nimbus-eth1/nimbus/db/access_list.nim

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# Nimbus
# Copyright (c) 2023-2024 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.
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import
std/[tables, sets],
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stint,
eth/common
type
SlotSet = HashSet[UInt256]
AccessList* = object
slots: Table[EthAddress, SlotSet]
# ------------------------------------------------------------------------------
# Private helpers
# ------------------------------------------------------------------------------
func toStorageKeys(slots: SlotSet): seq[StorageKey] =
for slot in slots:
result.add slot.toBytesBE
# ------------------------------------------------------------------------------
# Public constructors
# ------------------------------------------------------------------------------
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proc init*(ac: var AccessList) =
ac.slots = initTable[EthAddress, SlotSet]()
proc init*(_: type AccessList): AccessList {.inline.} =
result.init()
# ------------------------------------------------------------------------------
# Public functions
# ------------------------------------------------------------------------------
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func contains*(ac: AccessList, address: EthAddress): bool {.inline.} =
address in ac.slots
# returnValue: (addressPresent, slotPresent)
func contains*(ac: var AccessList, address: EthAddress, slot: UInt256): bool =
ac.slots.withValue(address, val):
result = slot in val[]
proc merge*(ac: var AccessList, other: AccessList) {.inline.} =
for k, v in other.slots:
ac.slots.withValue(k, val):
val[].incl v
do:
ac.slots[k] = v
proc add*(ac: var AccessList, address: EthAddress) =
if address notin ac.slots:
ac.slots[address] = initHashSet[UInt256]()
proc add*(ac: var AccessList, address: EthAddress, slot: UInt256) =
ac.slots.withValue(address, val):
val[].incl slot
do:
ac.slots[address] = toHashSet([slot])
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proc clear*(ac: var AccessList) {.inline.} =
ac.slots.clear()
func getAccessList*(ac: AccessList): common.AccessList =
for address, slots in ac.slots:
result.add common.AccessPair(
address : address,
storageKeys: slots.toStorageKeys,
)