412 lines
15 KiB
Nim
412 lines
15 KiB
Nim
# 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/[options, sets, strformat, tables],
|
|
eth/[keys],
|
|
../../stateless/[witness_from_tree, witness_types],
|
|
../db/accounts_cache,
|
|
../common/[common, evmforks],
|
|
./async/data_sources,
|
|
./interpreter/[op_codes, gas_costs],
|
|
./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: TracerRef,
|
|
asyncFactory: AsyncOperationFactory = AsyncOperationFactory(maybeDataSource: none[AsyncDataSource]()))
|
|
{.gcsafe.} =
|
|
## Initialisation helper
|
|
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 `$`*(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
|
|
tracer: TracerRef = nil): 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, parent.stateRoot, com.pruneTrie),
|
|
parent = parent,
|
|
timestamp = timestamp,
|
|
gasLimit = gasLimit,
|
|
fee = fee,
|
|
prevRandao = prevRandao,
|
|
difficulty = difficulty,
|
|
miner = miner,
|
|
com = com,
|
|
tracer = tracer)
|
|
|
|
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, 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
|
|
tracer: TracerRef = nil)
|
|
{.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, 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)
|
|
|
|
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
|
|
tracer: TracerRef = nil): 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,
|
|
tracer = tracer)
|
|
|
|
proc new*(
|
|
T: type BaseVMState;
|
|
header: BlockHeader; ## header with tx environment data fields
|
|
com: CommonRef; ## block chain config
|
|
tracer: TracerRef = nil): 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,
|
|
tracer = tracer)
|
|
|
|
proc init*(
|
|
vmState: BaseVMState;
|
|
header: BlockHeader; ## header with tx environment data fields
|
|
com: CommonRef; ## block chain config
|
|
tracer: TracerRef = nil): 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,
|
|
tracer = tracer)
|
|
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;
|
|
tracer: TracerRef = nil): bool
|
|
{.gcsafe, raises: [CatchableError].} =
|
|
vmState.init(
|
|
ac = AccountsCache.init(com.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)
|
|
|
|
proc readOnlyStateDB*(vmState: BaseVMState): ReadOnlyStateDB {.inline.} =
|
|
ReadOnlyStateDB(vmState.stateDB)
|
|
|
|
template mutateStateDB*(vmState: BaseVMState, body: untyped) =
|
|
block:
|
|
var db {.inject.} = vmState.stateDB
|
|
body
|
|
|
|
proc getAndClearLogEntries*(vmState: BaseVMState): seq[Log] =
|
|
vmState.stateDB.getAndClearLogEntries()
|
|
|
|
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, 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)
|
|
|
|
func tracingEnabled*(vmState: BaseVMState): bool =
|
|
vmState.tracer.isNil.not
|
|
|
|
proc captureTxStart*(vmState: BaseVMState, gasLimit: GasInt) =
|
|
if vmState.tracingEnabled:
|
|
vmState.tracer.captureTxStart(gasLimit)
|
|
|
|
proc captureTxEnd*(vmState: BaseVMState, restGas: GasInt) =
|
|
if vmState.tracingEnabled:
|
|
vmState.tracer.captureTxEnd(restGas)
|
|
|
|
proc captureStart*(vmState: BaseVMState, comp: Computation,
|
|
sender: EthAddress, to: EthAddress,
|
|
create: bool, input: openArray[byte],
|
|
gasLimit: GasInt, value: UInt256) =
|
|
if vmState.tracingEnabled:
|
|
vmState.tracer.captureStart(comp, sender, to, create, input, gasLimit, value)
|
|
|
|
proc captureEnd*(vmState: BaseVMState, comp: Computation, output: openArray[byte],
|
|
gasUsed: GasInt, error: Option[string]) =
|
|
if vmState.tracingEnabled:
|
|
vmState.tracer.captureEnd(comp, output, gasUsed, error)
|
|
|
|
proc captureEnter*(vmState: BaseVMState, comp: Computation, op: Op,
|
|
sender: EthAddress, to: EthAddress,
|
|
input: openArray[byte], gasLimit: GasInt,
|
|
value: UInt256) =
|
|
if vmState.tracingEnabled:
|
|
vmState.tracer.captureEnter(comp, op, sender, to, input, gasLimit, value)
|
|
|
|
proc captureExit*(vmState: BaseVMState, comp: Computation, output: openArray[byte],
|
|
gasUsed: GasInt, error: Option[string]) =
|
|
if vmState.tracingEnabled:
|
|
vmState.tracer.captureExit(comp, output, gasUsed, error)
|
|
|
|
proc captureOpStart*(vmState: BaseVMState, comp: Computation, pc: int,
|
|
op: Op, gas: GasInt,
|
|
depth: int): int =
|
|
if vmState.tracingEnabled:
|
|
let fixed = vmState.gasCosts[op].kind == GckFixed
|
|
result = vmState.tracer.captureOpStart(comp, fixed, pc, op, gas, depth)
|
|
|
|
proc captureGasCost*(vmState: BaseVMState,
|
|
comp: Computation,
|
|
op: Op, gasCost: GasInt, gasRemaining: GasInt,
|
|
depth: int) =
|
|
if vmState.tracingEnabled:
|
|
let fixed = vmState.gasCosts[op].kind == GckFixed
|
|
vmState.tracer.captureGasCost(comp, fixed, op, gasCost, gasRemaining, depth)
|
|
|
|
proc captureOpEnd*(vmState: BaseVMState, comp: Computation, pc: int,
|
|
op: Op, gas: GasInt, refund: GasInt,
|
|
rData: openArray[byte],
|
|
depth: int, opIndex: int) =
|
|
if vmState.tracingEnabled:
|
|
let fixed = vmState.gasCosts[op].kind == GckFixed
|
|
vmState.tracer.captureOpEnd(comp, fixed, pc, op, gas, refund, rData, depth, opIndex)
|
|
|
|
proc captureFault*(vmState: BaseVMState, comp: Computation, pc: int,
|
|
op: Op, gas: GasInt, refund: GasInt,
|
|
rData: openArray[byte],
|
|
depth: int, error: Option[string]) =
|
|
if vmState.tracingEnabled:
|
|
let fixed = vmState.gasCosts[op].kind == GckFixed
|
|
vmState.tracer.captureFault(comp, fixed, pc, op, gas, refund, rData, depth, error)
|
|
|
|
proc capturePrepare*(vmState: BaseVMState, comp: Computation, depth: int) =
|
|
if vmState.tracingEnabled:
|
|
vmState.tracer.capturePrepare(comp, depth)
|