129 lines
4.0 KiB
Nix
129 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.electrs;
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inherit (config) nix-bitcoin-services;
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secretsDir = config.nix-bitcoin.secretsDir;
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index-batch-size = "${if cfg.high-memory then "" else "--index-batch-size=10"}";
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jsonrpc-import = "${if cfg.high-memory then "" else "--jsonrpc-import"}";
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in {
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options.services.electrs = {
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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 electrs service will be installed.
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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/electrs";
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description = "The data directory for electrs.";
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};
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user = mkOption {
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type = types.str;
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default = "electrs";
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description = "The user as which to run electrs.";
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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 = "The group as which to run electrs.";
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};
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high-memory = 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 electrs service will sync faster on high-memory systems (≥ 8GB).
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'';
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};
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port = mkOption {
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type = types.ints.u16;
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default = 50001;
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description = "RPC port.";
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};
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onionport = mkOption {
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type = types.ints.u16;
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default = 50002;
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description = "Port on which to listen for tor client connections.";
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};
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nginxport = mkOption {
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type = types.ints.u16;
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default = 50003;
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description = "Port on which to listen for TLS client connections.";
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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.${cfg.user} = {
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description = "electrs User";
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group = cfg.group;
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extraGroups = [ "bitcoinrpc" "bitcoin"];
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home = cfg.dataDir;
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};
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users.groups.${cfg.group} = {};
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systemd.services.electrs = {
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description = "Run electrs";
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wantedBy = [ "multi-user.target" ];
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requires = [ "bitcoind.service" "nginx.service"];
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after = [ "bitcoind.service" ];
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# create shell script to start up electrs safely with password parameter
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preStart = ''
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mkdir -m 0770 -p ${cfg.dataDir}
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chown -R '${cfg.user}:${cfg.group}' ${cfg.dataDir}
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echo "${pkgs.nix-bitcoin.electrs}/bin/electrs -vvv ${index-batch-size} ${jsonrpc-import} --timestamp --db-dir ${cfg.dataDir} --daemon-dir /var/lib/bitcoind --cookie=${config.services.bitcoind.rpcuser}:$(cat ${secretsDir}/bitcoin-rpcpassword) --electrum-rpc-addr=127.0.0.1:${toString cfg.port}" > /run/electrs/startscript.sh
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'';
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serviceConfig = rec {
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RuntimeDirectory = "electrs";
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RuntimeDirectoryMode = "700";
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PermissionsStartOnly = "true";
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ExecStart = "${pkgs.bash}/bin/bash /run/${RuntimeDirectory}/startscript.sh";
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User = "electrs";
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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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};
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services.nginx = {
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enable = true;
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appendConfig = ''
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stream {
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upstream electrs {
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server 127.0.0.1:${toString config.services.electrs.port};
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}
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server {
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listen ${toString config.services.electrs.nginxport} ssl;
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proxy_pass electrs;
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ssl_certificate ${secretsDir}/nginx-cert;
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ssl_certificate_key ${secretsDir}/nginx-key;
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ssl_session_cache shared:SSL:1m;
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ssl_session_timeout 4h;
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ssl_protocols TLSv1 TLSv1.1 TLSv1.2 TLSv1.3;
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ssl_prefer_server_ciphers on;
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}
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}
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'';
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};
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systemd.services.nginx = {
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requires = [ "nix-bitcoin-secrets.target" ];
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after = [ "nix-bitcoin-secrets.target" ];
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};
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nix-bitcoin.secrets = rec {
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nginx-key = {
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user = "nginx";
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group = "root";
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};
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nginx-cert = nginx-key;
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};
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};
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}
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