135 lines
4.6 KiB
Nim
135 lines
4.6 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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macros, strformat, tables, sets, options,
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eth/common,
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vm/interpreter/[vm_forks, gas_costs],
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./constants, ./db/[db_chain, state_db],
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./utils, json, vm_types, vm/transaction_tracer
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proc newAccessLogs*: AccessLogs =
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AccessLogs(reads: initTable[string, string](), writes: initTable[string, string]())
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proc update*[K, V](t: var Table[K, V], elements: Table[K, V]) =
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for k, v in elements:
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t[k] = v
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proc `$`*(vmState: BaseVMState): string =
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if vmState.isNil:
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result = "nil"
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else:
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result = &"VMState {vmState.name}:\n header: {vmState.blockHeader}\n chaindb: {vmState.chaindb}"
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proc init*(self: BaseVMState, prevStateRoot: Hash256, header: BlockHeader,
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chainDB: BaseChainDB, tracerFlags: set[TracerFlags] = {}) =
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self.prevHeaders = @[]
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self.name = "BaseVM"
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self.accessLogs = newAccessLogs()
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self.blockHeader = header
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self.chaindb = chainDB
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self.tracer.initTracer(tracerFlags)
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self.tracingEnabled = TracerFlags.EnableTracing in tracerFlags
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self.logEntries = @[]
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self.accountDb = newAccountStateDB(chainDB.db, prevStateRoot, chainDB.pruneTrie)
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self.touchedAccounts = initHashSet[EthAddress]()
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proc newBaseVMState*(prevStateRoot: Hash256, header: BlockHeader,
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chainDB: BaseChainDB, tracerFlags: set[TracerFlags] = {}): BaseVMState =
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new result
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result.init(prevStateRoot, header, chainDB, tracerFlags)
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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.blockHeader.blockNumber.toFork
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vmState.gasCosts = vmState.fork.forkToSchedule
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method blockhash*(vmState: BaseVMState): Hash256 {.base, gcsafe.} =
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vmState.blockHeader.hash
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method coinbase*(vmState: BaseVMState): EthAddress {.base, gcsafe.} =
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vmState.blockHeader.coinbase
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method timestamp*(vmState: BaseVMState): EthTime {.base, gcsafe.} =
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vmState.blockHeader.timestamp
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method blockNumber*(vmState: BaseVMState): BlockNumber {.base, gcsafe.} =
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# it should return current block number
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# and not head.blockNumber
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vmState.blockHeader.blockNumber
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method difficulty*(vmState: BaseVMState): UInt256 {.base, gcsafe.} =
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vmState.blockHeader.difficulty
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method gasLimit*(vmState: BaseVMState): GasInt {.base, gcsafe.} =
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vmState.blockHeader.gasLimit
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method getAncestorHash*(vmState: BaseVMState, blockNumber: BlockNumber): Hash256 {.base, gcsafe.} =
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var ancestorDepth = vmState.blockHeader.blockNumber - blockNumber - 1
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if ancestorDepth >= constants.MAX_PREV_HEADER_DEPTH:
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return
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if blockNumber >= vmState.blockHeader.blockNumber:
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return
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result = vmState.chainDB.getBlockHash(blockNumber)
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#TODO: should we use deque here?
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# someday we may revive this code when
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# we already have working miner
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when false:
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let idx = ancestorDepth.toInt
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if idx >= vmState.prevHeaders.len:
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return
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var header = vmState.prevHeaders[idx]
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result = header.hash
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proc readOnlyStateDB*(vmState: BaseVMState): ReadOnlyStateDB {.inline.} =
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ReadOnlyStateDB(vmState.accountDb)
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template mutateStateDB*(vmState: BaseVMState, body: untyped) =
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block:
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var db {.inject.} = vmState.accountDb
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body
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proc getTracingResult*(vmState: BaseVMState): JsonNode =
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doAssert(vmState.tracingEnabled)
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vmState.tracer.trace
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proc addLogs*(vmState: BaseVMState, logs: seq[Log]) =
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shallowCopy(vmState.logEntries, logs)
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proc getAndClearLogEntries*(vmState: BaseVMState): seq[Log] =
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shallowCopy(result, vmState.logEntries)
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vmState.logEntries = @[]
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proc enableTracing*(vmState: BaseVMState) =
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vmState.tracingEnabled = true
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proc disableTracing*(vmState: BaseVMState) =
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vmState.tracingEnabled = false
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iterator tracedAccounts*(vmState: BaseVMState): EthAddress =
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for acc in vmState.tracer.accounts:
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yield acc
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iterator tracedAccountsPairs*(vmState: BaseVMState): (int, EthAddress) =
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var idx = 0
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for acc in vmState.tracer.accounts:
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yield (idx, acc)
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inc idx
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proc removeTracedAccounts*(vmState: BaseVMState, accounts: varargs[EthAddress]) =
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for acc in accounts:
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vmState.tracer.accounts.excl acc
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