nix-bitcoin/modules/nodeinfo.nix

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{ config, lib, pkgs, ... }:
with lib;
let
options = {
nix-bitcoin.nodeinfo = {
enable = mkEnableOption "nodeinfo";
program = mkOption {
readOnly = true;
default = script;
defaultText = "(See source)";
};
services = mkOption {
internal = true;
type = types.attrs;
default = {};
defaultText = "(See source)";
description = ''
Nodeinfo service definitions.
'';
};
lib = mkOption {
internal = true;
readOnly = true;
default = nodeinfoLib;
defaultText = "(See source)";
description = ''
Helper functions for defining nodeinfo services.
'';
};
};
};
cfg = config.nix-bitcoin.nodeinfo;
nbLib = config.nix-bitcoin.lib;
script = pkgs.writeScriptBin "nodeinfo" ''
#!${pkgs.python3}/bin/python
import json
import subprocess
import sys
from collections import OrderedDict
def success(*args):
return subprocess.call(args, stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL) == 0
def is_active(unit):
return success("systemctl", "is-active", "--quiet", unit)
def is_enabled(unit):
return success("systemctl", "is-enabled", "--quiet", unit)
def cmd(*args):
return subprocess.run(args, stdout=subprocess.PIPE).stdout.decode('utf-8')
def shell(*args):
return cmd("bash", "-c", *args).strip()
infos = OrderedDict()
operator = "${config.nix-bitcoin.operator.name}"
def set_onion_address(info, name, port):
path = f"/var/lib/onion-addresses/{operator}/{name}"
try:
with open(path, "r") as f:
onion_address = f.read().strip()
except OSError:
print(f"error reading file {path}", file=sys.stderr)
return
info["onion_address"] = f"{onion_address}:{port}"
def add_service(service, make_info):
if not is_active(service):
infos[service] = "service is not running"
else:
info = OrderedDict()
exec(make_info, globals(), locals())
infos[service] = info
if is_enabled("onion-adresses") and not is_active("onion-adresses"):
print("error: service 'onion-adresses' is not running")
exit(1)
${concatStrings infos}
print(json.dumps(infos, indent=2))
'';
infos = map (serviceName:
let serviceCfg = config.services.${serviceName};
in optionalString serviceCfg.enable (cfg.services.${serviceName} serviceName serviceCfg)
) (builtins.attrNames cfg.services);
nodeinfoLib = rec {
mkInfo = extraCode: name: cfg: ''
add_service("${name}", """
info["local_address"] = "${nbLib.addressWithPort cfg.address cfg.port}"
'' + mkIfOnionPort name (onionPort: ''
set_onion_address(info, "${name}", ${onionPort})
'') + extraCode + ''
""")
'';
mkIfOnionPort = name: fn:
if onionServices ? ${name} then
fn (toString (builtins.elemAt onionServices.${name}.map 0).port)
else
"";
};
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inherit (config.services.tor.relay) onionServices;
in {
inherit options;
config = {
environment.systemPackages = optional cfg.enable script;
nix-bitcoin.nodeinfo.services = with nodeinfoLib; {
bitcoind = mkInfo "";
clightning = mkInfo ''
info["nodeid"] = shell("lightning-cli getinfo | jq -r '.id'")
if 'onion_address' in info:
info["id"] = f"{info['nodeid']}@{info['onion_address']}"
'';
lnd = mkInfo ''
info["nodeid"] = shell("lncli getinfo | jq -r '.identity_pubkey'")
'';
clightning-rest = mkInfo "";
electrs = mkInfo "";
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fulcrum = mkInfo "";
spark-wallet = mkInfo "";
btcpayserver = mkInfo "";
liquidd = mkInfo "";
joinmarket-ob-watcher = mkInfo "";
rtl = mkInfo "";
# Only add sshd when it has an onion service
sshd = name: cfg: mkIfOnionPort "sshd" (onionPort: ''
add_service("sshd", """set_onion_address(info, "sshd", ${onionPort})""")
'');
};
};
}