mirror of
https://github.com/ethereum/go-ethereum.git
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259 lines
10 KiB
Go
259 lines
10 KiB
Go
// Copyright 2015 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 core
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import (
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"errors"
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"fmt"
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"github.com/XinFinOrg/XDPoSChain/XDCx/tradingstate"
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"github.com/XinFinOrg/XDPoSChain/XDCxlending/lendingstate"
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"github.com/XinFinOrg/XDPoSChain/common"
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"github.com/XinFinOrg/XDPoSChain/consensus"
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"github.com/XinFinOrg/XDPoSChain/consensus/XDPoS"
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"github.com/XinFinOrg/XDPoSChain/core/state"
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"github.com/XinFinOrg/XDPoSChain/core/types"
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"github.com/XinFinOrg/XDPoSChain/log"
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"github.com/XinFinOrg/XDPoSChain/params"
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"github.com/XinFinOrg/XDPoSChain/trie"
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)
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// BlockValidator is responsible for validating block headers, uncles and
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// processed state.
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//
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// BlockValidator implements Validator.
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type BlockValidator struct {
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config *params.ChainConfig // Chain configuration options
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bc *BlockChain // Canonical block chain
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engine consensus.Engine // Consensus engine used for validating
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}
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// NewBlockValidator returns a new block validator which is safe for re-use
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func NewBlockValidator(config *params.ChainConfig, blockchain *BlockChain, engine consensus.Engine) *BlockValidator {
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validator := &BlockValidator{
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config: config,
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engine: engine,
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bc: blockchain,
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}
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return validator
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}
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// ValidateBody validates the given block's uncles and verifies the block
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// header's transaction and uncle roots. The headers are assumed to be already
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// validated at this point.
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func (v *BlockValidator) ValidateBody(block *types.Block) error {
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// Check whether the block's known, and if not, that it's linkable
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if v.bc.HasBlockAndFullState(block.Hash(), block.NumberU64()) {
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return ErrKnownBlock
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}
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// Header validity is known at this point, check the uncles and transactions
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header := block.Header()
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if err := v.engine.VerifyUncles(v.bc, block); err != nil {
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return err
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}
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if hash := types.CalcUncleHash(block.Uncles()); hash != header.UncleHash {
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return fmt.Errorf("uncle root hash mismatch: have %x, want %x", hash, header.UncleHash)
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}
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if hash := types.DeriveSha(block.Transactions(), trie.NewStackTrie(nil)); hash != header.TxHash {
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return fmt.Errorf("transaction root hash mismatch: have %x, want %x", hash, header.TxHash)
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}
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if !v.bc.HasBlockAndFullState(block.ParentHash(), block.NumberU64()-1) {
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if !v.bc.HasBlock(block.ParentHash(), block.NumberU64()-1) {
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return consensus.ErrUnknownAncestor
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}
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return consensus.ErrPrunedAncestor
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}
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return nil
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}
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// ValidateState validates the various changes that happen after a state
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// transition, such as amount of used gas, the receipt roots and the state root
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// itself. ValidateState returns a database batch if the validation was a success
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// otherwise nil and an error is returned.
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func (v *BlockValidator) ValidateState(block, parent *types.Block, statedb *state.StateDB, receipts types.Receipts, usedGas uint64) error {
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header := block.Header()
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if block.GasUsed() != usedGas {
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return fmt.Errorf("invalid gas used (remote: %d local: %d)", block.GasUsed(), usedGas)
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}
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// Validate the received block's bloom with the one derived from the generated receipts.
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// For valid blocks this should always validate to true.
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rbloom := types.CreateBloom(receipts)
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if rbloom != header.Bloom {
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return fmt.Errorf("invalid bloom (remote: %x local: %x)", header.Bloom, rbloom)
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}
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// Tre receipt Trie's root (R = (Tr [[H1, R1], ... [Hn, R1]]))
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receiptSha := types.DeriveSha(receipts, trie.NewStackTrie(nil))
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if receiptSha != header.ReceiptHash {
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return fmt.Errorf("invalid receipt root hash (remote: %x local: %x)", header.ReceiptHash, receiptSha)
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}
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// Validate the state root against the received state root and throw
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// an error if they don't match.
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if root := statedb.IntermediateRoot(v.config.IsEIP158(header.Number)); header.Root != root {
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return fmt.Errorf("invalid merkle root (remote: %x local: %x)", header.Root, root)
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}
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return nil
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}
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func (v *BlockValidator) ValidateTradingOrder(statedb *state.StateDB, XDCxStatedb *tradingstate.TradingStateDB, txMatchBatch tradingstate.TxMatchBatch, coinbase common.Address, header *types.Header) error {
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XDPoSEngine, ok := v.bc.Engine().(*XDPoS.XDPoS)
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if XDPoSEngine == nil || !ok {
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return ErrNotXDPoS
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}
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XDCXService := XDPoSEngine.GetXDCXService()
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if XDCXService == nil {
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return errors.New("XDCx not found")
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}
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log.Debug("verify matching transaction found a TxMatches Batch", "numTxMatches", len(txMatchBatch.Data))
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tradingResult := map[common.Hash]tradingstate.MatchingResult{}
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for _, txMatch := range txMatchBatch.Data {
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// verify orderItem
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order, err := txMatch.DecodeOrder()
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if err != nil {
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log.Error("transaction match is corrupted. Failed decode order", "err", err)
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continue
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}
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log.Debug("process tx match", "order", order)
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// process Matching Engine
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newTrades, newRejectedOrders, err := XDCXService.ApplyOrder(header, coinbase, v.bc, statedb, XDCxStatedb, tradingstate.GetTradingOrderBookHash(order.BaseToken, order.QuoteToken), order)
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if err != nil {
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return err
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}
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tradingResult[tradingstate.GetMatchingResultCacheKey(order)] = tradingstate.MatchingResult{
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Trades: newTrades,
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Rejects: newRejectedOrders,
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}
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}
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if XDCXService.IsSDKNode() {
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v.bc.AddMatchingResult(txMatchBatch.TxHash, tradingResult)
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}
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return nil
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}
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func (v *BlockValidator) ValidateLendingOrder(statedb *state.StateDB, lendingStateDb *lendingstate.LendingStateDB, XDCxStatedb *tradingstate.TradingStateDB, batch lendingstate.TxLendingBatch, coinbase common.Address, header *types.Header) error {
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XDPoSEngine, ok := v.bc.Engine().(*XDPoS.XDPoS)
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if XDPoSEngine == nil || !ok {
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return ErrNotXDPoS
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}
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XDCXService := XDPoSEngine.GetXDCXService()
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if XDCXService == nil {
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return errors.New("XDCx not found")
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}
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lendingService := XDPoSEngine.GetLendingService()
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if lendingService == nil {
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return errors.New("lendingService not found")
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}
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log.Debug("verify lendingItem ", "numItems", len(batch.Data))
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lendingResult := map[common.Hash]lendingstate.MatchingResult{}
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for _, l := range batch.Data {
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// verify lendingItem
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log.Debug("process lending tx", "lendingItem", lendingstate.ToJSON(l))
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// process Matching Engine
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newTrades, newRejectedOrders, err := lendingService.ApplyOrder(header, coinbase, v.bc, statedb, lendingStateDb, XDCxStatedb, lendingstate.GetLendingOrderBookHash(l.LendingToken, l.Term), l)
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if err != nil {
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return err
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}
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lendingResult[lendingstate.GetLendingCacheKey(l)] = lendingstate.MatchingResult{
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Trades: newTrades,
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Rejects: newRejectedOrders,
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}
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}
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if XDCXService.IsSDKNode() {
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v.bc.AddLendingResult(batch.TxHash, lendingResult)
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}
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return nil
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}
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// CalcGasLimit computes the gas limit of the next block after parent.
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// This is miner strategy, not consensus protocol.
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func CalcGasLimit(parent *types.Block) uint64 {
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// contrib = (parentGasUsed * 3 / 2) / 1024
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contrib := (parent.GasUsed() + parent.GasUsed()/2) / params.GasLimitBoundDivisor
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// decay = parentGasLimit / 1024 -1
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decay := parent.GasLimit()/params.GasLimitBoundDivisor - 1
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/*
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strategy: gasLimit of block-to-mine is set based on parent's
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gasUsed value. if parentGasUsed > parentGasLimit * (2/3) then we
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increase it, otherwise lower it (or leave it unchanged if it's right
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at that usage) the amount increased/decreased depends on how far away
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from parentGasLimit * (2/3) parentGasUsed is.
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*/
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limit := parent.GasLimit() - decay + contrib
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if limit < params.MinGasLimit {
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limit = params.MinGasLimit
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}
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// however, if we're now below the target (TargetGasLimit) we increase the
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// limit as much as we can (parentGasLimit / 1024 -1)
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if limit < params.TargetGasLimit {
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limit = parent.GasLimit() + decay
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if limit > params.TargetGasLimit {
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limit = params.TargetGasLimit
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}
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}
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return limit
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}
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func ExtractTradingTransactions(transactions types.Transactions) ([]tradingstate.TxMatchBatch, error) {
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txMatchBatchData := []tradingstate.TxMatchBatch{}
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for _, tx := range transactions {
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if tx.IsTradingTransaction() {
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txMatchBatch, err := tradingstate.DecodeTxMatchesBatch(tx.Data())
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if err != nil {
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log.Error("transaction match is corrupted. Failed to decode txMatchBatch", "err", err, "txHash", tx.Hash().Hex())
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continue
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}
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txMatchBatch.TxHash = tx.Hash()
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txMatchBatchData = append(txMatchBatchData, txMatchBatch)
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}
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}
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return txMatchBatchData, nil
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}
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func ExtractLendingTransactions(transactions types.Transactions) ([]lendingstate.TxLendingBatch, error) {
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batchData := []lendingstate.TxLendingBatch{}
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for _, tx := range transactions {
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if tx.IsLendingTransaction() {
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txMatchBatch, err := lendingstate.DecodeTxLendingBatch(tx.Data())
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if err != nil {
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log.Error("transaction match is corrupted. Failed to decode lendingTransaction", "err", err, "txHash", tx.Hash().Hex())
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continue
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}
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txMatchBatch.TxHash = tx.Hash()
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batchData = append(batchData, txMatchBatch)
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}
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}
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return batchData, nil
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}
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func ExtractLendingFinalizedTradeTransactions(transactions types.Transactions) (lendingstate.FinalizedResult, error) {
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for _, tx := range transactions {
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if tx.IsLendingFinalizedTradeTransaction() {
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finalizedTrades, err := lendingstate.DecodeFinalizedResult(tx.Data())
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if err != nil {
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log.Error("transaction is corrupted. Failed to decode LendingClosedTradeTransaction", "err", err, "txHash", tx.Hash().Hex())
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continue
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}
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finalizedTrades.TxHash = tx.Hash()
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// each block has only one tx of this type
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return finalizedTrades, nil
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}
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}
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return lendingstate.FinalizedResult{}, nil
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}
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