117 lines
4.0 KiB
Nix
117 lines
4.0 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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cfg = config.services.clightning;
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inherit (config) nix-bitcoin-services;
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configFile = pkgs.writeText "config" ''
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autolisten=${if cfg.autolisten then "true" else "false"}
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network=bitcoin
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${optionalString (cfg.proxy != null) "proxy=${cfg.proxy}"}
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always-use-proxy=${if cfg.always-use-proxy then "true" else "false"}
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${optionalString (cfg.bind-addr != null) "bind-addr=${cfg.bind-addr}"}
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bitcoin-rpcuser=${cfg.bitcoin-rpcuser}
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'';
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in {
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options.services.clightning = {
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enable = mkOption {
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type = types.bool;
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default = false;
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description = ''
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If enabled, the clightning service will be installed.
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'';
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};
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autolisten = mkOption {
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type = types.bool;
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default = false;
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description = ''
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If enabled, the clightning service will listen.
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'';
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};
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proxy = mkOption {
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type = types.nullOr types.str;
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default = null;
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description = "Set a socks proxy to use to connect to Tor nodes (or for all connections if *always-use-proxy* is set)";
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};
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always-use-proxy = mkOption {
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type = types.bool;
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default = false;
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description = ''
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Always use the *proxy*, even to connect to normal IP addresses (you can still connect to Unix domain sockets manually). This also disables all DNS lookups, to avoid leaking information.
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'';
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};
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bind-addr = mkOption {
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type = types.nullOr types.str;
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default = null;
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description = "Set an IP address or UNIX domain socket to listen to";
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};
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bitcoin-rpcuser = mkOption {
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type = types.str;
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description = ''
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Bitcoin RPC user
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'';
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};
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dataDir = mkOption {
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type = types.path;
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default = "/var/lib/clightning";
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description = "The data directory for clightning.";
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};
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cli = mkOption {
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readOnly = true;
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default = pkgs.writeScriptBin "lightning-cli"
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# Switch user because c-lightning doesn't allow setting the permissions of the rpc socket
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# https://github.com/ElementsProject/lightning/issues/1366
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''
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exec sudo -u clightning ${pkgs.nix-bitcoin.clightning}/bin/lightning-cli --lightning-dir='${cfg.dataDir}' "$@"
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'';
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description = "Binary to connect with the clightning instance.";
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};
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enforceTor = nix-bitcoin-services.enforceTor;
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};
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config = mkIf cfg.enable {
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users.users.clightning = {
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description = "clightning User";
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group = "clightning";
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extraGroups = [ "bitcoinrpc" ];
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home = cfg.dataDir;
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};
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users.groups.clightning = {};
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systemd.services.clightning = {
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description = "Run clightningd";
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path = [ pkgs.nix-bitcoin.bitcoind ];
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wantedBy = [ "multi-user.target" ];
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requires = [ "bitcoind.service" ];
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after = [ "bitcoind.service" ];
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preStart = ''
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mkdir -m 0770 -p ${cfg.dataDir}
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cp ${configFile} ${cfg.dataDir}/config
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chown -R 'clightning:clightning' '${cfg.dataDir}'
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# give group read access to allow using lightning-cli
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chmod u=rw,g=r,o= ${cfg.dataDir}/config
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# The RPC socket has to be removed otherwise we might have stale sockets
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rm -f ${cfg.dataDir}/lightning-rpc
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echo "bitcoin-rpcpassword=$(cat /secrets/bitcoin-rpcpassword)" >> '${cfg.dataDir}/config'
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'';
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serviceConfig = {
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PermissionsStartOnly = "true";
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ExecStart = "${pkgs.nix-bitcoin.clightning}/bin/lightningd --lightning-dir=${cfg.dataDir}";
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User = "clightning";
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Restart = "on-failure";
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RestartSec = "10s";
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} // nix-bitcoin-services.defaultHardening
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// (if cfg.enforceTor
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then nix-bitcoin-services.allowTor
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else nix-bitcoin-services.allowAnyIP
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);
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# Wait until the rpc socket appears
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postStart = ''
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while read f; do [[ $f == lightning-rpc ]] && break; done \
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< <(${pkgs.inotifyTools}/bin/inotifywait --quiet --monitor -e create,moved_to --format '%f' '${cfg.dataDir}')
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'';
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};
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};
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}
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