103 lines
3.7 KiB
Nim
103 lines
3.7 KiB
Nim
# beacon_chain
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# Copyright (c) 2018-2024 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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chronicles, stew/shims/net, stew/results,
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eth/p2p/discoveryv5/[enr, protocol, node],
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".."/[conf, conf_light_client]
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from std/os import splitFile
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from std/strutils import cmpIgnoreCase, split, startsWith, strip, toLowerAscii
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export protocol
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type
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Eth2DiscoveryProtocol* = protocol.Protocol
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Eth2DiscoveryId* = NodeId
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export
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Eth2DiscoveryProtocol, open, start, close, closeWait, queryRandom,
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updateRecord, results
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func parseBootstrapAddress*(address: string):
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Result[enr.Record, cstring] =
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let lowerCaseAddress = toLowerAscii(string address)
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if lowerCaseAddress.startsWith("enr:"):
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var enrRec: enr.Record
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if enrRec.fromURI(string address):
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return ok enrRec
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return err "Invalid ENR bootstrap record"
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elif lowerCaseAddress.startsWith("enode:"):
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return err "ENode bootstrap addresses are not supported"
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else:
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return err "Ignoring unrecognized bootstrap address type"
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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[enr.Record]) =
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# Ignore empty lines or lines starting with #
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if bootstrapAddr.len == 0 or bootstrapAddr[0] == '#':
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return
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# Ignore comments in
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# https://github.com/eth-clients/eth2-networks/blob/063f826a03676c33c95a66306916f18b690d35eb/shared/mainnet/bootstrap_nodes.txt
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let enrRes = parseBootstrapAddress(bootstrapAddr.split(" # ")[0])
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if enrRes.isOk:
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bootstrapEnrs.add enrRes.value
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else:
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warn "Ignoring invalid bootstrap address",
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bootstrapAddr, reason = enrRes.error
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proc loadBootstrapFile*(bootstrapFile: string,
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bootstrapEnrs: var seq[enr.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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error "Could not read bootstrap file", msg = e.msg
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quit 1
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else:
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error "Unknown bootstrap file format", ext
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quit 1
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proc new*(T: type Eth2DiscoveryProtocol,
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config: BeaconNodeConf | LightClientConf,
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enrIp: Option[IpAddress], enrTcpPort, enrUdpPort: Option[Port],
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pk: PrivateKey,
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enrFields: openArray[(string, seq[byte])], rng: ref HmacDrbgContext):
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T =
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# TODO
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# Implement more configuration options:
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# * for setting up a specific key
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# * for using a persistent database
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var bootstrapEnrs: seq[enr.Record]
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for node in config.bootstrapNodes:
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addBootstrapNode(node, bootstrapEnrs)
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loadBootstrapFile(string config.bootstrapNodesFile, bootstrapEnrs)
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when config is BeaconNodeConf:
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let persistentBootstrapFile = config.dataDir / "bootstrap_nodes.txt"
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if fileExists(persistentBootstrapFile):
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loadBootstrapFile(persistentBootstrapFile, bootstrapEnrs)
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newProtocol(pk, enrIp, enrTcpPort, enrUdpPort, enrFields, bootstrapEnrs,
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bindPort = config.udpPort, bindIp = config.listenAddress,
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enrAutoUpdate = config.enrAutoUpdate, rng = rng)
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