nix-bitcoin/modules/lightning-loop.nix

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{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.services.lightning-loop;
nbLib = config.nix-bitcoin.lib;
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secretsDir = config.nix-bitcoin.secretsDir;
network = config.services.bitcoind.network;
rpclisten = "${cfg.rpcAddress}:${toString cfg.rpcPort}";
configFile = builtins.toFile "loop.conf" ''
datadir=${cfg.dataDir}
network=${network}
rpclisten=${rpclisten}
restlisten=${cfg.restAddress}:${toString cfg.restPort}
logdir=${cfg.dataDir}/logs
tlscertpath=${secretsDir}/loop-cert
tlskeypath=${secretsDir}/loop-key
lnd.host=${config.services.lnd.rpcAddress}:${toString config.services.lnd.rpcPort}
lnd.macaroonpath=${config.services.lnd.networkDir}/admin.macaroon
lnd.tlspath=${secretsDir}/lnd-cert
${optionalString (cfg.proxy != null) "server.proxy=${cfg.proxy}"}
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${cfg.extraConfig}
'';
in {
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options.services.lightning-loop = {
enable = mkEnableOption "lightning-loop";
rpcAddress = mkOption {
type = types.str;
default = "localhost";
description = "Address to listen for gRPC connections.";
};
rpcPort = mkOption {
type = types.port;
default = 11010;
description = "Port to listen for gRPC connections.";
};
restAddress = mkOption {
type = types.str;
default = cfg.rpcAddress;
description = "Address to listen for REST connections.";
};
restPort = mkOption {
type = types.port;
default = 8081;
description = "Port to listen for REST connections.";
};
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package = mkOption {
type = types.package;
default = config.nix-bitcoin.pkgs.lightning-loop;
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description = "The package providing lightning-loop binaries.";
};
dataDir = mkOption {
type = types.path;
default = "/var/lib/lightning-loop";
description = "The data directory for lightning-loop.";
};
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proxy = mkOption {
type = types.nullOr types.str;
default = if cfg.enforceTor then config.services.tor.client.socksListenAddress else null;
description = "host:port of SOCKS5 proxy for connnecting to the loop server.";
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};
extraConfig = mkOption {
type = types.lines;
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default = "";
example = ''
debuglevel=trace
'';
description = "Extra lines appended to the configuration file.";
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};
cli = mkOption {
default = pkgs.writeScriptBin "loop" ''
${cfg.package}/bin/loop \
--rpcserver ${rpclisten} \
--macaroonpath '${cfg.dataDir}/${network}/loop.macaroon' \
--tlscertpath '${secretsDir}/loop-cert' "$@"
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'';
description = "Binary to connect with the lightning-loop instance.";
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};
enforceTor = nbLib.enforceTor;
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};
config = mkIf cfg.enable {
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services.lnd.enable = true;
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environment.systemPackages = [ cfg.package (hiPrio cfg.cli) ];
systemd.tmpfiles.rules = [
"d '${cfg.dataDir}' 0770 ${config.services.lnd.user} ${config.services.lnd.group} - -"
];
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systemd.services.lightning-loop = {
wantedBy = [ "multi-user.target" ];
requires = [ "lnd.service" ];
after = [ "lnd.service" ];
serviceConfig = nbLib.defaultHardening // {
ExecStart = "${cfg.package}/bin/loopd --configfile=${configFile}";
User = config.services.lnd.user;
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Restart = "on-failure";
RestartSec = "10s";
ReadWritePaths = cfg.dataDir;
} // nbLib.allowedIPAddresses cfg.enforceTor;
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};
nix-bitcoin.secrets = {
loop-key.user = config.services.lnd.user;
loop-cert.user = config.services.lnd.user;
};
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};
}