liquidd: make regtest capable

modules/liquid.nix

@@ -9,8 +9,10 @@ let
   secretsDir = config.nix-bitcoin.secretsDir;
   pidFile = "${cfg.dataDir}/liquidd.pid";
   configFile = pkgs.writeText "elements.conf" ''
-    chain=liquidv1
-    ${optionalString cfg.testnet "testnet=1"}
+    chain=${config.services.bitcoind.makeNetworkName "liquidv1" ''
+      regtest
+      [regtest]'' # Add [regtest] config section
+    }
     ${optionalString (cfg.dbCache != null) "dbcache=${toString cfg.dbCache}"}
     ${optionalString (cfg.prune != null) "prune=${toString cfg.prune}"}
     ${optionalString (cfg.validatepegin != null) "validatepegin=${if cfg.validatepegin then "1" else "0"}"}
@@ -140,11 +142,6 @@ in {
           default = "liquidrpc";
           description = "Username for JSON-RPC connections";
       };
-      testnet = mkOption {
-        type = types.bool;
-        default = false;
-        description = "Whether to use the test chain.";
-      };
       proxy = mkOption {
         type = types.nullOr types.str;
         default = if cfg.enforceTor then config.services.tor.client.socksListenAddress else null;

test/tests.nix

@@ -183,6 +183,7 @@ let
       imports = [ scenarios.regtestBase ];
       services.clightning.enable = true;
       test.features.clightningPlugins = true;
+      services.liquidd.enable = true;
       services.spark-wallet.enable = true;
       services.lnd.enable = true;
       services.lightning-loop.enable = true;