224 lines
7.0 KiB
Go
224 lines
7.0 KiB
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 core
|
|
|
|
import (
|
|
"fmt"
|
|
"time"
|
|
|
|
"github.com/ethereum/go-ethereum/common"
|
|
"github.com/ethereum/go-ethereum/consensus"
|
|
"github.com/ethereum/go-ethereum/core/state"
|
|
"github.com/ethereum/go-ethereum/core/types"
|
|
"github.com/ethereum/go-ethereum/params"
|
|
"github.com/ethereum/go-ethereum/trie"
|
|
)
|
|
|
|
const badBlockCacheExpire = 30 * time.Second
|
|
|
|
type BlockValidatorOption func(*BlockValidator) *BlockValidator
|
|
|
|
func EnableRemoteVerifyManager(remoteValidator *remoteVerifyManager) BlockValidatorOption {
|
|
return func(bv *BlockValidator) *BlockValidator {
|
|
bv.remoteValidator = remoteValidator
|
|
return bv
|
|
}
|
|
}
|
|
|
|
// BlockValidator is responsible for validating block headers, uncles and
|
|
// processed state.
|
|
//
|
|
// BlockValidator implements Validator.
|
|
type BlockValidator struct {
|
|
config *params.ChainConfig // Chain configuration options
|
|
bc *BlockChain // Canonical block chain
|
|
engine consensus.Engine // Consensus engine used for validating
|
|
remoteValidator *remoteVerifyManager
|
|
}
|
|
|
|
// NewBlockValidator returns a new block validator which is safe for re-use
|
|
func NewBlockValidator(config *params.ChainConfig, blockchain *BlockChain, engine consensus.Engine, opts ...BlockValidatorOption) *BlockValidator {
|
|
validator := &BlockValidator{
|
|
config: config,
|
|
engine: engine,
|
|
bc: blockchain,
|
|
}
|
|
|
|
for _, opt := range opts {
|
|
validator = opt(validator)
|
|
}
|
|
|
|
return validator
|
|
}
|
|
|
|
// ValidateBody validates the given block's uncles and verifies the block
|
|
// header's transaction and uncle roots. The headers are assumed to be already
|
|
// validated at this point.
|
|
func (v *BlockValidator) ValidateBody(block *types.Block) error {
|
|
// Check whether the block's known, and if not, that it's linkable
|
|
if v.bc.HasBlockAndState(block.Hash(), block.NumberU64()) {
|
|
return ErrKnownBlock
|
|
}
|
|
if v.bc.isCachedBadBlock(block) {
|
|
return ErrKnownBadBlock
|
|
}
|
|
// Header validity is known at this point, check the uncles and transactions
|
|
header := block.Header()
|
|
if err := v.engine.VerifyUncles(v.bc, block); err != nil {
|
|
return err
|
|
}
|
|
if hash := types.CalcUncleHash(block.Uncles()); hash != header.UncleHash {
|
|
return fmt.Errorf("uncle root hash mismatch: have %x, want %x", hash, header.UncleHash)
|
|
}
|
|
|
|
validateFuns := []func() error{
|
|
func() error {
|
|
if v.bc.HasBlockAndState(block.Hash(), block.NumberU64()) {
|
|
return ErrKnownBlock
|
|
}
|
|
return nil
|
|
},
|
|
func() error {
|
|
if hash := types.DeriveSha(block.Transactions(), trie.NewStackTrie(nil)); hash != header.TxHash {
|
|
return fmt.Errorf("transaction root hash mismatch: have %x, want %x", hash, header.TxHash)
|
|
}
|
|
return nil
|
|
},
|
|
func() error {
|
|
if !v.bc.HasBlockAndState(block.ParentHash(), block.NumberU64()-1) {
|
|
if !v.bc.HasBlock(block.ParentHash(), block.NumberU64()-1) {
|
|
return consensus.ErrUnknownAncestor
|
|
}
|
|
return consensus.ErrPrunedAncestor
|
|
}
|
|
return nil
|
|
},
|
|
func() error {
|
|
if v.remoteValidator != nil && !v.remoteValidator.AncestorVerified(block.Header()) {
|
|
return fmt.Errorf("%w, number: %s, hash: %s", ErrAncestorHasNotBeenVerified, block.Number(), block.Hash())
|
|
}
|
|
return nil
|
|
},
|
|
}
|
|
validateRes := make(chan error, len(validateFuns))
|
|
for _, f := range validateFuns {
|
|
tmpFunc := f
|
|
go func() {
|
|
validateRes <- tmpFunc()
|
|
}()
|
|
}
|
|
for i := 0; i < len(validateFuns); i++ {
|
|
r := <-validateRes
|
|
if r != nil {
|
|
return r
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// ValidateState validates the various changes that happen after a state
|
|
// transition, such as amount of used gas, the receipt roots and the state root
|
|
// itself. ValidateState returns a database batch if the validation was a success
|
|
// otherwise nil and an error is returned.
|
|
func (v *BlockValidator) ValidateState(block *types.Block, statedb *state.StateDB, receipts types.Receipts, usedGas uint64) error {
|
|
header := block.Header()
|
|
if block.GasUsed() != usedGas {
|
|
return fmt.Errorf("invalid gas used (remote: %d local: %d)", block.GasUsed(), usedGas)
|
|
}
|
|
// Validate the received block's bloom with the one derived from the generated receipts.
|
|
// For valid blocks this should always validate to true.
|
|
validateFuns := []func() error{
|
|
func() error {
|
|
rbloom := types.CreateBloom(receipts)
|
|
if rbloom != header.Bloom {
|
|
return fmt.Errorf("invalid bloom (remote: %x local: %x)", header.Bloom, rbloom)
|
|
}
|
|
return nil
|
|
},
|
|
func() error {
|
|
receiptSha := types.DeriveSha(receipts, trie.NewStackTrie(nil))
|
|
if receiptSha != header.ReceiptHash {
|
|
return fmt.Errorf("invalid receipt root hash (remote: %x local: %x)", header.ReceiptHash, receiptSha)
|
|
}
|
|
return nil
|
|
},
|
|
}
|
|
if statedb.IsPipeCommit() {
|
|
validateFuns = append(validateFuns, func() error {
|
|
if err := statedb.WaitPipeVerification(); err != nil {
|
|
return err
|
|
}
|
|
statedb.CorrectAccountsRoot(common.Hash{})
|
|
statedb.Finalise(v.config.IsEIP158(header.Number))
|
|
return nil
|
|
})
|
|
} else {
|
|
validateFuns = append(validateFuns, func() error {
|
|
if root := statedb.IntermediateRoot(v.config.IsEIP158(header.Number)); header.Root != root {
|
|
return fmt.Errorf("invalid merkle root (remote: %x local: %x)", header.Root, root)
|
|
}
|
|
return nil
|
|
})
|
|
}
|
|
validateRes := make(chan error, len(validateFuns))
|
|
for _, f := range validateFuns {
|
|
tmpFunc := f
|
|
go func() {
|
|
validateRes <- tmpFunc()
|
|
}()
|
|
}
|
|
|
|
var err error
|
|
for i := 0; i < len(validateFuns); i++ {
|
|
r := <-validateRes
|
|
if r != nil && err == nil {
|
|
err = r
|
|
}
|
|
}
|
|
return err
|
|
}
|
|
|
|
func (v *BlockValidator) RemoteVerifyManager() *remoteVerifyManager {
|
|
return v.remoteValidator
|
|
}
|
|
|
|
// CalcGasLimit computes the gas limit of the next block after parent. It aims
|
|
// to keep the baseline gas close to the provided target, and increase it towards
|
|
// the target if the baseline gas is lower.
|
|
func CalcGasLimit(parentGasLimit, desiredLimit uint64) uint64 {
|
|
delta := parentGasLimit/params.GasLimitBoundDivisor - 1
|
|
limit := parentGasLimit
|
|
if desiredLimit < params.MinGasLimit {
|
|
desiredLimit = params.MinGasLimit
|
|
}
|
|
// If we're outside our allowed gas range, we try to hone towards them
|
|
if limit < desiredLimit {
|
|
limit = parentGasLimit + delta
|
|
if limit > desiredLimit {
|
|
limit = desiredLimit
|
|
}
|
|
return limit
|
|
}
|
|
if limit > desiredLimit {
|
|
limit = parentGasLimit - delta
|
|
if limit < desiredLimit {
|
|
limit = desiredLimit
|
|
}
|
|
}
|
|
return limit
|
|
}
|