nimbus-eth1/fluffy/network_metadata.nim

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# Nimbus
# Copyright (c) 2022 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.
{.push raises: [Defect].}
import
std/[sequtils, strutils, os, macros]
proc loadBootstrapNodes(
path: string): seq[string] {.raises: [IOError, Defect].} =
# Read a list of ENR URIs from a file containing a flat list of entries.
# If the file can't be read, this will raise. This is intentionally.
splitLines(readFile(path)).
filterIt(it.startsWith("enr:")).
mapIt(it.strip())
proc loadCompileTimeBootstrapNodes(
path: string): seq[string] {.raises: [Defect].} =
try:
return loadBootstrapNodes(path)
# TODO: This error doesn't seem to get printed. It instead dies with an
# unhandled exception (IOError)
except IOError as err:
macros.error "Failed to load bootstrap nodes metadata at '" &
path & "': " & err.msg
const
# TODO: Change this from our local repo to an eth-client repo if/when this
# gets created for the Portal networks.
portalNetworksDir =
currentSourcePath.parentDir.replace('\\', '/') / "network_data"
# Note:
# For now it gets called testnet0 but this Portal network serves Eth1 mainnet
# data. Giving the actual Portal (test)networks different names might not be
# that useful as there is no way to distinguish the networks currently.
# Additionally, sub-networks like history network pass the eth1 network
# information in their requests, potentially supporting many eth1 networks
# over a single Portal Network.
#
# When more config data is required per Portal network, a metadata object can
# be created, but right now only bootstrap nodes can be different.
# TODO: It would be nice to be able to use `loadBootstrapFile` here, but that
# doesn't work at compile time. The main issue seems to be the usage of
# rlp.rawData() in the enr code.
testnet0BootstrapNodes* = loadCompileTimeBootstrapNodes(
portalNetworksDir / "testnet0" / "bootstrap_nodes.txt")