# Nimbus # Copyright (c) 2022-2023 Status Research & Development GmbH # Licensed and distributed under either of # * MIT license (license terms in the root directory or at https://opensource.org/licenses/MIT). # * Apache v2 license (license terms in the root directory or at https://www.apache.org/licenses/LICENSE-2.0). # at your option. This file may not be copied, modified, or distributed except according to those terms. # Testing tool to verify that a specific range of blocks can be fetched from # the Portal network. {.push raises: [].} import std/strutils, confutils, chronicles, chronicles/topics_registry, stew/byteutils, eth/common/eth_types, ../../nimbus/rpc/[hexstrings, rpc_types], ../../nimbus/errors, ../rpc/eth_rpc_client type BlockWalkConf* = object logLevel* {. defaultValue: LogLevel.INFO defaultValueDesc: $LogLevel.INFO desc: "Sets the log level" name: "log-level" .}: LogLevel rpcAddress* {. desc: "Address of the JSON-RPC service" defaultValue: "127.0.0.1" name: "rpc-address" .}: string rpcPort* {. defaultValue: 8545 desc: "Port of the JSON-RPC service" name: "rpc-port" .}: uint16 blockHash* {. desc: "The block hash from where to start walking the blocks backwards" name: "block-hash" .}: Hash256 proc parseCmdArg*(T: type Hash256, p: string): T {.raises: [ValueError].} = var hash: Hash256 try: hexToByteArray(p, hash.data) except ValueError: raise newException(ValueError, "Invalid Hash256") return hash proc completeCmdArg*(T: type Hash256, val: string): seq[string] = return @[] proc walkBlocks(client: RpcClient, startHash: Hash256) {.async.} = var parentHash = startHash var blockNumber = "" # Should be 0x0, but block 0 does not exist in the json data file while blockNumber != "0x1": let parentBlockOpt = try: await client.eth_getBlockByHash(parentHash.ethHashStr(), false) except RpcPostError as e: # RpcPostError when for example timing out on the request. Could retry # in this case. fatal "Error occured on JSON-RPC request", error = e.msg quit 1 except ValidationError as e: # ValidationError from buildBlockObject, should not occur with proper # blocks fatal "Error occured on JSON-RPC request", error = e.msg quit 1 # Using the http connection re-use seems to slow down these sequentual # requests considerably. Force a new connection setup by doing a close after # each request. await client.close() if parentBlockOpt.isNone(): fatal "Failed getting parent block", hash = parentHash.data.toHex() quit 1 let parentBlock = parentBlockOpt.get() if parentBlock.number.isNone() or parentBlock.hash.isNone(): fatal "Parent block cannot be a pending block", hash = parentHash.data.toHex() quit 1 blockNumber = parentBlock.number.get().string parentHash = parentBlock.parentHash echo "Block " & $blockNumber.parseHexInt() & ": " & parentBlock.hash.get().data.toHex() proc run(config: BlockWalkConf) {.async.} = let client = newRpcHttpClient() await client.connect(config.rpcAddress, Port(config.rpcPort), false) await walkBlocks(client, config.blockHash) when isMainModule: {.pop.} let config = BlockWalkConf.load() {.push raises: [].} setLogLevel(config.logLevel) waitFor run(config)