This is an async rust library for accessing the mpesa apis.

To get an access token

use serde::{Serialize, Deserialize};
use base64::{Engine as _, engine::general_purpose};

#[derive(Debug. Serialize, Deserialize)]
struct Response {
    access_token: String,
    expires_in: i32,
}

#[tokio::main]
async fn main() {
    let consumer_key = "Your consumer key here".to_string();
    let consumer_secret = "Your consumer secret".to_string();
    let client = reqwest::Client::new();
    let auth = format!("{}:{}", consumer_key, consumer_secret);
    let auth = general_purpose::URL_SAFE.encode(auth);
    let body = client.get("mpesa token url here")
        .header("Authorization", format!("Basic {}", auth))
        .send()
        .await
        .unwrap();
    
    let bytes = body
        .bytes()
        .await
        .unwrap();

    let response: Response = serde_json::from_slice(bytes.as_ref())
        .unwrap();

    println!({:?}, response);
}

Making a request

An Example of a Mpesa Express (STK Push) request:

let config = MpesaConfig::new().with_access_token();

/// Create a client to make requests with default config or you can provide your own check the docs for more info
let client = Client::with_config(config);

/// all fields must be provided as strings
let request = ExpressPushRequestArgs::default()
    .PartyA("")
    .PartyB("")
    .Amount("")
    .Password(shortcode, passkey, timestamp)
    .AccountReference("")
    .TransactionType("")
    .BusinessShortCode("")
    .CallbackURL("")
    .TransactionDesc("")
    .Timestamp("")
    .PhoneNumber("")
    .build()
    .unwrap();

let response = client
    ///the appropriate method is required for the respective api you are trying to access.
    .stkpush()
    .create(request)
    .await
    .unwrap();

println!("{:?}", response);

Methods to make requests to the mpesa api

To access different request use the following methods to access the apis mpesa provides.

1. Account Balance

   AccountBalanceRequestArgs::Default()
   

2. B2C

   B2CRequestArgs::Default()
   

3. Business Buy Goods

   BusinessBuyGoodsRequestArgs::Default()
   

4. Business PayBill

   BusinessPayBillRequestArgs::Default()
   

5. Mpesa Express Query

   ExpressQueryRequestArgs::Default()
   

6. QR code

   QRRequestArgs::Default()
   

7. Reverse Transaction

   ReversalRequestArgs::Default()
   

8. Mpesa Express (STK Push)

   ExpressPushRequestArgs::Default()
   

9. Transaction Status

   TransactionStatusRequestArgs::Default()
   

10. Tax Remit

    TaxRemitRequestArgs::Default()
    

This library still works for those targeting the wasm architecture.