nimbus-eth1/nimbus/p2p/executor.nim

181 lines
6.1 KiB
Nim

import options, sets,
eth/[common, bloom], stew/ranges, chronicles, nimcrypto,
../db/[db_chain, state_db],
../utils, ../constants, ../transaction,
../vm_state, ../vm_types, ../vm_state_transactions,
../vm/[computation, message],
../vm/interpreter/vm_forks,
./dao
proc processTransaction*(tx: Transaction, sender: EthAddress, vmState: BaseVMState, fork: Fork): GasInt =
## Process the transaction, write the results to db.
## Returns amount of ETH to be rewarded to miner
trace "Sender", sender
trace "txHash", rlpHash = tx.rlpHash
if fork >= FkSpurious:
vmState.touchedAccounts.incl(vmState.blockHeader.coinbase)
var gasUsed = tx.gasLimit
block:
if vmState.cumulativeGasUsed + gasUsed > vmState.blockHeader.gasLimit:
debug "invalid tx: block header gasLimit reached",
blockGasLimit=vmState.blockHeader.gasLimit,
gasUsed=gasUsed,
txGasLimit=tx.gasLimit
gasUsed = 0
break
let upfrontGasCost = tx.gasLimit.u256 * tx.gasPrice.u256
var balance = vmState.readOnlyStateDb().getBalance(sender)
if balance < upfrontGasCost: break
let recipient = tx.getRecipient()
let isCollision = vmState.readOnlyStateDb().hasCodeOrNonce(recipient)
var computation = setupComputation(vmState, tx, sender, recipient, fork)
if computation.isNil: # OOG in setupComputation
gasUsed = 0
break
vmState.mutateStateDB:
db.incNonce(sender)
db.subBalance(sender, upfrontGasCost)
if tx.isContractCreation and isCollision: break
execComputation(computation)
if not computation.shouldBurnGas:
gasUsed = computation.refundGas(tx, sender)
if computation.isSuicided(vmState.blockHeader.coinbase):
gasUsed = 0
vmState.cumulativeGasUsed += gasUsed
# miner fee
let txFee = gasUsed.u256 * tx.gasPrice.u256
vmState.mutateStateDB:
db.addBalance(vmState.blockHeader.coinbase, txFee)
# EIP158 state clearing
for account in vmState.touchedAccounts:
if db.accountExists(account) and db.isEmptyAccount(account):
debug "state clearing", account
db.deleteAccount(account)
result = gasUsed
type
# TODO: these types need to be removed
# once eth/bloom and eth/common sync'ed
Bloom = common.BloomFilter
LogsBloom = bloom.BloomFilter
# TODO: move these three receipt procs below somewhere else more appropriate
func logsBloom(logs: openArray[Log]): LogsBloom =
for log in logs:
result.incl log.address
for topic in log.topics:
result.incl topic
func createBloom*(receipts: openArray[Receipt]): Bloom =
var bloom: LogsBloom
for receipt in receipts:
bloom.value = bloom.value or logsBloom(receipt.logs).value
result = bloom.value.toByteArrayBE
proc makeReceipt(vmState: BaseVMState, fork = FkFrontier): Receipt =
if fork < FkByzantium:
result.stateRootOrStatus = hashOrStatus(vmState.accountDb.rootHash)
else:
result.stateRootOrStatus = hashOrStatus(vmState.status)
result.cumulativeGasUsed = vmState.cumulativeGasUsed
result.logs = vmState.getAndClearLogEntries()
result.bloom = logsBloom(result.logs).value.toByteArrayBE
func eth(n: int): Uint256 {.compileTime.} =
n.u256 * pow(10.u256, 18)
const
eth5 = 5.eth
eth3 = 3.eth
eth2 = 2.eth
blockRewards: array[Fork, Uint256] = [
eth5, # FkFrontier
eth5, # FkThawing
eth5, # FkHomestead
eth5, # FkDao
eth5, # FkTangerine
eth5, # FkSpurious
eth3, # FkByzantium
eth2 # FkConstantinople
]
proc processBlock*(chainDB: BaseChainDB, header: BlockHeader, body: BlockBody, vmState: BaseVMState): ValidationResult =
if chainDB.config.daoForkSupport and header.blockNumber == chainDB.config.daoForkBlock:
vmState.mutateStateDB:
db.applyDAOHardFork()
if body.transactions.calcTxRoot != header.txRoot:
debug "Mismatched txRoot", blockNumber=header.blockNumber
return ValidationResult.Error
let fork = vmState.blockNumber.toFork
if header.txRoot != BLANK_ROOT_HASH:
if body.transactions.len == 0:
debug "No transactions in body", blockNumber=header.blockNumber
return ValidationResult.Error
else:
trace "Has transactions", blockNumber = header.blockNumber, blockHash = header.blockHash
vmState.receipts = newSeq[Receipt](body.transactions.len)
vmState.cumulativeGasUsed = 0
for txIndex, tx in body.transactions:
var sender: EthAddress
if tx.getSender(sender):
let gasUsed = processTransaction(tx, sender, vmState, fork)
else:
debug "Could not get sender", txIndex, tx
return ValidationResult.Error
vmState.receipts[txIndex] = makeReceipt(vmState, fork)
let blockReward = blockRewards[fork]
var mainReward = blockReward
if header.ommersHash != EMPTY_UNCLE_HASH:
let h = chainDB.persistUncles(body.uncles)
if h != header.ommersHash:
debug "Uncle hash mismatch"
return ValidationResult.Error
for uncle in body.uncles:
var uncleReward = uncle.blockNumber.u256 + 8.u256
uncleReward -= header.blockNumber.u256
uncleReward = uncleReward * blockReward
uncleReward = uncleReward div 8.u256
vmState.mutateStateDB:
db.addBalance(uncle.coinbase, uncleReward)
mainReward += blockReward div 32.u256
# Reward beneficiary
vmState.mutateStateDB:
db.addBalance(header.coinbase, mainReward)
let stateDb = vmState.accountDb
if header.stateRoot != stateDb.rootHash:
error "Wrong state root in block", blockNumber=header.blockNumber, expected=header.stateRoot, actual=stateDb.rootHash, arrivedFrom=chainDB.getCanonicalHead().stateRoot
# this one is a show stopper until we are confident in our VM's
# compatibility with the main chain
return ValidationResult.Error
let bloom = createBloom(vmState.receipts)
if header.bloom != bloom:
debug "wrong bloom in block", blockNumber=header.blockNumber
return ValidationResult.Error
let receiptRoot = calcReceiptRoot(vmState.receipts)
if header.receiptRoot != receiptRoot:
debug "wrong receiptRoot in block", blockNumber=header.blockNumber, actual=receiptRoot, expected=header.receiptRoot
return ValidationResult.Error