diff --git a/eth/tracers/api.go b/eth/tracers/api.go index 300d904a9..7c0028601 100644 --- a/eth/tracers/api.go +++ b/eth/tracers/api.go @@ -164,6 +164,7 @@ type TraceCallConfig struct { TraceConfig StateOverrides *ethapi.StateOverride BlockOverrides *ethapi.BlockOverrides + TxIndex *hexutil.Uint } // StdTraceConfig holds extra parameters to standard-json trace functions. @@ -863,11 +864,17 @@ func (api *API) TraceTransaction(ctx context.Context, hash common.Hash, config * // TraceCall lets you trace a given eth_call. It collects the structured logs // created during the execution of EVM if the given transaction was added on // top of the provided block and returns them as a JSON object. +// If no transaction index is specified, the trace will be conducted on the state +// after executing the specified block. However, if a transaction index is provided, +// the trace will be conducted on the state after executing the specified transaction +// within the specified block. func (api *API) TraceCall(ctx context.Context, args ethapi.TransactionArgs, blockNrOrHash rpc.BlockNumberOrHash, config *TraceCallConfig) (interface{}, error) { // Try to retrieve the specified block var ( - err error - block *types.Block + err error + block *types.Block + statedb *state.StateDB + release StateReleaseFunc ) if hash, ok := blockNrOrHash.Hash(); ok { block, err = api.blockByHash(ctx, hash) @@ -892,7 +899,12 @@ func (api *API) TraceCall(ctx context.Context, args ethapi.TransactionArgs, bloc if config != nil && config.Reexec != nil { reexec = *config.Reexec } - statedb, release, err := api.backend.StateAtBlock(ctx, block, reexec, nil, true, false) + + if config != nil && config.TxIndex != nil { + _, _, statedb, release, err = api.backend.StateAtTransaction(ctx, block, int(*config.TxIndex), reexec) + } else { + statedb, release, err = api.backend.StateAtBlock(ctx, block, reexec, nil, true, false) + } if err != nil { return nil, err } diff --git a/eth/tracers/api_test.go b/eth/tracers/api_test.go index 0f78af9a0..49c3ebb67 100644 --- a/eth/tracers/api_test.go +++ b/eth/tracers/api_test.go @@ -200,13 +200,51 @@ func TestTraceCall(t *testing.T) { } genBlocks := 10 signer := types.HomesteadSigner{} + nonce := uint64(0) backend := newTestBackend(t, genBlocks, genesis, func(i int, b *core.BlockGen) { // Transfer from account[0] to account[1] // value: 1000 wei // fee: 0 wei - tx, _ := types.SignTx(types.NewTransaction(uint64(i), accounts[1].addr, big.NewInt(1000), params.TxGas, b.BaseFee(), nil), signer, accounts[0].key) + tx, _ := types.SignTx(types.NewTx(&types.LegacyTx{ + Nonce: nonce, + To: &accounts[1].addr, + Value: big.NewInt(1000), + Gas: params.TxGas, + GasPrice: b.BaseFee(), + Data: nil}), + signer, accounts[0].key) b.AddTx(tx) + nonce++ + + if i == genBlocks-2 { + // Transfer from account[0] to account[2] + tx, _ = types.SignTx(types.NewTx(&types.LegacyTx{ + Nonce: nonce, + To: &accounts[2].addr, + Value: big.NewInt(1000), + Gas: params.TxGas, + GasPrice: b.BaseFee(), + Data: nil}), + signer, accounts[0].key) + b.AddTx(tx) + nonce++ + + // Transfer from account[0] to account[1] again + tx, _ = types.SignTx(types.NewTx(&types.LegacyTx{ + Nonce: nonce, + To: &accounts[1].addr, + Value: big.NewInt(1000), + Gas: params.TxGas, + GasPrice: b.BaseFee(), + Data: nil}), + signer, accounts[0].key) + b.AddTx(tx) + nonce++ + } }) + + uintPtr := func(i int) *hexutil.Uint { x := hexutil.Uint(i); return &x } + defer backend.teardown() api := NewAPI(backend) var testSuite = []struct { @@ -240,6 +278,51 @@ func TestTraceCall(t *testing.T) { expectErr: nil, expect: `{"gas":21000,"failed":false,"returnValue":"","structLogs":[]}`, }, + // Upon the last state, default to the post block's state + { + blockNumber: rpc.BlockNumber(genBlocks - 1), + call: ethapi.TransactionArgs{ + From: &accounts[2].addr, + To: &accounts[0].addr, + Value: (*hexutil.Big)(new(big.Int).Add(big.NewInt(params.Ether), big.NewInt(100))), + }, + config: nil, + expect: `{"gas":21000,"failed":false,"returnValue":"","structLogs":[]}`, + }, + // Before the first transaction, should be failed + { + blockNumber: rpc.BlockNumber(genBlocks - 1), + call: ethapi.TransactionArgs{ + From: &accounts[2].addr, + To: &accounts[0].addr, + Value: (*hexutil.Big)(new(big.Int).Add(big.NewInt(params.Ether), big.NewInt(100))), + }, + config: &TraceCallConfig{TxIndex: uintPtr(0)}, + expectErr: fmt.Errorf("tracing failed: insufficient funds for gas * price + value: address %s have 1000000000000000000 want 1000000000000000100", accounts[2].addr), + }, + // Before the target transaction, should be failed + { + blockNumber: rpc.BlockNumber(genBlocks - 1), + call: ethapi.TransactionArgs{ + From: &accounts[2].addr, + To: &accounts[0].addr, + Value: (*hexutil.Big)(new(big.Int).Add(big.NewInt(params.Ether), big.NewInt(100))), + }, + config: &TraceCallConfig{TxIndex: uintPtr(1)}, + expectErr: fmt.Errorf("tracing failed: insufficient funds for gas * price + value: address %s have 1000000000000000000 want 1000000000000000100", accounts[2].addr), + }, + // After the target transaction, should be succeed + { + blockNumber: rpc.BlockNumber(genBlocks - 1), + call: ethapi.TransactionArgs{ + From: &accounts[2].addr, + To: &accounts[0].addr, + Value: (*hexutil.Big)(new(big.Int).Add(big.NewInt(params.Ether), big.NewInt(100))), + }, + config: &TraceCallConfig{TxIndex: uintPtr(2)}, + expectErr: nil, + expect: `{"gas":21000,"failed":false,"returnValue":"","structLogs":[]}`, + }, // Standard JSON trace upon the non-existent block, error expects { blockNumber: rpc.BlockNumber(genBlocks + 1), @@ -297,8 +380,8 @@ func TestTraceCall(t *testing.T) { t.Errorf("test %d: expect error %v, got nothing", i, testspec.expectErr) continue } - if !reflect.DeepEqual(err, testspec.expectErr) { - t.Errorf("test %d: error mismatch, want %v, git %v", i, testspec.expectErr, err) + if !reflect.DeepEqual(err.Error(), testspec.expectErr.Error()) { + t.Errorf("test %d: error mismatch, want '%v', got '%v'", i, testspec.expectErr, err) } } else { if err != nil { @@ -338,7 +421,14 @@ func TestTraceTransaction(t *testing.T) { // Transfer from account[0] to account[1] // value: 1000 wei // fee: 0 wei - tx, _ := types.SignTx(types.NewTransaction(uint64(i), accounts[1].addr, big.NewInt(1000), params.TxGas, b.BaseFee(), nil), signer, accounts[0].key) + tx, _ := types.SignTx(types.NewTx(&types.LegacyTx{ + Nonce: uint64(i), + To: &accounts[1].addr, + Value: big.NewInt(1000), + Gas: params.TxGas, + GasPrice: b.BaseFee(), + Data: nil}), + signer, accounts[0].key) b.AddTx(tx) target = tx.Hash() }) @@ -388,7 +478,14 @@ func TestTraceBlock(t *testing.T) { // Transfer from account[0] to account[1] // value: 1000 wei // fee: 0 wei - tx, _ := types.SignTx(types.NewTransaction(uint64(i), accounts[1].addr, big.NewInt(1000), params.TxGas, b.BaseFee(), nil), signer, accounts[0].key) + tx, _ := types.SignTx(types.NewTx(&types.LegacyTx{ + Nonce: uint64(i), + To: &accounts[1].addr, + Value: big.NewInt(1000), + Gas: params.TxGas, + GasPrice: b.BaseFee(), + Data: nil}), + signer, accounts[0].key) b.AddTx(tx) txHash = tx.Hash() }) @@ -478,7 +575,14 @@ func TestTracingWithOverrides(t *testing.T) { // Transfer from account[0] to account[1] // value: 1000 wei // fee: 0 wei - tx, _ := types.SignTx(types.NewTransaction(uint64(i), accounts[1].addr, big.NewInt(1000), params.TxGas, b.BaseFee(), nil), signer, accounts[0].key) + tx, _ := types.SignTx(types.NewTx(&types.LegacyTx{ + Nonce: uint64(i), + To: &accounts[1].addr, + Value: big.NewInt(1000), + Gas: params.TxGas, + GasPrice: b.BaseFee(), + Data: nil}), + signer, accounts[0].key) b.AddTx(tx) }) defer backend.chain.Stop()