d8a2305565
This PR adds support for block overrides when doing debug_traceCall.
- Previously, debug_traceCall against pending erroneously used a common.Hash{} stateroot when looking up the state, meaning that a totally empty state was used -- so it always failed,
- With this change, we reject executing debug_traceCall against pending.
- And we add ability to override all evm-visible header fields.
619 lines
20 KiB
Go
619 lines
20 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 tracers
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import (
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"bytes"
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"context"
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"crypto/ecdsa"
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"encoding/json"
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"errors"
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"fmt"
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"math/big"
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"reflect"
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"sort"
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"testing"
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"time"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/common/hexutil"
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"github.com/ethereum/go-ethereum/consensus"
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"github.com/ethereum/go-ethereum/consensus/ethash"
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"github.com/ethereum/go-ethereum/core"
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"github.com/ethereum/go-ethereum/core/rawdb"
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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/crypto"
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"github.com/ethereum/go-ethereum/eth/tracers/logger"
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"github.com/ethereum/go-ethereum/ethdb"
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"github.com/ethereum/go-ethereum/internal/ethapi"
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"github.com/ethereum/go-ethereum/params"
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"github.com/ethereum/go-ethereum/rpc"
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)
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var (
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errStateNotFound = errors.New("state not found")
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errBlockNotFound = errors.New("block not found")
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errTransactionNotFound = errors.New("transaction not found")
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)
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type testBackend struct {
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chainConfig *params.ChainConfig
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engine consensus.Engine
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chaindb ethdb.Database
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chain *core.BlockChain
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}
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func newTestBackend(t *testing.T, n int, gspec *core.Genesis, generator func(i int, b *core.BlockGen)) *testBackend {
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backend := &testBackend{
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chainConfig: params.TestChainConfig,
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engine: ethash.NewFaker(),
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chaindb: rawdb.NewMemoryDatabase(),
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}
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// Generate blocks for testing
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gspec.Config = backend.chainConfig
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var (
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gendb = rawdb.NewMemoryDatabase()
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genesis = gspec.MustCommit(gendb)
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)
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blocks, _ := core.GenerateChain(backend.chainConfig, genesis, backend.engine, gendb, n, generator)
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// Import the canonical chain
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gspec.MustCommit(backend.chaindb)
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cacheConfig := &core.CacheConfig{
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TrieCleanLimit: 256,
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TrieDirtyLimit: 256,
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TrieTimeLimit: 5 * time.Minute,
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SnapshotLimit: 0,
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TrieDirtyDisabled: true, // Archive mode
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}
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chain, err := core.NewBlockChain(backend.chaindb, cacheConfig, backend.chainConfig, backend.engine, vm.Config{}, nil, nil)
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if err != nil {
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t.Fatalf("failed to create tester chain: %v", err)
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}
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if n, err := chain.InsertChain(blocks); err != nil {
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t.Fatalf("block %d: failed to insert into chain: %v", n, err)
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}
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backend.chain = chain
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return backend
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}
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func (b *testBackend) HeaderByHash(ctx context.Context, hash common.Hash) (*types.Header, error) {
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return b.chain.GetHeaderByHash(hash), nil
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}
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func (b *testBackend) HeaderByNumber(ctx context.Context, number rpc.BlockNumber) (*types.Header, error) {
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if number == rpc.PendingBlockNumber || number == rpc.LatestBlockNumber {
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return b.chain.CurrentHeader(), nil
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}
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return b.chain.GetHeaderByNumber(uint64(number)), nil
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}
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func (b *testBackend) BlockByHash(ctx context.Context, hash common.Hash) (*types.Block, error) {
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return b.chain.GetBlockByHash(hash), nil
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}
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func (b *testBackend) BlockByNumber(ctx context.Context, number rpc.BlockNumber) (*types.Block, error) {
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if number == rpc.PendingBlockNumber || number == rpc.LatestBlockNumber {
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return b.chain.CurrentBlock(), nil
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}
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return b.chain.GetBlockByNumber(uint64(number)), nil
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}
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func (b *testBackend) GetTransaction(ctx context.Context, txHash common.Hash) (*types.Transaction, common.Hash, uint64, uint64, error) {
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tx, hash, blockNumber, index := rawdb.ReadTransaction(b.chaindb, txHash)
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if tx == nil {
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return nil, common.Hash{}, 0, 0, errTransactionNotFound
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}
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return tx, hash, blockNumber, index, nil
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}
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func (b *testBackend) RPCGasCap() uint64 {
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return 25000000
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}
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func (b *testBackend) ChainConfig() *params.ChainConfig {
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return b.chainConfig
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}
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func (b *testBackend) Engine() consensus.Engine {
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return b.engine
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}
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func (b *testBackend) ChainDb() ethdb.Database {
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return b.chaindb
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}
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func (b *testBackend) StateAtBlock(ctx context.Context, block *types.Block, reexec uint64, base *state.StateDB, checkLive bool, preferDisk bool) (*state.StateDB, error) {
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statedb, err := b.chain.StateAt(block.Root())
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if err != nil {
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return nil, errStateNotFound
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}
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return statedb, nil
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}
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func (b *testBackend) StateAtTransaction(ctx context.Context, block *types.Block, txIndex int, reexec uint64) (core.Message, vm.BlockContext, *state.StateDB, error) {
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parent := b.chain.GetBlock(block.ParentHash(), block.NumberU64()-1)
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if parent == nil {
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return nil, vm.BlockContext{}, nil, errBlockNotFound
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}
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statedb, err := b.chain.StateAt(parent.Root())
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if err != nil {
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return nil, vm.BlockContext{}, nil, errStateNotFound
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}
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if txIndex == 0 && len(block.Transactions()) == 0 {
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return nil, vm.BlockContext{}, statedb, nil
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}
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// Recompute transactions up to the target index.
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signer := types.MakeSigner(b.chainConfig, block.Number())
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for idx, tx := range block.Transactions() {
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msg, _ := tx.AsMessage(signer, block.BaseFee())
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txContext := core.NewEVMTxContext(msg)
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context := core.NewEVMBlockContext(block.Header(), b.chain, nil)
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if idx == txIndex {
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return msg, context, statedb, nil
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}
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vmenv := vm.NewEVM(context, txContext, statedb, b.chainConfig, 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, fmt.Errorf("transaction %#x failed: %v", tx.Hash(), err)
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}
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statedb.Finalise(vmenv.ChainConfig().IsEIP158(block.Number()))
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}
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return nil, vm.BlockContext{}, nil, fmt.Errorf("transaction index %d out of range for block %#x", txIndex, block.Hash())
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}
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func TestTraceCall(t *testing.T) {
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t.Parallel()
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// Initialize test accounts
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accounts := newAccounts(3)
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genesis := &core.Genesis{Alloc: core.GenesisAlloc{
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accounts[0].addr: {Balance: big.NewInt(params.Ether)},
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accounts[1].addr: {Balance: big.NewInt(params.Ether)},
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accounts[2].addr: {Balance: big.NewInt(params.Ether)},
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}}
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genBlocks := 10
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signer := types.HomesteadSigner{}
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api := NewAPI(newTestBackend(t, genBlocks, genesis, func(i int, b *core.BlockGen) {
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// Transfer from account[0] to account[1]
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// value: 1000 wei
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// fee: 0 wei
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tx, _ := types.SignTx(types.NewTransaction(uint64(i), accounts[1].addr, big.NewInt(1000), params.TxGas, b.BaseFee(), nil), signer, accounts[0].key)
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b.AddTx(tx)
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}))
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var testSuite = []struct {
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blockNumber rpc.BlockNumber
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call ethapi.TransactionArgs
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config *TraceCallConfig
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expectErr error
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expect string
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}{
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// Standard JSON trace upon the genesis, plain transfer.
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{
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blockNumber: rpc.BlockNumber(0),
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call: ethapi.TransactionArgs{
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From: &accounts[0].addr,
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To: &accounts[1].addr,
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Value: (*hexutil.Big)(big.NewInt(1000)),
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},
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config: nil,
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expectErr: nil,
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expect: `{"gas":21000,"failed":false,"returnValue":"","structLogs":[]}`,
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},
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// Standard JSON trace upon the head, plain transfer.
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{
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blockNumber: rpc.BlockNumber(genBlocks),
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call: ethapi.TransactionArgs{
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From: &accounts[0].addr,
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To: &accounts[1].addr,
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Value: (*hexutil.Big)(big.NewInt(1000)),
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},
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config: nil,
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expectErr: nil,
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expect: `{"gas":21000,"failed":false,"returnValue":"","structLogs":[]}`,
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},
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// Standard JSON trace upon the non-existent block, error expects
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{
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blockNumber: rpc.BlockNumber(genBlocks + 1),
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call: ethapi.TransactionArgs{
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From: &accounts[0].addr,
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To: &accounts[1].addr,
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Value: (*hexutil.Big)(big.NewInt(1000)),
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},
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config: nil,
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expectErr: fmt.Errorf("block #%d not found", genBlocks+1),
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//expect: nil,
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},
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// Standard JSON trace upon the latest block
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{
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blockNumber: rpc.LatestBlockNumber,
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call: ethapi.TransactionArgs{
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From: &accounts[0].addr,
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To: &accounts[1].addr,
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Value: (*hexutil.Big)(big.NewInt(1000)),
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},
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config: nil,
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expectErr: nil,
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expect: `{"gas":21000,"failed":false,"returnValue":"","structLogs":[]}`,
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},
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// Tracing on 'pending' should fail:
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{
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blockNumber: rpc.PendingBlockNumber,
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call: ethapi.TransactionArgs{
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From: &accounts[0].addr,
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To: &accounts[1].addr,
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Value: (*hexutil.Big)(big.NewInt(1000)),
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},
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config: nil,
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expectErr: errors.New("tracing on top of pending is not supported"),
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},
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{
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blockNumber: rpc.LatestBlockNumber,
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call: ethapi.TransactionArgs{
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From: &accounts[0].addr,
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Input: &hexutil.Bytes{0x43}, // blocknumber
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},
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config: &TraceCallConfig{
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BlockOverrides: ðapi.BlockOverrides{Number: (*hexutil.Big)(big.NewInt(0x1337))},
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},
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expectErr: nil,
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expect: ` {"gas":53018,"failed":false,"returnValue":"","structLogs":[
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{"pc":0,"op":"NUMBER","gas":24946984,"gasCost":2,"depth":1,"stack":[]},
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{"pc":1,"op":"STOP","gas":24946982,"gasCost":0,"depth":1,"stack":["0x1337"]}]}`,
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},
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}
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for i, testspec := range testSuite {
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result, err := api.TraceCall(context.Background(), testspec.call, rpc.BlockNumberOrHash{BlockNumber: &testspec.blockNumber}, testspec.config)
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if testspec.expectErr != nil {
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if err == nil {
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t.Errorf("test %d: expect error %v, got nothing", i, testspec.expectErr)
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continue
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}
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if !reflect.DeepEqual(err, testspec.expectErr) {
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t.Errorf("test %d: error mismatch, want %v, git %v", i, testspec.expectErr, err)
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}
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} else {
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if err != nil {
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t.Errorf("test %d: expect no error, got %v", i, err)
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continue
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}
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var have *logger.ExecutionResult
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if err := json.Unmarshal(result.(json.RawMessage), &have); err != nil {
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t.Errorf("test %d: failed to unmarshal result %v", i, err)
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}
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var want *logger.ExecutionResult
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if err := json.Unmarshal([]byte(testspec.expect), &want); err != nil {
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t.Errorf("test %d: failed to unmarshal result %v", i, err)
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}
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if !reflect.DeepEqual(have, want) {
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t.Errorf("test %d: result mismatch, want %v, got %v", i, testspec.expect, string(result.(json.RawMessage)))
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}
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}
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}
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}
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func TestTraceTransaction(t *testing.T) {
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t.Parallel()
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// Initialize test accounts
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accounts := newAccounts(2)
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genesis := &core.Genesis{Alloc: core.GenesisAlloc{
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accounts[0].addr: {Balance: big.NewInt(params.Ether)},
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accounts[1].addr: {Balance: big.NewInt(params.Ether)},
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}}
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target := common.Hash{}
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signer := types.HomesteadSigner{}
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api := NewAPI(newTestBackend(t, 1, genesis, func(i int, b *core.BlockGen) {
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// Transfer from account[0] to account[1]
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// value: 1000 wei
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// fee: 0 wei
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tx, _ := types.SignTx(types.NewTransaction(uint64(i), accounts[1].addr, big.NewInt(1000), params.TxGas, b.BaseFee(), nil), signer, accounts[0].key)
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b.AddTx(tx)
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target = tx.Hash()
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}))
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result, err := api.TraceTransaction(context.Background(), target, nil)
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if err != nil {
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t.Errorf("Failed to trace transaction %v", err)
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}
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var have *logger.ExecutionResult
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if err := json.Unmarshal(result.(json.RawMessage), &have); err != nil {
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t.Errorf("failed to unmarshal result %v", err)
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}
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if !reflect.DeepEqual(have, &logger.ExecutionResult{
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Gas: params.TxGas,
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Failed: false,
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ReturnValue: "",
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StructLogs: []logger.StructLogRes{},
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}) {
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t.Error("Transaction tracing result is different")
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}
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}
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func TestTraceBlock(t *testing.T) {
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t.Parallel()
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// Initialize test accounts
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accounts := newAccounts(3)
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genesis := &core.Genesis{Alloc: core.GenesisAlloc{
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accounts[0].addr: {Balance: big.NewInt(params.Ether)},
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accounts[1].addr: {Balance: big.NewInt(params.Ether)},
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accounts[2].addr: {Balance: big.NewInt(params.Ether)},
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}}
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genBlocks := 10
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signer := types.HomesteadSigner{}
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api := NewAPI(newTestBackend(t, genBlocks, genesis, func(i int, b *core.BlockGen) {
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// Transfer from account[0] to account[1]
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// value: 1000 wei
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// fee: 0 wei
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tx, _ := types.SignTx(types.NewTransaction(uint64(i), accounts[1].addr, big.NewInt(1000), params.TxGas, b.BaseFee(), nil), signer, accounts[0].key)
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b.AddTx(tx)
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}))
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var testSuite = []struct {
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blockNumber rpc.BlockNumber
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config *TraceConfig
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want string
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expectErr error
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}{
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// Trace genesis block, expect error
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{
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blockNumber: rpc.BlockNumber(0),
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expectErr: errors.New("genesis is not traceable"),
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},
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// Trace head block
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{
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blockNumber: rpc.BlockNumber(genBlocks),
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want: `[{"result":{"gas":21000,"failed":false,"returnValue":"","structLogs":[]}}]`,
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},
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// Trace non-existent block
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{
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blockNumber: rpc.BlockNumber(genBlocks + 1),
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expectErr: fmt.Errorf("block #%d not found", genBlocks+1),
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},
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// Trace latest block
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{
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blockNumber: rpc.LatestBlockNumber,
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want: `[{"result":{"gas":21000,"failed":false,"returnValue":"","structLogs":[]}}]`,
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},
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// Trace pending block
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{
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blockNumber: rpc.PendingBlockNumber,
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want: `[{"result":{"gas":21000,"failed":false,"returnValue":"","structLogs":[]}}]`,
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},
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}
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for i, tc := range testSuite {
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result, err := api.TraceBlockByNumber(context.Background(), tc.blockNumber, tc.config)
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if tc.expectErr != nil {
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if err == nil {
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t.Errorf("test %d, want error %v", i, tc.expectErr)
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continue
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}
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if !reflect.DeepEqual(err, tc.expectErr) {
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t.Errorf("test %d: error mismatch, want %v, get %v", i, tc.expectErr, err)
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}
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continue
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}
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if err != nil {
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t.Errorf("test %d, want no error, have %v", i, err)
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continue
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}
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have, _ := json.Marshal(result)
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want := tc.want
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if string(have) != want {
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t.Errorf("test %d, result mismatch, have\n%v\n, want\n%v\n", i, string(have), want)
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}
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}
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}
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func TestTracingWithOverrides(t *testing.T) {
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t.Parallel()
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// Initialize test accounts
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accounts := newAccounts(3)
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genesis := &core.Genesis{Alloc: core.GenesisAlloc{
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accounts[0].addr: {Balance: big.NewInt(params.Ether)},
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accounts[1].addr: {Balance: big.NewInt(params.Ether)},
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accounts[2].addr: {Balance: big.NewInt(params.Ether)},
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}}
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genBlocks := 10
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signer := types.HomesteadSigner{}
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api := NewAPI(newTestBackend(t, genBlocks, genesis, func(i int, b *core.BlockGen) {
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// Transfer from account[0] to account[1]
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// value: 1000 wei
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// fee: 0 wei
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tx, _ := types.SignTx(types.NewTransaction(uint64(i), accounts[1].addr, big.NewInt(1000), params.TxGas, b.BaseFee(), nil), signer, accounts[0].key)
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b.AddTx(tx)
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}))
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randomAccounts := newAccounts(3)
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type res struct {
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Gas int
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Failed bool
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ReturnValue string
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}
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var testSuite = []struct {
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blockNumber rpc.BlockNumber
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call ethapi.TransactionArgs
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config *TraceCallConfig
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expectErr error
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want string
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}{
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// Call which can only succeed if state is state overridden
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{
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blockNumber: rpc.LatestBlockNumber,
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call: ethapi.TransactionArgs{
|
|
From: &randomAccounts[0].addr,
|
|
To: &randomAccounts[1].addr,
|
|
Value: (*hexutil.Big)(big.NewInt(1000)),
|
|
},
|
|
config: &TraceCallConfig{
|
|
StateOverrides: ðapi.StateOverride{
|
|
randomAccounts[0].addr: ethapi.OverrideAccount{Balance: newRPCBalance(new(big.Int).Mul(big.NewInt(1), big.NewInt(params.Ether)))},
|
|
},
|
|
},
|
|
want: `{"gas":21000,"failed":false,"returnValue":""}`,
|
|
},
|
|
// Invalid call without state overriding
|
|
{
|
|
blockNumber: rpc.LatestBlockNumber,
|
|
call: ethapi.TransactionArgs{
|
|
From: &randomAccounts[0].addr,
|
|
To: &randomAccounts[1].addr,
|
|
Value: (*hexutil.Big)(big.NewInt(1000)),
|
|
},
|
|
config: &TraceCallConfig{},
|
|
expectErr: core.ErrInsufficientFunds,
|
|
},
|
|
// Successful simple contract call
|
|
//
|
|
// // SPDX-License-Identifier: GPL-3.0
|
|
//
|
|
// pragma solidity >=0.7.0 <0.8.0;
|
|
//
|
|
// /**
|
|
// * @title Storage
|
|
// * @dev Store & retrieve value in a variable
|
|
// */
|
|
// contract Storage {
|
|
// uint256 public number;
|
|
// constructor() {
|
|
// number = block.number;
|
|
// }
|
|
// }
|
|
{
|
|
blockNumber: rpc.LatestBlockNumber,
|
|
call: ethapi.TransactionArgs{
|
|
From: &randomAccounts[0].addr,
|
|
To: &randomAccounts[2].addr,
|
|
Data: newRPCBytes(common.Hex2Bytes("8381f58a")), // call number()
|
|
},
|
|
config: &TraceCallConfig{
|
|
//Tracer: &tracer,
|
|
StateOverrides: ðapi.StateOverride{
|
|
randomAccounts[2].addr: ethapi.OverrideAccount{
|
|
Code: newRPCBytes(common.Hex2Bytes("6080604052348015600f57600080fd5b506004361060285760003560e01c80638381f58a14602d575b600080fd5b60336049565b6040518082815260200191505060405180910390f35b6000548156fea2646970667358221220eab35ffa6ab2adfe380772a48b8ba78e82a1b820a18fcb6f59aa4efb20a5f60064736f6c63430007040033")),
|
|
StateDiff: newStates([]common.Hash{{}}, []common.Hash{common.BigToHash(big.NewInt(123))}),
|
|
},
|
|
},
|
|
},
|
|
want: `{"gas":23347,"failed":false,"returnValue":"000000000000000000000000000000000000000000000000000000000000007b"}`,
|
|
},
|
|
{ // Override blocknumber
|
|
blockNumber: rpc.LatestBlockNumber,
|
|
call: ethapi.TransactionArgs{
|
|
From: &accounts[0].addr,
|
|
// BLOCKNUMBER PUSH1 MSTORE
|
|
Input: newRPCBytes(common.Hex2Bytes("4360005260206000f3")),
|
|
//&hexutil.Bytes{0x43}, // blocknumber
|
|
},
|
|
config: &TraceCallConfig{
|
|
BlockOverrides: ðapi.BlockOverrides{Number: (*hexutil.Big)(big.NewInt(0x1337))},
|
|
},
|
|
want: `{"gas":59537,"failed":false,"returnValue":"0000000000000000000000000000000000000000000000000000000000001337"}`,
|
|
},
|
|
{ // Override blocknumber, and query a blockhash
|
|
blockNumber: rpc.LatestBlockNumber,
|
|
call: ethapi.TransactionArgs{
|
|
From: &accounts[0].addr,
|
|
Input: &hexutil.Bytes{
|
|
0x60, 0x00, 0x40, // BLOCKHASH(0)
|
|
0x60, 0x00, 0x52, // STORE memory offset 0
|
|
0x61, 0x13, 0x36, 0x40, // BLOCKHASH(0x1336)
|
|
0x60, 0x20, 0x52, // STORE memory offset 32
|
|
0x61, 0x13, 0x37, 0x40, // BLOCKHASH(0x1337)
|
|
0x60, 0x40, 0x52, // STORE memory offset 64
|
|
0x60, 0x60, 0x60, 0x00, 0xf3, // RETURN (0-96)
|
|
|
|
}, // blocknumber
|
|
},
|
|
config: &TraceCallConfig{
|
|
BlockOverrides: ðapi.BlockOverrides{Number: (*hexutil.Big)(big.NewInt(0x1337))},
|
|
},
|
|
want: `{"gas":72666,"failed":false,"returnValue":"000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"}`,
|
|
},
|
|
}
|
|
for i, tc := range testSuite {
|
|
result, err := api.TraceCall(context.Background(), tc.call, rpc.BlockNumberOrHash{BlockNumber: &tc.blockNumber}, tc.config)
|
|
if tc.expectErr != nil {
|
|
if err == nil {
|
|
t.Errorf("test %d: want error %v, have nothing", i, tc.expectErr)
|
|
continue
|
|
}
|
|
if !errors.Is(err, tc.expectErr) {
|
|
t.Errorf("test %d: error mismatch, want %v, have %v", i, tc.expectErr, err)
|
|
}
|
|
continue
|
|
}
|
|
if err != nil {
|
|
t.Errorf("test %d: want no error, have %v", i, err)
|
|
continue
|
|
}
|
|
// Turn result into res-struct
|
|
var (
|
|
have res
|
|
want res
|
|
)
|
|
resBytes, _ := json.Marshal(result)
|
|
json.Unmarshal(resBytes, &have)
|
|
json.Unmarshal([]byte(tc.want), &want)
|
|
if !reflect.DeepEqual(have, want) {
|
|
t.Errorf("test %d, result mismatch, have\n%v\n, want\n%v\n", i, string(resBytes), want)
|
|
}
|
|
}
|
|
}
|
|
|
|
type Account struct {
|
|
key *ecdsa.PrivateKey
|
|
addr common.Address
|
|
}
|
|
|
|
type Accounts []Account
|
|
|
|
func (a Accounts) Len() int { return len(a) }
|
|
func (a Accounts) Swap(i, j int) { a[i], a[j] = a[j], a[i] }
|
|
func (a Accounts) Less(i, j int) bool { return bytes.Compare(a[i].addr.Bytes(), a[j].addr.Bytes()) < 0 }
|
|
|
|
func newAccounts(n int) (accounts Accounts) {
|
|
for i := 0; i < n; i++ {
|
|
key, _ := crypto.GenerateKey()
|
|
addr := crypto.PubkeyToAddress(key.PublicKey)
|
|
accounts = append(accounts, Account{key: key, addr: addr})
|
|
}
|
|
sort.Sort(accounts)
|
|
return accounts
|
|
}
|
|
|
|
func newRPCBalance(balance *big.Int) **hexutil.Big {
|
|
rpcBalance := (*hexutil.Big)(balance)
|
|
return &rpcBalance
|
|
}
|
|
|
|
func newRPCBytes(bytes []byte) *hexutil.Bytes {
|
|
rpcBytes := hexutil.Bytes(bytes)
|
|
return &rpcBytes
|
|
}
|
|
|
|
func newStates(keys []common.Hash, vals []common.Hash) *map[common.Hash]common.Hash {
|
|
if len(keys) != len(vals) {
|
|
panic("invalid input")
|
|
}
|
|
m := make(map[common.Hash]common.Hash)
|
|
for i := 0; i < len(keys); i++ {
|
|
m[keys[i]] = vals[i]
|
|
}
|
|
return &m
|
|
}
|