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Optimize OnPersists #3146

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Optimize OnPersists #3146

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5edc48f
Optimize OnPersists
shargon Feb 17, 2024
4541116
Same don't hurt
shargon Feb 17, 2024
6c2ae90
Merge branch 'master' into core-optimize-persist
vncoelho Feb 22, 2024
952241c
Merge branch 'master' into core-optimize-persist
shargon May 24, 2024
80fa2be
Update src/Neo/SmartContract/Native/NeoToken.cs
shargon May 24, 2024
277a2b8
Merge branch 'master' into core-optimize-persist
Jim8y Jun 1, 2024
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48 changes: 45 additions & 3 deletions src/Neo/SmartContract/Native/NeoToken.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -47,6 +47,7 @@ public sealed class NeoToken : FungibleToken<NeoToken.NeoAccountState>
private const byte Prefix_Candidate = 33;
private const byte Prefix_Committee = 14;
private const byte Prefix_GasPerBlock = 29;
private const byte Prefix_GasPerBlockCurrent = 30;
private const byte Prefix_RegisterPrice = 13;
private const byte Prefix_VoterRewardPerCommittee = 23;

Expand Down Expand Up @@ -184,6 +185,7 @@ internal override ContractTask InitializeAsync(ApplicationEngine engine, Hardfor
engine.Snapshot.Add(CreateStorageKey(Prefix_Committee), new StorageItem(cachedCommittee));
engine.Snapshot.Add(CreateStorageKey(Prefix_VotersCount), new StorageItem(System.Array.Empty<byte>()));
engine.Snapshot.Add(CreateStorageKey(Prefix_GasPerBlock).AddBigEndian(0u), new StorageItem(5 * GAS.Factor));
engine.Snapshot.Add(CreateStorageKey(Prefix_GasPerBlockCurrent), new StorageItem(new GasPerBlock() { Gas = 5 * GAS.Factor, PreviousGas = 5 * GAS.Factor, Index = 0 }));
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Please, do not change the storage scheme, it's very easy to cache the value.

engine.Snapshot.Add(CreateStorageKey(Prefix_RegisterPrice), new StorageItem(1000 * GAS.Factor));
return Mint(engine, Contract.GetBFTAddress(engine.ProtocolSettings.StandbyValidators), TotalAmount, false);
}
Expand Down Expand Up @@ -262,9 +264,18 @@ private void SetGasPerBlock(ApplicationEngine engine, BigInteger gasPerBlock)
throw new ArgumentOutOfRangeException(nameof(gasPerBlock));
if (!CheckCommittee(engine)) throw new InvalidOperationException();

uint index = engine.PersistingBlock.Index + 1;
StorageItem entry = engine.Snapshot.GetAndChange(CreateStorageKey(Prefix_GasPerBlock).AddBigEndian(index), () => new StorageItem(gasPerBlock));
var gp = new GasPerBlock() { Gas = gasPerBlock, Index = engine.PersistingBlock.Index + 1 };
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one argument is missing here, no?
The correct constructor requires 3

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PreviousGas default value is 0


var entry = engine.Snapshot.GetAndChange(CreateStorageKey(Prefix_GasPerBlock).AddBigEndian(gp.Index), () => new StorageItem(gasPerBlock));
entry.Set(gasPerBlock);

// Set current entry

entry = engine.Snapshot.GetAndChange(CreateStorageKey(Prefix_GasPerBlockCurrent), () => new StorageItem(gp));
var gpCurrent = entry.GetInteroperable<GasPerBlock>();
gpCurrent.PreviousGas = gpCurrent.Gas;
gpCurrent.Gas = gasPerBlock;
gpCurrent.Index = gp.Index;
}

/// <summary>
Expand All @@ -275,7 +286,18 @@ private void SetGasPerBlock(ApplicationEngine engine, BigInteger gasPerBlock)
[ContractMethod(CpuFee = 1 << 15, RequiredCallFlags = CallFlags.ReadStates)]
public BigInteger GetGasPerBlock(DataCache snapshot)
{
return GetSortedGasRecords(snapshot, Ledger.CurrentIndex(snapshot) + 1).First().GasPerBlock;
var gp = snapshot.TryGet(CreateStorageKey(Prefix_GasPerBlockCurrent)).GetInteroperable<GasPerBlock>();

if (gp.Index <= Ledger.CurrentIndex(snapshot))
{
return gp.Gas;
}
else
{
return gp.PreviousGas;
}

//return GetSortedGasRecords(snapshot, Ledger.CurrentIndex(snapshot) + 1).First().GasPerBlock;
}

[ContractMethod(CpuFee = 1 << 15, RequiredCallFlags = CallFlags.States)]
Expand Down Expand Up @@ -620,6 +642,26 @@ protected override StackItem ElementToStackItem((ECPoint PublicKey, BigInteger V
}
}

private record GasPerBlock : IInteroperable
{
public uint Index;
public BigInteger Gas;
public BigInteger PreviousGas;

public void FromStackItem(StackItem stackItem)
{
Struct @struct = (Struct)stackItem;
Index = (uint)@struct[0].GetInteger();
Gas = @struct[1].GetInteger();
PreviousGas = @struct[2].GetInteger();
}

public StackItem ToStackItem(ReferenceCounter referenceCounter)
{
return new Struct(referenceCounter) { Index, Gas, PreviousGas };
}
}

private record GasDistribution
{
public UInt160 Account { get; init; }
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