From 0a2cfab6d4858798ac0c4953c50cd57144801bb0 Mon Sep 17 00:00:00 2001
From: weiwei <54241621+weishirongzhen@users.noreply.github.com>
Date: Tue, 18 Jun 2024 21:55:51 +0800
Subject: [PATCH] Fixed http provider send json rpc failed (#456)

Fixed http provider send json rpc failed and make sure response id is always parse-able
---
 packages/polkadart/lib/provider.dart | 18 +++++++++++-------
 1 file changed, 11 insertions(+), 7 deletions(-)

diff --git a/packages/polkadart/lib/provider.dart b/packages/polkadart/lib/provider.dart
index 5491b44a..c9f1504e 100644
--- a/packages/polkadart/lib/provider.dart
+++ b/packages/polkadart/lib/provider.dart
@@ -75,16 +75,20 @@ class HttpProvider extends Provider {
 
   @override
   Future<RpcResponse> send(String method, List<dynamic> params) async {
-    final response = await http.post(url, body: {
-      'id': (++_sequence).toString(),
-      'jsonrpc': '2.0',
-      'method': method,
-      'params': params,
-    });
+    final response = await http.post(url,
+        body: jsonEncode(
+          {
+            'id': (++_sequence).toString(),
+            'jsonrpc': '2.0',
+            'method': method,
+            'params': params,
+          },
+        ),
+        headers: {'Content-Type': 'application/json'});
     final data = jsonDecode(response.body);
 
     return RpcResponse(
-      id: data['id'],
+      id: int.tryParse(data['id'].toString()) ?? -1,
       result: data['result'],
     );
   }