Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

Fix policy check #1668

Merged
merged 3 commits into from
May 26, 2020
Merged

Fix policy check #1668

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
3 commits
Select commit Hold shift + click to select a range
3ce81ae
fix policy check
May 26, 2020
4442a06
Rename
erikzhang May 26, 2020
1663ffc
Fix GetCommitteeAddress()
erikzhang May 26, 2020
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
17 changes: 8 additions & 9 deletions src/neo/SmartContract/Native/PolicyContract.cs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -38,11 +38,10 @@ internal bool CheckPolicy(Transaction tx, StoreView snapshot)
return true;
}

private bool CheckValidators(ApplicationEngine engine)
private bool CheckCommittees(ApplicationEngine engine)
{
UInt256 prev_hash = engine.Snapshot.PersistingBlock.PrevHash;
TrimmedBlock prev_block = engine.Snapshot.Blocks[prev_hash];
return InteropService.Runtime.CheckWitnessInternal(engine, prev_block.NextConsensus);
UInt160 committeeMultiSigAddr = NEO.GetCommitteeAddress(engine.Snapshot);
return InteropService.Runtime.CheckWitnessInternal(engine, committeeMultiSigAddr);
}

internal override bool Initialize(ApplicationEngine engine)
Expand Down Expand Up @@ -114,7 +113,7 @@ public UInt160[] GetBlockedAccounts(StoreView snapshot)
[ContractMethod(0_03000000, ContractParameterType.Boolean, CallFlags.AllowModifyStates, ParameterTypes = new[] { ContractParameterType.Integer }, ParameterNames = new[] { "value" })]
private StackItem SetMaxBlockSize(ApplicationEngine engine, Array args)
{
if (!CheckValidators(engine)) return false;
if (!CheckCommittees(engine)) return false;
uint value = (uint)args[0].GetBigInteger();
if (Network.P2P.Message.PayloadMaxSize <= value) return false;
StorageItem storage = engine.Snapshot.Storages.GetAndChange(CreateStorageKey(Prefix_MaxBlockSize));
Expand All @@ -125,7 +124,7 @@ private StackItem SetMaxBlockSize(ApplicationEngine engine, Array args)
[ContractMethod(0_03000000, ContractParameterType.Boolean, CallFlags.AllowModifyStates, ParameterTypes = new[] { ContractParameterType.Integer }, ParameterNames = new[] { "value" })]
private StackItem SetMaxTransactionsPerBlock(ApplicationEngine engine, Array args)
{
if (!CheckValidators(engine)) return false;
if (!CheckCommittees(engine)) return false;
uint value = (uint)args[0].GetBigInteger();
StorageItem storage = engine.Snapshot.Storages.GetAndChange(CreateStorageKey(Prefix_MaxTransactionsPerBlock));
storage.Value = BitConverter.GetBytes(value);
Expand All @@ -135,7 +134,7 @@ private StackItem SetMaxTransactionsPerBlock(ApplicationEngine engine, Array arg
[ContractMethod(0_03000000, ContractParameterType.Boolean, CallFlags.AllowModifyStates, ParameterTypes = new[] { ContractParameterType.Integer }, ParameterNames = new[] { "value" })]
private StackItem SetFeePerByte(ApplicationEngine engine, Array args)
{
if (!CheckValidators(engine)) return false;
if (!CheckCommittees(engine)) return false;
long value = (long)args[0].GetBigInteger();
StorageItem storage = engine.Snapshot.Storages.GetAndChange(CreateStorageKey(Prefix_FeePerByte));
storage.Value = BitConverter.GetBytes(value);
Expand All @@ -145,7 +144,7 @@ private StackItem SetFeePerByte(ApplicationEngine engine, Array args)
[ContractMethod(0_03000000, ContractParameterType.Boolean, CallFlags.AllowModifyStates, ParameterTypes = new[] { ContractParameterType.Hash160 }, ParameterNames = new[] { "account" })]
private StackItem BlockAccount(ApplicationEngine engine, Array args)
{
if (!CheckValidators(engine)) return false;
if (!CheckCommittees(engine)) return false;
UInt160 account = new UInt160(args[0].GetSpan());
StorageKey key = CreateStorageKey(Prefix_BlockedAccounts);
StorageItem storage = engine.Snapshot.Storages[key];
Expand All @@ -159,7 +158,7 @@ private StackItem BlockAccount(ApplicationEngine engine, Array args)
[ContractMethod(0_03000000, ContractParameterType.Boolean, CallFlags.AllowModifyStates, ParameterTypes = new[] { ContractParameterType.Hash160 }, ParameterNames = new[] { "account" })]
private StackItem UnblockAccount(ApplicationEngine engine, Array args)
{
if (!CheckValidators(engine)) return false;
if (!CheckCommittees(engine)) return false;
UInt160 account = new UInt160(args[0].GetSpan());
StorageKey key = CreateStorageKey(Prefix_BlockedAccounts);
StorageItem storage = engine.Snapshot.Storages[key];
Expand Down
6 changes: 6 additions & 0 deletions src/neo/SmartContract/Native/Tokens/NeoToken.cs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -246,6 +246,12 @@ public ECPoint[] GetCommittee(StoreView snapshot)
return GetCommitteeMembers(snapshot, ProtocolSettings.Default.MaxCommitteeMembersCount).OrderBy(p => p).ToArray();
}

public UInt160 GetCommitteeAddress(StoreView snapshot)
{
ECPoint[] committees = GetCommittee(snapshot);
return Contract.CreateMultiSigRedeemScript(committees.Length - (committees.Length - 1) / 2, committees).ToScriptHash();
}

private IEnumerable<ECPoint> GetCommitteeMembers(StoreView snapshot, int count)
{
return GetCandidates(snapshot).OrderByDescending(p => p.Votes).ThenBy(p => p.PublicKey).Select(p => p.PublicKey).Take(count);
Expand Down
18 changes: 11 additions & 7 deletions tests/neo.UnitTests/SmartContract/Native/UT_PolicyContract.cs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -61,6 +61,8 @@ public void Check_SetMaxBlockSize()
snapshot.PersistingBlock = new Block() { Index = 1000, PrevHash = UInt256.Zero };
snapshot.Blocks.Add(UInt256.Zero, new Neo.Ledger.TrimmedBlock() { NextConsensus = UInt160.Zero });

UInt160 committeeMultiSigAddr = NativeContract.NEO.GetCommitteeAddress(snapshot);

NativeContract.Policy.Initialize(new ApplicationEngine(TriggerType.Application, null, snapshot, 0)).Should().BeTrue();

// Without signature
Expand All @@ -76,7 +78,7 @@ public void Check_SetMaxBlockSize()

// More than expected

ret = NativeContract.Policy.Call(snapshot, new Nep5NativeContractExtensions.ManualWitness(UInt160.Zero),
ret = NativeContract.Policy.Call(snapshot, new Nep5NativeContractExtensions.ManualWitness(committeeMultiSigAddr),
"setMaxBlockSize", new ContractParameter(ContractParameterType.Integer) { Value = Neo.Network.P2P.Message.PayloadMaxSize });
ret.Should().BeOfType<VM.Types.Boolean>();
ret.ToBoolean().Should().BeFalse();
Expand All @@ -87,7 +89,7 @@ public void Check_SetMaxBlockSize()

// With signature

ret = NativeContract.Policy.Call(snapshot, new Nep5NativeContractExtensions.ManualWitness(UInt160.Zero),
ret = NativeContract.Policy.Call(snapshot, new Nep5NativeContractExtensions.ManualWitness(committeeMultiSigAddr),
"setMaxBlockSize", new ContractParameter(ContractParameterType.Integer) { Value = 1024 });
ret.Should().BeOfType<VM.Types.Boolean>();
ret.ToBoolean().Should().BeTrue();
Expand Down Expand Up @@ -122,7 +124,7 @@ public void Check_SetMaxTransactionsPerBlock()

// With signature

ret = NativeContract.Policy.Call(snapshot, new Nep5NativeContractExtensions.ManualWitness(UInt160.Zero),
ret = NativeContract.Policy.Call(snapshot, new Nep5NativeContractExtensions.ManualWitness(NativeContract.NEO.GetCommitteeAddress(snapshot)),
"setMaxTransactionsPerBlock", new ContractParameter(ContractParameterType.Integer) { Value = 1 });
ret.Should().BeOfType<VM.Types.Boolean>();
ret.ToBoolean().Should().BeTrue();
Expand Down Expand Up @@ -156,8 +158,8 @@ public void Check_SetFeePerByte()
ret.GetBigInteger().Should().Be(1000);

// With signature

ret = NativeContract.Policy.Call(snapshot, new Nep5NativeContractExtensions.ManualWitness(UInt160.Zero),
UInt160 committeeMultiSigAddr = NativeContract.NEO.GetCommitteeAddress(snapshot);
ret = NativeContract.Policy.Call(snapshot, new Nep5NativeContractExtensions.ManualWitness(committeeMultiSigAddr),
"setFeePerByte", new ContractParameter(ContractParameterType.Integer) { Value = 1 });
ret.Should().BeOfType<VM.Types.Boolean>();
ret.ToBoolean().Should().BeTrue();
Expand All @@ -177,6 +179,8 @@ public void Check_Block_UnblockAccount()
snapshot.PersistingBlock = new Block() { Index = 1000, PrevHash = UInt256.Zero };
snapshot.Blocks.Add(UInt256.Zero, new Neo.Ledger.TrimmedBlock() { NextConsensus = UInt160.Zero });

UInt160 committeeMultiSigAddr = NativeContract.NEO.GetCommitteeAddress(snapshot);

NativeContract.Policy.Initialize(new ApplicationEngine(TriggerType.Application, null, snapshot, 0)).Should().BeTrue();

// Block without signature
Expand All @@ -192,7 +196,7 @@ public void Check_Block_UnblockAccount()

// Block with signature

ret = NativeContract.Policy.Call(snapshot, new Nep5NativeContractExtensions.ManualWitness(UInt160.Zero),
ret = NativeContract.Policy.Call(snapshot, new Nep5NativeContractExtensions.ManualWitness(committeeMultiSigAddr),
"blockAccount", new ContractParameter(ContractParameterType.Hash160) { Value = UInt160.Zero });
ret.Should().BeOfType<VM.Types.Boolean>();
ret.ToBoolean().Should().BeTrue();
Expand All @@ -216,7 +220,7 @@ public void Check_Block_UnblockAccount()

// Unblock with signature

ret = NativeContract.Policy.Call(snapshot, new Nep5NativeContractExtensions.ManualWitness(UInt160.Zero),
ret = NativeContract.Policy.Call(snapshot, new Nep5NativeContractExtensions.ManualWitness(committeeMultiSigAddr),
"unblockAccount", new ContractParameter(ContractParameterType.Hash160) { Value = UInt160.Zero });
ret.Should().BeOfType<VM.Types.Boolean>();
ret.ToBoolean().Should().BeTrue();
Expand Down