nix-bitcoin/modules/clightning-rest.nix

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{ config, lib, pkgs, ... }:
with lib;
let
options.services.clightning-rest = {
enable = mkEnableOption "lightning-rest";
port = mkOption {
type = types.port;
default = 3001;
description = "REST server port.";
};
docPort = mkOption {
type = types.port;
default = 4001;
description = "Swagger API documentation server port.";
};
dataDir = mkOption {
type = types.path;
default = "/var/lib/clightning-rest";
description = "The data directory for clightning-rest.";
};
extraConfig = mkOption {
type = types.attrs;
default = {};
example = {
DOMAIN = "mynode.org";
};
description = ''
Extra config options.
See: https://github.com/Ride-The-Lightning/c-lightning-REST#option-1-via-config-file-cl-rest-configjson
'';
};
# Used by ./rtl.nix
group = mkOption {
readOnly = true;
default = clightning.group;
description = "The group under which clightning-rest is run.";
};
# Rest server address.
# Not configurable. The server always listens on all interfaces:
# https://github.com/Ride-The-Lightning/c-lightning-REST/issues/84
# Required by netns-isolation.
address = mkOption {
internal = true;
default = "0.0.0.0";
};
tor.enforce = nbLib.tor.enforce;
};
cfg = config.services.clightning-rest;
nbLib = config.nix-bitcoin.lib;
nbPkgs = config.nix-bitcoin.pkgs;
inherit (config.services)
bitcoind
clightning;
configFile = builtins.toFile "clightning-rest-config" (builtins.toJSON ({
PORT = cfg.port;
DOCPORT = cfg.docPort;
LNRPCPATH = "${clightning.dataDir}/${bitcoind.makeNetworkName "bitcoin" "regtest"}/lightning-rpc";
EXECMODE = "production";
PROTOCOL = "https";
RPCCOMMANDS = ["*"];
} // cfg.extraConfig));
in {
inherit options;
config = mkIf cfg.enable {
services.clightning.enable = true;
systemd.tmpfiles.rules = [
"d '${cfg.dataDir}' 0770 ${clightning.user} ${cfg.group} - -"
];
systemd.services.clightning-rest = mkIf cfg.enable {
wantedBy = [ "multi-user.target" ];
requires = [ "clightning.service" ];
after = [ "clightning.service" ];
path = [ pkgs.openssl ];
environment.CL_REST_STATE_DIR = cfg.dataDir;
preStart = ''
ln -sfn ${configFile} cl-rest-config.json
'';
postStart = ''
while [[ ! -e '${cfg.dataDir}/certs/access.macaroon' ]]; do
sleep 0.1
done
'';
serviceConfig = nbLib.defaultHardening // {
# clightning-rest reads the config file from the working directory
WorkingDirectory = cfg.dataDir;
ExecStart = "${nbPkgs.clightning-rest}/bin/cl-rest";
# Show "clightning-rest" instead of "node" in the journal
SyslogIdentifier = "clightning-rest";
User = clightning.user;
Restart = "on-failure";
RestartSec = "10s";
ReadWritePaths = cfg.dataDir;
} // nbLib.allowedIPAddresses cfg.tor.enforce
// nbLib.nodejs;
};
};
}