120 lines
3.8 KiB
Nim
120 lines
3.8 KiB
Nim
# Nimbus
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# Copyright (c) 2021-2023 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/[os, strutils],
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chronicles, stew/io2,
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eth/p2p/discoveryv5/enr
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iterator strippedLines(filename: string): string {.raises: [ref IOError].} =
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for line in lines(filename):
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let stripped = strip(line)
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if stripped.startsWith('#'): # Comments
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continue
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if stripped.len > 0:
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yield stripped
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proc addBootstrapNode(bootstrapAddr: string,
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bootstrapEnrs: var seq[Record]) =
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var enrRec: enr.Record
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if enrRec.fromURI(bootstrapAddr):
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bootstrapEnrs.add enrRec
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else:
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warn "Ignoring invalid bootstrap ENR", bootstrapAddr
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proc loadBootstrapFile*(bootstrapFile: string,
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bootstrapEnrs: var seq[Record]) =
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if bootstrapFile.len == 0: return
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let ext = splitFile(bootstrapFile).ext
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if cmpIgnoreCase(ext, ".txt") == 0 or cmpIgnoreCase(ext, ".enr") == 0 :
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try:
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for ln in strippedLines(bootstrapFile):
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addBootstrapNode(ln, bootstrapEnrs)
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except IOError as e:
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fatal "Could not read bootstrap file", msg = e.msg
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quit 1
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else:
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fatal "Unknown bootstrap file format", ext
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quit 1
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# Note:
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# Currently just works with the network private key stored as hex in a file.
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# In the future it would be nice to re-use keystore from nimbus-eth2 for this.
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# However that would require the pull the keystore.nim and parts of
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# keystore_management.nim out of nimbus-eth2.
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proc getPersistentNetKey*(
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rng: var HmacDrbgContext, keyFilePath: string):
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tuple[key: PrivateKey, newNetKey: bool] =
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logScope:
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key_file = keyFilePath
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if fileAccessible(keyFilePath, {AccessFlags.Find}):
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info "Network key file is present, reading key"
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let readResult = readAllChars(keyFilePath)
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if readResult.isErr():
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fatal "Could not load network key file",
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error = ioErrorMsg(readResult.error)
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quit QuitFailure
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let netKeyInHex = readResult.get()
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if netKeyInHex.len() == 64:
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let netKey = PrivateKey.fromHex(netKeyInHex)
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if netKey.isOk():
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info "Network key was successfully read"
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(netKey.get(), false)
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else:
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fatal "Invalid private key from file", error = netKey.error
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quit QuitFailure
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else:
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fatal "Invalid length of private in file"
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quit QuitFailure
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else:
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info "Network key file is missing, creating a new one"
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let key = PrivateKey.random(rng)
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if (let res = io2.writeFile(keyFilePath, $key); res.isErr):
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fatal "Failed to write the network key file",
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error = ioErrorMsg(res.error)
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quit 1
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info "New network key file was created"
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(key, true)
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proc getPersistentEnr*(enrFilePath: string): Opt[enr.Record] =
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logScope:
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enr_file = enrFilePath
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if fileAccessible(enrFilePath, {AccessFlags.Find}):
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info "ENR file is present, reading ENR"
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let readResult = readAllChars(enrFilePath)
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if readResult.isErr():
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warn "Could not load ENR file",
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error = ioErrorMsg(readResult.error)
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return Opt.none(enr.Record)
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let enrUri = readResult.get()
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var record: enr.Record
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# TODO: This old API of var passing is very error prone and should be
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# changed in nim-eth.
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if not record.fromURI(enrUri):
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warn "Could not decode ENR from ENR file"
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return Opt.none(enr.Record)
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else:
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return Opt.some(record)
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else:
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warn "Could not find ENR file. Was it manually deleted?"
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return Opt.none(enr.Record)
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