go-ethereum/tests/state_test_util.go

// Copyright 2015 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 tests

import (
	"encoding/hex"
	"encoding/json"
	"errors"
	"fmt"
	"math/big"
	"strings"

	"github.com/XinFinOrg/XDPoSChain/common"
	"github.com/XinFinOrg/XDPoSChain/common/hexutil"
	"github.com/XinFinOrg/XDPoSChain/common/math"
	"github.com/XinFinOrg/XDPoSChain/core"
	"github.com/XinFinOrg/XDPoSChain/core/rawdb"
	"github.com/XinFinOrg/XDPoSChain/core/state"
	"github.com/XinFinOrg/XDPoSChain/core/tracing"
	"github.com/XinFinOrg/XDPoSChain/core/types"
	"github.com/XinFinOrg/XDPoSChain/core/vm"
	"github.com/XinFinOrg/XDPoSChain/crypto"
	"github.com/XinFinOrg/XDPoSChain/ethdb"
	"github.com/XinFinOrg/XDPoSChain/params"
	"github.com/XinFinOrg/XDPoSChain/rlp"
	"github.com/holiman/uint256"
	"golang.org/x/crypto/sha3"
)

// StateTest checks transaction processing without block context.
// See https://github.com/ethereum/EIPs/issues/176 for the test format specification.
type StateTest struct {
	json stJSON
}

// StateSubtest selects a specific configuration of a General State Test.
type StateSubtest struct {
	Fork  string
	Index int
}

func (t *StateTest) UnmarshalJSON(in []byte) error {
	return json.Unmarshal(in, &t.json)
}

type stJSON struct {
	Env  stEnv                    `json:"env"`
	Pre  types.GenesisAlloc       `json:"pre"`
	Tx   stTransaction            `json:"transaction"`
	Out  hexutil.Bytes            `json:"out"`
	Post map[string][]stPostState `json:"post"`
}

type stPostState struct {
	Root    common.UnprefixedHash `json:"hash"`
	Logs    common.UnprefixedHash `json:"logs"`
	Indexes struct {
		Data  int `json:"data"`
		Gas   int `json:"gas"`
		Value int `json:"value"`
	}
}

//go:generate go run github.com/fjl/gencodec -type stEnv -field-override stEnvMarshaling -out gen_stenv.go

type stEnv struct {
	Coinbase   common.Address `json:"currentCoinbase"   gencodec:"required"`
	Difficulty *big.Int       `json:"currentDifficulty" gencodec:"required"`
	GasLimit   uint64         `json:"currentGasLimit"   gencodec:"required"`
	Number     uint64         `json:"currentNumber"     gencodec:"required"`
	Timestamp  uint64         `json:"currentTimestamp"  gencodec:"required"`
	BaseFee    *big.Int       `json:"currentBaseFee"  gencodec:"optional"`
}

type stEnvMarshaling struct {
	Coinbase   common.UnprefixedAddress
	Difficulty *math.HexOrDecimal256
	GasLimit   math.HexOrDecimal64
	Number     math.HexOrDecimal64
	Timestamp  math.HexOrDecimal64
	BaseFee    *math.HexOrDecimal256
}

//go:generate go run github.com/fjl/gencodec -type stTransaction -field-override stTransactionMarshaling -out gen_sttransaction.go

type stTransaction struct {
	GasPrice             *big.Int            `json:"gasPrice"`
	MaxFeePerGas         *big.Int            `json:"maxFeePerGas"`
	MaxPriorityFeePerGas *big.Int            `json:"maxPriorityFeePerGas"`
	Nonce                uint64              `json:"nonce"`
	To                   string              `json:"to"`
	Data                 []string            `json:"data"`
	AccessLists          []*types.AccessList `json:"accessLists,omitempty"`
	GasLimit             []uint64            `json:"gasLimit"`
	Value                []string            `json:"value"`
	PrivateKey           []byte              `json:"secretKey"`
	AuthorizationList    []*stAuthorization  `json:"authorizationList,omitempty"`
}

type stTransactionMarshaling struct {
	GasPrice             *math.HexOrDecimal256
	MaxFeePerGas         *math.HexOrDecimal256
	MaxPriorityFeePerGas *math.HexOrDecimal256
	Nonce                math.HexOrDecimal64
	GasLimit             []math.HexOrDecimal64
	PrivateKey           hexutil.Bytes
}

//go:generate go run github.com/fjl/gencodec -type stAuthorization -field-override stAuthorizationMarshaling -out gen_stauthorization.go

// Authorization is an authorization from an account to deploy code at its address.
type stAuthorization struct {
	ChainID *big.Int       `json:"chainId" gencodec:"required"`
	Address common.Address `json:"address" gencodec:"required"`
	Nonce   uint64         `json:"nonce" gencodec:"required"`
	V       uint8          `json:"v" gencodec:"required"`
	R       *big.Int       `json:"r" gencodec:"required"`
	S       *big.Int       `json:"s" gencodec:"required"`
}

// field type overrides for gencodec
type stAuthorizationMarshaling struct {
	ChainID *math.HexOrDecimal256
	Nonce   math.HexOrDecimal64
	V       math.HexOrDecimal64
	R       *math.HexOrDecimal256
	S       *math.HexOrDecimal256
}

// Subtests returns all valid subtests of the test.
func (t *StateTest) Subtests() []StateSubtest {
	var sub []StateSubtest
	for fork, pss := range t.json.Post {
		for i := range pss {
			sub = append(sub, StateSubtest{fork, i})
		}
	}
	return sub
}

// Run executes a specific subtest.
func (t *StateTest) Run(subtest StateSubtest, vmconfig vm.Config) (*state.StateDB, error) {
	config, ok := Forks[subtest.Fork]
	if !ok {
		return nil, UnsupportedForkError{subtest.Fork}
	}
	block := t.genesis(config).ToBlock()
	db := rawdb.NewMemoryDatabase()
	statedb := MakePreState(db, t.json.Pre)

	var baseFee *big.Int
	if config.IsEIP1559(new(big.Int)) {
		baseFee = t.json.Env.BaseFee
		if baseFee == nil {
			// Retesteth uses `0x10` for genesis baseFee. Therefore, it defaults to
			// parent - 2 : 0xa as the basefee for 'this' context.
			baseFee = big.NewInt(common.BaseFee.Int64())
		}
	}
	post := t.json.Post[subtest.Fork][subtest.Index]
	msg, err := t.json.Tx.toMessage(post, baseFee)
	if err != nil {
		return nil, err
	}

	// Prepare the EVM.
	txContext := core.NewEVMTxContext(msg)
	context := core.NewEVMBlockContext(block.Header(), nil, &t.json.Env.Coinbase)
	context.GetHash = vmTestBlockHash
	context.BaseFee = baseFee
	evm := vm.NewEVM(context, txContext, statedb, nil, config, vmconfig)

	// Execute the message.
	snapshot := statedb.Snapshot()
	gaspool := new(core.GasPool)
	gaspool.AddGas(block.GasLimit())

	coinbase := &t.json.Env.Coinbase
	if _, err := core.ApplyMessage(evm, msg, gaspool, *coinbase); err != nil {
		statedb.RevertToSnapshot(snapshot)
	}
	if logs := rlpHash(statedb.Logs()); logs != common.Hash(post.Logs) {
		return statedb, fmt.Errorf("post state logs hash mismatch: got %x, want %x", logs, post.Logs)
	}

	// Commit block
	root, _ := statedb.Commit(block.NumberU64(), config.IsEIP158(block.Number()))
	if root != common.Hash(post.Root) {
		return statedb, fmt.Errorf("post state root mismatch: got %x, want %x", root, post.Root)
	}
	// Re-init the post-state instance for further operation
	statedb, err = state.New(root, statedb.Database())
	if err != nil {
		return nil, err
	}
	return statedb, nil
}

func (t *StateTest) gasLimit(subtest StateSubtest) uint64 {
	return t.json.Tx.GasLimit[t.json.Post[subtest.Fork][subtest.Index].Indexes.Gas]
}

func MakePreState(db ethdb.Database, accounts types.GenesisAlloc) *state.StateDB {
	sdb := state.NewDatabase(db)
	statedb, _ := state.New(types.EmptyRootHash, sdb)
	for addr, a := range accounts {
		statedb.SetCode(addr, a.Code)
		statedb.SetNonce(addr, a.Nonce)
		statedb.SetBalance(addr, a.Balance, tracing.BalanceChangeUnspecified)
		for k, v := range a.Storage {
			statedb.SetState(addr, k, v)
		}
	}
	// Commit and re-open to start with a clean state.
	root, _ := statedb.Commit(0, false)
	statedb, _ = state.New(root, sdb)
	return statedb
}

func (t *StateTest) genesis(config *params.ChainConfig) *core.Genesis {
	return &core.Genesis{
		Config:     config,
		Coinbase:   t.json.Env.Coinbase,
		Difficulty: t.json.Env.Difficulty,
		GasLimit:   t.json.Env.GasLimit,
		Number:     t.json.Env.Number,
		Timestamp:  t.json.Env.Timestamp,
		Alloc:      t.json.Pre,
	}
}

func (tx *stTransaction) toMessage(ps stPostState, baseFee *big.Int) (*core.Message, error) {
	// Derive sender from private key if present.
	var from common.Address
	if len(tx.PrivateKey) > 0 {
		key, err := crypto.ToECDSA(tx.PrivateKey)
		if err != nil {
			return nil, fmt.Errorf("invalid private key: %v", err)
		}
		from = crypto.PubkeyToAddress(key.PublicKey)
	}
	// Parse recipient if present.
	var to *common.Address
	if tx.To != "" {
		to = new(common.Address)
		if err := to.UnmarshalText([]byte(tx.To)); err != nil {
			return nil, fmt.Errorf("invalid to address: %v", err)
		}
	}

	// Get values specific to this post state.
	if ps.Indexes.Data > len(tx.Data) {
		return nil, fmt.Errorf("tx data index %d out of bounds", ps.Indexes.Data)
	}
	if ps.Indexes.Value > len(tx.Value) {
		return nil, fmt.Errorf("tx value index %d out of bounds", ps.Indexes.Value)
	}
	if ps.Indexes.Gas > len(tx.GasLimit) {
		return nil, fmt.Errorf("tx gas limit index %d out of bounds", ps.Indexes.Gas)
	}
	dataHex := tx.Data[ps.Indexes.Data]
	valueHex := tx.Value[ps.Indexes.Value]
	gasLimit := tx.GasLimit[ps.Indexes.Gas]
	// Value, Data hex encoding is messy: https://github.com/ethereum/tests/issues/203
	value := new(big.Int)
	if valueHex != "0x" {
		v, ok := math.ParseBig256(valueHex)
		if !ok {
			return nil, fmt.Errorf("invalid tx value %q", valueHex)
		}
		value = v
	}
	data, err := hex.DecodeString(strings.TrimPrefix(dataHex, "0x"))
	if err != nil {
		return nil, fmt.Errorf("invalid tx data %q", dataHex)
	}
	var accessList types.AccessList
	if tx.AccessLists != nil && tx.AccessLists[ps.Indexes.Data] != nil {
		accessList = *tx.AccessLists[ps.Indexes.Data]
	}
	// If baseFee provided, set gasPrice to effectiveGasPrice.
	gasPrice := tx.GasPrice
	if baseFee != nil {
		if tx.MaxFeePerGas == nil {
			tx.MaxFeePerGas = gasPrice
		}
		if tx.MaxFeePerGas == nil {
			tx.MaxFeePerGas = new(big.Int)
		}
		if tx.MaxPriorityFeePerGas == nil {
			tx.MaxPriorityFeePerGas = tx.MaxFeePerGas
		}
		gasPrice = new(big.Int).Add(tx.MaxPriorityFeePerGas, baseFee)
		if gasPrice.Cmp(tx.MaxFeePerGas) > 0 {
			gasPrice.Set(tx.MaxFeePerGas)
		}
	}
	if gasPrice == nil {
		return nil, errors.New("no gas price provided")
	}
	var authList []types.SetCodeAuthorization
	if tx.AuthorizationList != nil {
		authList = make([]types.SetCodeAuthorization, len(tx.AuthorizationList))
		for i, auth := range tx.AuthorizationList {
			authList[i] = types.SetCodeAuthorization{
				ChainID: *uint256.MustFromBig(auth.ChainID),
				Address: auth.Address,
				Nonce:   auth.Nonce,
				V:       auth.V,
				R:       *uint256.MustFromBig(auth.R),
				S:       *uint256.MustFromBig(auth.S),
			}
		}
	}

	msg := &core.Message{
		From:                  from,
		To:                    to,
		Nonce:                 tx.Nonce,
		Value:                 value,
		GasLimit:              gasLimit,
		GasPrice:              tx.GasPrice,
		GasFeeCap:             tx.MaxFeePerGas,
		GasTipCap:             tx.MaxPriorityFeePerGas,
		Data:                  data,
		AccessList:            accessList,
		SetCodeAuthorizations: authList,
		SkipNonceChecks:       false,
		SkipFromEOACheck:      false,
	}
	return msg, nil
}

func rlpHash(x interface{}) (h common.Hash) {
	hw := sha3.NewLegacyKeccak256()
	if err := rlp.Encode(hw, x); err != nil {
		panic("can't encode: " + err.Error())
	}
	hw.Sum(h[:0])
	return h
}