124 lines
4.1 KiB
Nix
124 lines
4.1 KiB
Nix
{ config, lib, pkgs, ... }:
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let
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cfg = config.services.dcrd;
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settingsFormat = pkgs.formats.ini {
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listsAsDuplicateKeys = true;
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};
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networkPorts = {
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mainnet = 9108;
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testnet = 19108;
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simnet = 18555;
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regnet = 18655;
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};
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effectivePort = if cfg.port == null then networkPorts.${cfg.network} else cfg.port;
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# dcrd requires settings to be lowercase
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lowercaseKeys = attrs: lib.mapAttrs' (k: v: { name = lib.strings.toLower k; value = v; }) attrs;
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baseAppOptions =
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{}
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// (if cfg.network == "testnet" then { testnet = true; }
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else if cfg.network == "simnet" then { simnet = true; }
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else if cfg.network == "regnet" then { regnet = true; }
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else {})
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// lib.optionalAttrs (cfg.port != null || cfg.listenAddress != "0.0.0.0") {
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listen = "${cfg.listenAddress}:${toString effectivePort}";
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};
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combinedAppOptions = lib.recursiveUpdate baseAppOptions (lowercaseKeys cfg.settings);
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finalSettings = { "Application Options" = combinedAppOptions; };
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generatedConfig = settingsFormat.generate "dcrd.conf" finalSettings;
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in
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{
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options.services.dcrd = with lib; {
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enable = mkEnableOption "Decred daemon";
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package = mkOption {
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type = types.package;
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default = pkgs.dcrd;
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description = "Package providing the dcrd binary";
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};
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network = mkOption {
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type = types.enum [ "mainnet" "testnet" "simnet" "regnet" ];
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default = "mainnet";
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description = "Select which network to run: mainnet, testnet, simnet, or regnet";
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};
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port = mkOption {
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type = types.nullOr types.port;
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default = null;
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description = "P2P port override. Null uses the default for the selected network";
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};
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listenAddress = mkOption {
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type = types.str;
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default = "0.0.0.0";
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description = "IP address to bind to listen for connections";
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};
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openFirewall = mkOption {
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type = types.bool;
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default = true;
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description = "Open P2P port in the firewall";
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};
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configFile = mkOption {
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type = types.nullOr types.path;
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default = null;
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description = "Absolute path to a dcrd.conf to use instead of the generated config. When set, the generated settings are ignored.";
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};
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user = mkOption {
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type = types.str;
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default = "dcrd";
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description = "User to run dcrd as";
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};
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group = mkOption {
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type = types.str;
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default = cfg.user;
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description = "Group to run dcrd as";
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};
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settings = mkOption {
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type = types.submodule {
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freeformType = types.attrsOf settingsFormat.lib.types.atom;
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};
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default = {};
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example = {
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externalip = [ "203.0.113.42" ];
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rpclisten = [ "127.0.0.1:9109" "192.168.1.100:9109" ];
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rpcuser = "dcrd";
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rpcpass = "hunter2";
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txindex = true;
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proxy = "127.0.0.1:9050";
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};
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description = ''
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Options that accept multiple values (like rpclisten, externalip,
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listen, addpeer, miningaddr, altdnsnames, whitelist) should be
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specified as lists.
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Single-value options (like rpcuser, rpcpass, proxy, txindex)
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should be specified as strings or booleans.
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'';
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};
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};
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config = lib.mkIf cfg.enable {
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users.groups.${cfg.group} = {};
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users.users.${cfg.user} = {
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isSystemUser = true;
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group = cfg.group;
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description = "Decred daemon user";
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};
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networking.firewall.allowedTCPPorts = lib.mkIf cfg.openFirewall [ effectivePort ];
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systemd.services.dcrd = {
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description = "Decred full node";
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after = [ "network-online.target" ];
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wants = [ "network-online.target" ];
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wantedBy = [ "multi-user.target" ];
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serviceConfig = {
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User = cfg.user;
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Group = cfg.group;
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StateDirectory = "dcrd";
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StateDirectoryMode = "0750";
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ExecStart = ''${lib.getExe cfg.package} --appdata=/var/lib/dcrd --configfile=${if cfg.configFile != null then cfg.configFile else generatedConfig}'';
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Restart = "on-failure";
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RestartSec = 5;
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};
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restartTriggers = [ generatedConfig ] ++ lib.optional (cfg.configFile != null) cfg.configFile;
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};
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};
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}
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