# Nimbus # Copyright (c) 2018-2023 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. {.push raises: [].} import std/[json, options, sets, strformat, tables], eth/[keys], ../../stateless/[witness_from_tree, witness_types], ../db/accounts_cache, ../common/[common, evmforks], ./async/data_sources, ./transaction_tracer, ./types proc init( self: BaseVMState; ac: AccountsCache; parent: BlockHeader; timestamp: EthTime; gasLimit: GasInt; fee: Option[UInt256]; prevRandao: Hash256; difficulty: UInt256; miner: EthAddress; com: CommonRef; tracer: TransactionTracer, asyncFactory: AsyncOperationFactory = AsyncOperationFactory(maybeDataSource: none[AsyncDataSource]())) {.gcsafe.} = ## Initialisation helper self.prevHeaders = @[] self.parent = parent self.timestamp = timestamp self.gasLimit = gasLimit self.gasPool = gasLimit self.fee = fee self.prevRandao = prevRandao self.blockDifficulty = difficulty self.com = com self.tracer = tracer self.stateDB = ac self.minerAddress = miner self.asyncFactory = asyncFactory proc init( self: BaseVMState; ac: AccountsCache; parent: BlockHeader; timestamp: EthTime; gasLimit: GasInt; fee: Option[UInt256]; prevRandao: Hash256; difficulty: UInt256; miner: EthAddress; com: CommonRef; tracerFlags: set[TracerFlags]) {.gcsafe.} = var tracer: TransactionTracer tracer.initTracer(tracerFlags) self.init( ac = ac, parent = parent, timestamp = timestamp, gasLimit = gasLimit, fee = fee, prevRandao= prevRandao, difficulty= difficulty, miner = miner, com = com, tracer = tracer) # -------------- proc `$`*(vmState: BaseVMState): string {.gcsafe, raises: [ValueError].} = if vmState.isNil: result = "nil" else: result = &"VMState:"& &"\n blockNumber: {vmState.parent.blockNumber + 1}" proc new*( T: type BaseVMState; parent: BlockHeader; ## parent header, account sync position timestamp: EthTime; ## tx env: time stamp gasLimit: GasInt; ## tx env: gas limit fee: Option[UInt256]; ## tx env: optional base fee prevRandao: Hash256; ## tx env: POS block randomness difficulty: UInt256, ## tx env: difficulty miner: EthAddress; ## tx env: coinbase(PoW) or signer(PoA) com: CommonRef; ## block chain config tracerFlags: set[TracerFlags] = {}): T {.gcsafe.} = ## Create a new `BaseVMState` descriptor from a parent block header. This ## function internally constructs a new account state cache rooted at ## `parent.stateRoot` ## ## This `new()` constructor and its variants (see below) provide a save ## `BaseVMState` environment where the account state cache is synchronised ## with the `parent` block header. new result result.init( ac = AccountsCache.init(com.db.db, parent.stateRoot, com.pruneTrie), parent = parent, timestamp = timestamp, gasLimit = gasLimit, fee = fee, prevRandao = prevRandao, difficulty = difficulty, miner = miner, com = com, tracerFlags = tracerFlags) proc reinit*(self: BaseVMState; ## Object descriptor parent: BlockHeader; ## parent header, account sync pos. timestamp: EthTime; ## tx env: time stamp gasLimit: GasInt; ## tx env: gas limit fee: Option[UInt256]; ## tx env: optional base fee prevRandao:Hash256; ## tx env: POS block randomness difficulty:UInt256, ## tx env: difficulty miner: EthAddress; ## tx env: coinbase(PoW) or signer(PoA) ): bool {.gcsafe.} = ## Re-initialise state descriptor. The `AccountsCache` database is ## re-initilaise only if its `rootHash` doe not point to `parent.stateRoot`, ## already. Accumulated state data are reset. ## ## This function returns `true` unless the `AccountsCache` database could be ## queries about its `rootHash`, i.e. `isTopLevelClean` evaluated `true`. If ## this function returns `false`, the function argument `self` is left ## untouched. if self.stateDB.isTopLevelClean: let tracer = self.tracer com = self.com db = com.db ac = if self.stateDB.rootHash == parent.stateRoot: self.stateDB else: AccountsCache.init(db.db, parent.stateRoot, com.pruneTrie) self[].reset self.init( ac = ac, parent = parent, timestamp = timestamp, gasLimit = gasLimit, fee = fee, prevRandao = prevRandao, difficulty = difficulty, miner = miner, com = com, tracer = tracer) return true # else: false proc reinit*(self: BaseVMState; ## Object descriptor parent: BlockHeader; ## parent header, account sync pos. header: BlockHeader; ## header with tx environment data fields ): bool {.gcsafe, raises: [CatchableError].} = ## Variant of `reinit()`. The `parent` argument is used to sync the accounts ## cache and the `header` is used as a container to pass the `timestamp`, ## `gasLimit`, and `fee` values. ## ## It requires the `header` argument properly initalised so that for PoA ## networks, the miner address is retrievable via `ecRecover()`. result = self.reinit( parent = parent, timestamp = header.timestamp, gasLimit = header.gasLimit, fee = header.fee, prevRandao= header.prevRandao, difficulty= header.difficulty, miner = self.com.minerAddress(header)) proc reinit*(self: BaseVMState; ## Object descriptor header: BlockHeader; ## header with tx environment data fields ): bool {.gcsafe, raises: [CatchableError].} = ## This is a variant of the `reinit()` function above where the field ## `header.parentHash`, is used to fetch the `parent` BlockHeader to be ## used in the `update()` variant, above. var parent: BlockHeader if self.com.db.getBlockHeader(header.parentHash, parent): return self.reinit( parent = parent, header = header) proc init*( self: BaseVMState; ## Object descriptor parent: BlockHeader; ## parent header, account sync position header: BlockHeader; ## header with tx environment data fields com: CommonRef; ## block chain config tracerFlags: set[TracerFlags] = {}) {.gcsafe, raises: [CatchableError].} = ## Variant of `new()` constructor above for in-place initalisation. The ## `parent` argument is used to sync the accounts cache and the `header` ## is used as a container to pass the `timestamp`, `gasLimit`, and `fee` ## values. ## ## It requires the `header` argument properly initalised so that for PoA ## networks, the miner address is retrievable via `ecRecover()`. self.init( ac = AccountsCache.init(com.db.db, parent.stateRoot, com.pruneTrie), parent = parent, timestamp = header.timestamp, gasLimit = header.gasLimit, fee = header.fee, prevRandao = header.prevRandao, difficulty = header.difficulty, miner = com.minerAddress(header), com = com, tracerFlags = tracerFlags) proc new*( T: type BaseVMState; parent: BlockHeader; ## parent header, account sync position header: BlockHeader; ## header with tx environment data fields com: CommonRef; ## block chain config tracerFlags: set[TracerFlags] = {}): T {.gcsafe, raises: [CatchableError].} = ## This is a variant of the `new()` constructor above where the `parent` ## argument is used to sync the accounts cache and the `header` is used ## as a container to pass the `timestamp`, `gasLimit`, and `fee` values. ## ## It requires the `header` argument properly initalised so that for PoA ## networks, the miner address is retrievable via `ecRecover()`. new result result.init( parent = parent, header = header, com = com, tracerFlags = tracerFlags) proc new*( T: type BaseVMState; header: BlockHeader; ## header with tx environment data fields com: CommonRef; ## block chain config tracerFlags: set[TracerFlags] = {}): T {.gcsafe, raises: [CatchableError].} = ## This is a variant of the `new()` constructor above where the field ## `header.parentHash`, is used to fetch the `parent` BlockHeader to be ## used in the `new()` variant, above. BaseVMState.new( parent = com.db.getBlockHeader(header.parentHash), header = header, com = com, tracerFlags = tracerFlags) proc init*( vmState: BaseVMState; header: BlockHeader; ## header with tx environment data fields com: CommonRef; ## block chain config tracerFlags: set[TracerFlags] = {}): bool {.gcsafe, raises: [CatchableError].} = ## Variant of `new()` which does not throw an exception on a dangling ## `BlockHeader` parent hash reference. var parent: BlockHeader if com.db.getBlockHeader(header.parentHash, parent): vmState.init( parent = parent, header = header, com = com, tracerFlags = tracerFlags) return true proc statelessInit*( vmState: BaseVMState; parent: BlockHeader; ## parent header, account sync position header: BlockHeader; ## header with tx environment data fields com: CommonRef; ## block chain config asyncFactory: AsyncOperationFactory; tracerFlags: set[TracerFlags] = {}): bool {.gcsafe, raises: [CatchableError].} = var tracer: TransactionTracer tracer.initTracer(tracerFlags) vmState.init( ac = AccountsCache.init(com.db.db, parent.stateRoot, com.pruneTrie), parent = parent, timestamp = header.timestamp, gasLimit = header.gasLimit, fee = header.fee, prevRandao = header.prevRandao, difficulty = header.difficulty, miner = com.minerAddress(header), com = com, tracer = tracer, asyncFactory = asyncFactory) return true method coinbase*(vmState: BaseVMState): EthAddress {.base, gcsafe.} = vmState.minerAddress method blockNumber*(vmState: BaseVMState): BlockNumber {.base, gcsafe.} = # it should return current block number # and not head.blockNumber vmState.parent.blockNumber + 1 method difficulty*(vmState: BaseVMState): UInt256 {.base, gcsafe.} = if vmState.com.consensus == ConsensusType.POS: # EIP-4399/EIP-3675 UInt256.fromBytesBE(vmState.prevRandao.data, allowPadding = false) else: vmState.blockDifficulty method baseFee*(vmState: BaseVMState): UInt256 {.base, gcsafe.} = if vmState.fee.isSome: vmState.fee.get else: 0.u256 when defined(geth): import db/geth_db method getAncestorHash*( vmState: BaseVMState, blockNumber: BlockNumber): Hash256 {.base, gcsafe, raises: [CatchableError].} = let db = vmState.com.db when defined(geth): result = db.headerHash(blockNumber.truncate(uint64)) else: result = db.getBlockHash(blockNumber) #TODO: should we use deque here? # someday we may revive this code when # we already have working miner when false: let idx = ancestorDepth.toInt if idx >= vmState.prevHeaders.len: return var header = vmState.prevHeaders[idx] result = header.hash proc readOnlyStateDB*(vmState: BaseVMState): ReadOnlyStateDB {.inline.} = ReadOnlyStateDB(vmState.stateDB) template mutateStateDB*(vmState: BaseVMState, body: untyped) = block: var db {.inject.} = vmState.stateDB body proc getTracingResult*(vmState: BaseVMState): JsonNode {.inline.} = doAssert(EnableTracing in vmState.tracer.flags) vmState.tracer.trace proc getAndClearLogEntries*(vmState: BaseVMState): seq[Log] = vmState.stateDB.getAndClearLogEntries() proc enableTracing*(vmState: BaseVMState) = vmState.tracer.flags.incl EnableTracing proc disableTracing*(vmState: BaseVMState) = vmState.tracer.flags.excl EnableTracing func tracingEnabled*(vmState: BaseVMState): bool = EnableTracing in vmState.tracer.flags iterator tracedAccounts*(vmState: BaseVMState): EthAddress = for acc in vmState.tracer.accounts: yield acc iterator tracedAccountsPairs*(vmState: BaseVMState): (int, EthAddress) = var idx = 0 for acc in vmState.tracer.accounts: yield (idx, acc) inc idx proc removeTracedAccounts*(vmState: BaseVMState, accounts: varargs[EthAddress]) = for acc in accounts: vmState.tracer.accounts.excl acc proc tracerGasUsed*(vmState: BaseVMState, gasUsed: GasInt) = vmState.tracer.gasUsed = gasUsed proc tracerGasUsed*(vmState: BaseVMState): GasInt = vmState.tracer.gasUsed proc status*(vmState: BaseVMState): bool = ExecutionOK in vmState.flags proc `status=`*(vmState: BaseVMState, status: bool) = if status: vmState.flags.incl ExecutionOK else: vmState.flags.excl ExecutionOK proc generateWitness*(vmState: BaseVMState): bool = GenerateWitness in vmState.flags proc `generateWitness=`*(vmState: BaseVMState, status: bool) = if status: vmState.flags.incl GenerateWitness else: vmState.flags.excl GenerateWitness proc buildWitness*(vmState: BaseVMState): seq[byte] {.raises: [CatchableError].} = let rootHash = vmState.stateDB.rootHash let mkeys = vmState.stateDB.makeMultiKeys() let flags = if vmState.fork >= FkSpurious: {wfEIP170} else: {} # build witness from tree var wb = initWitnessBuilder(vmState.com.db.db, rootHash, flags) wb.buildWitness(mkeys) func forkDeterminationInfoForVMState*(vmState: BaseVMState): ForkDeterminationInfo = # FIXME-Adam: Is this timestamp right? Note that up above in blockNumber we add 1; # should timestamp be adding 12 or something? # Also, can I get the TD? Do I need to? forkDeterminationInfo(vmState.blockNumber, vmState.timestamp) func determineFork*(vmState: BaseVMState): EVMFork = vmState.com.toEVMFork(vmState.forkDeterminationInfoForVMState)