nimbus-eth1/nimbus/db/state_db/base.nim

281 lines
9.2 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.
import
std/[sets, strformat],
chronicles,
eth/[common, rlp],
../../constants,
../../utils/utils,
".."/[core_db, distinct_tries, storage_types]
logScope:
topics = "state_db"
# aleth/geth/parity compatibility mode:
#
# affected test cases both in GST and BCT:
# - stSStoreTest\InitCollision.json
# - stRevertTest\RevertInCreateInInit.json
# - stCreate2\RevertInCreateInInitCreate2.json
#
# pyEVM sided with original Nimbus EVM
#
# implementation difference:
# Aleth/geth/parity using accounts cache.
# When contract creation happened on an existing
# but 'empty' account with non empty storage will
# get new empty storage root.
# Aleth cs. only clear the storage cache while both pyEVM
# and Nimbus will modify the state trie.
# During the next SSTORE call, aleth cs. calculate
# gas used based on this cached 'original storage value'.
# In other hand pyEVM and Nimbus will fetch
# 'original storage value' from state trie.
#
# Both Yellow Paper and EIP2200 are not clear about this
# situation but since aleth/geth/and parity implement this
# behaviour, we perhaps also need to implement it.
#
# TODO: should this compatibility mode enabled via
# compile time switch, runtime switch, or just hard coded
# it?
const
aleth_compat = true
type
AccountStateDB* = ref object
trie: AccountsTrie
originalRoot: KeccakHash # will be updated for every transaction
#transactionID: CoreDbTxID
when aleth_compat:
cleared: HashSet[EthAddress]
proc pruneTrie*(db: AccountStateDB): bool =
db.trie.isPruning
proc db*(db: AccountStateDB): CoreDbRef =
db.trie.db
proc kvt*(db: AccountStateDB): CoreDbKvtRef =
db.trie.db.kvt
proc rootHash*(db: AccountStateDB): KeccakHash =
db.trie.rootHash
proc `rootHash=`*(db: AccountStateDB, root: KeccakHash) =
db.trie = initAccountsTrie(db.trie.db, root, db.trie.isPruning)
proc newAccountStateDB*(backingStore: CoreDbRef,
root: KeccakHash, pruneTrie: bool): AccountStateDB =
result.new()
result.trie = initAccountsTrie(backingStore, root, pruneTrie)
result.originalRoot = root
#result.transactionID = backingStore.getTransactionID()
when aleth_compat:
result.cleared = initHashSet[EthAddress]()
proc getTrie*(db: AccountStateDB): CoreDbMptRef =
db.trie.mpt
proc getSecureTrie*(db: AccountStateDB): CoreDbPhkRef =
db.trie.phk
proc getAccount*(db: AccountStateDB, address: EthAddress): Account =
let recordFound = db.trie.getAccountBytes(address)
if recordFound.len > 0:
result = rlp.decode(recordFound, Account)
else:
result = newAccount()
proc setAccount*(db: AccountStateDB, address: EthAddress, account: Account) =
db.trie.putAccountBytes(address, rlp.encode(account))
proc deleteAccount*(db: AccountStateDB, address: EthAddress) =
db.trie.delAccountBytes(address)
proc getCodeHash*(db: AccountStateDB, address: EthAddress): Hash256 =
let account = db.getAccount(address)
result = account.codeHash
proc getBalance*(db: AccountStateDB, address: EthAddress): UInt256 =
let account = db.getAccount(address)
account.balance
proc setBalance*(db: AccountStateDB, address: EthAddress, balance: UInt256) =
var account = db.getAccount(address)
account.balance = balance
db.setAccount(address, account)
proc addBalance*(db: AccountStateDB, address: EthAddress, delta: UInt256) =
db.setBalance(address, db.getBalance(address) + delta)
proc subBalance*(db: AccountStateDB, address: EthAddress, delta: UInt256) =
db.setBalance(address, db.getBalance(address) - delta)
template createTrieKeyFromSlot(slot: UInt256): auto =
# Converts a number to hex big-endian representation including
# prefix and leading zeros:
slot.toBytesBE
# Original py-evm code:
# pad32(int_to_big_endian(slot))
# morally equivalent to toByteRange_Unnecessary but with different types
template getStorageTrie(db: AccountStateDB, account: Account): auto =
storageTrieForAccount(db.trie, account, false)
proc clearStorage*(db: AccountStateDB, address: EthAddress) =
var account = db.getAccount(address)
account.storageRoot = EMPTY_ROOT_HASH
db.setAccount(address, account)
when aleth_compat:
db.cleared.incl address
proc getStorageRoot*(db: AccountStateDB, address: EthAddress): Hash256 =
var account = db.getAccount(address)
account.storageRoot
proc setStorage*(db: AccountStateDB,
address: EthAddress,
slot: UInt256, value: UInt256) =
var account = db.getAccount(address)
var accountTrie = getStorageTrie(db, account)
let slotAsKey = createTrieKeyFromSlot slot
if value > 0:
let encodedValue = rlp.encode(value)
accountTrie.putSlotBytes(slotAsKey, encodedValue)
else:
accountTrie.delSlotBytes(slotAsKey)
# map slothash back to slot value
# see iterator storage below
var
triedb = db.kvt
# slotHash can be obtained from accountTrie.put?
slotHash = keccakHash(slot.toBytesBE)
triedb.put(slotHashToSlotKey(slotHash.data).toOpenArray, rlp.encode(slot))
account.storageRoot = accountTrie.rootHash
db.setAccount(address, account)
iterator storage*(db: AccountStateDB, address: EthAddress): (UInt256, UInt256) =
let
storageRoot = db.getStorageRoot(address)
triedb = db.kvt
trie = db.db.mptPrune storageRoot
for key, value in trie:
if key.len != 0:
var keyData = triedb.get(slotHashToSlotKey(key).toOpenArray)
yield (rlp.decode(keyData, UInt256), rlp.decode(value, UInt256))
proc getStorage*(db: AccountStateDB, address: EthAddress, slot: UInt256): (UInt256, bool) =
let
account = db.getAccount(address)
slotAsKey = createTrieKeyFromSlot slot
storageTrie = getStorageTrie(db, account)
let
foundRecord = storageTrie.getSlotBytes(slotAsKey)
if foundRecord.len > 0:
result = (rlp.decode(foundRecord, UInt256), true)
else:
result = (0.u256, false)
proc setNonce*(db: AccountStateDB, address: EthAddress, newNonce: AccountNonce) =
var account = db.getAccount(address)
if newNonce != account.nonce:
account.nonce = newNonce
db.setAccount(address, account)
proc getNonce*(db: AccountStateDB, address: EthAddress): AccountNonce =
let account = db.getAccount(address)
account.nonce
proc incNonce*(db: AccountStateDB, address: EthAddress) {.inline.} =
db.setNonce(address, db.getNonce(address) + 1)
proc setCode*(db: AccountStateDB, address: EthAddress, code: openArray[byte]) =
var account = db.getAccount(address)
# TODO: implement JournalDB to store code and storage
# also use JournalDB to revert state trie
let
newCodeHash = keccakHash(code)
triedb = db.kvt
if code.len != 0:
triedb.put(contractHashKey(newCodeHash).toOpenArray, code)
account.codeHash = newCodeHash
db.setAccount(address, account)
proc getCode*(db: AccountStateDB, address: EthAddress): seq[byte] =
let triedb = db.kvt
triedb.get(contractHashKey(db.getCodeHash(address)).toOpenArray)
proc hasCodeOrNonce*(db: AccountStateDB, address: EthAddress): bool {.inline.} =
db.getNonce(address) != 0 or db.getCodeHash(address) != EMPTY_SHA3
proc dumpAccount*(db: AccountStateDB, addressS: string): string =
let address = addressS.parseAddress
return fmt"{addressS}: Storage: {db.getStorage(address, 0.u256)}; getAccount: {db.getAccount address}"
proc accountExists*(db: AccountStateDB, address: EthAddress): bool =
db.trie.getAccountBytes(address).len > 0
proc isEmptyAccount*(db: AccountStateDB, address: EthAddress): bool =
let recordFound = db.trie.getAccountBytes(address)
assert(recordFound.len > 0)
let account = rlp.decode(recordFound, Account)
result = account.codeHash == EMPTY_SHA3 and
account.balance.isZero and
account.nonce == 0
proc isDeadAccount*(db: AccountStateDB, address: EthAddress): bool =
let recordFound = db.trie.getAccountBytes(address)
if recordFound.len > 0:
let account = rlp.decode(recordFound, Account)
result = account.codeHash == EMPTY_SHA3 and
account.balance.isZero and
account.nonce == 0
else:
result = true
# Note: `state_db.getCommittedStorage()` is nowhere used.
#
#proc getCommittedStorage*(db: AccountStateDB, address: EthAddress, slot: UInt256): UInt256 =
# let tmpHash = db.rootHash
# db.rootHash = db.originalRoot
# db.transactionID.shortTimeReadOnly():
# when aleth_compat:
# if address in db.cleared:
# debug "Forced contract creation on existing account detected", address
# result = 0.u256
# else:
# result = db.getStorage(address, slot)[0]
# else:
# result = db.getStorage(address, slot)[0]
# db.rootHash = tmpHash
# Note: `state_db.updateOriginalRoot()` is nowhere used.
#
#proc updateOriginalRoot*(db: AccountStateDB) =
# ## this proc will be called for every transaction
# db.originalRoot = db.rootHash
# # no need to rollback or dispose
# # transactionID, it will be handled elsewhere
# db.transactionID = db.db.getTransactionID()
#
# when aleth_compat:
# db.cleared.clear()
# End