feat(sia-demo): migrate to orderbook v2

lib/mm2/mm2_api/mm2_api.dart

@@ -789,7 +789,7 @@ class Mm2Api {
 
       return OrderbookResponse(
         request: request,
-        result: Orderbook.fromJson(json),
+        result: Orderbook.fromJson(json['result'] as Map<String, dynamic>),
       );
     } catch (e, s) {
       log(

lib/mm2/mm2_api/rpc/best_orders/best_orders.dart

@@ -38,7 +38,7 @@ class BestOrder {
       maxVolume: order.maxVolume,
       minVolume: order.minVolume ?? Rational.zero,
       coin: coin ?? order.base,
-      address: order.address ?? '',
+      address: order.address?.addressData ?? '',
       uuid: order.uuid ?? '',
     );
   }

lib/mm2/mm2_api/rpc/orderbook/orderbook_request.dart

@@ -15,9 +15,12 @@ class OrderbookRequest implements BaseRequest {
 
   @override
   Map<String, dynamic> toJson() => <String, dynamic>{
+        'mmrpc': '2.0',
         'userpass': userpass,
         'method': method,
-        'base': base,
-        'rel': rel,
+        'params': {
+          'base': base,
+          'rel': rel,
+        }
       };
 }

lib/model/orderbook/order.dart

@@ -25,16 +25,18 @@ class Order {
       base: json['coin'],
       rel: otherCoin,
       direction: direction,
-      address: json['address'],
+      address:
+          json['address'] != null ? Address.fromJson(json['address']) : null,
       uuid: json['uuid'],
       pubkey: json['pubkey'],
-      price: fract2rat(json['price_fraction']) ?? Rational.parse(json['price']),
-      maxVolume: fract2rat(json['base_max_volume_fraction']) ??
-          Rational.parse(json['base_max_volume']),
-      minVolume: fract2rat(json['base_min_volume_fraction']) ??
-          Rational.parse(json['base_min_volume']),
-      minVolumeRel: fract2rat(json['rel_min_volume_fraction']) ??
-          Rational.parse(json['rel_min_volume']),
+      price: fract2rat(json['price']['fraction']) ??
+          Rational.parse(json['price']['rational']),
+      maxVolume: fract2rat(json['base_max_volume']['fraction']) ??
+          Rational.parse(json['base_max_volume']['rational']),
+      minVolume: fract2rat(json['base_min_volume']['fraction']) ??
+          Rational.parse(json['base_min_volume']['rational']),
+      minVolumeRel: fract2rat(json['rel_min_volume']['fraction']) ??
+          Rational.parse(json['rel_min_volume']['rational']),
     );
   }
 
@@ -43,7 +45,7 @@ class Order {
   final OrderDirection direction;
   final Rational maxVolume;
   final Rational price;
-  final String? address;
+  final Address? address;
   final String? uuid;
   final String? pubkey;
   final Rational? minVolume;
@@ -58,3 +60,17 @@ enum OrderDirection { bid, ask }
 // This const is used to identify and highlight newly created
 // order preview in maker form orderbook (instead of isTarget flag)
 final String orderPreviewUuid = const Uuid().v1();
+
+class Address {
+  Address({required this.addressType, required this.addressData});
+
+  final String addressType;
+  final String addressData;
+
+  factory Address.fromJson(Map<String, dynamic> json) {
+    return Address(
+      addressData: json['address_data'],
+      addressType: json['address_type'],
+    );
+  }
+}

lib/model/orderbook/orderbook.dart

@@ -33,14 +33,14 @@ class Orderbook {
                 otherCoin: json['base'],
               ))
           .toList(),
-      bidsBaseVolTotal: fract2rat(json['total_bids_base_vol_fraction']) ??
-          Rational.parse(json['total_bids_base_vol']),
-      bidsRelVolTotal: fract2rat(json['total_bids_rel_vol_fraction']) ??
-          Rational.parse(json['total_bids_rel_vol']),
-      asksBaseVolTotal: fract2rat(json['total_asks_base_vol_fraction']) ??
-          Rational.parse(json['total_asks_base_vol']),
-      asksRelVolTotal: fract2rat(json['total_asks_rel_vol_fraction']) ??
-          Rational.parse(json['total_asks_rel_vol']),
+      bidsBaseVolTotal: fract2rat(json['total_bids_base_vol']['fraction']) ??
+          Rational.parse(json['total_bids_base_vol']['rational']),
+      bidsRelVolTotal: fract2rat(json['total_bids_rel_vol']['fraction']) ??
+          Rational.parse(json['total_bids_rel_vol']['rational']),
+      asksBaseVolTotal: fract2rat(json['total_asks_base_vol']['fraction']) ??
+          Rational.parse(json['total_asks_base_vol']['rational']),
+      asksRelVolTotal: fract2rat(json['total_asks_rel_vol']['fraction']) ??
+          Rational.parse(json['total_asks_rel_vol']['rational']),
       timestamp: json['timestamp'],
     );
   }

lib/views/dex/orderbook/orderbook_table_item.dart

@@ -33,8 +33,8 @@ class _OrderbookTableItemState extends State<OrderbookTableItem> {
   @override
   void initState() {
     _isPreview = widget.order.uuid == orderPreviewUuid;
-    _isTradeWithSelf =
-        widget.order.address == coinsBloc.getCoin(widget.order.rel)?.address;
+    _isTradeWithSelf = widget.order.address?.addressData ==
+        coinsBloc.getCoin(widget.order.rel)?.address;
     _style = const TextStyle(fontSize: 11, fontWeight: FontWeight.w500);
     _color = _isPreview
         ? theme.custom.targetColor