Golang StateDB.Commit方法代碼示例

func RunState(ruleSet RuleSet, statedb *state.StateDB, env, tx map[string]string) ([]byte, vm.Logs, *big.Int, error) {
	var (
		data  = common.FromHex(tx["data"])
		gas   = common.Big(tx["gasLimit"])
		price = common.Big(tx["gasPrice"])
		value = common.Big(tx["value"])
		nonce = common.Big(tx["nonce"]).Uint64()
	)

	var to *common.Address
	if len(tx["to"]) > 2 {
		t := common.HexToAddress(tx["to"])
		to = &t
	}
	// Set pre compiled contracts
	vm.Precompiled = vm.PrecompiledContracts()
	snapshot := statedb.Copy()
	gaspool := new(core.GasPool).AddGas(common.Big(env["currentGasLimit"]))

	key, _ := hex.DecodeString(tx["secretKey"])
	addr := crypto.PubkeyToAddress(crypto.ToECDSA(key).PublicKey)
	message := NewMessage(addr, to, data, value, gas, price, nonce)
	vmenv := NewEnvFromMap(ruleSet, statedb, env, tx)
	vmenv.origin = addr
	ret, _, err := core.ApplyMessage(vmenv, message, gaspool)
	if core.IsNonceErr(err) || core.IsInvalidTxErr(err) || core.IsGasLimitErr(err) {
		statedb.Set(snapshot)
	}
	statedb.Commit()

	return ret, vmenv.state.Logs(), vmenv.Gas, err
}

//.........這裏部分代碼省略.........

				self.futureBlocks.Add(block.Hash(), block)
				stats.queued++
				continue
			}

			if IsParentErr(err) && self.futureBlocks.Contains(block.ParentHash()) {
				self.futureBlocks.Add(block.Hash(), block)
				stats.queued++
				continue
			}

			reportBlock(block, err)

			return i, err
		}

		// Create a new statedb using the parent block and report an
		// error if it fails.
		if statedb == nil {
			statedb, err = state.New(self.GetBlock(block.ParentHash()).Root(), self.chainDb)
		} else {
			err = statedb.Reset(chain[i-1].Root())
		}
		if err != nil {
			reportBlock(block, err)
			return i, err
		}
		// Process block using the parent state as reference point.
		receipts, logs, usedGas, err := self.processor.Process(block, statedb, self.config.VmConfig)
		if err != nil {
			reportBlock(block, err)
			return i, err
		}
		// Validate the state using the default validator
		err = self.Validator().ValidateState(block, self.GetBlock(block.ParentHash()), statedb, receipts, usedGas)
		if err != nil {
			reportBlock(block, err)
			return i, err
		}
		// Write state changes to database
		_, err = statedb.Commit()
		if err != nil {
			return i, err
		}

		// coalesce logs for later processing
		coalescedLogs = append(coalescedLogs, logs...)

		if err := WriteBlockReceipts(self.chainDb, block.Hash(), receipts); err != nil {
			return i, err
		}

		txcount += len(block.Transactions())
		// write the block to the chain and get the status
		status, err := self.WriteBlock(block)
		if err != nil {
			return i, err
		}

		switch status {
		case CanonStatTy:
			if glog.V(logger.Debug) {
				glog.Infof("[%v] inserted block #%d (%d TXs %v G %d UNCs) (%x...). Took %v\n", time.Now().UnixNano(), block.Number(), len(block.Transactions()), block.GasUsed(), len(block.Uncles()), block.Hash().Bytes()[0:4], time.Since(bstart))
			}
			events = append(events, ChainEvent{block, block.Hash(), logs})

			// This puts transactions in a extra db for rpc
			if err := WriteTransactions(self.chainDb, block); err != nil {
				return i, err
			}
			// store the receipts
			if err := WriteReceipts(self.chainDb, receipts); err != nil {
				return i, err
			}
			// Write map map bloom filters
			if err := WriteMipmapBloom(self.chainDb, block.NumberU64(), receipts); err != nil {
				return i, err
			}
		case SideStatTy:
			if glog.V(logger.Detail) {
				glog.Infof("inserted forked block #%d (TD=%v) (%d TXs %d UNCs) (%x...). Took %v\n", block.Number(), block.Difficulty(), len(block.Transactions()), len(block.Uncles()), block.Hash().Bytes()[0:4], time.Since(bstart))
			}
			events = append(events, ChainSideEvent{block, logs})

		case SplitStatTy:
			events = append(events, ChainSplitEvent{block, logs})
		}
		stats.processed++
	}

	if (stats.queued > 0 || stats.processed > 0 || stats.ignored > 0) && bool(glog.V(logger.Info)) {
		tend := time.Since(tstart)
		start, end := chain[0], chain[len(chain)-1]
		glog.Infof("imported %d block(s) (%d queued %d ignored) including %d txs in %v. #%v [%x / %x]\n", stats.processed, stats.queued, stats.ignored, txcount, tend, end.Number(), start.Hash().Bytes()[:4], end.Hash().Bytes()[:4])
	}
	go self.postChainEvents(events, coalescedLogs)

	return 0, nil
}