I’m making a POST request using the Http package in my Flutter application. I tested the same request on the Api sandbox website and Postman and got a 202 Accepted response. However, in Flutter, I always get a 400 Bad Request.
I also tried with HttpClient, but still got 400 Bad Request.
import 'package:http/http.dart';
import 'package:uuid/uuid.dart';
import 'package:wave_app/env/secrets.dart';
import 'package:wave_app/models/momo_token.dart';
import 'package:http_client/http_client.dart';
String url = "https://sandbox.momodeveloper.mtn.com/collection/v1_0/requesttopay";
var uuid = Uuid();
String requestId = uuid.v4();
MomoToken token = await _createMomoNewTokenCollection();
String auth = "Bearer " + token.accessToken;
Map<String, String> headers = {
"Authorization": auth,
"X-Target-Environment": "sandbox",
"X-Reference-Id": requestId,
"Content-Type": "application/json",
"Ocp-Apim-Subscription-Key": momoCollectionSubscriptionKey
};
String jsonBody = '{"amount": "5","currency": "EUR", "externalId": "123", "payer": {"partyIdType": "MSISDN","partyId": "46733123454"}, "payerMessage": "tripId-123456","payeeNote": "driverId-654321"}';
HttpClient httpClient = new HttpClient();
HttpClientRequest request = await httpClient.postUrl(Uri.parse(url));
request.headers.set("Authorization", "Bearer " + token.accessToken);
request.headers.set('content-type', 'application/json');
request.headers.set("X-Target-Environment", "sandbox");
request.headers.set("X-Reference-Id", requestId);
request.headers.set("Ocp-Apim-Subscription-Key", momoCollectionSubscriptionKey);
request.add(utf8.encode(jsonBody));
HttpClientResponse response = await request.close();
print("STATUS CODE " + response.statusCode.toString() + " " + response.reasonPhrase);
String reply = await response.transform(utf8.decoder).join();
print("REPLY " + reply);
httpClient.close();
I’m using the same variables for the request in both Api sandbox website, Postman and Flutter, and the API doc is here. I’m not sure what I’m doing wrong here. Any help would be greatly appreciated!