github.com/eduardonunesp/go-ethereum@v1.8.9-0.20180514135602-f6bc65fc6811/eth/api_tracer.go (about) 1 // Copyright 2017 The go-ethereum Authors 2 // This file is part of the go-ethereum library. 3 // 4 // The go-ethereum library is free software: you can redistribute it and/or modify 5 // it under the terms of the GNU Lesser General Public License as published by 6 // the Free Software Foundation, either version 3 of the License, or 7 // (at your option) any later version. 8 // 9 // The go-ethereum library is distributed in the hope that it will be useful, 10 // but WITHOUT ANY WARRANTY; without even the implied warranty of 11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 // GNU Lesser General Public License for more details. 13 // 14 // You should have received a copy of the GNU Lesser General Public License 15 // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>. 16 17 package eth 18 19 import ( 20 "bytes" 21 "context" 22 "errors" 23 "fmt" 24 "io/ioutil" 25 "runtime" 26 "sync" 27 "time" 28 29 "github.com/ethereum/go-ethereum/common" 30 "github.com/ethereum/go-ethereum/common/hexutil" 31 "github.com/ethereum/go-ethereum/core" 32 "github.com/ethereum/go-ethereum/core/rawdb" 33 "github.com/ethereum/go-ethereum/core/state" 34 "github.com/ethereum/go-ethereum/core/types" 35 "github.com/ethereum/go-ethereum/core/vm" 36 "github.com/ethereum/go-ethereum/eth/tracers" 37 "github.com/ethereum/go-ethereum/internal/ethapi" 38 "github.com/ethereum/go-ethereum/log" 39 "github.com/ethereum/go-ethereum/rlp" 40 "github.com/ethereum/go-ethereum/rpc" 41 "github.com/ethereum/go-ethereum/trie" 42 ) 43 44 const ( 45 // defaultTraceTimeout is the amount of time a single transaction can execute 46 // by default before being forcefully aborted. 47 defaultTraceTimeout = 5 * time.Second 48 49 // defaultTraceReexec is the number of blocks the tracer is willing to go back 50 // and reexecute to produce missing historical state necessary to run a specific 51 // trace. 52 defaultTraceReexec = uint64(128) 53 ) 54 55 // TraceConfig holds extra parameters to trace functions. 56 type TraceConfig struct { 57 *vm.LogConfig 58 Tracer *string 59 Timeout *string 60 Reexec *uint64 61 } 62 63 // txTraceResult is the result of a single transaction trace. 64 type txTraceResult struct { 65 Result interface{} `json:"result,omitempty"` // Trace results produced by the tracer 66 Error string `json:"error,omitempty"` // Trace failure produced by the tracer 67 } 68 69 // blockTraceTask represents a single block trace task when an entire chain is 70 // being traced. 71 type blockTraceTask struct { 72 statedb *state.StateDB // Intermediate state prepped for tracing 73 block *types.Block // Block to trace the transactions from 74 rootref common.Hash // Trie root reference held for this task 75 results []*txTraceResult // Trace results procudes by the task 76 } 77 78 // blockTraceResult represets the results of tracing a single block when an entire 79 // chain is being traced. 80 type blockTraceResult struct { 81 Block hexutil.Uint64 `json:"block"` // Block number corresponding to this trace 82 Hash common.Hash `json:"hash"` // Block hash corresponding to this trace 83 Traces []*txTraceResult `json:"traces"` // Trace results produced by the task 84 } 85 86 // txTraceTask represents a single transaction trace task when an entire block 87 // is being traced. 88 type txTraceTask struct { 89 statedb *state.StateDB // Intermediate state prepped for tracing 90 index int // Transaction offset in the block 91 } 92 93 // TraceChain returns the structured logs created during the execution of EVM 94 // between two blocks (excluding start) and returns them as a JSON object. 95 func (api *PrivateDebugAPI) TraceChain(ctx context.Context, start, end rpc.BlockNumber, config *TraceConfig) (*rpc.Subscription, error) { 96 // Fetch the block interval that we want to trace 97 var from, to *types.Block 98 99 switch start { 100 case rpc.PendingBlockNumber: 101 from = api.eth.miner.PendingBlock() 102 case rpc.LatestBlockNumber: 103 from = api.eth.blockchain.CurrentBlock() 104 default: 105 from = api.eth.blockchain.GetBlockByNumber(uint64(start)) 106 } 107 switch end { 108 case rpc.PendingBlockNumber: 109 to = api.eth.miner.PendingBlock() 110 case rpc.LatestBlockNumber: 111 to = api.eth.blockchain.CurrentBlock() 112 default: 113 to = api.eth.blockchain.GetBlockByNumber(uint64(end)) 114 } 115 // Trace the chain if we've found all our blocks 116 if from == nil { 117 return nil, fmt.Errorf("starting block #%d not found", start) 118 } 119 if to == nil { 120 return nil, fmt.Errorf("end block #%d not found", end) 121 } 122 return api.traceChain(ctx, from, to, config) 123 } 124 125 // traceChain configures a new tracer according to the provided configuration, and 126 // executes all the transactions contained within. The return value will be one item 127 // per transaction, dependent on the requestd tracer. 128 func (api *PrivateDebugAPI) traceChain(ctx context.Context, start, end *types.Block, config *TraceConfig) (*rpc.Subscription, error) { 129 // Tracing a chain is a **long** operation, only do with subscriptions 130 notifier, supported := rpc.NotifierFromContext(ctx) 131 if !supported { 132 return &rpc.Subscription{}, rpc.ErrNotificationsUnsupported 133 } 134 sub := notifier.CreateSubscription() 135 136 // Ensure we have a valid starting state before doing any work 137 origin := start.NumberU64() 138 database := state.NewDatabase(api.eth.ChainDb()) 139 140 if number := start.NumberU64(); number > 0 { 141 start = api.eth.blockchain.GetBlock(start.ParentHash(), start.NumberU64()-1) 142 if start == nil { 143 return nil, fmt.Errorf("parent block #%d not found", number-1) 144 } 145 } 146 statedb, err := state.New(start.Root(), database) 147 if err != nil { 148 // If the starting state is missing, allow some number of blocks to be reexecuted 149 reexec := defaultTraceReexec 150 if config != nil && config.Reexec != nil { 151 reexec = *config.Reexec 152 } 153 // Find the most recent block that has the state available 154 for i := uint64(0); i < reexec; i++ { 155 start = api.eth.blockchain.GetBlock(start.ParentHash(), start.NumberU64()-1) 156 if start == nil { 157 break 158 } 159 if statedb, err = state.New(start.Root(), database); err == nil { 160 break 161 } 162 } 163 // If we still don't have the state available, bail out 164 if err != nil { 165 switch err.(type) { 166 case *trie.MissingNodeError: 167 return nil, errors.New("required historical state unavailable") 168 default: 169 return nil, err 170 } 171 } 172 } 173 // Execute all the transaction contained within the chain concurrently for each block 174 blocks := int(end.NumberU64() - origin) 175 176 threads := runtime.NumCPU() 177 if threads > blocks { 178 threads = blocks 179 } 180 var ( 181 pend = new(sync.WaitGroup) 182 tasks = make(chan *blockTraceTask, threads) 183 results = make(chan *blockTraceTask, threads) 184 ) 185 for th := 0; th < threads; th++ { 186 pend.Add(1) 187 go func() { 188 defer pend.Done() 189 190 // Fetch and execute the next block trace tasks 191 for task := range tasks { 192 signer := types.MakeSigner(api.config, task.block.Number()) 193 194 // Trace all the transactions contained within 195 for i, tx := range task.block.Transactions() { 196 msg, _ := tx.AsMessage(signer) 197 vmctx := core.NewEVMContext(msg, task.block.Header(), api.eth.blockchain, nil) 198 199 res, err := api.traceTx(ctx, msg, vmctx, task.statedb, config) 200 if err != nil { 201 task.results[i] = &txTraceResult{Error: err.Error()} 202 log.Warn("Tracing failed", "hash", tx.Hash(), "block", task.block.NumberU64(), "err", err) 203 break 204 } 205 task.statedb.Finalise(true) 206 task.results[i] = &txTraceResult{Result: res} 207 } 208 // Stream the result back to the user or abort on teardown 209 select { 210 case results <- task: 211 case <-notifier.Closed(): 212 return 213 } 214 } 215 }() 216 } 217 // Start a goroutine to feed all the blocks into the tracers 218 begin := time.Now() 219 220 go func() { 221 var ( 222 logged time.Time 223 number uint64 224 traced uint64 225 failed error 226 proot common.Hash 227 ) 228 // Ensure everything is properly cleaned up on any exit path 229 defer func() { 230 close(tasks) 231 pend.Wait() 232 233 switch { 234 case failed != nil: 235 log.Warn("Chain tracing failed", "start", start.NumberU64(), "end", end.NumberU64(), "transactions", traced, "elapsed", time.Since(begin), "err", failed) 236 case number < end.NumberU64(): 237 log.Warn("Chain tracing aborted", "start", start.NumberU64(), "end", end.NumberU64(), "abort", number, "transactions", traced, "elapsed", time.Since(begin)) 238 default: 239 log.Info("Chain tracing finished", "start", start.NumberU64(), "end", end.NumberU64(), "transactions", traced, "elapsed", time.Since(begin)) 240 } 241 close(results) 242 }() 243 // Feed all the blocks both into the tracer, as well as fast process concurrently 244 for number = start.NumberU64() + 1; number <= end.NumberU64(); number++ { 245 // Stop tracing if interruption was requested 246 select { 247 case <-notifier.Closed(): 248 return 249 default: 250 } 251 // Print progress logs if long enough time elapsed 252 if time.Since(logged) > 8*time.Second { 253 if number > origin { 254 log.Info("Tracing chain segment", "start", origin, "end", end.NumberU64(), "current", number, "transactions", traced, "elapsed", time.Since(begin), "memory", database.TrieDB().Size()) 255 } else { 256 log.Info("Preparing state for chain trace", "block", number, "start", origin, "elapsed", time.Since(begin)) 257 } 258 logged = time.Now() 259 } 260 // Retrieve the next block to trace 261 block := api.eth.blockchain.GetBlockByNumber(number) 262 if block == nil { 263 failed = fmt.Errorf("block #%d not found", number) 264 break 265 } 266 // Send the block over to the concurrent tracers (if not in the fast-forward phase) 267 if number > origin { 268 txs := block.Transactions() 269 270 select { 271 case tasks <- &blockTraceTask{statedb: statedb.Copy(), block: block, rootref: proot, results: make([]*txTraceResult, len(txs))}: 272 case <-notifier.Closed(): 273 return 274 } 275 traced += uint64(len(txs)) 276 } 277 // Generate the next state snapshot fast without tracing 278 _, _, _, err := api.eth.blockchain.Processor().Process(block, statedb, vm.Config{}) 279 if err != nil { 280 failed = err 281 break 282 } 283 // Finalize the state so any modifications are written to the trie 284 root, err := statedb.Commit(true) 285 if err != nil { 286 failed = err 287 break 288 } 289 if err := statedb.Reset(root); err != nil { 290 failed = err 291 break 292 } 293 // Reference the trie twice, once for us, once for the trancer 294 database.TrieDB().Reference(root, common.Hash{}) 295 if number >= origin { 296 database.TrieDB().Reference(root, common.Hash{}) 297 } 298 // Dereference all past tries we ourselves are done working with 299 database.TrieDB().Dereference(proot, common.Hash{}) 300 proot = root 301 } 302 }() 303 304 // Keep reading the trace results and stream the to the user 305 go func() { 306 var ( 307 done = make(map[uint64]*blockTraceResult) 308 next = origin + 1 309 ) 310 for res := range results { 311 // Queue up next received result 312 result := &blockTraceResult{ 313 Block: hexutil.Uint64(res.block.NumberU64()), 314 Hash: res.block.Hash(), 315 Traces: res.results, 316 } 317 done[uint64(result.Block)] = result 318 319 // Dereference any paret tries held in memory by this task 320 database.TrieDB().Dereference(res.rootref, common.Hash{}) 321 322 // Stream completed traces to the user, aborting on the first error 323 for result, ok := done[next]; ok; result, ok = done[next] { 324 if len(result.Traces) > 0 || next == end.NumberU64() { 325 notifier.Notify(sub.ID, result) 326 } 327 delete(done, next) 328 next++ 329 } 330 } 331 }() 332 return sub, nil 333 } 334 335 // TraceBlockByNumber returns the structured logs created during the execution of 336 // EVM and returns them as a JSON object. 337 func (api *PrivateDebugAPI) TraceBlockByNumber(ctx context.Context, number rpc.BlockNumber, config *TraceConfig) ([]*txTraceResult, error) { 338 // Fetch the block that we want to trace 339 var block *types.Block 340 341 switch number { 342 case rpc.PendingBlockNumber: 343 block = api.eth.miner.PendingBlock() 344 case rpc.LatestBlockNumber: 345 block = api.eth.blockchain.CurrentBlock() 346 default: 347 block = api.eth.blockchain.GetBlockByNumber(uint64(number)) 348 } 349 // Trace the block if it was found 350 if block == nil { 351 return nil, fmt.Errorf("block #%d not found", number) 352 } 353 return api.traceBlock(ctx, block, config) 354 } 355 356 // TraceBlockByHash returns the structured logs created during the execution of 357 // EVM and returns them as a JSON object. 358 func (api *PrivateDebugAPI) TraceBlockByHash(ctx context.Context, hash common.Hash, config *TraceConfig) ([]*txTraceResult, error) { 359 block := api.eth.blockchain.GetBlockByHash(hash) 360 if block == nil { 361 return nil, fmt.Errorf("block #%x not found", hash) 362 } 363 return api.traceBlock(ctx, block, config) 364 } 365 366 // TraceBlock returns the structured logs created during the execution of EVM 367 // and returns them as a JSON object. 368 func (api *PrivateDebugAPI) TraceBlock(ctx context.Context, blob []byte, config *TraceConfig) ([]*txTraceResult, error) { 369 block := new(types.Block) 370 if err := rlp.Decode(bytes.NewReader(blob), block); err != nil { 371 return nil, fmt.Errorf("could not decode block: %v", err) 372 } 373 return api.traceBlock(ctx, block, config) 374 } 375 376 // TraceBlockFromFile returns the structured logs created during the execution of 377 // EVM and returns them as a JSON object. 378 func (api *PrivateDebugAPI) TraceBlockFromFile(ctx context.Context, file string, config *TraceConfig) ([]*txTraceResult, error) { 379 blob, err := ioutil.ReadFile(file) 380 if err != nil { 381 return nil, fmt.Errorf("could not read file: %v", err) 382 } 383 return api.TraceBlock(ctx, blob, config) 384 } 385 386 // traceBlock configures a new tracer according to the provided configuration, and 387 // executes all the transactions contained within. The return value will be one item 388 // per transaction, dependent on the requestd tracer. 389 func (api *PrivateDebugAPI) traceBlock(ctx context.Context, block *types.Block, config *TraceConfig) ([]*txTraceResult, error) { 390 // Create the parent state database 391 if err := api.eth.engine.VerifyHeader(api.eth.blockchain, block.Header(), true); err != nil { 392 return nil, err 393 } 394 parent := api.eth.blockchain.GetBlock(block.ParentHash(), block.NumberU64()-1) 395 if parent == nil { 396 return nil, fmt.Errorf("parent %x not found", block.ParentHash()) 397 } 398 reexec := defaultTraceReexec 399 if config != nil && config.Reexec != nil { 400 reexec = *config.Reexec 401 } 402 statedb, err := api.computeStateDB(parent, reexec) 403 if err != nil { 404 return nil, err 405 } 406 // Execute all the transaction contained within the block concurrently 407 var ( 408 signer = types.MakeSigner(api.config, block.Number()) 409 410 txs = block.Transactions() 411 results = make([]*txTraceResult, len(txs)) 412 413 pend = new(sync.WaitGroup) 414 jobs = make(chan *txTraceTask, len(txs)) 415 ) 416 threads := runtime.NumCPU() 417 if threads > len(txs) { 418 threads = len(txs) 419 } 420 for th := 0; th < threads; th++ { 421 pend.Add(1) 422 go func() { 423 defer pend.Done() 424 425 // Fetch and execute the next transaction trace tasks 426 for task := range jobs { 427 msg, _ := txs[task.index].AsMessage(signer) 428 vmctx := core.NewEVMContext(msg, block.Header(), api.eth.blockchain, nil) 429 430 res, err := api.traceTx(ctx, msg, vmctx, task.statedb, config) 431 if err != nil { 432 results[task.index] = &txTraceResult{Error: err.Error()} 433 continue 434 } 435 results[task.index] = &txTraceResult{Result: res} 436 } 437 }() 438 } 439 // Feed the transactions into the tracers and return 440 var failed error 441 for i, tx := range txs { 442 // Send the trace task over for execution 443 jobs <- &txTraceTask{statedb: statedb.Copy(), index: i} 444 445 // Generate the next state snapshot fast without tracing 446 msg, _ := tx.AsMessage(signer) 447 vmctx := core.NewEVMContext(msg, block.Header(), api.eth.blockchain, nil) 448 449 vmenv := vm.NewEVM(vmctx, statedb, api.config, vm.Config{}) 450 if _, _, _, err := core.ApplyMessage(vmenv, msg, new(core.GasPool).AddGas(msg.Gas())); err != nil { 451 failed = err 452 break 453 } 454 // Finalize the state so any modifications are written to the trie 455 statedb.Finalise(true) 456 } 457 close(jobs) 458 pend.Wait() 459 460 // If execution failed in between, abort 461 if failed != nil { 462 return nil, failed 463 } 464 return results, nil 465 } 466 467 // computeStateDB retrieves the state database associated with a certain block. 468 // If no state is locally available for the given block, a number of blocks are 469 // attempted to be reexecuted to generate the desired state. 470 func (api *PrivateDebugAPI) computeStateDB(block *types.Block, reexec uint64) (*state.StateDB, error) { 471 // If we have the state fully available, use that 472 statedb, err := api.eth.blockchain.StateAt(block.Root()) 473 if err == nil { 474 return statedb, nil 475 } 476 // Otherwise try to reexec blocks until we find a state or reach our limit 477 origin := block.NumberU64() 478 database := state.NewDatabase(api.eth.ChainDb()) 479 480 for i := uint64(0); i < reexec; i++ { 481 block = api.eth.blockchain.GetBlock(block.ParentHash(), block.NumberU64()-1) 482 if block == nil { 483 break 484 } 485 if statedb, err = state.New(block.Root(), database); err == nil { 486 break 487 } 488 } 489 if err != nil { 490 switch err.(type) { 491 case *trie.MissingNodeError: 492 return nil, errors.New("required historical state unavailable") 493 default: 494 return nil, err 495 } 496 } 497 // State was available at historical point, regenerate 498 var ( 499 start = time.Now() 500 logged time.Time 501 proot common.Hash 502 ) 503 for block.NumberU64() < origin { 504 // Print progress logs if long enough time elapsed 505 if time.Since(logged) > 8*time.Second { 506 log.Info("Regenerating historical state", "block", block.NumberU64()+1, "target", origin, "elapsed", time.Since(start)) 507 logged = time.Now() 508 } 509 // Retrieve the next block to regenerate and process it 510 if block = api.eth.blockchain.GetBlockByNumber(block.NumberU64() + 1); block == nil { 511 return nil, fmt.Errorf("block #%d not found", block.NumberU64()+1) 512 } 513 _, _, _, err := api.eth.blockchain.Processor().Process(block, statedb, vm.Config{}) 514 if err != nil { 515 return nil, err 516 } 517 // Finalize the state so any modifications are written to the trie 518 root, err := statedb.Commit(true) 519 if err != nil { 520 return nil, err 521 } 522 if err := statedb.Reset(root); err != nil { 523 return nil, err 524 } 525 database.TrieDB().Reference(root, common.Hash{}) 526 database.TrieDB().Dereference(proot, common.Hash{}) 527 proot = root 528 } 529 log.Info("Historical state regenerated", "block", block.NumberU64(), "elapsed", time.Since(start), "size", database.TrieDB().Size()) 530 return statedb, nil 531 } 532 533 // TraceTransaction returns the structured logs created during the execution of EVM 534 // and returns them as a JSON object. 535 func (api *PrivateDebugAPI) TraceTransaction(ctx context.Context, hash common.Hash, config *TraceConfig) (interface{}, error) { 536 // Retrieve the transaction and assemble its EVM context 537 tx, blockHash, _, index := rawdb.ReadTransaction(api.eth.ChainDb(), hash) 538 if tx == nil { 539 return nil, fmt.Errorf("transaction %x not found", hash) 540 } 541 reexec := defaultTraceReexec 542 if config != nil && config.Reexec != nil { 543 reexec = *config.Reexec 544 } 545 msg, vmctx, statedb, err := api.computeTxEnv(blockHash, int(index), reexec) 546 if err != nil { 547 return nil, err 548 } 549 // Trace the transaction and return 550 return api.traceTx(ctx, msg, vmctx, statedb, config) 551 } 552 553 // traceTx configures a new tracer according to the provided configuration, and 554 // executes the given message in the provided environment. The return value will 555 // be tracer dependent. 556 func (api *PrivateDebugAPI) traceTx(ctx context.Context, message core.Message, vmctx vm.Context, statedb *state.StateDB, config *TraceConfig) (interface{}, error) { 557 // Assemble the structured logger or the JavaScript tracer 558 var ( 559 tracer vm.Tracer 560 err error 561 ) 562 switch { 563 case config != nil && config.Tracer != nil: 564 // Define a meaningful timeout of a single transaction trace 565 timeout := defaultTraceTimeout 566 if config.Timeout != nil { 567 if timeout, err = time.ParseDuration(*config.Timeout); err != nil { 568 return nil, err 569 } 570 } 571 // Constuct the JavaScript tracer to execute with 572 if tracer, err = tracers.New(*config.Tracer); err != nil { 573 return nil, err 574 } 575 // Handle timeouts and RPC cancellations 576 deadlineCtx, cancel := context.WithTimeout(ctx, timeout) 577 go func() { 578 <-deadlineCtx.Done() 579 tracer.(*tracers.Tracer).Stop(errors.New("execution timeout")) 580 }() 581 defer cancel() 582 583 case config == nil: 584 tracer = vm.NewStructLogger(nil) 585 586 default: 587 tracer = vm.NewStructLogger(config.LogConfig) 588 } 589 // Run the transaction with tracing enabled. 590 vmenv := vm.NewEVM(vmctx, statedb, api.config, vm.Config{Debug: true, Tracer: tracer}) 591 592 ret, gas, failed, err := core.ApplyMessage(vmenv, message, new(core.GasPool).AddGas(message.Gas())) 593 if err != nil { 594 return nil, fmt.Errorf("tracing failed: %v", err) 595 } 596 // Depending on the tracer type, format and return the output 597 switch tracer := tracer.(type) { 598 case *vm.StructLogger: 599 return ðapi.ExecutionResult{ 600 Gas: gas, 601 Failed: failed, 602 ReturnValue: fmt.Sprintf("%x", ret), 603 StructLogs: ethapi.FormatLogs(tracer.StructLogs()), 604 }, nil 605 606 case *tracers.Tracer: 607 return tracer.GetResult() 608 609 default: 610 panic(fmt.Sprintf("bad tracer type %T", tracer)) 611 } 612 } 613 614 // computeTxEnv returns the execution environment of a certain transaction. 615 func (api *PrivateDebugAPI) computeTxEnv(blockHash common.Hash, txIndex int, reexec uint64) (core.Message, vm.Context, *state.StateDB, error) { 616 // Create the parent state database 617 block := api.eth.blockchain.GetBlockByHash(blockHash) 618 if block == nil { 619 return nil, vm.Context{}, nil, fmt.Errorf("block %x not found", blockHash) 620 } 621 parent := api.eth.blockchain.GetBlock(block.ParentHash(), block.NumberU64()-1) 622 if parent == nil { 623 return nil, vm.Context{}, nil, fmt.Errorf("parent %x not found", block.ParentHash()) 624 } 625 statedb, err := api.computeStateDB(parent, reexec) 626 if err != nil { 627 return nil, vm.Context{}, nil, err 628 } 629 // Recompute transactions up to the target index. 630 signer := types.MakeSigner(api.config, block.Number()) 631 632 for idx, tx := range block.Transactions() { 633 // Assemble the transaction call message and return if the requested offset 634 msg, _ := tx.AsMessage(signer) 635 context := core.NewEVMContext(msg, block.Header(), api.eth.blockchain, nil) 636 if idx == txIndex { 637 return msg, context, statedb, nil 638 } 639 // Not yet the searched for transaction, execute on top of the current state 640 vmenv := vm.NewEVM(context, statedb, api.config, vm.Config{}) 641 if _, _, _, err := core.ApplyMessage(vmenv, msg, new(core.GasPool).AddGas(tx.Gas())); err != nil { 642 return nil, vm.Context{}, nil, fmt.Errorf("tx %x failed: %v", tx.Hash(), err) 643 } 644 // Ensure any modifications are committed to the state 645 statedb.Finalise(true) 646 } 647 return nil, vm.Context{}, nil, fmt.Errorf("tx index %d out of range for block %x", txIndex, blockHash) 648 }