nimbus-eth1/nimbus/evm/state_transactions.nim

77 lines
2.3 KiB
Nim

# Nimbus
# Copyright (c) 2018 Status Research & Development GmbH
# Licensed under either of
# * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
# http://www.apache.org/licenses/LICENSE-2.0)
# * MIT license ([LICENSE-MIT](LICENSE-MIT) or
# http://opensource.org/licenses/MIT)
# at your option. This file may not be copied, modified, or distributed except
# according to those terms.
import
../constants,
../db/accounts_cache,
../transaction,
./computation,
./interpreter_dispatch,
./interpreter/[gas_costs, gas_meter],
./message,
./state,
./types,
chronicles,
chronos,
eth/common/eth_types,
sets
proc setupTxContext*(vmState: BaseVMState, origin: EthAddress, gasPrice: GasInt, forkOverride=none(EVMFork)) =
## this proc will be called each time a new transaction
## is going to be executed
vmState.txOrigin = origin
vmState.txGasPrice = gasPrice
vmState.fork =
if forkOverride.isSome:
forkOverride.get
else:
vmState.com.toEVMFork(vmState.blockNumber)
vmState.gasCosts = vmState.fork.forkToSchedule
proc refundGas*(c: Computation, tx: Transaction, sender: EthAddress) =
let maxRefund = (tx.gasLimit - c.gasMeter.gasRemaining) div 2
c.gasMeter.returnGas min(c.getGasRefund(), maxRefund)
c.vmState.mutateStateDB:
db.addBalance(sender, c.gasMeter.gasRemaining.u256 * tx.gasPrice.u256)
# FIXME-awkwardFactoring: the factoring out of the pre and
# post parts feels awkward to me, but for now I'd really like
# not to have too much duplicated code between sync and async.
# --Adam
proc preExecComputation(c: Computation) =
if not c.msg.isCreate:
c.vmState.mutateStateDB:
db.incNonce(c.msg.sender)
proc postExecComputation(c: Computation) =
if c.isSuccess:
if c.fork < FkLondon:
# EIP-3529: Reduction in refunds
c.refundSelfDestruct()
shallowCopy(c.vmState.selfDestructs, c.selfDestructs)
shallowCopy(c.vmState.logEntries, c.logEntries)
c.vmState.touchedAccounts.incl c.touchedAccounts
c.vmState.status = c.isSuccess
proc execComputation*(c: Computation) =
c.preExecComputation()
c.execCallOrCreate()
c.postExecComputation()
# FIXME-duplicatedForAsync
proc asyncExecComputation*(c: Computation): Future[void] {.async.} =
c.preExecComputation()
await c.asyncExecCallOrCreate()
c.postExecComputation()