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eth/tracers: add native flatCallTracer (aka parity style tracer) (#26377)

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Adds support for a native call tracer with the Parity format, which outputs call frames
in a flat array. This tracer accepts the following options:

- `convertParityErrors: true` will convert error messages to match those of Parity
- `includePrecompiles: true` will report all calls to precompiles. The default
  matches Parity's behavior where CALL and STATICCALLs to precompiles are excluded

Incompatibilities with Parity include:

- Parity removes the result object in case of failure. This behavior is maintained
  with the exception of reverts. Revert output usually contains useful information,
  i.e. Solidity revert reason.
- The `gasUsed` field accounts for intrinsic gas (e.g. 21000 for simple transfers)
  and refunds unlike Parity
- Block rewards are not reported

Co-authored-by: Sina Mahmoodi <itz.s1na@gmail.com>
This commit is contained in:
Chris Ziogas 2023-02-28 12:24:37 +02:00 committed by GitHub
parent c155c8e179
commit 2ad150d986
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
37 changed files with 4870 additions and 15 deletions
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28
eth/tracers/api.go
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@ -295,9 +295,10 @@ func (api *API) traceChain(start, end *types.Block, config *TraceConfig, closed
for i, tx := range task.block.Transactions() { for i, tx := range task.block.Transactions() {
msg, _ := tx.AsMessage(signer, task.block.BaseFee()) msg, _ := tx.AsMessage(signer, task.block.BaseFee())
txctx := &Context{ txctx := &Context{
BlockHash: task.block.Hash(), BlockHash: task.block.Hash(),
TxIndex: i, BlockNumber: task.block.Number(),
TxHash: tx.Hash(), TxIndex: i,
TxHash: tx.Hash(),
} }
res, err := api.traceTx(ctx, msg, txctx, blockCtx, task.statedb, config) res, err := api.traceTx(ctx, msg, txctx, blockCtx, task.statedb, config)
if err != nil { if err != nil {
@ -629,9 +630,10 @@ func (api *API) traceBlock(ctx context.Context, block *types.Block, config *Trac
// Generate the next state snapshot fast without tracing // Generate the next state snapshot fast without tracing
msg, _ := tx.AsMessage(signer, block.BaseFee()) msg, _ := tx.AsMessage(signer, block.BaseFee())
txctx := &Context{ txctx := &Context{
BlockHash: blockHash, BlockHash: blockHash,
TxIndex: i, BlockNumber: block.Number(),
TxHash: tx.Hash(), TxIndex: i,
TxHash: tx.Hash(),
} }
res, err := api.traceTx(ctx, msg, txctx, blockCtx, statedb, config) res, err := api.traceTx(ctx, msg, txctx, blockCtx, statedb, config)
if err != nil { if err != nil {
@ -671,9 +673,10 @@ func (api *API) traceBlockParallel(ctx context.Context, block *types.Block, stat
for task := range jobs { for task := range jobs {
msg, _ := txs[task.index].AsMessage(signer, block.BaseFee()) msg, _ := txs[task.index].AsMessage(signer, block.BaseFee())
txctx := &Context{ txctx := &Context{
BlockHash: blockHash, BlockHash: blockHash,
TxIndex: task.index, BlockNumber: block.Number(),
TxHash: txs[task.index].Hash(), TxIndex: task.index,
TxHash: txs[task.index].Hash(),
} }
res, err := api.traceTx(ctx, msg, txctx, blockCtx, task.statedb, config) res, err := api.traceTx(ctx, msg, txctx, blockCtx, task.statedb, config)
if err != nil { if err != nil {
@ -874,9 +877,10 @@ func (api *API) TraceTransaction(ctx context.Context, hash common.Hash, config *
defer release() defer release()
txctx := &Context{ txctx := &Context{
BlockHash: blockHash, BlockHash: blockHash,
TxIndex: int(index), BlockNumber: block.Number(),
TxHash: hash, TxIndex: int(index),
TxHash: hash,
} }
return api.traceTx(ctx, msg, txctx, vmctx, statedb, config) return api.traceTx(ctx, msg, txctx, vmctx, statedb, config)
} }

213
eth/tracers/internal/tracetest/flat_calltrace_test.go Normal file
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@ -0,0 +1,213 @@
package tracetest
import (
"encoding/json"
"fmt"
"math/big"
"os"
"path/filepath"
"reflect"
"strings"
"testing"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/common/hexutil"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/core/rawdb"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/core/vm"
"github.com/ethereum/go-ethereum/rlp"
"github.com/ethereum/go-ethereum/tests"
// Force-load the native, to trigger registration
"github.com/ethereum/go-ethereum/eth/tracers"
)
// flatCallTrace is the result of a callTracerParity run.
type flatCallTrace struct {
Action flatCallTraceAction `json:"action"`
BlockHash common.Hash `json:"-"`
BlockNumber uint64 `json:"-"`
Error string `json:"error,omitempty"`
Result flatCallTraceResult `json:"result,omitempty"`
Subtraces int `json:"subtraces"`
TraceAddress []int `json:"traceAddress"`
TransactionHash common.Hash `json:"-"`
TransactionPosition uint64 `json:"-"`
Type string `json:"type"`
Time string `json:"-"`
}
type flatCallTraceAction struct {
Author common.Address `json:"author,omitempty"`
RewardType string `json:"rewardType,omitempty"`
SelfDestructed common.Address `json:"address,omitempty"`
Balance hexutil.Big `json:"balance,omitempty"`
CallType string `json:"callType,omitempty"`
CreationMethod string `json:"creationMethod,omitempty"`
From common.Address `json:"from,omitempty"`
Gas hexutil.Uint64 `json:"gas,omitempty"`
Init hexutil.Bytes `json:"init,omitempty"`
Input hexutil.Bytes `json:"input,omitempty"`
RefundAddress common.Address `json:"refundAddress,omitempty"`
To common.Address `json:"to,omitempty"`
Value hexutil.Big `json:"value,omitempty"`
}
type flatCallTraceResult struct {
Address common.Address `json:"address,omitempty"`
Code hexutil.Bytes `json:"code,omitempty"`
GasUsed hexutil.Uint64 `json:"gasUsed,omitempty"`
Output hexutil.Bytes `json:"output,omitempty"`
}
// flatCallTracerTest defines a single test to check the call tracer against.
type flatCallTracerTest struct {
Genesis core.Genesis `json:"genesis"`
Context callContext `json:"context"`
Input string `json:"input"`
TracerConfig json.RawMessage `json:"tracerConfig"`
Result []flatCallTrace `json:"result"`
}
func flatCallTracerTestRunner(tracerName string, filename string, dirPath string, t testing.TB) error {
// Call tracer test found, read if from disk
blob, err := os.ReadFile(filepath.Join("testdata", dirPath, filename))
if err != nil {
return fmt.Errorf("failed to read testcase: %v", err)
}
test := new(flatCallTracerTest)
if err := json.Unmarshal(blob, test); err != nil {
return fmt.Errorf("failed to parse testcase: %v", err)
}
// Configure a blockchain with the given prestate
tx := new(types.Transaction)
if err := rlp.DecodeBytes(common.FromHex(test.Input), tx); err != nil {
return fmt.Errorf("failed to parse testcase input: %v", err)
}
signer := types.MakeSigner(test.Genesis.Config, new(big.Int).SetUint64(uint64(test.Context.Number)))
origin, _ := signer.Sender(tx)
txContext := vm.TxContext{
Origin: origin,
GasPrice: tx.GasPrice(),
}
context := vm.BlockContext{
CanTransfer: core.CanTransfer,
Transfer: core.Transfer,
Coinbase: test.Context.Miner,
BlockNumber: new(big.Int).SetUint64(uint64(test.Context.Number)),
Time: uint64(test.Context.Time),
Difficulty: (*big.Int)(test.Context.Difficulty),
GasLimit: uint64(test.Context.GasLimit),
}
_, statedb := tests.MakePreState(rawdb.NewMemoryDatabase(), test.Genesis.Alloc, false)
// Create the tracer, the EVM environment and run it
tracer, err := tracers.DefaultDirectory.New(tracerName, new(tracers.Context), test.TracerConfig)
if err != nil {
return fmt.Errorf("failed to create call tracer: %v", err)
}
evm := vm.NewEVM(context, txContext, statedb, test.Genesis.Config, vm.Config{Debug: true, Tracer: tracer})
msg, err := tx.AsMessage(signer, nil)
if err != nil {
return fmt.Errorf("failed to prepare transaction for tracing: %v", err)
}
st := core.NewStateTransition(evm, msg, new(core.GasPool).AddGas(tx.Gas()))
if _, err = st.TransitionDb(); err != nil {
return fmt.Errorf("failed to execute transaction: %v", err)
}
// Retrieve the trace result and compare against the etalon
res, err := tracer.GetResult()
if err != nil {
return fmt.Errorf("failed to retrieve trace result: %v", err)
}
ret := new([]flatCallTrace)
if err := json.Unmarshal(res, ret); err != nil {
return fmt.Errorf("failed to unmarshal trace result: %v", err)
}
if !jsonEqualFlat(ret, test.Result) {
t.Logf("tracer name: %s", tracerName)
// uncomment this for easier debugging
// have, _ := json.MarshalIndent(ret, "", " ")
// want, _ := json.MarshalIndent(test.Result, "", " ")
// t.Logf("trace mismatch: \nhave %+v\nwant %+v", string(have), string(want))
// uncomment this for harder debugging <3 meowsbits
// lines := deep.Equal(ret, test.Result)
// for _, l := range lines {
// t.Logf("%s", l)
// t.FailNow()
// }
t.Fatalf("trace mismatch: \nhave %+v\nwant %+v", ret, test.Result)
}
return nil
}
// Iterates over all the input-output datasets in the tracer parity test harness and
// runs the Native tracer against them.
func TestFlatCallTracerNative(t *testing.T) {
testFlatCallTracer("flatCallTracer", "call_tracer_flat", t)
}
func testFlatCallTracer(tracerName string, dirPath string, t *testing.T) {
files, err := os.ReadDir(filepath.Join("testdata", dirPath))
if err != nil {
t.Fatalf("failed to retrieve tracer test suite: %v", err)
}
for _, file := range files {
if !strings.HasSuffix(file.Name(), ".json") {
continue
}
file := file // capture range variable
t.Run(camel(strings.TrimSuffix(file.Name(), ".json")), func(t *testing.T) {
t.Parallel()
err := flatCallTracerTestRunner(tracerName, file.Name(), dirPath, t)
if err != nil {
t.Fatal(err)
}
})
}
}
// jsonEqual is similar to reflect.DeepEqual, but does a 'bounce' via json prior to
// comparison
func jsonEqualFlat(x, y interface{}) bool {
xTrace := new([]flatCallTrace)
yTrace := new([]flatCallTrace)
if xj, err := json.Marshal(x); err == nil {
json.Unmarshal(xj, xTrace)
} else {
return false
}
if yj, err := json.Marshal(y); err == nil {
json.Unmarshal(yj, yTrace)
} else {
return false
}
return reflect.DeepEqual(xTrace, yTrace)
}
func BenchmarkFlatCallTracer(b *testing.B) {
files, err := filepath.Glob("testdata/call_tracer_flat/*.json")
if err != nil {
b.Fatalf("failed to read testdata: %v", err)
}
for _, file := range files {
filename := strings.TrimPrefix(file, "testdata/call_tracer_flat/")
b.Run(camel(strings.TrimSuffix(filename, ".json")), func(b *testing.B) {
for n := 0; n < b.N; n++ {
err := flatCallTracerTestRunner("flatCallTracer", filename, "call_tracer_flat", b)
if err != nil {
b.Fatal(err)
}
}
})
}
}

64
eth/tracers/internal/tracetest/testdata/call_tracer_flat/big_slow.json vendored Normal file
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@ -0,0 +1,64 @@
{
"genesis": {
"difficulty": "50486697699375",
"extraData": "0xd783010406844765746887676f312e362e32856c696e7578",
"gasLimit": "4788482",
"hash": "0xf6bbc5bbe34d5c93fd5b4712cd498d1026b8b0f586efefe7fe30231ed6b8a1a5",
"miner": "0xbcdfc35b86bedf72f0cda046a3c16829a2ef41d1",
"mixHash": "0xabca93555584c0463ee5c212251dd002bb3a93a157e06614276f93de53d4fdb8",
"nonce": "0xa64136fcb9c2d4ca",
"number": "1719576",
"stateRoot": "0xab5eec2177a92d633e282936af66c46e24cfa8f2fdc2b8155f33885f483d06f3",
"timestamp": "1466150166",
"totalDifficulty": "28295412423546970038",
"alloc": {
"0xf8bda96b67036ee48107f2a0695ea673479dda56": {
"balance": "0x1529e844f9ecdeec",
"nonce": "33",
"code": "0x",
"storage": {}
}
},
"config": {
"chainId": 1,
"daoForkSupport": true,
"eip150Block": 0,
"eip150Hash": "0x41941023680923e0fe4d74a34bdac8141f2540e3ae90623718e47d66d1ca4a2d",
"eip155Block": 3000000,
"eip158Block": 0,
"ethash": {},
"homesteadBlock": 1150000,
"byzantiumBlock": 8772000,
"constantinopleBlock": 9573000,
"petersburgBlock": 10500839,
"istanbulBlock": 10500839
}
},
"context": {
"number": "1719577",
"difficulty": "50486697732143",
"timestamp": "1466150178",
"gasLimit": "4788484",
"miner": "0x2a65aca4d5fc5b5c859090a6c34d164135398226"
},
"input": "0xf874218504a817c800832318608080a35b620186a05a131560135760016020526000565b600080601f600039601f565b6000f31ba0575fa000a1f06659a7b6d3c7877601519a4997f04293f0dfa0eee6d8cd840c77a04c52ce50719ee2ff7a0c5753f4ee69c0340666f582dbb5148845a354ca726e4a",
"result": [
{
"action": {
"from": "0xf8bda96b67036ee48107f2a0695ea673479dda56",
"gas": "0x22410c",
"init": "0x5b620186a05a131560135760016020526000565b600080601f600039601f565b6000f3",
"value": "0x0"
},
"blockNumber": 1719577,
"result": {
"address": "0xb2e6a2546c45889427757171ab05b8b438525b42",
"code": "0x",
"gasUsed": "0x219202"
},
"subtraces": 0,
"traceAddress": [],
"type": "create"
}
]
}

74
eth/tracers/internal/tracetest/testdata/call_tracer_flat/callcode_precompiled_fail_hide.json vendored Normal file
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@ -0,0 +1,74 @@
{
"genesis": {
"difficulty": "4671584",
"extraData": "0xd683010b05846765746886676f312e3133856c696e7578",
"gasLimit": "9435026",
"hash": "0x755bd54de4b2f5a7a589a10d69888b4ead48a6311d5d69f2f69ca85ec35fbe0b",
"miner": "0x877bd459c9b7d8576b44e59e09d076c25946f443",
"mixHash": "0x3a44525624571c31344ba57780f7664098fe7cbeafe532bcdee76a23fc474ba0",
"nonce": "0x6dca647c00c72bbf",
"number": "1555278",
"stateRoot": "0x5f56d8323ee384b0c8d1de49d63e150e17283eea813483698362bc0ec9e0242a",
"timestamp": "1590795319",
"totalDifficulty": "2242614315030",
"alloc": {
"0x0000000000000000000000000000000000000004": {
"balance": "0x0",
"nonce": "0",
"code": "0x",
"storage": {}
},
"0x877bd459c9b7d8576b44e59e09d076c25946f443": {
"balance": "0x62436e941792f02a5fb1",
"nonce": "265356",
"code": "0x",
"storage": {}
}
},
"config": {
"chainId": 63,
"daoForkSupport": true,
"eip150Block": 0,
"eip150Hash": "0x41941023680923e0fe4d74a34bdac8141f2540e3ae90623718e47d66d1ca4a2d",
"eip155Block": 0,
"eip158Block": 0,
"ethash": {},
"homesteadBlock": 0,
"byzantiumBlock": 0,
"constantinopleBlock": 301243,
"petersburgBlock": 999983,
"istanbulBlock": 999983
}
},
"context": {
"number": "1555279",
"difficulty": "4669303",
"timestamp": "1590795340",
"gasLimit": "9444238",
"miner": "0x877bd459c9b7d8576b44e59e09d076c25946f443"
},
"input": "0xf86f83040c8c843b9aca0083019f7880809b60206000600060006013600462030d40f26002556000516000550081a2a086ad228c89ad9664287b12a5602a635a803506904f4ce39795990ac4f945cd57a025b30ea8042d773f6c5b13d7cc1b3979f9f10ee674410b6a2112ce840d0302dc",
"result": [
{
"type": "create",
"action": {
"from": "0x877bd459c9b7d8576b44e59e09d076c25946f443",
"value": "0x0",
"gas": "0xcf08",
"init": "0x60206000600060006013600462030d40f260025560005160005500"
},
"result": {
"gasUsed": "0xf3bc",
"code": "0x",
"address": "0x5f8a7e007172ba80afbff1b15f800eb0b260f224"
},
"traceAddress": [],
"subtraces": 0,
"transactionPosition": 74,
"transactionHash": "0x5ef60b27ac971c22a7d484e546e50093ca62300c8986d165154e47773764b6a4",
"blockNumber": 1555279,
"blockHash": "0xd6c98d1b87dfa92a210d99bad2873adaf0c9e51fe43addc63fd9cca03a5c6f46",
"time": "209.346µs"
}
]
}

94
eth/tracers/internal/tracetest/testdata/call_tracer_flat/callcode_precompiled_oog.json vendored Normal file
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@ -0,0 +1,94 @@
{
"genesis": {
"difficulty": "4671584",
"extraData": "0xd883010b05846765746888676f312e31342e33856c696e7578",
"gasLimit": "9425823",
"hash": "0x27dd7d052dbc8a29cc5b9487e1e41d842e7a643fcaea4964caa22b834964acaf",
"miner": "0x73f26d124436b0791169d63a3af29c2ae47765a3",
"mixHash": "0xb4a050624f5d147fdf02857cbfd55da3ddc1451743acc5c163861584589c3034",
"nonce": "0x3c255875b17e0573",
"number": "1555277",
"stateRoot": "0x6290d79215a2eebc25d5e456b35876c6d78ffc1ea47bdd70e375ebb3cf325620",
"timestamp": "1590795308",
"totalDifficulty": "2242609643446",
"alloc": {
"0x0000000000000000000000000000000000000001": {
"balance": "0x0",
"nonce": "0",
"code": "0x",
"storage": {}
},
"0x877bd459c9b7d8576b44e59e09d076c25946f443": {
"balance": "0x624329308610ab365fb1",
"nonce": "265194",
"code": "0x",
"storage": {}
}
},
"config": {
"chainId": 63,
"daoForkSupport": true,
"eip150Block": 0,
"eip150Hash": "0x41941023680923e0fe4d74a34bdac8141f2540e3ae90623718e47d66d1ca4a2d",
"eip155Block": 0,
"eip158Block": 0,
"ethash": {},
"homesteadBlock": 0,
"byzantiumBlock": 0,
"constantinopleBlock": 301243,
"petersburgBlock": 999983,
"istanbulBlock": 999983
}
},
"context": {
"number": "1555278",
"difficulty": "4671584",
"timestamp": "1590795319",
"gasLimit": "9435026",
"miner": "0x877bd459c9b7d8576b44e59e09d076c25946f443"
},
"input": "0xf8ee83040bea843b9aca008301a7588080b8997f18c547e4f7b0f325ad1e56f57e26c745b09a3e503d86e00e5255ff7f715d3d1c600052601c6020527f73b1693892219d736caba55bdb67216e485557ea6b6af75f37096c9aa6a5a75f6040527feeb940b1d03b21e36b0e47e79769f095fe2ab855bd91e3a38756b7d75a9c4549606052602060806080600060006001610bb7f260025560a060020a6080510660005560005432146001550081a1a05b9a162d84bfe84faa7c176e21c26c0083645d4dd0d566547b7be2c2da0b4259a05b37ff12a4c27634cb0da6008d9b69726d415ff4694f9bc38c7806eb1fb60ae9",
"result": [
{
"type": "create",
"action": {
"from": "0x877bd459c9b7d8576b44e59e09d076c25946f443",
"value": "0x0",
"gas": "0xcf08",
"init": "0x7f18c547e4f7b0f325ad1e56f57e26c745b09a3e503d86e00e5255ff7f715d3d1c600052601c6020527f73b1693892219d736caba55bdb67216e485557ea6b6af75f37096c9aa6a5a75f6040527feeb940b1d03b21e36b0e47e79769f095fe2ab855bd91e3a38756b7d75a9c4549606052602060806080600060006001610bb7f260025560a060020a60805106600055600054321460015500"
},
"result": {
"gasUsed": "0xf3e9",
"code": "0x",
"address": "0x568c19ecb14b87e4aec29b4d2d700a3ad3fd0613"
},
"traceAddress": [],
"subtraces": 1,
"transactionPosition": 141,
"transactionHash": "0x1592cbda0d928b8d18eed98857942b91ade32d088e55b8bf63418917cb0231f1",
"blockNumber": 1555278,
"blockHash": "0x755bd54de4b2f5a7a589a10d69888b4ead48a6311d5d69f2f69ca85ec35fbe0b",
"time": "300.9µs"
},
{
"type": "call",
"action": {
"from": "0x568c19ecb14b87e4aec29b4d2d700a3ad3fd0613",
"to": "0x0000000000000000000000000000000000000001",
"value": "0x0",
"gas": "0xbb7",
"input": "0x18c547e4f7b0f325ad1e56f57e26c745b09a3e503d86e00e5255ff7f715d3d1c000000000000000000000000000000000000000000000000000000000000001c73b1693892219d736caba55bdb67216e485557ea6b6af75f37096c9aa6a5a75feeb940b1d03b21e36b0e47e79769f095fe2ab855bd91e3a38756b7d75a9c4549",
"callType": "callcode"
},
"error": "out of gas",
"traceAddress": [
0
],
"subtraces": 0,
"transactionPosition": 141,
"transactionHash": "0x1592cbda0d928b8d18eed98857942b91ade32d088e55b8bf63418917cb0231f1",
"blockNumber": 1555278,
"blockHash": "0x755bd54de4b2f5a7a589a10d69888b4ead48a6311d5d69f2f69ca85ec35fbe0b"
}
]
}

90
eth/tracers/internal/tracetest/testdata/call_tracer_flat/callcode_precompiled_throw.json vendored Normal file
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@ -0,0 +1,90 @@
{
"genesis": {
"difficulty": "4683014",
"extraData": "0x537465762d63676574682d76312e31312e34",
"gasLimit": "9435044",
"hash": "0x3452ca5005cb73cd60dfa488a7b124251168e564491f80eb66765e79d78cfd95",
"miner": "0x415aa6292d1db797a467b22139704956c030e62f",
"mixHash": "0x6037612618507ae70c74a72bc2580253662971db959cfbc06d3f8527d4d01575",
"nonce": "0x314fc90dee5e39a2",
"number": "1555274",
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67
eth/tracers/internal/tracetest/testdata/call_tracer_flat/create.json vendored Normal file
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@ -0,0 +1,67 @@
{
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635
eth/tracers/internal/tracetest/testdata/call_tracer_flat/deep_calls.json vendored Normal file
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120
eth/tracers/internal/tracetest/testdata/call_tracer_flat/delegatecall.json vendored Normal file
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103
eth/tracers/internal/tracetest/testdata/call_tracer_flat/delegatecall_parent_value.json vendored Normal file
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@ -0,0 +1,103 @@
{
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95
eth/tracers/internal/tracetest/testdata/call_tracer_flat/gas.json vendored Normal file
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@ -0,0 +1,95 @@
{
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94
eth/tracers/internal/tracetest/testdata/call_tracer_flat/nested_create2_action_gas.json vendored Normal file
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90
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eth/tracers/internal/tracetest/testdata/call_tracer_flat/revert.json vendored Normal file
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74
eth/tracers/internal/tracetest/testdata/call_tracer_flat/revert_reason.json vendored Normal file
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eth/tracers/internal/tracetest/testdata/call_tracer_flat/selfdestruct.json vendored Normal file
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eth/tracers/internal/tracetest/testdata/call_tracer_flat/simple.json vendored Normal file
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83
eth/tracers/internal/tracetest/testdata/call_tracer_flat/staticcall_precompiled.json vendored Normal file
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eth/tracers/internal/tracetest/testdata/call_tracer_flat/suicide.json vendored Normal file
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"value": "0x0"
},
"blockHash": "0xf641c3b0f82b07cd3a528adb9927dd83eeb4f1682e2bd523ed36888e0d82c9a9",
"blockNumber": 553154,
"result": {
"gasUsed": "0x347a",
"output": "0x"
},
"subtraces": 1,
"traceAddress": [],
"transactionHash": "0x6af0a5c3188ffacae4d340d4a17e14fdb5a54187683a80ef241bde248189882b",
"transactionPosition": 15,
"type": "call"
},
{
"action": {
"address": "0x8ee79c5b3f6e1d214d2c4fcf7ea4092a32e26e91",
"balance": "0x0",
"refundAddress": "0x877bd459c9b7d8576b44e59e09d076c25946f443"
},
"blockHash": "0xf641c3b0f82b07cd3a528adb9927dd83eeb4f1682e2bd523ed36888e0d82c9a9",
"blockNumber": 553154,
"subtraces": 0,
"traceAddress": [
0
],
"transactionHash": "0x6af0a5c3188ffacae4d340d4a17e14fdb5a54187683a80ef241bde248189882b",
"transactionPosition": 15,
"type": "suicide"
}
]
}

70
eth/tracers/internal/tracetest/testdata/call_tracer_flat/throw.json vendored Normal file
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File diff suppressed because one or more lines are too long

1
eth/tracers/native/call.go
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@ -240,6 +240,7 @@ func (t *callTracer) GetResult() (json.RawMessage, error) {
if len(t.callstack) != 1 { if len(t.callstack) != 1 {
return nil, errors.New("incorrect number of top-level calls") return nil, errors.New("incorrect number of top-level calls")
} }
res, err := json.Marshal(t.callstack[0]) res, err := json.Marshal(t.callstack[0])
if err != nil { if err != nil {
return nil, err return nil, err

379
eth/tracers/native/call_flat.go Normal file
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@ -0,0 +1,379 @@
// Copyright 2022 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package native
import (
"encoding/json"
"errors"
"fmt"
"math/big"
"strings"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/common/hexutil"
"github.com/ethereum/go-ethereum/core/vm"
"github.com/ethereum/go-ethereum/eth/tracers"
)
//go:generate go run github.com/fjl/gencodec -type flatCallAction -field-override flatCallActionMarshaling -out gen_flatcallaction_json.go
//go:generate go run github.com/fjl/gencodec -type flatCallResult -field-override flatCallResultMarshaling -out gen_flatcallresult_json.go
func init() {
tracers.DefaultDirectory.Register("flatCallTracer", newFlatCallTracer, false)
}
var parityErrorMapping = map[string]string{
"contract creation code storage out of gas": "Out of gas",
"out of gas": "Out of gas",
"gas uint64 overflow": "Out of gas",
"max code size exceeded": "Out of gas",
"invalid jump destination": "Bad jump destination",
"execution reverted": "Reverted",
"return data out of bounds": "Out of bounds",
"stack limit reached 1024 (1023)": "Out of stack",
"precompiled failed": "Built-in failed",
"invalid input length": "Built-in failed",
}
var parityErrorMappingStartingWith = map[string]string{
"invalid opcode:": "Bad instruction",
"stack underflow": "Stack underflow",
}
// flatCallFrame is a standalone callframe.
type flatCallFrame struct {
Action flatCallAction `json:"action"`
BlockHash *common.Hash `json:"blockHash"`
BlockNumber uint64 `json:"blockNumber"`
Error string `json:"error,omitempty"`
Result *flatCallResult `json:"result,omitempty"`
Subtraces int `json:"subtraces"`
TraceAddress []int `json:"traceAddress"`
TransactionHash *common.Hash `json:"transactionHash"`
TransactionPosition uint64 `json:"transactionPosition"`
Type string `json:"type"`
}
type flatCallAction struct {
Author *common.Address `json:"author,omitempty"`
RewardType string `json:"rewardType,omitempty"`
SelfDestructed *common.Address `json:"address,omitempty"`
Balance *big.Int `json:"balance,omitempty"`
CallType string `json:"callType,omitempty"`
CreationMethod string `json:"creationMethod,omitempty"`
From *common.Address `json:"from,omitempty"`
Gas *uint64 `json:"gas,omitempty"`
Init *[]byte `json:"init,omitempty"`
Input *[]byte `json:"input,omitempty"`
RefundAddress *common.Address `json:"refundAddress,omitempty"`
To *common.Address `json:"to,omitempty"`
Value *big.Int `json:"value,omitempty"`
}
type flatCallActionMarshaling struct {
Balance *hexutil.Big
Gas *hexutil.Uint64
Init *hexutil.Bytes
Input *hexutil.Bytes
Value *hexutil.Big
}
type flatCallResult struct {
Address *common.Address `json:"address,omitempty"`
Code *[]byte `json:"code,omitempty"`
GasUsed *uint64 `json:"gasUsed,omitempty"`
Output *[]byte `json:"output,omitempty"`
}
type flatCallResultMarshaling struct {
Code *hexutil.Bytes
GasUsed *hexutil.Uint64
Output *hexutil.Bytes
}
// flatCallTracer reports call frame information of a tx in a flat format, i.e.
// as opposed to the nested format of `callTracer`.
type flatCallTracer struct {
tracer *callTracer
config flatCallTracerConfig
ctx *tracers.Context // Holds tracer context data
reason error // Textual reason for the interruption
activePrecompiles []common.Address // Updated on CaptureStart based on given rules
}
type flatCallTracerConfig struct {
ConvertParityErrors bool `json:"convertParityErrors"` // If true, call tracer converts errors to parity format
IncludePrecompiles bool `json:"includePrecompiles"` // If true, call tracer includes calls to precompiled contracts
}
// newFlatCallTracer returns a new flatCallTracer.
func newFlatCallTracer(ctx *tracers.Context, cfg json.RawMessage) (tracers.Tracer, error) {
var config flatCallTracerConfig
if cfg != nil {
if err := json.Unmarshal(cfg, &config); err != nil {
return nil, err
}
}
tracer, err := tracers.DefaultDirectory.New("callTracer", ctx, cfg)
if err != nil {
return nil, err
}
t, ok := tracer.(*callTracer)
if !ok {
return nil, errors.New("internal error: embedded tracer has wrong type")
}
return &flatCallTracer{tracer: t, ctx: ctx, config: config}, nil
}
// CaptureStart implements the EVMLogger interface to initialize the tracing operation.
func (t *flatCallTracer) CaptureStart(env *vm.EVM, from common.Address, to common.Address, create bool, input []byte, gas uint64, value *big.Int) {
t.tracer.CaptureStart(env, from, to, create, input, gas, value)
// Update list of precompiles based on current block
rules := env.ChainConfig().Rules(env.Context.BlockNumber, env.Context.Random != nil, env.Context.Time)
t.activePrecompiles = vm.ActivePrecompiles(rules)
}
// CaptureEnd is called after the call finishes to finalize the tracing.
func (t *flatCallTracer) CaptureEnd(output []byte, gasUsed uint64, err error) {
t.tracer.CaptureEnd(output, gasUsed, err)
}
// CaptureState implements the EVMLogger interface to trace a single step of VM execution.
func (t *flatCallTracer) CaptureState(pc uint64, op vm.OpCode, gas, cost uint64, scope *vm.ScopeContext, rData []byte, depth int, err error) {
t.tracer.CaptureState(pc, op, gas, cost, scope, rData, depth, err)
}
// CaptureFault implements the EVMLogger interface to trace an execution fault.
func (t *flatCallTracer) CaptureFault(pc uint64, op vm.OpCode, gas, cost uint64, scope *vm.ScopeContext, depth int, err error) {
t.tracer.CaptureFault(pc, op, gas, cost, scope, depth, err)
}
// CaptureEnter is called when EVM enters a new scope (via call, create or selfdestruct).
func (t *flatCallTracer) CaptureEnter(typ vm.OpCode, from common.Address, to common.Address, input []byte, gas uint64, value *big.Int) {
t.tracer.CaptureEnter(typ, from, to, input, gas, value)
// Child calls must have a value, even if it's zero.
// Practically speaking, only STATICCALL has nil value. Set it to zero.
if t.tracer.callstack[len(t.tracer.callstack)-1].Value == nil && value == nil {
t.tracer.callstack[len(t.tracer.callstack)-1].Value = big.NewInt(0)
}
}
// CaptureExit is called when EVM exits a scope, even if the scope didn't
// execute any code.
func (t *flatCallTracer) CaptureExit(output []byte, gasUsed uint64, err error) {
t.tracer.CaptureExit(output, gasUsed, err)
// Parity traces don't include CALL/STATICCALLs to precompiles.
// By default we remove them from the callstack.
if t.config.IncludePrecompiles {
return
}
var (
// call has been nested in parent
parent = t.tracer.callstack[len(t.tracer.callstack)-1]
call = parent.Calls[len(parent.Calls)-1]
typ = call.Type
to = call.To
)
if typ == vm.CALL || typ == vm.STATICCALL {
if t.isPrecompiled(to) {
t.tracer.callstack[len(t.tracer.callstack)-1].Calls = parent.Calls[:len(parent.Calls)-1]
}
}
}
func (t *flatCallTracer) CaptureTxStart(gasLimit uint64) {
t.tracer.CaptureTxStart(gasLimit)
}
func (t *flatCallTracer) CaptureTxEnd(restGas uint64) {
t.tracer.CaptureTxEnd(restGas)
}
// GetResult returns an empty json object.
func (t *flatCallTracer) GetResult() (json.RawMessage, error) {
if len(t.tracer.callstack) < 1 {
return nil, errors.New("invalid number of calls")
}
flat, err := flatFromNested(&t.tracer.callstack[0], []int{}, t.config.ConvertParityErrors, t.ctx)
if err != nil {
return nil, err
}
res, err := json.Marshal(flat)
if err != nil {
return nil, err
}
return res, t.reason
}
// Stop terminates execution of the tracer at the first opportune moment.
func (t *flatCallTracer) Stop(err error) {
t.tracer.Stop(err)
}
// isPrecompiled returns whether the addr is a precompile.
func (t *flatCallTracer) isPrecompiled(addr common.Address) bool {
for _, p := range t.activePrecompiles {
if p == addr {
return true
}
}
return false
}
func flatFromNested(input *callFrame, traceAddress []int, convertErrs bool, ctx *tracers.Context) (output []flatCallFrame, err error) {
var frame *flatCallFrame
switch input.Type {
case vm.CREATE, vm.CREATE2:
frame = newFlatCreate(input)
case vm.SELFDESTRUCT:
frame = newFlatSuicide(input)
case vm.CALL, vm.STATICCALL, vm.CALLCODE, vm.DELEGATECALL:
frame = newFlatCall(input)
default:
return nil, fmt.Errorf("unrecognized call frame type: %s", input.Type)
}
frame.TraceAddress = traceAddress
frame.Error = input.Error
frame.Subtraces = len(input.Calls)
fillCallFrameFromContext(frame, ctx)
if convertErrs {
convertErrorToParity(frame)
}
// Revert output contains useful information (revert reason).
// Otherwise discard result.
if input.Error != "" && input.Error != vm.ErrExecutionReverted.Error() {
frame.Result = nil
}
output = append(output, *frame)
if len(input.Calls) > 0 {
for i, childCall := range input.Calls {
childAddr := childTraceAddress(traceAddress, i)
childCallCopy := childCall
flat, err := flatFromNested(&childCallCopy, childAddr, convertErrs, ctx)
if err != nil {
return nil, err
}
output = append(output, flat...)
}
}
return output, nil
}
func newFlatCreate(input *callFrame) *flatCallFrame {
var (
actionInit = input.Input[:]
resultCode = input.Output[:]
)
return &flatCallFrame{
Type: strings.ToLower(vm.CREATE.String()),
Action: flatCallAction{
From: &input.From,
Gas: &input.Gas,
Value: input.Value,
Init: &actionInit,
},
Result: &flatCallResult{
GasUsed: &input.GasUsed,
Address: &input.To,
Code: &resultCode,
},
}
}
func newFlatCall(input *callFrame) *flatCallFrame {
var (
actionInput = input.Input[:]
resultOutput = input.Output[:]
)
return &flatCallFrame{
Type: strings.ToLower(vm.CALL.String()),
Action: flatCallAction{
From: &input.From,
To: &input.To,
Gas: &input.Gas,
Value: input.Value,
CallType: strings.ToLower(input.Type.String()),
Input: &actionInput,
},
Result: &flatCallResult{
GasUsed: &input.GasUsed,
Output: &resultOutput,
},
}
}
func newFlatSuicide(input *callFrame) *flatCallFrame {
return &flatCallFrame{
Type: "suicide",
Action: flatCallAction{
SelfDestructed: &input.From,
Balance: input.Value,
RefundAddress: &input.To,
},
}
}
func fillCallFrameFromContext(callFrame *flatCallFrame, ctx *tracers.Context) {
if ctx == nil {
return
}
if ctx.BlockHash != (common.Hash{}) {
callFrame.BlockHash = &ctx.BlockHash
}
if ctx.BlockNumber != nil {
callFrame.BlockNumber = ctx.BlockNumber.Uint64()
}
if ctx.TxHash != (common.Hash{}) {
callFrame.TransactionHash = &ctx.TxHash
}
callFrame.TransactionPosition = uint64(ctx.TxIndex)
}
func convertErrorToParity(call *flatCallFrame) {
if call.Error == "" {
return
}
if parityError, ok := parityErrorMapping[call.Error]; ok {
call.Error = parityError
} else {
for gethError, parityError := range parityErrorMappingStartingWith {
if strings.HasPrefix(call.Error, gethError) {
call.Error = parityError
}
}
}
}
func childTraceAddress(a []int, i int) []int {
child := make([]int, 0, len(a)+1)
child = append(child, a...)
child = append(child, i)
return child
}

110
eth/tracers/native/gen_flatcallaction_json.go Normal file
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@ -0,0 +1,110 @@
// Code generated by github.com/fjl/gencodec. DO NOT EDIT.
package native
import (
"encoding/json"
"math/big"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/common/hexutil"
)
var _ = (*flatCallActionMarshaling)(nil)
// MarshalJSON marshals as JSON.
func (f flatCallAction) MarshalJSON() ([]byte, error) {
type flatCallAction struct {
Author *common.Address `json:"author,omitempty"`
RewardType string `json:"rewardType,omitempty"`
SelfDestructed *common.Address `json:"address,omitempty"`
Balance *hexutil.Big `json:"balance,omitempty"`
CallType string `json:"callType,omitempty"`
CreationMethod string `json:"creationMethod,omitempty"`
From *common.Address `json:"from,omitempty"`
Gas *hexutil.Uint64 `json:"gas,omitempty"`
Init *hexutil.Bytes `json:"init,omitempty"`
Input *hexutil.Bytes `json:"input,omitempty"`
RefundAddress *common.Address `json:"refundAddress,omitempty"`
To *common.Address `json:"to,omitempty"`
Value *hexutil.Big `json:"value,omitempty"`
}
var enc flatCallAction
enc.Author = f.Author
enc.RewardType = f.RewardType
enc.SelfDestructed = f.SelfDestructed
enc.Balance = (*hexutil.Big)(f.Balance)
enc.CallType = f.CallType
enc.CreationMethod = f.CreationMethod
enc.From = f.From
enc.Gas = (*hexutil.Uint64)(f.Gas)
enc.Init = (*hexutil.Bytes)(f.Init)
enc.Input = (*hexutil.Bytes)(f.Input)
enc.RefundAddress = f.RefundAddress
enc.To = f.To
enc.Value = (*hexutil.Big)(f.Value)
return json.Marshal(&enc)
}
// UnmarshalJSON unmarshals from JSON.
func (f *flatCallAction) UnmarshalJSON(input []byte) error {
type flatCallAction struct {
Author *common.Address `json:"author,omitempty"`
RewardType *string `json:"rewardType,omitempty"`
SelfDestructed *common.Address `json:"address,omitempty"`
Balance *hexutil.Big `json:"balance,omitempty"`
CallType *string `json:"callType,omitempty"`
CreationMethod *string `json:"creationMethod,omitempty"`
From *common.Address `json:"from,omitempty"`
Gas *hexutil.Uint64 `json:"gas,omitempty"`
Init *hexutil.Bytes `json:"init,omitempty"`
Input *hexutil.Bytes `json:"input,omitempty"`
RefundAddress *common.Address `json:"refundAddress,omitempty"`
To *common.Address `json:"to,omitempty"`
Value *hexutil.Big `json:"value,omitempty"`
}
var dec flatCallAction
if err := json.Unmarshal(input, &dec); err != nil {
return err
}
if dec.Author != nil {
f.Author = dec.Author
}
if dec.RewardType != nil {
f.RewardType = *dec.RewardType
}
if dec.SelfDestructed != nil {
f.SelfDestructed = dec.SelfDestructed
}
if dec.Balance != nil {
f.Balance = (*big.Int)(dec.Balance)
}
if dec.CallType != nil {
f.CallType = *dec.CallType
}
if dec.CreationMethod != nil {
f.CreationMethod = *dec.CreationMethod
}
if dec.From != nil {
f.From = dec.From
}
if dec.Gas != nil {
f.Gas = (*uint64)(dec.Gas)
}
if dec.Init != nil {
f.Init = (*[]byte)(dec.Init)
}
if dec.Input != nil {
f.Input = (*[]byte)(dec.Input)
}
if dec.RefundAddress != nil {
f.RefundAddress = dec.RefundAddress
}
if dec.To != nil {
f.To = dec.To
}
if dec.Value != nil {
f.Value = (*big.Int)(dec.Value)
}
return nil
}

55
eth/tracers/native/gen_flatcallresult_json.go Normal file
View File

@ -0,0 +1,55 @@
// Code generated by github.com/fjl/gencodec. DO NOT EDIT.
package native
import (
"encoding/json"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/common/hexutil"
)
var _ = (*flatCallResultMarshaling)(nil)
// MarshalJSON marshals as JSON.
func (f flatCallResult) MarshalJSON() ([]byte, error) {
type flatCallResult struct {
Address *common.Address `json:"address,omitempty"`
Code *hexutil.Bytes `json:"code,omitempty"`
GasUsed *hexutil.Uint64 `json:"gasUsed,omitempty"`
Output *hexutil.Bytes `json:"output,omitempty"`
}
var enc flatCallResult
enc.Address = f.Address
enc.Code = (*hexutil.Bytes)(f.Code)
enc.GasUsed = (*hexutil.Uint64)(f.GasUsed)
enc.Output = (*hexutil.Bytes)(f.Output)
return json.Marshal(&enc)
}
// UnmarshalJSON unmarshals from JSON.
func (f *flatCallResult) UnmarshalJSON(input []byte) error {
type flatCallResult struct {
Address *common.Address `json:"address,omitempty"`
Code *hexutil.Bytes `json:"code,omitempty"`
GasUsed *hexutil.Uint64 `json:"gasUsed,omitempty"`
Output *hexutil.Bytes `json:"output,omitempty"`
}
var dec flatCallResult
if err := json.Unmarshal(input, &dec); err != nil {
return err
}
if dec.Address != nil {
f.Address = dec.Address
}
if dec.Code != nil {
f.Code = (*[]byte)(dec.Code)
}
if dec.GasUsed != nil {
f.GasUsed = (*uint64)(dec.GasUsed)
}
if dec.Output != nil {
f.Output = (*[]byte)(dec.Output)
}
return nil
}

8
eth/tracers/tracers.go
View File

@ -19,6 +19,7 @@ package tracers
import ( import (
"encoding/json" "encoding/json"
"math/big"
"github.com/ethereum/go-ethereum/common" "github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core/vm" "github.com/ethereum/go-ethereum/core/vm"
@ -27,9 +28,10 @@ import (
// Context contains some contextual infos for a transaction execution that is not // Context contains some contextual infos for a transaction execution that is not
// available from within the EVM object. // available from within the EVM object.
type Context struct { type Context struct {
BlockHash common.Hash // Hash of the block the tx is contained within (zero if dangling tx or call) BlockHash common.Hash // Hash of the block the tx is contained within (zero if dangling tx or call)
TxIndex int // Index of the transaction within a block (zero if dangling tx or call) BlockNumber *big.Int // Number of the block the tx is contained within (zero if dangling tx or call)
TxHash common.Hash // Hash of the transaction being traced (zero if dangling call) TxIndex int // Index of the transaction within a block (zero if dangling tx or call)
TxHash common.Hash // Hash of the transaction being traced (zero if dangling call)
} }
// Tracer interface extends vm.EVMLogger and additionally // Tracer interface extends vm.EVMLogger and additionally