I will be happy to help your troubleshooting. Here’s an article with a step-by-step guide to obtain a Binance API signature for Ethereum events with Flutter:
To acquire the signature of the Binance application subscription: Step-by-step guide
The Binance application interface provides a way to use different data feeds and application subscriptions, including real-time market information, shopping information and much more. When working with the Binance application in the Flutter application, you need to get an application connector and create a signature of your certificate certificate. In this article, we will go through the signature of the Ethereum application subscription using the “flutter_binance” package.
Prerequisites:
- You have a Binance account with enough funds.
- You have registered for the Binance application subscription on their website.
- You have received the API key and API secret (customer ID and customer secret).
- You have set your Flutter project on the
flutter_binancepackage.
Step 1: Get query parameters
Once you have requested a Binance application subscription, you need to incorporate the questionnaire parameters in the API terminal. In this case, we use the Ethereum API end point to obtain transaction data.
`Dart
String QueryParams = ‘Timestamp =’ + DateTime.NOW (). Milliskondssepoch.tostring ();
`
This produces a survey parameter with timestamp in milliseconds.
Step 2: Create HTTP Customer
If you want to make requests for the Binance API, you need to create a http client. We use the HTTP package for this purpose.
`Dart
Importing ‘package: http/http.dart’ as http;
Future
Final apendpoint = ‘
Final titles = {
‘X-API-key’: ‘Your_api_Key’,
‘X-API-Scret’: ‘Your_api_secret’,
};
Var reply = wait http.get (
Uri.parers (apindpoint),
Headlines: headlines,
)
If (Response.statuscode == 200) {
// Jänä JSON response
Final jsondata = jsondecode (response.body);
// process information as needed
Print (‘Event Information:’);
print (jsondata);
// Return success message
Return the racks (
AppBar: AppBar (
Title: Text (‘Ethereum Transaction Info’),
),
Frame: the center (
Child: Column (
Mainaxisalignment: Mainaxisalignment.center,
Children: [
Text (‘Event Information has been successfully retrieved!’),
Full box (height: 20),
Raised (
onpressed: () {
Navigator.push (
context,
MaterialpAGEROUTE (Builder: (Context) => CustomDialog ()),
)
},
Child: Text (‘Open a custom dialog for further processing’),
),
],],
),
),
)
} Else {
// handle errors
Return the racks (
AppBar: AppBar (
Title: Text (‘Error happened’),
),
Frame: the center (
Child: Column (
Mainaxisalignment: Mainaxisalignment.center,
Children: [
Text (‘Inserting an error occurred. Check your application subscription key and secret’),
Full box (height: 20),
Raised (
onpressed: () {
Navigator.pop (context);
},
Child: Text (‘returns to the previous screen’),
),
],],
),
),
)
}
}
`
Step 3: Sign Request
If you want to verify your identity and get an API signature, you need to sign the request with a private key.
- Create a new file in the root directory of the project of the project.
- Create a private key using the
darts: Convertilibrary or tool such as Openssl.
`Bash
Openssl Genrsa -out private_key.pem 2048
`
3.
