138 lines
4.7 KiB
Nim
138 lines
4.7 KiB
Nim
# Nimbus
|
|
# Copyright (c) 2018 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
|
|
sequtils, tables,
|
|
eth_common, nimcrypto, rlp, eth_trie/[hexary, memdb],
|
|
../constants, ../errors, ../validation, ../account, ../logging
|
|
|
|
type
|
|
AccountStateDB* = ref object
|
|
trie: HexaryTrie
|
|
|
|
proc rootHash*(accountDb: AccountStateDB): KeccakHash =
|
|
accountDb.trie.rootHash
|
|
|
|
# proc `rootHash=`*(db: var AccountStateDB, value: string) =
|
|
# TODO: self.Trie.rootHash = value
|
|
|
|
proc newAccountStateDB*(backingStore: TrieDatabaseRef,
|
|
root: KeccakHash, readOnly: bool = false): AccountStateDB =
|
|
result.new()
|
|
result.trie = initHexaryTrie(backingStore, root)
|
|
|
|
proc logger*(db: AccountStateDB): Logger =
|
|
logging.getLogger("db.State")
|
|
|
|
template createRangeFromAddress(address: EthAddress): ByteRange =
|
|
## XXX: The name of this proc is intentionally long, because it
|
|
## performs a memory allocation and data copying that may be eliminated
|
|
## in the future. Avoid renaming it to something similar as `toRange`, so
|
|
## it can remain searchable in the code.
|
|
toRange(@address)
|
|
|
|
proc getAccount(db: AccountStateDB, address: EthAddress): Account =
|
|
let recordFound = db.trie.get(createRangeFromAddress address)
|
|
if recordFound.len > 0:
|
|
result = rlp.decode(recordFound, Account)
|
|
else:
|
|
result = newAccount()
|
|
|
|
proc setAccount(db: AccountStateDB, address: EthAddress, account: Account) =
|
|
db.trie.put createRangeFromAddress(address), rlp.encode(account)
|
|
|
|
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: var AccountStateDB, address: EthAddress, balance: UInt256) =
|
|
var account = db.getAccount(address)
|
|
account.balance = balance
|
|
db.setAccount(address, account)
|
|
|
|
proc deltaBalance*(db: var AccountStateDB, address: EthAddress, delta: UInt256) =
|
|
db.setBalance(address, db.getBalance(address) + delta)
|
|
|
|
template createTrieKeyFromSlot(slot: UInt256): ByteRange =
|
|
# XXX: This is too expensive. Similar to `createRangeFromAddress`
|
|
# Converts a number to hex big-endian representation including
|
|
# prefix and leading zeros:
|
|
@(keccak256.digest(slot.toByteArrayBE).data).toRange
|
|
# Original py-evm code:
|
|
# pad32(int_to_big_endian(slot))
|
|
|
|
proc setStorage*(db: var AccountStateDB,
|
|
address: EthAddress,
|
|
slot: UInt256, value: UInt256) =
|
|
#validateGte(value, 0, title="Storage Value")
|
|
#validateGte(slot, 0, title="Storage Slot")
|
|
|
|
var account = db.getAccount(address)
|
|
var accountTrie = initHexaryTrie(db.trie.db, account.storageRoot)
|
|
let slotAsKey = createTrieKeyFromSlot slot
|
|
|
|
if value > 0:
|
|
let encodedValue = rlp.encode value
|
|
accountTrie.put(slotAsKey, encodedValue)
|
|
else:
|
|
accountTrie.del(slotAsKey)
|
|
|
|
account.storageRoot = accountTrie.rootHash
|
|
db.setAccount(address, account)
|
|
|
|
proc getStorage*(db: AccountStateDB, address: EthAddress, slot: UInt256): (UInt256, bool) =
|
|
#validateGte(slot, 0, title="Storage Slot")
|
|
|
|
let
|
|
account = db.getAccount(address)
|
|
slotAsKey = createTrieKeyFromSlot slot
|
|
accountTrie = initHexaryTrie(db.trie.db, account.storageRoot)
|
|
|
|
let
|
|
foundRecord = accountTrie.get(slotAsKey)
|
|
|
|
if foundRecord.len > 0:
|
|
result = (rlp.decode(foundRecord, UInt256), true)
|
|
else:
|
|
result = (0.u256, false)
|
|
|
|
proc setNonce*(db: var AccountStateDB, address: EthAddress, nonce: UInt256) =
|
|
#validateGte(nonce, 0, title="Nonce")
|
|
|
|
var account = db.getAccount(address)
|
|
account.nonce = nonce
|
|
|
|
db.setAccount(address, account)
|
|
|
|
proc getNonce*(db: AccountStateDB, address: EthAddress): UInt256 =
|
|
# TODO it is very strange that we require a var param here
|
|
|
|
let account = db.getAccount(address)
|
|
account.nonce
|
|
|
|
proc toByteRange_Unnecessary*(h: KeccakHash): ByteRange =
|
|
## XXX: Another proc used to mark unnecessary conversions it the code
|
|
var s = @(h.data)
|
|
return s.toRange
|
|
|
|
proc setCode*(db: var AccountStateDB, address: EthAddress, code: ByteRange) =
|
|
|
|
var account = db.getAccount(address)
|
|
account.codeHash = keccak256.digest code.toOpenArray
|
|
# XXX: this uses the journaldb in py-evm
|
|
db.trie.put(account.codeHash.toByteRange_Unnecessary, code)
|
|
db.setAccount(address, account)
|
|
|
|
proc getCode*(db: AccountStateDB, address: EthAddress): ByteRange =
|
|
let codeHash = db.getCodeHash(address)
|
|
result = db.trie.get(codeHash.toByteRange_Unnecessary)
|
|
|