mirror of https://github.com/ethereum/go-ethereum
eth/tracers: remove revertReasonTracer, add revert reason to callTracer (#25508)
* eth/tracers: add revertReason to callTracer * update callframe gen json * add revertal to calltrace testpull/25892/head
Sina Mahmoodi
2 years ago
committed by
GitHub
parent
c2918c2f47
commit
ff1f49245d
@ -1,108 +0,0 @@ |
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// Copyright 2022 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package native |
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import ( |
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"bytes" |
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"encoding/json" |
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"math/big" |
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"sync/atomic" |
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"time" |
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"github.com/ethereum/go-ethereum/accounts/abi" |
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"github.com/ethereum/go-ethereum/common" |
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"github.com/ethereum/go-ethereum/core/vm" |
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"github.com/ethereum/go-ethereum/crypto" |
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"github.com/ethereum/go-ethereum/eth/tracers" |
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) |
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func init() { |
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register("revertReasonTracer", newRevertReasonTracer) |
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} |
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var revertSelector = crypto.Keccak256([]byte("Error(string)"))[:4] |
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// revertReasonTracer is a go implementation of the Tracer interface which
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// track the error message or revert reason return by the contract.
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type revertReasonTracer struct { |
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env *vm.EVM |
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revertReason string // The revert reason return from the tx, if tx success, empty string return
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interrupt uint32 // Atomic flag to signal execution interruption
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reason error // Textual reason for the interruption
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} |
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// newRevertReasonTracer returns a new revert reason tracer.
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func newRevertReasonTracer(_ *tracers.Context, _ json.RawMessage) (tracers.Tracer, error) { |
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return &revertReasonTracer{}, nil |
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} |
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// CaptureStart implements the EVMLogger interface to initialize the tracing operation.
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func (t *revertReasonTracer) CaptureStart(env *vm.EVM, _ common.Address, _ common.Address, _ bool, _ []byte, _ uint64, _ *big.Int) { |
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t.env = env |
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} |
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// CaptureEnd is called after the call finishes to finalize the tracing.
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func (t *revertReasonTracer) CaptureEnd(output []byte, _ uint64, _ time.Duration, err error) { |
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if err != nil { |
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if err == vm.ErrExecutionReverted && len(output) > 4 && bytes.Equal(output[:4], revertSelector) { |
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errMsg, _ := abi.UnpackRevert(output) |
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t.revertReason = err.Error() + ": " + errMsg |
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} else { |
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t.revertReason = err.Error() |
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} |
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} |
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} |
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// CaptureState implements the EVMLogger interface to trace a single step of VM execution.
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func (t *revertReasonTracer) CaptureState(_ uint64, _ vm.OpCode, _, _ uint64, _ *vm.ScopeContext, _ []byte, _ int, _ error) { |
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} |
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// CaptureFault implements the EVMLogger interface to trace an execution fault.
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func (t *revertReasonTracer) CaptureFault(_ uint64, _ vm.OpCode, _, _ uint64, _ *vm.ScopeContext, _ int, _ error) { |
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} |
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// CaptureEnter is called when EVM enters a new scope (via call, create or selfdestruct).
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func (t *revertReasonTracer) CaptureEnter(_ vm.OpCode, _ common.Address, _ common.Address, _ []byte, _ uint64, _ *big.Int) { |
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// Skip if tracing was interrupted
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if atomic.LoadUint32(&t.interrupt) > 0 { |
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t.env.Cancel() |
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return |
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} |
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} |
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// CaptureExit is called when EVM exits a scope, even if the scope didn't
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// execute any code.
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func (t *revertReasonTracer) CaptureExit(_ []byte, _ uint64, _ error) {} |
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func (t *revertReasonTracer) CaptureTxStart(_ uint64) {} |
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func (t *revertReasonTracer) CaptureTxEnd(_ uint64) {} |
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// GetResult returns an error message json object.
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func (t *revertReasonTracer) GetResult() (json.RawMessage, error) { |
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res, err := json.Marshal(t.revertReason) |
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if err != nil { |
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return nil, err |
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} |
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return res, t.reason |
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} |
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// Stop terminates execution of the tracer at the first opportune moment.
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func (t *revertReasonTracer) Stop(err error) { |
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t.reason = err |
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atomic.StoreUint32(&t.interrupt, 1) |
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} |
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