Unfortunately, i couldnt get mautrix-whatsapp going. It dies with a message,

mautrix-whatsapp-pre-start[3797520]: Legacy bridge config detected, but hacky network config migrator is not set
mautrix-whatsapp.service: Control process exited, code=exited, status=1/FAILURE

In reply to @rajil:rajils.com
Is there any example i can look at?

This is the config which did not work,

  services.mautrix-whatsapp = {
    enable = true; 

    settings = {
      homeserver = {
        address = "http://127.0.0.1:${toString matrixPort}";
        domain = serverName;
      };

      appservice = {
        address = "http://127.0.0.1:29318";
        hostname = "127.0.0.1";
        port = 29318;

        database = {
          type = "postgres";
          uri = "postgresql:///mautrix-whatsapp?host=/run/postgresql";
        };

        id = "whatsapp";
        bot = {
          username = "whatsappbot";
          displayname = "WhatsApp Bridge Bot";
        };
      };

      bridge = {
        username_template = "whatsapp_{{.}}";
        displayname_template = "{{or .BusinessName .PushName .JID}} (WA)";
        command_prefix = "!wa";

        # Portal settings
        private_chat_portal_meta = true;
        personal_filtering_spaces = true;

        # Status broadcast settings
        enable_status_broadcast = true;
        disable_status_broadcast_send = true;
        mute_status_broadcast = true;
        status_broadcast_tag = "m.lowpriority";

        permissions = {
          "*" = "relay";
          "${serverName}" = "user";
          "@user:${serverName}" = "admin";
        };

        relay.enabled = false;

        # History sync settings
        history_sync = {
          backfill = true;
          max_initial_conversations = 10;
          request_full_sync = false;
        };
      };

      # Matrix settings
      matrix = {
        federate_rooms = true;
      };
      # Encryption allowed but not default
      encryption = {
        allow = true;
        default = false;
        require = false;
      };

      logging = {
        min_level = "info";
        writers = [
          {
            type = "stdout";
            format = "pretty-colored";
          }
        ];
      };
    };

    environmentFile = config.sops.templates."mautrix-whatsapp.env".path;
  };

https://cgit.rory.gay/Rory-Open-Architecture.git/tree/host/Rory-nginx/services/matrix/synapse/workers

heres mine