Burn sys_fee (#1430)

neo-project · Mar 20, 2020 · a056f25 · a056f25
1 parent 4cc9717
commit a056f25
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Showing 4 changed files with 1 addition and 74 deletions.
diff --git a/src/neo/Network/P2P/Payloads/Transaction.cs b/src/neo/Network/P2P/Payloads/Transaction.cs
@@ -127,7 +127,7 @@ public int Size
         }
 
         /// <summary>
-        /// Distributed to NEO holders.
+        /// Fee to be burned.
         /// </summary>
         public long SystemFee
         {

diff --git a/src/neo/SmartContract/Native/Tokens/GasToken.cs b/src/neo/SmartContract/Native/Tokens/GasToken.cs
@@ -3,13 +3,8 @@
 using Neo.Cryptography.ECC;
 using Neo.Ledger;
 using Neo.Network.P2P.Payloads;
-using Neo.Persistence;
-using Neo.VM;
-using Neo.VM.Types;
-using System;
 using System.Linq;
 using System.Numerics;
-using VMArray = Neo.VM.Types.Array;
 
 namespace Neo.SmartContract.Native.Tokens
 {
@@ -21,8 +16,6 @@ public sealed class GasToken : Nep5Token<Nep5AccountState>
         public override string Symbol => "gas";
         public override byte Decimals => 8;
 
-        private const byte Prefix_SystemFeeAmount = 15;
-
         internal GasToken()
         {
         }
@@ -44,30 +37,7 @@ protected override bool OnPersist(ApplicationEngine engine)
             ECPoint[] validators = NEO.GetNextBlockValidators(engine.Snapshot);
             UInt160 primary = Contract.CreateSignatureRedeemScript(validators[engine.Snapshot.PersistingBlock.ConsensusData.PrimaryIndex]).ToScriptHash();
             Mint(engine, primary, engine.Snapshot.PersistingBlock.Transactions.Sum(p => p.NetworkFee));
-            BigInteger sys_fee = GetSysFeeAmount(engine.Snapshot, engine.Snapshot.PersistingBlock.Index - 1) + engine.Snapshot.PersistingBlock.Transactions.Sum(p => p.SystemFee);
-            StorageKey key = CreateStorageKey(Prefix_SystemFeeAmount, BitConverter.GetBytes(engine.Snapshot.PersistingBlock.Index));
-            engine.Snapshot.Storages.Add(key, new StorageItem
-            {
-                Value = sys_fee.ToByteArrayStandard(),
-                IsConstant = true
-            });
             return true;
         }
-
-        [ContractMethod(0_01000000, ContractParameterType.Integer, ParameterTypes = new[] { ContractParameterType.Integer }, ParameterNames = new[] { "index" }, SafeMethod = true)]
-        private StackItem GetSysFeeAmount(ApplicationEngine engine, VMArray args)
-        {
-            uint index = (uint)args[0].GetBigInteger();
-            return GetSysFeeAmount(engine.Snapshot, index);
-        }
-
-        public BigInteger GetSysFeeAmount(StoreView snapshot, uint index)
-        {
-            if (index == 0) return Blockchain.GenesisBlock.Transactions.Sum(p => p.SystemFee);
-            StorageKey key = CreateStorageKey(Prefix_SystemFeeAmount, BitConverter.GetBytes(index));
-            StorageItem storage = snapshot.Storages.TryGet(key);
-            if (storage is null) return BigInteger.Zero;
-            return new BigInteger(storage.Value);
-        }
     }
 }
diff --git a/src/neo/SmartContract/Native/Tokens/NeoToken.cs b/src/neo/SmartContract/Native/Tokens/NeoToken.cs
@@ -94,7 +94,6 @@ private BigInteger CalculateBonus(StoreView snapshot, BigInteger value, uint sta
                 }
                 amount += (iend - istart) * Blockchain.GenerationAmount[ustart];
             }
-            amount += (GAS.GetSysFeeAmount(snapshot, end - 1) - (start == 0 ? 0 : GAS.GetSysFeeAmount(snapshot, start - 1))) / GAS.Factor;
             return value * amount * GAS.Factor / TotalAmount;
         }
 

diff --git a/tests/neo.UnitTests/SmartContract/Native/Tokens/UT_GasToken.cs b/tests/neo.UnitTests/SmartContract/Native/Tokens/UT_GasToken.cs
@@ -7,7 +7,6 @@
 using Neo.SmartContract.Native;
 using Neo.UnitTests.Extensions;
 using Neo.VM;
-using Neo.VM.Types;
 using System;
 using System.Linq;
 using System.Numerics;
@@ -138,46 +137,5 @@ public void Check_BadScript()
 
             NativeContract.GAS.Invoke(engine).Should().BeFalse();
         }
-
-        [TestMethod]
-        public void TestGetSysFeeAmount1()
-        {
-            using (ApplicationEngine engine = NativeContract.GAS.TestCall("getSysFeeAmount", 2u))
-            {
-                engine.ResultStack.Peek().GetBigInteger().Should().Be(new BigInteger(0));
-                engine.ResultStack.Peek().GetType().Should().Be(typeof(Integer));
-            }
-
-            using (ApplicationEngine engine = NativeContract.GAS.TestCall("getSysFeeAmount", 0u))
-            {
-                engine.ResultStack.Peek().GetBigInteger().Should().Be(new BigInteger(0));
-            }
-        }
-
-        [TestMethod]
-        public void TestGetSysFeeAmount2()
-        {
-            var snapshot = Blockchain.Singleton.GetSnapshot();
-            NativeContract.GAS.GetSysFeeAmount(snapshot, 0).Should().Be(new BigInteger(0));
-            NativeContract.GAS.GetSysFeeAmount(snapshot, 1).Should().Be(new BigInteger(0));
-
-            byte[] key = BitConverter.GetBytes(1);
-            StorageKey storageKey = new StorageKey
-            {
-                Id = NativeContract.GAS.Id,
-                Key = new byte[sizeof(byte) + key.Length]
-            };
-            storageKey.Key[0] = 15;
-            key.CopyTo(storageKey.Key.AsSpan(1));
-
-            BigInteger sys_fee = new BigInteger(10);
-            snapshot.Storages.Add(storageKey, new StorageItem
-            {
-                Value = sys_fee.ToByteArrayStandard(),
-                IsConstant = true
-            });
-
-            NativeContract.GAS.GetSysFeeAmount(snapshot, 1).Should().Be(sys_fee);
-        }
     }
 }