PhonePe Ruby on Rails Implementation

phonepe.rb

    @api_key = '099eb0cd-02cf-4e2a-8aca-3e6c6aff0399'
    @merchant_id = 'PGTESTPAYUAT'
    @key_index = 1


    # Step 2

    @payment_params = {
      'merchantId' => @merchant_id,
      'merchantTransactionId' => "MT7850590068188104",
      "merchantUserId"=>"MUID123",
      'amount' => 1000, # Amount in paisa (10 INR)
      'redirectUrl'=>"https://f092-2401-4900-5ad1-f30a-55a1-7293-2caa-8d2f.ngrok-free.app/callbacks/v1/confirmations/phonepe_confirmations",
      'redirectMode'=>"POST",
      'callbackUrl'=>"https://f092-2401-4900-5ad1-f30a-55a1-7293-2caa-8d2f.ngrok-free.app/callbacks/v1/confirmations/phonepe_confirmations",
      "merchantOrderId"=> "12345",
      "mobileNumber"=>"7317715517",
      "message"=>"Order description",
      "email"=>"test@snmmaurya.com",
      "shortName"=>"Test",
      "paymentInstrument"=> { 
        "type"=> "PAY_PAGE",
      }
    }

    # Step 3
    @base64_encoaded_payload = Base64.strict_encode64(JSON.pretty_generate(@payment_params))

    # step 4
    @combine_payload = "#{@base64_encoaded_payload}/pg/v1/pay#{@api_key}"
    @checksum = Digest::SHA256.hexdigest(@combine_payload)+"###1"

    # Step 5

    response = HTTP.headers("accept" => "application/json", "Content-Type" => "application/json", "X-VERIFY" => @checksum).post("https://api-preprod.phonepe.com/apis/pg-sandbox/pg/v1/pay", json: {request: @base64_encoaded_payload})
    @json_body = JSON.parse response.body
    
    use url to redirect for payment in the above response
    
    
    
    
    
    
  callback confirmations validations - 
      
  base64_encoaded_payload = params["response"]
  combine_payload = "#{base64_encoaded_payload}#{Pgs::PhonepeService::API_KEY}"
  checksum = Digest::SHA256.hexdigest(combine_payload)+"####{Pgs::PhonepeService::KEY_INDEX}"
  request.headers["X-VERIFY"] == checksum
        
  response = JSON.parse Base64.decode64 base64_encoaded_payload