63 lines
2.0 KiB
Nim
63 lines
2.0 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 http://www.apache.org/licenses/LICENSE-2.0)
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# * MIT license ([LICENSE-MIT](LICENSE-MIT) or http://opensource.org/licenses/MIT)
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# at your option. This file may not be copied, modified, or distributed except according to those terms.
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when not defined(vm2_enabled):
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{.fatal: "Flags \"vm2_enabled\" must be defined"}
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when defined(evmc_enabled):
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{.fatal: "Flags \"evmc_enabled\" and \"vm2_enabled\" are mutually exclusive"}
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import
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options, sets,
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eth/common, chronicles, ../db/accounts_cache,
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../transaction,
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./v2computation, ./v2interpreter, ./v2state, ./v2types
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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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