add removed max maker vol models

Author: takenagain

lib/mm2/mm2_api/mm2_api.dart

@@ -2,6 +2,7 @@ import 'dart:async';
 import 'dart:convert';
 
 import 'package:komodo_defi_types/komodo_defi_types.dart';
+import 'package:rational/rational.dart';
 import 'package:web_dex/bloc/coins_bloc/coins_repo.dart';
 import 'package:web_dex/mm2/mm2.dart';
 import 'package:web_dex/mm2/mm2_api/mm2_api_nft.dart';
@@ -86,7 +87,7 @@ class Mm2Api {
   Future<String?> getBalance(String abbr) async {
     dynamic response;
     try {
-      response = await _call(MyBalanceReq(coin: abbr));
+      response = await _mm2.call(MyBalanceReq(coin: abbr));
     } catch (e, s) {
       log(
         'Error getting balance $abbr: ${e.toString()}',
@@ -113,74 +114,6 @@ class Mm2Api {
     return json['balance'];
   }
 
-  Future<MaxMakerVolResponse?> getMaxMakerVol(String abbr) async {
-    dynamic response;
-    try {
-      response = await _call(MaxMakerVolRequest(coin: abbr));
-    } catch (e, s) {
-      log(
-        'Error getting max maker vol $abbr: ${e.toString()}',
-        path: 'api => getMaxMakerVol => _call',
-        trace: s,
-        isError: true,
-      );
-      return _fallbackToBalance(abbr);
-    }
-
-    Map<String, dynamic> json;
-    try {
-      json = jsonDecode(response);
-    } catch (e, s) {
-      log(
-        'Error parsing of max maker vol $abbr response: ${e.toString()}',
-        path: 'api => getMaxMakerVol => jsonDecode',
-        trace: s,
-        isError: true,
-      );
-      return _fallbackToBalance(abbr);
-    }
-
-    final error = json['error'];
-    if (error != null) {
-      log(
-        'Error parsing of max maker vol $abbr response: ${error.toString()}',
-        path: 'api => getMaxMakerVol => error',
-        isError: true,
-      );
-      return _fallbackToBalance(abbr);
-    }
-
-    try {
-      return MaxMakerVolResponse.fromJson(json['result']);
-    } catch (e, s) {
-      log(
-        'Error constructing MaxMakerVolResponse for $abbr: ${e.toString()}',
-        path: 'api => getMaxMakerVol => fromJson',
-        trace: s,
-        isError: true,
-      );
-      return _fallbackToBalance(abbr);
-    }
-  }
-
-  Future<MaxMakerVolResponse?> _fallbackToBalance(String abbr) async {
-    final balance = await getBalance(abbr);
-    if (balance == null) {
-      log(
-        'Failed to retrieve balance for fallback construction of MaxMakerVolResponse for $abbr',
-        path: 'api => _fallbackToBalance',
-        isError: true,
-      );
-      return null;
-    }
-
-    final balanceValue = MaxMakerVolResponseValue(decimal: balance);
-    return MaxMakerVolResponse(
-      volume: balanceValue,
-      balance: balanceValue,
-    );
-  }
-
   Future<MaxTakerVolResponse?> _fallbackToBalanceTaker(String abbr) async {
     final balance = await getBalance(abbr);
     if (balance == null) {

lib/mm2/mm2_api/rpc/max_maker_vol/max_maker_vol_req.dart

@@ -0,0 +1,20 @@
+class MaxMakerVolRequest {
+  MaxMakerVolRequest({
+    required this.coin,
+  });
+
+  static const String method = 'max_maker_vol';
+  final String coin;
+  late String userpass;
+
+  Map<String, dynamic> toJson() {
+    return <String, dynamic>{
+      'method': method,
+      'mmrpc': '2.0',
+      'userpass': userpass,
+      'params': {
+        'coin': coin,
+      },
+    };
+  }
+}

lib/mm2/mm2_api/rpc/max_maker_vol/max_maker_vol_response.dart

@@ -0,0 +1,30 @@
+class MaxMakerVolResponse {
+  MaxMakerVolResponse({
+    required this.volume,
+    required this.balance,
+  });
+
+  final MaxMakerVolResponseValue volume;
+  final MaxMakerVolResponseValue balance;
+
+  factory MaxMakerVolResponse.fromJson(Map<String, dynamic> json) =>
+      MaxMakerVolResponse(
+        volume: MaxMakerVolResponseValue.fromJson(json['volume']),
+        balance: MaxMakerVolResponseValue.fromJson(json['balance']),
+      );
+}
+
+class MaxMakerVolResponseValue {
+  MaxMakerVolResponseValue({
+    required this.decimal,
+  });
+
+  final String decimal;
+
+  factory MaxMakerVolResponseValue.fromJson(Map<String, dynamic> json) =>
+      MaxMakerVolResponseValue(decimal: json['decimal']);
+
+  Map<String, String> toJson() => <String, String>{
+        'decimal': decimal,
+      };
+}