74 lines
2.1 KiB
Nim
74 lines
2.1 KiB
Nim
# Nimbus
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# Copyright (c) 2024 Status Research & Development GmbH
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# Licensed and distributed under either of
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# * MIT license (license terms in the root directory or at https://opensource.org/licenses/MIT).
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# * Apache v2 license (license terms in the root directory or at https://www.apache.org/licenses/LICENSE-2.0).
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# at your option. This file may not be copied, modified, or distributed except according to those terms.
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{.push raises: [].}
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import
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std/tables,
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stint,
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eth/[common, rlp],
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results,
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../nimbus/db/[core_db, state_db],
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./[tree_from_witness, witness_types]
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export results
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type
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BlockWitness* = seq[byte]
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AccountData* = object
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account*: Account
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code* : seq[byte]
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storage*: Table[UInt256, UInt256]
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proc buildAccountsTableFromKeys(
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db: ReadOnlyStateDB,
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keys: openArray[AccountAndSlots]): TableRef[EthAddress, AccountData] {.raises: [RlpError].} =
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var accounts = newTable[EthAddress, AccountData]()
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for key in keys:
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let account = db.getAccount(key.address)
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let code = if key.codeLen > 0:
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db.db.newKvt().get(account.codeHash.data).valueOr: EmptyBlob
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else: @[]
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var storage = Table[UInt256, UInt256]()
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for slot in key.slots:
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let slotKey = fromBytesBE(UInt256, slot)
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let rc = db.getStorage(key.address, slotKey)
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if rc.isOK:
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storage[slotKey] = rc.value
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accounts[key.address] = AccountData(
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account: account.to(Account),
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code: code,
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storage: storage)
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return accounts
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proc verifyWitness*(
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trustedStateRoot: KeccakHash,
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witness: BlockWitness,
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flags: WitnessFlags): Result[TableRef[EthAddress, AccountData], string] =
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if witness.len() == 0:
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return err("witness is empty")
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let db = newCoreDbRef(AristoDbMemory) # `AristoDbVoid` has smaller footprint
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var tb = initTreeBuilder(witness, db, flags)
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try:
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let stateRoot = tb.buildTree()
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if stateRoot != trustedStateRoot:
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return err("witness stateRoot doesn't match trustedStateRoot")
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let ac = newAccountStateDB(db, trustedStateRoot)
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let accounts = buildAccountsTableFromKeys(ReadOnlyStateDB(ac), tb.keys)
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ok(accounts)
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except Exception as e:
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err(e.msg)
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