From 5d1004e322984e764d86a38563e9e5248bfe0688 Mon Sep 17 00:00:00 2001
From: Dinu B <32189942+dvinubius@users.noreply.github.com>
Date: Tue, 15 Nov 2022 21:34:37 +0200
Subject: [PATCH] Fix Response Headers to pass the tests

There is a test for each of the three post requests (contract call, get balance, transfer) which expects `'Content-Type'` to be `'application/json'` on the response header. (The test description is misleading though, because is refers to the request header)

Express automatically adds `'charset=UTF-8'`, which makes the test fail.

The changes in this PR fix the issue.
---
 .../node/provider.js                                           | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/build-a-web3-client-side-package-for-your-dapp/node/provider.js b/build-a-web3-client-side-package-for-your-dapp/node/provider.js
index 874ac2b..ce30184 100644
--- a/build-a-web3-client-side-package-for-your-dapp/node/provider.js
+++ b/build-a-web3-client-side-package-for-your-dapp/node/provider.js
@@ -31,6 +31,7 @@ app.post('/call-smart-contract', async (req, res) => {
 
   try {
     const result = await callSmartContract(id, method, args, address);
+    res.contentType('application/json');
     res.json({ result });
   } catch (e) {
     logover.error(e);
@@ -53,6 +54,7 @@ app.post('/get-balance', async (req, res) => {
   if (!balance) {
     return res.status(404).json({ error: 'Account not found' });
   }
+  res.contentType('application/json');
   return res.json({ result: balance });
 });
 
@@ -68,6 +70,7 @@ app.post('/transfer', async (req, res) => {
   }
   try {
     await transfer({ from, to, amount });
+    res.contentType('application/json');
     res.json({ result: 'success' });
   } catch (e) {
     logover.error(e);