nimbus-eth1/premix/no-hunter.nim

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# Nimbus
# Copyright (c) 2020-2024 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.
import
std/[json, tables, hashes],
eth/trie/trie_defs,
stint, stew/byteutils, chronicles,
../nimbus/[vm_state, vm_types],
../nimbus/utils/utils,
../nimbus/tracer,
../nimbus/db/[core_db, state_db/read_write],
../nimbus/core/executor,
../nimbus/common/common,
"."/[configuration, downloader, parser, premixcore]
const
emptyCodeHash = blankStringHash
proc store(memoryDB: CoreDbRef, branch: JsonNode) =
for p in branch:
let rlp = hexToSeqByte(p.getStr)
let hash = keccakHash(rlp)
memoryDB.kvt.put(hash.data, rlp)
proc parseAddress(address: string): EthAddress =
hexToByteArray(address, result)
proc parseU256(val: string): UInt256 =
UInt256.fromHex(val)
proc prepareBlockEnv(parent: BlockHeader, thisBlock: Block): CoreDbRef =
var
accounts = requestPostState(thisBlock)
memoryDB = newCoreDbRef DefaultDbMemory
accountDB = newAccountStateDB(memoryDB, parent.stateRoot)
parentNumber = %(parent.number.prefixHex)
for address, account in accounts:
updateAccount(address, account, parent.number)
let
accountProof = account["accountProof"]
storageProof = account["storageProof"]
address = parseAddress(address)
acc = parseAccount(account)
memoryDB.store(accountProof)
accountDB.setAccount(address, acc)
for storage in storageProof:
let
key = parseU256(storage["key"].getStr)
val = parseU256(storage["value"].getStr)
proof = storage["proof"]
memoryDB.store(proof)
accountDB.setStorage(address, key, val)
if acc.codeHash != emptyCodeHash:
let codeStr = request("eth_getCode", %[%address.prefixHex, parentNumber])
let code = hexToSeqByte(codeStr.getStr)
accountDB.setCode(address, code)
accountDB.setAccount(address, acc)
result = memoryDB
type
HunterVMState = ref object of BaseVMState
headers: Table[BlockNumber, BlockHeader]
proc hash*(x: UInt256): Hash =
result = hash(x.toBytesBE)
proc new(T: type HunterVMState; parent, header: BlockHeader, com: CommonRef): T =
new result
result.init(parent, header, com)
result.headers = Table[BlockNumber, BlockHeader]()
method getAncestorHash*(vmState: HunterVMState, blockNumber: BlockNumber): Hash256 =
if blockNumber in vmState.headers:
result = vmState.headers[blockNumber].hash
else:
let data = requestHeader(blockNumber)
let header = parseBlockHeader(data)
result = header.hash
vmState.headers[blockNumber] = header
proc putAncestorsIntoDB(vmState: HunterVMState, db: CoreDbRef) =
for header in vmState.headers.values:
db.addBlockNumberToHashLookup(header)
proc huntProblematicBlock(blockNumber: UInt256): Result[void, string] =
let
# prepare needed state from previous block
parentNumber = blockNumber - 1
thisBlock = requestBlock(blockNumber)
parentBlock = requestBlock(parentNumber)
memoryDB = prepareBlockEnv(parentBlock.header, thisBlock)
# try to execute current block
com = CommonRef.new(memoryDB)
discard com.db.setHead(parentBlock.header, true)
let transaction = memoryDB.beginTransaction()
defer: transaction.dispose()
let
vmState = HunterVMState.new(parentBlock.header, thisBlock.header, com)
validationResult = vmState.processBlock(thisBlock.header, thisBlock.body)
if validationResult.isErr():
transaction.rollback()
putAncestorsIntoDB(vmState, com.db)
vmState.dumpDebuggingMetaData(thisBlock.header, thisBlock.body, false)
validationResult
proc main() {.used.} =
let conf = getConfiguration()
if conf.head == 0.u256:
echo "please specify the starting block with `--head:blockNumber`"
quit(QuitFailure)
if conf.maxBlocks == 0:
echo "please specify the number of problematic blocks you want to hunt with `--maxBlocks:number`"
quit(QuitFailure)
var
problematicBlocks = newSeq[UInt256]()
blockNumber = conf.head
while true:
echo blockNumber
if huntProblematicBlock(blockNumber).isErr:
echo "shot down problematic block: ", blockNumber
problematicBlocks.add blockNumber
blockNumber = blockNumber + 1
if problematicBlocks.len >= conf.maxBlocks:
echo "Problematic blocks: ", problematicBlocks
break
when isMainModule:
var message: string
## Processing command line arguments
if processArguments(message) != Success:
echo message
quit(QuitFailure)
else:
if len(message) > 0:
echo message
quit(QuitSuccess)
try:
main()
except:
echo getCurrentExceptionMsg()