decimals");
+            UT_TransactionManager.MockInvokeScript(rpcClientMock, decimalsScript, new ContractParameter { Type = ContractParameterType.Integer, Value = new BigInteger(8) });
+
+            byte[] testScript = NativeContract.GAS.Hash.MakeScript("transfer", multiSender, UInt160.Zero, NativeContract.GAS.Factor * 100);
+            UT_TransactionManager.MockInvokeScript(rpcClientMock, testScript, new ContractParameter { Type = ContractParameterType.Integer, Value = new BigInteger(1_10000000) });
+
+            var json = new JObject();
+            json["hash"] = UInt256.Zero.ToString();
+            rpcClientMock.Setup(p => p.RpcSend("sendrawtransaction", It.IsAny<JObject>())).Returns(json);
+
+            var tranaction = walletAPI.Transfer(NativeContract.GAS.Hash, 1, new[] { keyPair1.PublicKey }, new[] { keyPair1 }, UInt160.Zero, NativeContract.GAS.Factor * 100);
+            Assert.AreEqual(testScript.ToHexString(), tranaction.Script.ToHexString());
+        }
+
         [TestMethod]
         public void TestWaitTransaction()
         {