Nano-GPT (#1336)

* init

* updates

* nano updates

* updates

* updates

* [skipci] wip deep link changes

* fix deep links

* minor fix

* add reminder message on buy and exchange routes

* [skip ci] font fixes

* review updates

* [skip ci] minor fix

* save

* fixes

* minor code cleanup

* minor potential fix

cw_nano/lib/banano_balance.dart

@@ -1,12 +1,28 @@
 import 'package:cw_core/balance.dart';
 import 'package:nanoutil/nanoutil.dart';
 
+BigInt stringAmountToBigIntBanano(String amount) {
+  return BigInt.parse(NanoAmounts.getAmountAsRaw(amount, NanoAmounts.rawPerBanano));
+}
+
 class BananoBalance extends Balance {
   final BigInt currentBalance;
   final BigInt receivableBalance;
 
   BananoBalance({required this.currentBalance, required this.receivableBalance}) : super(0, 0);
 
+  BananoBalance.fromFormattedString(
+      {required String formattedCurrentBalance, required String formattedReceivableBalance})
+      : currentBalance = stringAmountToBigIntBanano(formattedCurrentBalance),
+        receivableBalance = stringAmountToBigIntBanano(formattedReceivableBalance),
+        super(0, 0);
+
+  BananoBalance.fromRawString(
+      {required String currentBalance, required String receivableBalance})
+      : currentBalance = BigInt.parse(currentBalance),
+        receivableBalance = BigInt.parse(receivableBalance),
+        super(0, 0);
+
   @override
   String get formattedAvailableBalance {
     return NanoAmounts.getRawAsUsableString(currentBalance.toString(), NanoAmounts.rawPerBanano);

cw_nano/lib/nano_balance.dart

@@ -1,7 +1,7 @@
 import 'package:cw_core/balance.dart';
 import 'package:nanoutil/nanoutil.dart';
 
-BigInt stringAmountToBigInt(String amount) {
+BigInt stringAmountToBigIntNano(String amount) {
   return BigInt.parse(NanoAmounts.getAmountAsRaw(amount, NanoAmounts.rawPerNano));
 }
 
@@ -13,8 +13,8 @@ class NanoBalance extends Balance {
 
   NanoBalance.fromFormattedString(
       {required String formattedCurrentBalance, required String formattedReceivableBalance})
-      : currentBalance = stringAmountToBigInt(formattedCurrentBalance),
-        receivableBalance = stringAmountToBigInt(formattedReceivableBalance),
+      : currentBalance = stringAmountToBigIntNano(formattedCurrentBalance),
+        receivableBalance = stringAmountToBigIntNano(formattedReceivableBalance),
         super(0, 0);
 
   NanoBalance.fromRawString(

cw_nano/lib/nano_client.dart

@@ -10,6 +10,7 @@ import 'package:nanodart/nanodart.dart';
 import 'package:cw_core/node.dart';
 import 'package:nanoutil/nanoutil.dart';
 import 'package:shared_preferences/shared_preferences.dart';
+import 'package:cw_nano/.secrets.g.dart' as secrets;
 
 class NanoClient {
   static const Map<String, String> CAKE_HEADERS = {
@@ -52,10 +53,19 @@ class NanoClient {
     }
   }
 
+  Map<String, String> getHeaders() {
+    if (_node!.uri == "https://rpc.nano.to") {
+      return CAKE_HEADERS..addAll({
+        "key": secrets.nano2ApiKey,
+      });
+    }
+    return CAKE_HEADERS;
+  }
+
   Future<NanoBalance> getBalance(String address) async {
     final response = await http.post(
       _node!.uri,
-      headers: CAKE_HEADERS,
+      headers: getHeaders(),
       body: jsonEncode(
         {
           "action": "account_balance",
@@ -82,7 +92,7 @@ class NanoClient {
     try {
       final response = await http.post(
         _node!.uri,
-        headers: CAKE_HEADERS,
+        headers: getHeaders(),
         body: jsonEncode(
           {
             "action": "account_info",
@@ -94,7 +104,7 @@ class NanoClient {
       final data = await jsonDecode(response.body);
       return AccountInfoResponse.fromJson(data as Map<String, dynamic>);
     } catch (e) {
-      print("error while getting account info");
+      print("error while getting account info $e");
       return null;
     }
   }
@@ -149,7 +159,7 @@ class NanoClient {
   Future<String> requestWork(String hash) async {
     final response = await http.post(
       _powNode!.uri,
-      headers: CAKE_HEADERS,
+      headers: getHeaders(),
       body: json.encode(
         {
           "action": "work_generate",
@@ -192,7 +202,7 @@ class NanoClient {
 
     final processResponse = await http.post(
       _node!.uri,
-      headers: CAKE_HEADERS,
+      headers: getHeaders(),
       body: processBody,
     );
 
@@ -351,7 +361,7 @@ class NanoClient {
     });
     final processResponse = await http.post(
       _node!.uri,
-      headers: CAKE_HEADERS,
+      headers: getHeaders(),
       body: processBody,
     );
 
@@ -367,7 +377,7 @@ class NanoClient {
     required String privateKey,
   }) async {
     final receivableResponse = await http.post(_node!.uri,
-        headers: CAKE_HEADERS,
+        headers: getHeaders(),
         body: jsonEncode({
           "action": "receivable",
           "account": destinationAddress,
@@ -417,7 +427,7 @@ class NanoClient {
   Future<List<NanoTransactionModel>> fetchTransactions(String address) async {
     try {
       final response = await http.post(_node!.uri,
-          headers: CAKE_HEADERS,
+          headers: getHeaders(),
           body: jsonEncode({
             "action": "account_history",
             "account": address,