Add eth_simulate , support array of eth_call for simulation across multiple blocks

src/Nethermind/Ethereum.Test.Base/BlockchainTestBase.cs

@@ -148,9 +148,11 @@ protected async Task<EthereumTestResult> RunTest(BlockchainTest test, Stopwatch?
             IHeaderValidator headerValidator = new HeaderValidator(blockTree, Sealer, specProvider, _logManager);
             IUnclesValidator unclesValidator = new UnclesValidator(blockTree, headerValidator, _logManager);
             IBlockValidator blockValidator = new BlockValidator(txValidator, headerValidator, unclesValidator, specProvider, _logManager);
+            CodeInfoRepository codeInfoRepository = new();
             IVirtualMachine virtualMachine = new VirtualMachine(
                 blockhashProvider,
                 specProvider,
+                codeInfoRepository,
                 _logManager);
 
             IBlockProcessor blockProcessor = new BlockProcessor(
@@ -162,6 +164,7 @@ protected async Task<EthereumTestResult> RunTest(BlockchainTest test, Stopwatch?
                         specProvider,
                         stateProvider,
                         virtualMachine,
+                        codeInfoRepository,
                         _logManager),
                     stateProvider),
                 stateProvider,

src/Nethermind/Ethereum.Test.Base/GeneralTestBase.cs

@@ -71,15 +71,18 @@ protected EthereumTestResult RunTest(GeneralStateTest test, ITxTracer txTracer)
             TrieStore trieStore = new(stateDb, _logManager);
             WorldState stateProvider = new(trieStore, codeDb, _logManager);
             IBlockhashProvider blockhashProvider = new TestBlockhashProvider();
+            CodeInfoRepository codeInfoRepository = new();
             IVirtualMachine virtualMachine = new VirtualMachine(
                 blockhashProvider,
                 specProvider,
+                codeInfoRepository,
                 _logManager);
 
             TransactionProcessor transactionProcessor = new(
                 specProvider,
                 stateProvider,
                 virtualMachine,
+                codeInfoRepository,
                 _logManager);
 
             InitializeTestState(test, stateProvider, specProvider);

src/Nethermind/Nethermind.AccountAbstraction/Executor/IUserOperationSimulator.cs

@@ -18,7 +18,7 @@ ResultWrapper<Hash256> Simulate(UserOperation userOperation,
             UInt256? timestamp = null,
             CancellationToken cancellationToken = default);
 
-        BlockchainBridge.CallOutput EstimateGas(BlockHeader header, Transaction tx,
+        CallOutput EstimateGas(BlockHeader header, Transaction tx,
             CancellationToken cancellationToken);
     }
 }

src/Nethermind/Nethermind.AccountAbstraction/Executor/UserOperationSimulator.cs

@@ -185,7 +185,7 @@ private Transaction BuildSimulateValidationTransaction(
         }
 
         [Todo("Refactor once BlockchainBridge is separated")]
-        public BlockchainBridge.CallOutput EstimateGas(BlockHeader header, Transaction tx, CancellationToken cancellationToken)
+        public CallOutput EstimateGas(BlockHeader header, Transaction tx, CancellationToken cancellationToken)
         {
             ReadOnlyTxProcessingEnv txProcessingEnv = _readOnlyTxProcessingEnvFactory.Create();
             using IReadOnlyTransactionProcessor transactionProcessor = txProcessingEnv.Build(header.StateRoot!);
@@ -202,7 +202,7 @@ public BlockchainBridge.CallOutput EstimateGas(BlockHeader header, Transaction t
             GasEstimator gasEstimator = new(transactionProcessor, _stateProvider, _specProvider, _blocksConfig);
             long estimate = gasEstimator.Estimate(tx, header, estimateGasTracer, GasEstimator.DefaultErrorMargin, cancellationToken);
 
-            return new BlockchainBridge.CallOutput
+            return new CallOutput
             {
                 Error = tryCallResult.Success ? estimateGasTracer.Error : tryCallResult.Error,
                 GasSpent = estimate,

src/Nethermind/Nethermind.AccountAbstraction/Source/UserOperationTxSource.cs

@@ -172,7 +172,7 @@ public IEnumerable<Transaction> GetTransactions(BlockHeader parent, long gasLimi
                 // TODO: Remove logging, just for testing
                 _logger.Info($"Constructed tx from {userOperationsToInclude!.Count} userOperations: {userOperationTransaction.Hash}");
 
-                BlockchainBridge.CallOutput callOutput = _userOperationSimulators[entryPoint].EstimateGas(parent, userOperationTransaction, CancellationToken.None);
+                CallOutput callOutput = _userOperationSimulators[entryPoint].EstimateGas(parent, userOperationTransaction, CancellationToken.None);
                 FailedOp? failedOp = txBuilder.DecodeEntryPointOutputError(callOutput.OutputData);
                 if (failedOp is not null)
                 {

src/Nethermind/Nethermind.Api/NethermindApi.cs

@@ -31,6 +31,7 @@
 using Nethermind.Evm.TransactionProcessing;
 using Nethermind.Facade;
 using Nethermind.Facade.Eth;
+using Nethermind.Facade.Simulate;
 using Nethermind.Grpc;
 using Nethermind.JsonRpc;
 using Nethermind.JsonRpc.Modules;
@@ -81,11 +82,20 @@ public IBlockchainBridge CreateBlockchainBridge()
                 SpecProvider,
                 LogManager);
 
+            SimulateReadOnlyBlocksProcessingEnvFactory simulateReadOnlyBlocksProcessingEnvFactory =
+                new SimulateReadOnlyBlocksProcessingEnvFactory(
+                    WorldStateManager!,
+                    readOnlyTree,
+                    DbProvider!,
+                    SpecProvider!,
+                    LogManager);
+
             IMiningConfig miningConfig = ConfigProvider.GetConfig<IMiningConfig>();
             IBlocksConfig blocksConfig = ConfigProvider.GetConfig<IBlocksConfig>();
 
             return new BlockchainBridge(
                 readOnlyTxProcessingEnv,
+                simulateReadOnlyBlocksProcessingEnvFactory,
                 TxPool,
                 ReceiptFinder,
                 FilterStore,

src/Nethermind/Nethermind.Blockchain.Test/Producers/DevBlockproducerTests.cs

@@ -58,14 +58,17 @@ public void Test()
                 LimboLogs.Instance);
             StateReader stateReader = new(trieStore, dbProvider.GetDb<IDb>(DbNames.State), LimboLogs.Instance);
             BlockhashProvider blockhashProvider = new(blockTree, specProvider, stateProvider, LimboLogs.Instance);
+            CodeInfoRepository codeInfoRepository = new();
             VirtualMachine virtualMachine = new(
                 blockhashProvider,
                 specProvider,
+                codeInfoRepository,
                 LimboLogs.Instance);
             TransactionProcessor txProcessor = new(
                 specProvider,
                 stateProvider,
                 virtualMachine,
+                codeInfoRepository,
                 LimboLogs.Instance);
             BlockProcessor blockProcessor = new(
                 specProvider,

src/Nethermind/Nethermind.Blockchain.Test/ReorgTests.cs

@@ -57,14 +57,17 @@ public void Setup()
             LimboLogs.Instance,
             transactionComparerProvider.GetDefaultComparer());
         BlockhashProvider blockhashProvider = new(_blockTree, specProvider, stateProvider, LimboLogs.Instance);
+        CodeInfoRepository codeInfoRepository = new();
         VirtualMachine virtualMachine = new(
             blockhashProvider,
             specProvider,
+            codeInfoRepository,
             LimboLogs.Instance);
         TransactionProcessor transactionProcessor = new(
             specProvider,
             stateProvider,
             virtualMachine,
+            codeInfoRepository,
             LimboLogs.Instance);
 
         BlockProcessor blockProcessor = new(

src/Nethermind/Nethermind.Blockchain.Test/TransactionSelectorTests.cs

@@ -195,7 +195,7 @@ public void Proper_transactions_selected(ProperTransactionsSelectedTestCase test
             MemDb stateDb = new();
             MemDb codeDb = new();
             TrieStore trieStore = new(stateDb, LimboLogs.Instance);
-            WorldState stateProvider = new(trieStore, codeDb, LimboLogs.Instance);
+            IWorldState stateProvider = new WorldState(trieStore, codeDb, LimboLogs.Instance);
             StateReader _ = new(new TrieStore(stateDb, LimboLogs.Instance), codeDb, LimboLogs.Instance);
             ISpecProvider specProvider = Substitute.For<ISpecProvider>();
 

src/Nethermind/Nethermind.Blockchain.Test/TransactionsExecutorTests.cs

@@ -262,7 +262,7 @@ public void Proper_transactions_selected(TransactionSelectorTests.ProperTransact
             MemDb stateDb = new();
             MemDb codeDb = new();
             TrieStore trieStore = new(stateDb, LimboLogs.Instance);
-            WorldState stateProvider = new(trieStore, codeDb, LimboLogs.Instance);
+            IWorldState stateProvider = new WorldState(trieStore, codeDb, LimboLogs.Instance);
             ISpecProvider specProvider = Substitute.For<ISpecProvider>();
 
             IReleaseSpec spec = testCase.ReleaseSpec;

src/Nethermind/Nethermind.Blockchain/BlockTree.cs

@@ -801,22 +801,17 @@ private void DeleteBlocks(Hash256 deletePointer)
             return childHash;
         }
 
-        public bool IsMainChain(BlockHeader blockHeader)
-        {
-            ChainLevelInfo? chainLevelInfo = LoadLevel(blockHeader.Number);
-            bool isMain = chainLevelInfo is not null && chainLevelInfo.MainChainBlock?.BlockHash.Equals(blockHeader.Hash) == true;
-            return isMain;
-        }
+        public bool IsMainChain(BlockHeader blockHeader) =>
+            LoadLevel(blockHeader.Number)?.MainChainBlock?.BlockHash.Equals(blockHeader.Hash) == true;
 
-        public bool IsMainChain(Hash256 blockHash)
+        public bool IsMainChain(Hash256 blockHash, bool throwOnMissingHash = true)
         {
             BlockHeader? header = FindHeader(blockHash, BlockTreeLookupOptions.TotalDifficultyNotNeeded);
-            if (header is null)
-            {
-                throw new InvalidOperationException($"Not able to retrieve block number for an unknown block {blockHash}");
-            }
-
-            return IsMainChain(header);
+            return header is not null
+                ? IsMainChain(header)
+                : throwOnMissingHash
+                    ? throw new InvalidOperationException($"Not able to retrieve block number for an unknown block {blockHash}")
+                    : false;
         }
 
         public BlockHeader? FindBestSuggestedHeader() => BestSuggestedHeader;