Blockchain Development for Finance Projects

Writing a method to set the current user balance

The setBalance() method is called to set the current user balance. It is always invoked after a new transaction is submitted to the server. It calls the /customerinfo endpoint and updates the new balance to the app state, as follows:

1. We call the /customerinfo endpoint with the customer's userID from the app state, like this:

setBalance = () => { let app = this;  var url = 'http://'+ this.state.server +'/customerinfo'; fetch(url, { method: 'POST', headers: { 'Accept': 'application/json', 'Content-Type': 'application/json', },body: JSON.stringify({ userId : app.state.userId  })  }).then(function(response,error){

2. On receiving a response from the /customerinfo endpoint, we fetch the balance ...