allprojects {
    repositories {
      ...
      maven { url 'https://jitpack.io' }
    }
  }

    dependencies {
            implementation 'com.squareup.retrofit2:retrofit:2.5.0'
            implementation 'com.github.bensalcie:payhero-android-mpesa:0.1.6'
    }

     private var mApiClient: DarajaApiClient? = null //Intitialization before on create

         mApiClient = DarajaApiClient(
           "xxxconsumerkeyxxxxx",
           "xxxxxconsumersecretxxxx",
           Environment.SANDBOX
       )
       //use Environment.PRODUCTION when on production
     //get consumerkey and secret from https://developer.safaricom.co.ke/user/me/apps
         mApiClient!!.setIsDebug(true) //Set True to enable logging, false to disable.
         getAccessToken()//make request availabe and ready for processing.

    //Access token Method being called.
     private fun getAccessToken() {
     mApiClient!!.setGetAccessToken(true)
     mApiClient!!.mpesaService()!!.getAccessToken().enqueue(object : Callback<AccessToken> {
     override fun onResponse(call: Call<AccessToken?>, response: Response<AccessToken>) {
     if (response.isSuccessful) {
          mApiClient!!.setAuthToken(response.body()?.accessToken)
        }
          }
          override fun onFailure(call: Call<AccessToken?>, t: Throwable) {}
      })
        }

   btnDeposit.setOnClickListener {
              val amount = etAmount.text.toString()
              val phone =etPhone.text.toString()
                  if (amount.isNotEmpty() && phone.isNotEmpty()) {
                          btnDeposit.text = getString(R.string.processing)
                      performSTKPush(phone, amount)
                  } else {
                      etPhone.error = getString(R.string.errorm)
                      etAmount.error = getString(R.string.errorm)
                  }
              }
    private fun performSTKPush(amount: String, phone_number: String) {
          //Handle progresss here
    //credentials here are test credentials
          val timestamp = Utils.getTimestamp()
          val stkPush = STKPush("acc ref",amount,"business number","callback url",
              Utils.sanitizePhoneNumber(phone_number)!!,"business number",Utils.getPassword("business number", 
        "passkey", timestamp!!)!!
              , Utils.sanitizePhoneNumber(phone_number)!!,timestamp,"Trans. desc",Environment.TransactionType.CustomerPayBillOnline)
          mApiClient!!.setGetAccessToken(false)
           mApiClient!!.mpesaService()!!.sendPush(stkPush).enqueue(object : Callback<STKResponse> {
            override fun onResponse(call: Call<STKResponse>, response: Response<STKResponse>) {
                mProgressDialog!!.dismiss()
                try {
                    if (response.isSuccessful) {
                     if (response.body() != null) {
                    Log.d("PAYMENTS", "onResponse: Time to process, confirm etc : "+response.body().component1());
                      //handle response here
                      //response contains CheckoutRequestID,CustomerMessage,MerchantRequestID,ResponseCode,ResponseDescription
                          }
                   
                    } else {
                        //Timber.e("Response %s", response.errorBody()!!.string())
                    }
                } catch (e: Exception) {
                    e.printStackTrace()
                }
            }

            override fun onFailure(call: Call<STKResponse>, t: Throwable) {
                //mProgressDialog!!.dismiss()
                //Timber.e(t)
            }
        })
      }