nix-bitcoin/modules/lightning-pool.nix

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{ config, lib, pkgs, ... }:
with lib;
let
options.services.lightning-pool = {
enable = mkEnableOption "Lightning Pool, a marketplace for inbound lightning liquidity ";
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rpcAddress = mkOption {
type = types.str;
default = "localhost";
description = "Address to listen for gRPC connections.";
};
rpcPort = mkOption {
type = types.port;
default = 12010;
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 = 8281;
description = "Port to listen for REST connections.";
};
package = mkOption {
type = types.package;
default = config.nix-bitcoin.pkgs.lightning-pool;
defaultText = "config.nix-bitcoin.pkgs.lightning-pool";
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description = "The package providing lightning-pool binaries.";
};
dataDir = mkOption {
type = types.path;
default = "/var/lib/lightning-pool";
description = "The data directory for lightning-pool.";
};
proxy = mkOption {
type = types.nullOr types.str;
default = if cfg.tor.proxy then config.nix-bitcoin.torClientAddressWithPort else null;
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description = "host:port of SOCKS5 proxy for connnecting to the pool auction server.";
};
extraConfig = mkOption {
type = types.lines;
default = "";
example = ''
debuglevel=trace
'';
description = "Extra lines appended to the configuration file.";
};
cli = mkOption {
default = pkgs.writeScriptBin "pool" ''
exec ${cfg.package}/bin/pool \
--rpcserver ${nbLib.addressWithPort cfg.rpcAddress cfg.rpcPort} \
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--network ${network} \
--basedir '${cfg.dataDir}' "$@"
'';
defaultText = "(See source)";
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description = "Binary to connect with the lightning-pool instance.";
};
tor = nbLib.tor;
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};
cfg = config.services.lightning-pool;
nbLib = config.nix-bitcoin.lib;
lnd = config.services.lnd;
network = config.services.bitcoind.network;
configFile = builtins.toFile "pool.conf" ''
rpclisten=${cfg.rpcAddress}:${toString cfg.rpcPort}
restlisten=${cfg.restAddress}:${toString cfg.restPort}
${optionalString (cfg.proxy != null) "proxy=${cfg.proxy}"}
lnd.host=${lnd.rpcAddress}:${toString lnd.rpcPort}
lnd.macaroondir=${lnd.networkDir}
lnd.tlspath=${lnd.certPath}
${cfg.extraConfig}
'';
in {
inherit options;
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config = mkIf cfg.enable {
services.lnd.enable = true;
environment.systemPackages = [ cfg.package (hiPrio cfg.cli) ];
systemd.tmpfiles.rules = [
"d '${cfg.dataDir}' 0770 lnd lnd - -"
];
systemd.services.lightning-pool = {
wantedBy = [ "multi-user.target" ];
requires = [ "lnd.service" ];
after = [ "lnd.service" ];
preStart = ''
mkdir -p '${cfg.dataDir}/${network}'
ln -sfn ${configFile} '${cfg.dataDir}/${network}/poold.conf'
'';
serviceConfig = nbLib.defaultHardening // {
ExecStart = "${cfg.package}/bin/poold --basedir='${cfg.dataDir}' --network=${network}";
User = "lnd";
Restart = "on-failure";
RestartSec = "10s";
ReadWritePaths = [ cfg.dataDir ];
} // (nbLib.allowedIPAddresses cfg.tor.enforce)
// nbLib.allowNetlink; # required by gRPC-Go
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};
};
}