mirror of
https://github.com/status-im/nimbus-eth1.git
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104 lines
2.9 KiB
Nim
104 lines
2.9 KiB
Nim
# Nimbus
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# Copyright (c) 2018 Status Research & Development GmbH
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# Licensed under either of
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# * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
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# http://www.apache.org/licenses/LICENSE-2.0)
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# * MIT license ([LICENSE-MIT](LICENSE-MIT) or
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# http://opensource.org/licenses/MIT)
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# at your option. This file may not be copied, modified, or distributed except
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# according to those terms.
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const
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# needed for compiling locally
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kludge {.intdefine.}: int = 0
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breakCircularDependency {.used.} = kludge > 0
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import
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../transaction,
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./interpreter,
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chronicles,
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eth/common/eth_types,
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options,
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sets
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# ------------------------------------------------------------------------------
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# Kludge BEGIN
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# ------------------------------------------------------------------------------
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when not breakCircularDependency:
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import
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../config,
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../constants,
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../db/accounts_cache,
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./computation,
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./interpreter/gas_costs,
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./state,
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./types,
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eth/common
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else:
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import
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./interpreter/op_handlers/oph_kludge
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# ------------------------------------------------------------------------------
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# Kludge END
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# ------------------------------------------------------------------------------
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proc setupTxContext*(vmState: BaseVMState, origin: EthAddress, gasPrice: GasInt, forkOverride=none(Fork)) =
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## this proc will be called each time a new transaction
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## is going to be executed
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vmState.txOrigin = origin
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vmState.txGasPrice = gasPrice
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vmState.fork =
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if forkOverride.isSome:
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forkOverride.get
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else:
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vmState.chainDB.config.toFork(vmState.blockHeader.blockNumber)
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vmState.gasCosts = vmState.fork.forkToSchedule
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proc setupComputation*(vmState: BaseVMState, tx: Transaction, sender: EthAddress, fork: Fork) : Computation =
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var gas = tx.gasLimit - tx.intrinsicGas(fork)
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assert gas >= 0
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vmState.setupTxContext(
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origin = sender,
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gasPrice = tx.gasPrice,
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forkOverride = some(fork)
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)
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let msg = Message(
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kind: if tx.isContractCreation: evmcCreate else: evmcCall,
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depth: 0,
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gas: gas,
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sender: sender,
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contractAddress: tx.getRecipient(),
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codeAddress: tx.to,
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value: tx.value,
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data: tx.payload
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)
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result = newComputation(vmState, msg)
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doAssert result.isOriginComputation
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proc execComputation*(c: Computation) =
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if not c.msg.isCreate:
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c.vmState.mutateStateDB:
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db.incNonce(c.msg.sender)
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c.execCallOrCreate()
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if c.isSuccess:
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c.refundSelfDestruct()
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shallowCopy(c.vmState.suicides, c.suicides)
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shallowCopy(c.vmState.logEntries, c.logEntries)
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c.vmState.touchedAccounts.incl c.touchedAccounts
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c.vmstate.status = c.isSuccess
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proc refundGas*(c: Computation, tx: Transaction, sender: EthAddress) =
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let maxRefund = (tx.gasLimit - c.gasMeter.gasRemaining) div 2
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c.gasMeter.returnGas min(c.getGasRefund(), maxRefund)
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c.vmState.mutateStateDB:
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db.addBalance(sender, c.gasMeter.gasRemaining.u256 * tx.gasPrice.u256)
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