61 lines
1.9 KiB
Nim
61 lines
1.9 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.
|
|
|
|
when defined(evmc_enabled):
|
|
{.fatal: "Flags \"evmc_enabled\" and \"vm2_enabled\" are mutually exclusive"}
|
|
|
|
import
|
|
options, sets,
|
|
eth/common, chronicles, ../db/accounts_cache,
|
|
../transaction,
|
|
./v2computation, ./v2interpreter, ./v2state, ./v2types
|
|
|
|
proc setupComputation*(vmState: BaseVMState, tx: Transaction, sender: EthAddress, fork: Fork) : Computation =
|
|
var gas = tx.gasLimit - tx.intrinsicGas(fork)
|
|
assert gas >= 0
|
|
|
|
vmState.setupTxContext(
|
|
origin = sender,
|
|
gasPrice = tx.gasPrice,
|
|
forkOverride = some(fork)
|
|
)
|
|
|
|
let msg = Message(
|
|
kind: if tx.isContractCreation: evmcCreate else: evmcCall,
|
|
depth: 0,
|
|
gas: gas,
|
|
sender: sender,
|
|
contractAddress: tx.getRecipient(),
|
|
codeAddress: tx.to,
|
|
value: tx.value,
|
|
data: tx.payload
|
|
)
|
|
|
|
result = newComputation(vmState, msg)
|
|
doAssert result.isOriginComputation
|
|
|
|
proc execComputation*(c: Computation) =
|
|
if not c.msg.isCreate:
|
|
c.vmState.mutateStateDB:
|
|
db.incNonce(c.msg.sender)
|
|
|
|
c.execCallOrCreate()
|
|
|
|
if c.isSuccess:
|
|
c.refundSelfDestruct()
|
|
shallowCopy(c.vmState.suicides, c.suicides)
|
|
shallowCopy(c.vmState.logEntries, c.logEntries)
|
|
c.vmState.touchedAccounts.incl c.touchedAccounts
|
|
|
|
c.vmstate.status = c.isSuccess
|
|
|
|
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)
|