I would be happy to help you solve your problem. Here is an article with a step -by -step guide on how to obtain the signature of the binance API for Ethereum transactions using Flutter:
Obtaining the signature of the binance API: a step by step guide
The Binance API provides a means of accessing various data flows and APIs, including real -time market data, commercial information, etc. When you work with the Binance API in your Flutter application, you must get an API key and generate an API signature that checks your identity. In this article, we will browse the process of obtaining the signature of the Ethereum API using the flutter_binance package.
Prerequisites:
- You have a binance account with sufficient funds.
- You have registered with the Binance API on their website.
- You have an API key and an API secret (customer and customer secret ID).
- You have configured the
flutter_binancepackage in your flutter project.
Step 1: Get the request parameters
When you are about to apply for the Binance API, you must include the request parameters with the termination point of the API. In this case, we will use the Ethereum API termination point to obtain transaction information.
`Dart
Thong queryparams = 'timestamp =' + datetime.now ().
'
This will generate a query parameter with a horny in milliseconds.
Step 2: Create an HTTP customer
To make requests to the Binance API, you must create a clientHTTP”. We will use the HTTP package for this purpose.
`Dart
Import 'package: http / http.dar' as http;
Future
Final apiendpoint = '
final headers = {{
'X-AP-KEY': 'Your_api_key',
'X-depi-secret': 'your_api_secret',
};
Var Response = Wait http.get (
Show.parse (apiendpoint),
Headers: headers,
));
if (response.staturuscode == 200) {
// Analysis the JSON response
Final survey = JSONDECODE (Response.Body);
// Projects data as required
Print ('Transaction information:');
Print (weld);
// refers a success message
Return scaffolding (
Appbar: Appartub (
Title: Text ("Info de la Transaction Ethereum"),
),,
Body: Center (
Child: column (
Mainaxisalignment: mainaxisalignment.Center,
Children: [
Text ("Transaction information successfully recovered!"),
Sizetbox (height: 20),
Raised button (
Ones resource: () {
Navigator.push (
context,
MATERIALPAGEROUTE (BUILDER: (Context) => Customdialog ()),
));
},
Child: "Open a personalized dialog box for subsequent treatment"),
),,
],
),,
),,
));
} Other {
// Manage errors
Return scaffolding (
Appbar: Appartub (
Title: text ("error occurred"),
),,
Body: Center (
Child: column (
Mainaxisalignment: mainaxisalignment.Center,
Children: [
Text ("an error occurred during the request. Please check your API key and secrecy"),
Sizetbox (height: 20),
Raised button (
Ones resource: () {
Navigator.pop (context);
},
Child: text ("return to the previous screen"),
),,
],
),,
),,
));
}
}
'
Step 3: Sign the request
To check your identity and obtain an API signature, you must sign the request with a private key.
- Create a newPrivate_Key.pem
file in the root directory of your project.
- Generate a private key using the DART library: Convert 'or a tool like OpenSSL.
Bash
OpenSSL Genrsa --out Private_Key.Pem 2048
` ‘
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