feat(project)!: support nixos-rebuild and hydra

3 files changed, 799 insertions, 0 deletions

diff --git a/modules/services/matrix-bridge/_mautrix-discord-module.nix b/modules/services/matrix-bridge/_mautrix-discord-module.nix
new file mode 100644
index 0000000..36cafe6
--- /dev/null
+++ b/modules/services/matrix-bridge/_mautrix-discord-module.nix
@@ -0,0 +1,205 @@
+{ config, pkgs, lib, ... }:
+
+with lib;
+
+let
+  dataDir = "/var/lib/mautrix-discord";
+  registrationFile = "${dataDir}/discord-registration.yaml";
+  cfg = config.services.mautrix-discord;
+  settingsFormat = pkgs.formats.json { };
+  settingsFile = "${dataDir}/config.json";
+  settingsFileUnsubstituted = settingsFormat.generate "mautrix-discord-config.json" cfg.settings;
+
+in
+{
+  options = {
+    services.mautrix-discord = {
+      enable = mkEnableOption (lib.mdDoc "Mautrix-discord, a Matrix-discord puppeting bridge.");
+
+      package = mkOption { type = types.package; default = pkgs.mautrix-discord; };
+
+      settings = mkOption rec {
+        apply = recursiveUpdate default;
+        inherit (settingsFormat) type;
+        default = {
+          homeserver = {
+            software = "standard";
+          };
+
+          appservice = rec {
+            database = "sqlite:///${dataDir}/mautrix-discord.db";
+            database_opts = { };
+            hostname = "localhost";
+            port = 8080;
+            address = "http://localhost:${toString port}";
+          };
+
+          bridge = {
+            permissions."*" = "relay";
+            relay.whitelist = [ ];
+            double_puppet_server_map = { };
+            login_shared_secret_map = { };
+          };
+
+          logging = {
+            min_level = "debug";
+            writers = [
+              {
+                type = "stdout";
+                format = "pretty-colored";
+              }
+            ];
+          };
+        };
+        example = literalExpression ''
+          {
+            homeserver = {
+              address = "http://localhost:8008";
+              domain = "public-domain.tld";
+            };
+
+            appservice.public = {
+              prefix = "/public";
+              external = "https://public-appservice-address/public";
+            };
+
+            bridge.permissions = {
+              "example.com" = "full";
+              "@admin:example.com" = "admin";
+            };
+          }
+        '';
+        description = lib.mdDoc ''
+          {file}`config.yaml` configuration as a Nix attribute set.
+          Configuration options should match those described in
+          [example-config.yaml](https://github.com/mautrix/discord/blob/master/discord/example-config.yaml).
+
+          Secret tokens should be specified using {option}`environmentFile`
+          instead of this world-readable attribute set.
+        '';
+      };
+
+      environmentFile = mkOption {
+        type = types.nullOr types.path;
+        default = null;
+        description = lib.mdDoc ''
+          File containing environment variables to be passed to the mautrix-discord service,
+          in which secret tokens can be specified securely by defining values for e.g.
+          `MAUTRIX_DISCORD_APPSERVICE_AS_TOKEN`,
+          `MAUTRIX_DISCORD_APPSERVICE_HS_TOKEN`,
+
+          These environment variables can also be used to set other options by
+          replacing hierarchy levels by `.`, converting the name to uppercase
+          and prepending `MAUTRIX_DISCORD_`.
+          For example, the first value above maps to
+          {option}`settings.appservice.as_token`.
+
+          The environment variable values can be prefixed with `json::` to have
+          them be parsed as JSON. For example, `login_shared_secret_map` can be
+          set as follows:
+          `MAUTRIX_DISCORD_BRIDGE_LOGIN_SHARED_SECRET_MAP=json::{"example.com":"secret"}`.
+        '';
+      };
+
+      serviceDependencies = mkOption {
+        type = with types; listOf str;
+        default = optional config.services.matrix-synapse.enable "matrix-synapse.service";
+        defaultText = literalExpression ''
+          optional config.services.matrix-synapse.enable "matrix-synapse.service"
+        '';
+        description = lib.mdDoc ''
+          List of Systemd services to require and wait for when starting the application service.
+        '';
+      };
+    };
+  };
+
+  config = mkIf cfg.enable {
+    users.users.mautrix-discord = {
+      isSystemUser = true;
+      group = "mautrix-discord";
+      home = dataDir;
+      description = "Mautrix-Discord bridge user";
+    };
+
+    users.groups.mautrix-discord = {};
+
+    systemd.services.mautrix-discord = {
+      description = "Mautrix-discord, a Matrix-discord puppeting bridge.";
+
+      wantedBy = [ "multi-user.target" ];
+      wants = [ "network-online.target" ] ++ cfg.serviceDependencies;
+      after = [ "network-online.target" ] ++ cfg.serviceDependencies;
+
+      preStart = ''
+        # substitute the settings file by environment variables
+        # in this case read from EnvironmentFile
+        test -f '${settingsFile}' && rm -f '${settingsFile}'
+        old_umask=$(umask)
+        umask 0177
+        ${pkgs.envsubst}/bin/envsubst \
+          -o '${settingsFile}' \
+          -i '${settingsFileUnsubstituted}' \
+        umask $old_umask
+
+        # generate the appservice's registration file if absent
+        if [ ! -f '${registrationFile}' ]; then
+          ${pkgs.mautrix-discord}/bin/mautrix-discord \
+            --generate-registration \
+            --config='${settingsFile}' \
+            --registration='${registrationFile}'
+        fi
+        chmod 640 ${registrationFile}
+
+        umask 0177
+        ${pkgs.yq}/bin/yq -s '.[0].appservice.as_token = .[1].as_token
+          | .[0].appservice.hs_token = .[1].hs_token
+          | .[0]' '${settingsFile}' '${registrationFile}' \
+          > '${settingsFile}.tmp'
+        mv '${settingsFile}.tmp' '${settingsFile}'
+        umask $old_umask
+      '';
+
+      serviceConfig = {
+        Type = "simple";
+        Restart = "on-failure";
+
+        LockPersonality = true;
+        MemoryDenyWriteExecute = true;
+        NoNewPrivileges = true;
+        ProtectSystem = "strict";
+        ProtectHome = true;
+        ProtectKernelTunables = true;
+        ProtectKernelModules = true;
+        ProtectKernelLogs = true;
+        ProtectControlGroups = true;
+        ProtectClock = true;
+        ProtectHostname = true;
+        RestrictRealtime = true;
+        RestrictSUIDSGID = true;
+
+        SystemCallArchitectures = "native";
+        SystemCallErrorNumber = "EPERM";
+        SystemCallFilter = ["@system-service"];
+
+        PrivateTmp = true;
+        PrivateDevices = true;
+        PrivateUsers = true;
+
+        User = "mautrix-discord";
+        Group = "mautrix-discord";
+        WorkingDirectory = dataDir;
+        StateDirectory = baseNameOf dataDir;
+        UMask = "0027";
+        EnvironmentFile = cfg.environmentFile;
+
+        ExecStart = ''
+          ${cfg.package}/bin/mautrix-discord \
+            --config='${settingsFile}' \
+            --registration='${registrationFile}'
+        '';
+      };
+      restartTriggers = [settingsFileUnsubstituted];
+    };
+  };
+}
diff --git a/modules/services/matrix-bridge/_mautrix-signal-module.nix b/modules/services/matrix-bridge/_mautrix-signal-module.nix
new file mode 100644
index 0000000..983d635
--- /dev/null
+++ b/modules/services/matrix-bridge/_mautrix-signal-module.nix
@@ -0,0 +1,204 @@
+{ config, pkgs, lib, ... }:
+
+with lib;
+
+let
+  dataDir = "/var/lib/mautrix-signal";
+  registrationFile = "${dataDir}/signal-registration.yaml";
+  cfg = config.services.mautrix-signal;
+  settingsFormat = pkgs.formats.json { };
+  settingsFile = "${dataDir}/config.json";
+  settingsFileUnsubstituted =
+    settingsFormat.generate "mautrix-signal-config.json" cfg.settings;
+
+in
+{
+  # NOTE(2024-01-11): Upstream has been moved to a Go version.
+  # Environment-based credential setting might not work.
+  options = {
+    services.mautrix-signal = {
+      enable = mkEnableOption (lib.mdDoc "Mautrix-Signal, a Matrix-Signal puppeting bridge.");
+
+      package = mkOption { type = types.package; default = pkgs.mautrix-signal; };
+
+      settings = mkOption rec {
+        apply = recursiveUpdate default;
+        inherit (settingsFormat) type;
+        default = {
+          homeserver = {
+            software = "standard";
+          };
+
+          appservice = rec {
+            database = "sqlite:///${dataDir}/mautrix-signal.db";
+            database_opts = { };
+            hostname = "localhost";
+            port = 8080;
+            address = "http://localhost:${toString port}";
+          };
+
+          signal.socket_path = config.services.signald.socketPath;
+
+          bridge = {
+            permissions."*" = "relay";
+            relay.whitelist = [ ];
+            double_puppet_server_map = { };
+            login_shared_secret_map = { };
+          };
+
+          logging = {
+            min_level = "debug";
+            writers = [
+              {
+                type = "stdout";
+                format = "pretty-colored";
+              }
+            ];
+          };
+        };
+        example = literalExpression ''
+          {
+            homeserver = {
+              address = "http://localhost:8008";
+              domain = "public-domain.tld";
+            };
+
+            appservice.public = {
+              prefix = "/public";
+              external = "https://public-appservice-address/public";
+            };
+
+            bridge.permissions = {
+              "example.com" = "full";
+              "@admin:example.com" = "admin";
+            };
+          }
+        '';
+        description = lib.mdDoc ''
+          {file}`config.yaml` configuration as a Nix attribute set.
+          Configuration options should match those described in
+          [example-config.yaml](https://github.com/mautrix/signal/blob/master/signal/example-config.yaml).
+
+          Secret tokens should be specified using {option}`environmentFile`
+          instead of this world-readable attribute set.
+        '';
+      };
+
+      environmentFile = mkOption {
+        type = types.nullOr types.path;
+        default = null;
+        description = lib.mdDoc ''
+          File containing environment variables to be passed to the mautrix-signal service,
+          in which secret tokens can be specified securely by defining values for e.g.
+          `MAUTRIX_SIGNAL_APPSERVICE_AS_TOKEN`,
+          `MAUTRIX_SIGNAL_APPSERVICE_HS_TOKEN`,
+
+          These environment variables can also be used to set other options by
+          replacing hierarchy levels by `.`, converting the name to uppercase
+          and prepending `MAUTRIX_SIGNAL_`.
+          For example, the first value above maps to
+          {option}`settings.appservice.as_token`.
+
+          The environment variable values can be prefixed with `json::` to have
+          them be parsed as JSON. For example, `login_shared_secret_map` can be
+          set as follows:
+          `MAUTRIX_SIGNAL_BRIDGE_LOGIN_SHARED_SECRET_MAP=json::{"example.com":"secret"}`.
+        '';
+      };
+
+      serviceDependencies = mkOption {
+        type = with types; listOf str;
+        default = optional config.services.matrix-synapse.enable "matrix-synapse.service";
+        defaultText = literalExpression ''
+          optional config.services.matrix-synapse.enable "matrix-synapse.service"
+        '';
+        description = lib.mdDoc ''
+          List of Systemd services to require and wait for when starting the application service.
+        '';
+      };
+    };
+  };
+
+  config = mkIf cfg.enable {
+    services.signald.enable = true;
+
+    systemd.services.mautrix-signal = {
+      description = "Mautrix-Signal, a Matrix-Signal puppeting bridge.";
+
+      wantedBy = [ "multi-user.target" ];
+      wants = [ "network-online.target" ] ++ cfg.serviceDependencies;
+      after = [ "network-online.target" ] ++ cfg.serviceDependencies;
+      path = [ pkgs.lottieconverter pkgs.ffmpeg-full ];
+
+      # TODO(2023-01-11): Still relevant in Go version?
+      # mautrix-signal tries to generate a dotfile in the home directory of
+      # the running user if using a postgresql database:
+      #
+      #  File "python3.10/site-packages/asyncpg/connect_utils.py", line 257, in _dot_postgre>
+      #    return (pathlib.Path.home() / '.postgresql' / filename).resolve()
+      #  File "python3.10/pathlib.py", line 1000, in home
+      #    return cls("~").expanduser()
+      #  File "python3.10/pathlib.py", line 1440, in expanduser
+      #    raise RuntimeError("Could not determine home directory.")
+      # RuntimeError: Could not determine home directory.
+      environment.HOME = dataDir;
+
+      preStart = ''
+        # substitute the settings file by environment variables
+        # in this case read from EnvironmentFile
+        test -f '${settingsFile}' && rm -f '${settingsFile}'
+        old_umask=$(umask)
+        umask 0177
+        ${pkgs.envsubst}/bin/envsubst \
+          -o '${settingsFile}' \
+          -i '${settingsFileUnsubstituted}' \
+        umask $old_umask
+
+        # generate the appservice's registration file if absent
+        if [ ! -f '${registrationFile}' ]; then
+          ${cfg.package}/bin/mautrix-signal \
+            --generate-registration \
+            --config='${settingsFile}' \
+            --registration='${registrationFile}'
+        fi
+        chmod 640 ${registrationFile}
+
+        umask 0177
+        ${pkgs.yq}/bin/yq -s '.[0].appservice.as_token = .[1].as_token
+          | .[0].appservice.hs_token = .[1].hs_token
+          | .[0]' '${settingsFile}' '${registrationFile}' \
+          > '${settingsFile}.tmp'
+        mv '${settingsFile}.tmp' '${settingsFile}'
+        umask $old_umask
+      '';
+
+      serviceConfig = {
+        Type = "simple";
+        Restart = "always";
+
+        ProtectSystem = "strict";
+        ProtectHome = true;
+        ProtectKernelTunables = true;
+        ProtectKernelModules = true;
+        ProtectControlGroups = true;
+
+        DynamicUser = true;
+        SupplementaryGroups = [ "signald" ];
+        PrivateTmp = true;
+        WorkingDirectory = cfg.package; # necessary for the database migration scripts to be found
+        StateDirectory = baseNameOf dataDir;
+        UMask = "0027";
+        EnvironmentFile = cfg.environmentFile;
+
+        ExecStart = ''
+          ${cfg.package}/bin/mautrix-signal \
+            --config='${settingsFile}'
+        '';
+
+      restartTriggers = [settingsFileUnsubstituted];
+      };
+    };
+  };
+
+  # meta.maintainers = with maintainers; [ boppyt ];
+}
diff --git a/modules/services/matrix-bridge/default.nix b/modules/services/matrix-bridge/default.nix
new file mode 100644
index 0000000..4d53223
--- /dev/null
+++ b/modules/services/matrix-bridge/default.nix
@@ -0,0 +1,390 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+let
+  cfg = config.modules.services.matrix-bridge;
+in
+{
+  imports = [
+    ./_mautrix-signal-module.nix
+    ./_mautrix-discord-module.nix
+  ];
+
+  options.modules.services.matrix-bridge = {
+    enable = mkEnableOption "matrix-bridge";
+    domain = mkOption { type = types.str; };
+    realHost = mkOption { type = types.str; default = "matrix.${cfg.domain}"; };
+    secrets.mautrix-envs = mkOption { type = types.path; description = "path to the mautrix-* environment file"; };
+  };
+
+  config = mkIf cfg.enable {
+    sops.secrets.double-puppet-as-token = { };
+    sops.secrets.double-puppet-hs-token = { };
+
+    sops.templates."double-puppet-registration.yaml".content = ''
+      id: doublepuppet
+      url:
+      as_token: ${config.sops.placeholder.double-puppet-as-token}
+      hs_token: ${config.sops.placeholder.double-puppet-hs-token}
+      sender_localpart: 55e126746dad19e50d9c4e646b6f5ac9ba21b346a24b840330cd8d8a1d65ce80
+      rate_limited: false
+      namespaces:
+        users:
+          - regex: '@.*:exotic\.sh'
+            exclusive: false
+    '';
+
+    services.mautrix-telegram = {
+      enable = true;
+
+      environmentFile = cfg.secrets.mautrix-envs;
+      serviceDependencies = [ "matrix-synapse.service" ];
+
+      settings = {
+        homeserver.address = "https://${cfg.realHost}";
+        homeserver.domain = cfg.domain;
+        homeserver.verify_ssl = true;
+        appservice = {
+          address = "http://localhost:29317";
+          hostname = "localhost";
+          port = 29317;
+          database = "postgres:///mautrix-telegram?host=/run/postgresql";
+          bot_avatar = "mxc://maunium.net/tJCRmUyJDsgRNgqhOgoiHWbX";
+          id = "telegram";
+          max_body_size = 1;
+          provisioning.enabled = false;
+        };
+        bridge = {
+          alias_template = "tg_{groupname}";
+          username_templace = "tg_{userid}";
+          allow_matrix_login = true;
+          bot_messages_as_notices = true;
+          catch_up = true;
+          plaintext_highlights = true;
+          startup_sync = true;
+          animated_stickers = {
+            target = "webp";
+            convert_from_webm = true;
+          };
+          encryption = {
+            allow = true;
+            default = true;
+            require = true;
+            allow_key_sharing = true;
+          };
+          # NOTE: python bridge - managed via env variable
+          # login_shared_secret_map = {
+          #   "${cfg.domain}" = "as_token:$DOUBLE_PUPPET_AS_TOKEN";
+          # };
+          permissions = {
+            "@sef:exotic.sh" = "admin";
+            "exotic.sh" = "full";
+          };
+        };
+      };
+    };
+
+    services.mautrix-signal = {
+      enable = true;
+      package = pkgs.mautrix-signal;
+
+      environmentFile = cfg.secrets.mautrix-envs;
+      serviceDependencies = [ "matrix-synapse.service" ];
+
+      settings = {
+        homeserver.address = "https://${cfg.realHost}";
+        homeserver.domain = cfg.domain;
+        homeserver.verify_ssl = true;
+        appservice = {
+          address = "http://localhost:29318";
+          port = 29318;
+          database = "postgres:///mautrix-signal?host=/run/postgresql";
+          bot_avatar = "mxc://maunium.net/wPJgTQbZOtpBFmDNkiNEMDUp";
+          id = "signal";
+          max_body_size = 1;
+          provisioning.enabled = false;
+        };
+
+        signal = {
+          avatar_dir = "/var/lib/signald/avatars";
+          data_dir = "/var/lib/signald/data";
+        };
+
+        bridge = {
+          alias_template = "sig_{groupname}";
+          username_templace = "sig_{userid}";
+          allow_matrix_login = true;
+          catch_up = true;
+          plaintext_highlights = true;
+          startup_sync = true;
+          animated_stickers = {
+            target = "webp";
+            convert_from_webm = true;
+          };
+          encryption = {
+            allow = true;
+            default = true;
+            require = true;
+            allow_key_sharing = true;
+          };
+          login_shared_secret_map = {
+            "${cfg.domain}" = "as_token:$DOUBLE_PUPPET_AS_TOKEN";
+          };
+          permissions = {
+            "@sef:exotic.sh" = "admin";
+            "exotic.sh" = "full";
+          };
+        };
+      };
+    };
+
+    services.mautrix-whatsapp = {
+      enable = true;
+      environmentFile = cfg.secrets.mautrix-envs;
+      serviceDependencies = [ "matrix-synapse.service" ];
+
+      settings = {
+        homeserver.address = "https://${cfg.realHost}";
+        homeserver.domain = cfg.domain;
+        homeserver.verify_ssl = true;
+        appservice = {
+          address = "http://localhost:29319";
+          hostname = "localhost";
+          port = 29319;
+          database = {
+            type = "postgres";
+            uri = "postgres://mautrix-whatsapp:@/mautrix-whatsapp?host=/run/postgresql";
+          };
+          bot_avatar = "mxc://maunium.net/NeXNQarUbrlYBiPCpprYsRqr";
+          id = "whatsapp";
+          max_body_size = 1;
+          provisioning.enabled = false;
+        };
+
+        bridge = {
+          alias_template = "wa_{groupname}";
+          username_templace = "wa_{userid}";
+          personal_filtering_spaces = true;
+          delivery_receipts = true;
+          identity_change_notices = true;
+          history_sync = {
+            backfill = false; # MSC2716
+            request_full_sync = true;
+          };
+          send_presence_on_typing = true;
+          double_puppet_server_map = { };
+          login_shared_secret_map = {
+            "${cfg.domain}" = "as_token:$DOUBLE_PUPPET_AS_TOKEN";
+          };
+          private_chat_portal_meta = true;
+          mute_bridging = true;
+          pinned_tag = "m.favourite";
+          archive_tag = "m.lowpriority";
+          allow_user_invite = true;
+          disappearing_messages_in_groups = true;
+          url_previews = true;
+          encryption = {
+            allow = true;
+            default = true;
+            require = true;
+            allow_key_sharing = true;
+          };
+          sync_manual_marked_unread = true;
+          force_active_delivery_receipts = true;
+          parallel_member_sync = true;
+          extev_polls = true;
+          send_whatsapp_edits = true;
+          permissions = {
+            "@sef:exotic.sh" = "admin";
+            "exotic.sh" = "full";
+          };
+        };
+      };
+    };
+
+    services.mautrix-discord = {
+      enable = true;
+      environmentFile = cfg.secrets.mautrix-envs;
+      serviceDependencies = [ "matrix-synapse.service" ];
+
+      settings = {
+        homeserver.address = "https://${cfg.realHost}";
+        homeserver.domain = cfg.domain;
+        homeserver.verify_ssl = true;
+        appservice = {
+          address = "http://localhost:29320";
+          port = 29320;
+          database = {
+            type = "postgres";
+            uri = "postgres://mautrix-discord:@/mautrix-discord?host=/run/postgresql";
+          };
+          bot_avatar = "mxc://maunium.net/nIdEykemnwdisvHbpxflpDlC";
+          id = "discord";
+          max_body_size = 1;
+          provisioning.enabled = false;
+        };
+
+        bridge = {
+          username_template = "dsc_{{.}}";
+          delivery_receipts = true;
+          encryption = {
+            allow = true;
+            default = true;
+            require = true;
+            allow_key_sharing = true;
+          };
+          login_shared_secret_map = {
+            "${cfg.domain}" = "as_token:$DOUBLE_PUPPET_AS_TOKEN";
+          };
+          permissions = {
+            "@sef:exotic.sh" = "admin";
+            "exotic.sh" = "full";
+          };
+        };
+      };
+    };
+
+    services.matrix-appservice-irc = {
+      enable = true;
+      registrationUrl = "http://localhost:29321";
+      port = 29321;
+
+      settings = {
+        homeserver.url = "https://${cfg.realHost}";
+        homeserver.domain = cfg.domain;
+        homeserver.dropMatrixMessagesAfterSecs = 600; # 10 minutes
+
+        database.engine = "postgres";
+        database.connectionString = "postgres://matrix-appservice-irc:@/matrix-appservice-irc?host=/run/postgresql";
+
+        ircService.servers = let
+          # nix-community/nur-combined/repos/colinsane/hosts/by-name/servo/services/matrix/irc.nix@b2e96d5
+          ircServer = { name, additionalAddresses ? [], sasl ? true, port ? 6697}:
+            let lowerName = lib.toLower name;
+          in {
+            inherit name additionalAddresses sasl port;
+            ssl = true;
+            # Disable bridging of Matrix bots
+            botConfig.enabled = false;
+            dynamicChannels = {
+              enabled = true;
+              aliasTemplate = "#irc_${lowerName}_$CHANNEL";
+              published = false;
+              federate = false;
+            };
+            ircClients = {
+              nickTemplate = "$DISPLAY[m]";
+              allowNickChanges = true;
+              realNameFormat = "reverse-mxid";
+              lineLimit = 20;
+              # Safeguard: don't flood servers
+              maxClients = 2;
+              idleTimeout = 0;
+              concurrentReconnectLimit = 2;
+              reconnectIntervalMs = 60000;
+              kickOn = {
+                # only kick Matrix user from room when user quits
+                channelJoinFailure = false;
+                ircConnectionFailure = false;
+                userQuit = true;
+              };
+            };
+            matrixClients.userTemplate = "@irc_${lowerName}_$NICK";
+
+            "@sef:exotic.sh" = "admin";
+
+            memberShipLists = {
+              enabled = true;
+              # NOTE: when serving lots of Matrix users, these configs should
+              # be changed to reduce strain on IRC servers
+              global = {
+                ircToMatrix = {
+                  initial = true;
+                  incremental = true;
+                  requireMatrixJoined = false;
+                };
+                matrixToIrc = {
+                  initial = true;
+                  incremental = true;
+                };
+                # always bridge users, even if idle
+                ignoreIdleUsersOnStartup.enabled = false;
+              };
+              bridgeInfoState = {
+                enabled = true;
+                initial = true;
+              };
+            };
+          };
+        in {
+          "irc.libera.chat" = ircServer {
+            name = "libera";
+            # sasl = false;
+          };
+          "irc.oftc.net" = ircServer {
+            name = "oftc";
+            # sasl = false;
+          };
+        };
+      };
+    };
+
+    # HACK: https://github.com/NixOS/nixpkgs/issues/273929
+    systemd.services.matrix-appservice-irc.serviceConfig.SystemCallFilter = lib.mkForce ''
+      @system-service @pkey ~@privileged @resources @chown
+    '';
+
+
+    modules.persistence.directories = [
+      "/var/lib/private/mautrix-telegram"
+      "/var/lib/private/mautrix-signal"
+      "/var/lib/private/mautrix-whatsapp"
+      "/var/lib/private/mautrix-discord"
+      "/var/lib/matrix-appservice-irc"
+      "/var/lib/signald"
+    ];
+
+    modules.services.postgresql.enable = true;
+    services.postgresql.ensureDatabases = [ "mautrix-telegram" "mautrix-signal" "mautrix-whatsapp" "mautrix-discord" "matrix-appservice-irc" ];
+    services.postgresql.ensureUsers = [
+      {
+        name = "mautrix-telegram";
+        ensureDBOwnership = true;
+      }
+      {
+        name = "mautrix-signal";
+        ensureDBOwnership = true;
+      }
+      {
+        name = "mautrix-whatsapp";
+        ensureDBOwnership = true;
+      }
+      {
+        name = "mautrix-discord";
+        ensureDBOwnership = true;
+      }
+      {
+        name = "matrix-appservice-irc";
+        ensureDBOwnership = true;
+      }
+    ];
+
+    systemd.services.matrix-synapse.serviceConfig.LoadCredential = [
+      "mautrix-telegram:/var/lib/mautrix-telegram/telegram-registration.yaml"
+      "mautrix-signal:/var/lib/mautrix-signal/signal-registration.yaml"
+      "mautrix-whatsapp:/var/lib/mautrix-whatsapp/whatsapp-registration.yaml"
+      "mautrix-discord:/var/lib/mautrix-discord/discord-registration.yaml"
+      "double-puppet:${config.sops.templates."double-puppet-registration.yaml".path}"
+      "appservice-irc:/var/lib/matrix-appservice-irc/registration.yml"
+    ];
+
+    services.matrix-synapse.settings.app_service_config_files = [
+      "/run/credentials/matrix-synapse.service/mautrix-telegram"
+      "/run/credentials/matrix-synapse.service/mautrix-signal"
+      "/run/credentials/matrix-synapse.service/mautrix-whatsapp"
+      "/run/credentials/matrix-synapse.service/mautrix-discord"
+      "/run/credentials/matrix-synapse.service/double-puppet"
+      "/run/credentials/matrix-synapse.service/appservice-irc"
+    ];
+  };
+}