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path: root/nixos/modules/services/hardware/trezord.nix
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{ config, lib, pkgs, ... }:

with lib;
let
  cfg = config.services.trezord;
in {

  ### docs

  meta = {
    doc = ./trezord.xml;
  };

  ### interface

  options = {
    services.trezord = {
      enable = mkOption {
        type = types.bool;
        default = false;
        description = ''
          Enable Trezor bridge daemon, for use with Trezor hardware bitcoin wallets.
        '';
      };

      emulator.enable = mkOption {
        type = types.bool;
        default = false;
        description = ''
          Enable Trezor emulator support.
          '';
       };

      emulator.port = mkOption {
        type = types.port;
        default = 21324;
        description = ''
          Listening port for the Trezor emulator.
          '';
      };
    };
  };

  ### implementation

  config = mkIf cfg.enable {
    services.udev.packages = [ pkgs.trezor-udev-rules ];

    systemd.services.trezord = {
      description = "Trezor Bridge";
      after = [ "network.target" ];
      wantedBy = [ "multi-user.target" ];
      path = [];
      serviceConfig = {
        Type = "simple";
        ExecStart = "${pkgs.trezord}/bin/trezord-go ${optionalString cfg.emulator.enable "-e ${builtins.toString cfg.emulator.port}"}";
        User = "trezord";
      };
    };

    users.users.trezord = {
      group = "trezord";
      description = "Trezor bridge daemon user";
      isSystemUser = true;
    };

    users.groups.trezord = {};
  };
}