adf130def8
This moves the tracing RPC API implementation to package eth/tracers. By doing so, package eth no longer depends on tracing and the duktape JS engine. The change also enables tracing using the light client. All tracing methods work with the light client, but it's a lot slower compared to using a full node.
89 lines
3.8 KiB
Go
89 lines
3.8 KiB
Go
// Copyright 2021 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 les
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import (
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"context"
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"errors"
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"fmt"
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"github.com/ethereum/go-ethereum/core"
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"github.com/ethereum/go-ethereum/core/state"
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"github.com/ethereum/go-ethereum/core/types"
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"github.com/ethereum/go-ethereum/core/vm"
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"github.com/ethereum/go-ethereum/light"
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)
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// stateAtBlock retrieves the state database associated with a certain block.
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func (leth *LightEthereum) stateAtBlock(ctx context.Context, block *types.Block, reexec uint64) (*state.StateDB, func(), error) {
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return light.NewState(ctx, block.Header(), leth.odr), func() {}, nil
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}
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// statesInRange retrieves a batch of state databases associated with the specific
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// block ranges.
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func (leth *LightEthereum) statesInRange(ctx context.Context, fromBlock *types.Block, toBlock *types.Block, reexec uint64) ([]*state.StateDB, func(), error) {
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var states []*state.StateDB
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for number := fromBlock.NumberU64(); number <= toBlock.NumberU64(); number++ {
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header, err := leth.blockchain.GetHeaderByNumberOdr(ctx, number)
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if err != nil {
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return nil, nil, err
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}
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states = append(states, light.NewState(ctx, header, leth.odr))
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}
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return states, nil, nil
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}
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// stateAtTransaction returns the execution environment of a certain transaction.
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func (leth *LightEthereum) stateAtTransaction(ctx context.Context, block *types.Block, txIndex int, reexec uint64) (core.Message, vm.BlockContext, *state.StateDB, func(), error) {
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// Short circuit if it's genesis block.
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if block.NumberU64() == 0 {
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return nil, vm.BlockContext{}, nil, nil, errors.New("no transaction in genesis")
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}
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// Create the parent state database
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parent, err := leth.blockchain.GetBlock(ctx, block.ParentHash(), block.NumberU64()-1)
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if err != nil {
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return nil, vm.BlockContext{}, nil, nil, err
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}
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statedb, _, err := leth.stateAtBlock(ctx, parent, reexec)
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if err != nil {
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return nil, vm.BlockContext{}, nil, nil, err
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}
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if txIndex == 0 && len(block.Transactions()) == 0 {
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return nil, vm.BlockContext{}, statedb, func() {}, nil
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}
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// Recompute transactions up to the target index.
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signer := types.MakeSigner(leth.blockchain.Config(), block.Number())
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for idx, tx := range block.Transactions() {
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// Assemble the transaction call message and return if the requested offset
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msg, _ := tx.AsMessage(signer)
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txContext := core.NewEVMTxContext(msg)
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context := core.NewEVMBlockContext(block.Header(), leth.blockchain, nil)
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if idx == txIndex {
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return msg, context, statedb, func() {}, nil
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}
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// Not yet the searched for transaction, execute on top of the current state
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vmenv := vm.NewEVM(context, txContext, statedb, leth.blockchain.Config(), vm.Config{})
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if _, err := core.ApplyMessage(vmenv, msg, new(core.GasPool).AddGas(tx.Gas())); err != nil {
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return nil, vm.BlockContext{}, nil, nil, fmt.Errorf("transaction %#x failed: %v", tx.Hash(), err)
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}
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// Ensure any modifications are committed to the state
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// Only delete empty objects if EIP158/161 (a.k.a Spurious Dragon) is in effect
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statedb.Finalise(vmenv.ChainConfig().IsEIP158(block.Number()))
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}
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return nil, vm.BlockContext{}, nil, nil, fmt.Errorf("transaction index %d out of range for block %#x", txIndex, block.Hash())
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}
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