nimbus-eth1/fluffy/common/common_utils.nim

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# Nimbus
# Copyright (c) 2021-2022 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/[os, strutils],
chronicles, stew/io2,
eth/p2p/discoveryv5/enr
iterator strippedLines(filename: string): string {.raises: [ref IOError].} =
for line in lines(filename):
let stripped = strip(line)
if stripped.startsWith('#'): # Comments
continue
if stripped.len > 0:
yield stripped
proc addBootstrapNode(bootstrapAddr: string,
bootstrapEnrs: var seq[Record]) =
var enrRec: enr.Record
if enrRec.fromURI(bootstrapAddr):
bootstrapEnrs.add enrRec
else:
warn "Ignoring invalid bootstrap ENR", bootstrapAddr
proc loadBootstrapFile*(bootstrapFile: string,
bootstrapEnrs: var seq[Record]) =
if bootstrapFile.len == 0: return
let ext = splitFile(bootstrapFile).ext
if cmpIgnoreCase(ext, ".txt") == 0 or cmpIgnoreCase(ext, ".enr") == 0 :
try:
for ln in strippedLines(bootstrapFile):
addBootstrapNode(ln, bootstrapEnrs)
except IOError as e:
fatal "Could not read bootstrap file", msg = e.msg
quit 1
else:
fatal "Unknown bootstrap file format", ext
quit 1
# Note:
# Currently just works with the network private key stored as hex in a file.
# In the future it would be nice to re-use keystore from nimbus-eth2 for this.
# However that would require the pull the keystore.nim and parts of
# keystore_management.nim out of nimbus-eth2.
proc getPersistentNetKey*(
rng: var HmacDrbgContext, keyFilePath: string, dataDir: string):
PrivateKey =
logScope:
key_file = keyFilePath
if fileAccessible(keyFilePath, {AccessFlags.Find}):
info "Network key file is present, reading key"
let readResult = readAllChars(keyFilePath)
if readResult.isErr():
fatal "Could not load network key file",
error = ioErrorMsg(readResult.error)
quit QuitFailure
let netKeyInHex = readResult.get()
if netKeyInHex.len() == 64:
let netKey = PrivateKey.fromHex(netKeyInHex)
if netKey.isOk():
info "Network key was successfully read"
netKey.get()
else:
fatal "Invalid private key from file", error = netKey.error
quit QuitFailure
else:
fatal "Invalid length of private in file"
quit QuitFailure
else:
info "Network key file is missing, creating a new one"
let key = PrivateKey.random(rng)
if (let res = io2.writeFile(keyFilePath, $key); res.isErr):
fatal "Failed to write the network key file",
error = ioErrorMsg(res.error)
quit 1
info "New network key file was created"
key