160 lines
6.1 KiB
Nim
160 lines
6.1 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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import
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ranges/typedranges, sequtils, strformat, tables, options,
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eth/common, chronicles, ./db/[db_chain, state_db],
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constants, errors, transaction, vm_types, vm_state, utils,
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./vm/[computation, interpreter], ./vm/interpreter/gas_costs
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proc validateTransaction*(vmState: BaseVMState, transaction: Transaction, sender: EthAddress): bool =
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# XXX: https://github.com/status-im/nimbus/issues/35#issuecomment-391726518
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# XXX: lots of avoidable u256 construction
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var readOnlyDB = vmState.readOnlyStateDB
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let limitAndValue = transaction.gasLimit.u256 + transaction.value
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let gasCost = transaction.gasLimit.u256 * transaction.gasPrice.u256
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transaction.gasLimit >= transaction.intrinsicGas and
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#transaction.gasPrice <= (1 shl 34) and
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limitAndValue <= readOnlyDB.getBalance(sender) and
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transaction.accountNonce == readOnlyDB.getNonce(sender) and
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readOnlyDB.getBalance(sender) >= gasCost
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proc setupComputation*(vmState: BaseVMState, tx: Transaction, sender, recipient: EthAddress, forkOverride=none(Fork)) : BaseComputation =
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let fork =
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if forkOverride.isSome:
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forkOverride.get
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else:
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vmState.blockNumber.toFork
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var gas = tx.gasLimit - tx.intrinsicGas
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# TODO: refactor message to use byterange
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# instead of seq[byte]
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var data, code: seq[byte]
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if tx.isContractCreation:
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gas = gas - gasFees[fork][GasTXCreate]
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data = @[]
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code = tx.payload
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else:
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data = tx.payload
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code = vmState.readOnlyStateDB.getCode(tx.to).toSeq
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if gas < 0:
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debug "not enough gas to perform calculation", gas=gas
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return
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let msg = newMessage(
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gas = gas,
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gasPrice = tx.gasPrice,
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to = tx.to,
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sender = sender,
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value = tx.value,
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data = data,
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code = code,
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options = newMessageOptions(origin = sender,
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createAddress = recipient))
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result = newBaseComputation(vmState, vmState.blockNumber, msg, forkOverride)
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doAssert result.isOriginComputation
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proc execComputation*(computation: var BaseComputation): bool =
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if computation.msg.isCreate:
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result = computation.applyMessage(Create)
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else:
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result = computation.applyMessage(Call)
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computation.vmState.mutateStateDB:
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var suicidedCount = 0
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for deletedAccount in computation.accountsForDeletion:
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db.deleteAccount deletedAccount
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inc suicidedCount
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# FIXME: hook this into actual RefundSelfDestruct
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const RefundSelfDestruct = 24_000
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computation.gasMeter.refundGas(RefundSelfDestruct * suicidedCount)
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if result:
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computation.vmState.addLogs(computation.logEntries)
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else:
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if computation.tracingEnabled: computation.traceError()
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proc refundGas*(computation: BaseComputation, tx: Transaction, sender: EthAddress): GasInt =
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let
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gasRemaining = computation.gasMeter.gasRemaining
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gasRefunded = computation.getGasRefund()
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gasUsed = tx.gasLimit - gasRemaining
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gasRefund = min(gasRefunded, gasUsed div 2)
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computation.vmState.mutateStateDB:
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db.addBalance(sender, (gasRemaining + gasRefund).u256 * tx.gasPrice.u256)
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result = gasUsed - gasRefund
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#[
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method executeTransaction(vmState: BaseVMState, transaction: Transaction): (BaseComputation, BlockHeader) {.base.}=
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# Execute the transaction in the vm
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# TODO: introduced here: https://github.com/ethereum/py-evm/commit/21c57f2d56ab91bb62723c3f9ebe291d0b132dde
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# Refactored/Removed here: https://github.com/ethereum/py-evm/commit/cc991bf
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# Deleted here: https://github.com/ethereum/py-evm/commit/746defb6f8e83cee2c352a0ab8690e1281c4227c
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raise newException(ValueError, "Must be implemented by subclasses")
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method addTransaction*(vmState: BaseVMState, transaction: Transaction, computation: BaseComputation, b: Block): (Block, Table[string, string]) =
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# Add a transaction to the given block and
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# return `trieData` to store the transaction data in chaindb in VM layer
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# Update the bloomFilter, transaction trie and receipt trie roots, bloom_filter,
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# bloom, and usedGas of the block
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# transaction: the executed transaction
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# computation: the Computation object with executed result
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# block: the Block which the transaction is added in
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# var receipt = vmState.makeReceipt(transaction, computation)
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# vmState.add_receipt(receipt)
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# block.transactions.append(transaction)
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# # Get trie roots and changed key-values.
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# tx_root_hash, tx_kv_nodes = make_trie_root_and_nodes(block.transactions)
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# receipt_root_hash, receipt_kv_nodes = make_trie_root_and_nodes(self.receipts)
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# trie_data = merge(tx_kv_nodes, receipt_kv_nodes)
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# block.bloom_filter |= receipt.bloom
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# block.header.transaction_root = tx_root_hash
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# block.header.receipt_root = receipt_root_hash
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# block.header.bloom = int(block.bloom_filter)
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# block.header.gas_used = receipt.gas_used
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# return block, trie_data
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result = (b, initTable[string, string]())
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method applyTransaction*(
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vmState: BaseVMState,
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transaction: Transaction,
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b: Block,
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isStateless: bool): (BaseComputation, Block, Table[string, string]) =
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# Apply transaction to the given block
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# transaction: the transaction need to be applied
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# b: the block which the transaction applies on
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# isStateless: if isStateless, call vmState.addTransaction to set block
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if isStateless:
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var ourBlock = b # deepcopy
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vmState.blockHeader = b.header
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var (computation, blockHeader) = vmState.executeTransaction(transaction)
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ourBlock.header = blockHeader
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var trieData: Table[string, string]
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(ourBlock, trieData) = vmState.addTransaction(transaction, computation, ourBlock)
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result = (computation, ourBlock, trieData)
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else:
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var (computation, blockHeader) = vmState.executeTransaction(transaction)
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return (computation, nil, initTable[string, string]())
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]# |