Tutorial: Make a single payment

This tutorial walks through how to create a UK domestic single payment with the Modelo Sandbox.


Get Institutions

1. Get Institutions

Optional - This step is optional as it is entirely possible to access account data without retrieving the Institution list, however it is often required to display a list of supported banks for your customer to choose which bank they would like to share their data from.

Note: All requests made to the Yapily API require basic authentication.

To display this list, use GET Institutions:

Request:

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curl --location --request GET 'https://api.yapily.com/institutions' \
  --header 'Authorization: Basic {authToken}'

Response:

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  "meta": {
    "tracingId": "acbb76db4ab8f4ac7f039d000456c13f",
    "count": 1
  },
  "data": [
    {
      "id": "modelo-sandbox",
      "name": "Modelo Sandbox",
      "fullName": "Modelo Sandbox",
      "countries": [
        {
          "displayName": "United Kingdom",
          "countryCode2": "GB"
        }
      ],
      "environmentType": "SANDBOX",
      "credentialsType": "OPEN_BANKING_UK_AUTO",
      "media": [
        {
          "source": "https://images.yapily.com/image/ce2bfdbf-1ae2-4919-ab7b-e8b3d5e93b36?size=0",
          "type": "icon"
        },
        {
          "source": "https://images.yapily.com/image/ca502f24-d6df-4785-b4b8-1034b100af77?size=0",
          "type": "logo"
        }
      ],
      "features": [
        "INITIATE_ACCOUNT_REQUEST",
        "ACCOUNT_REQUEST_DETAILS",
        "EXISTING_PAYMENTS_DETAILS",
        "ACCOUNT_BALANCES",
        "CREATE_BULK_PAYMENT",
        "ACCOUNT_PERIODIC_PAYMENTS",
        "ACCOUNT_STATEMENTS",
        "INITIATE_BULK_PAYMENT",
        "ACCOUNT_STATEMENT",
        "ACCOUNT",
        "INITIATE_DOMESTIC_PERIODIC_PAYMENT",
        "INITIATE_SINGLE_PAYMENT_SORTCODE",
        "ACCOUNT_DIRECT_DEBITS",
        "ACCOUNTS",
        "ACCOUNT_TRANSACTIONS",
        "EXISTING_PAYMENT_INITIATION_DETAILS",
        "CREATE_DOMESTIC_SINGLE_PAYMENT",
        "INITIATE_DOMESTIC_SINGLE_PAYMENT",
        "ACCOUNT_STATEMENT_FILE",
        "CREATE_INTERNATIONAL_SINGLE_PAYMENT",
        "IDENTITY",
        "CREATE_DOMESTIC_SCHEDULED_PAYMENT",
        "INITIATE_DOMESTIC_SCHEDULED_PAYMENT",
        "CREATE_SINGLE_PAYMENT_SORTCODE",
        "ACCOUNT_TRANSACTIONS_WITH_MERCHANT",
        "INITIATE_INTERNATIONAL_SINGLE_PAYMENT",
        "PERIODIC_PAYMENT_FREQUENCY_EXTENDED",
        "ACCOUNT_SCHEDULED_PAYMENTS",
        "CREATE_DOMESTIC_PERIODIC_PAYMENT"
      ]
    }
  ]
}
  • Each Institution returned contains a logo, name, id and a list of supported features. As we want to allow the customer to perform a UK Domestic Single Payment, we can offer any institution that supports the feature CREATE_DOMESTIC_SINGLE_PAYMENT .
  • This information can be leveraged in a third party application to allow the user to select the bank they wish to make the payment from.
  • Once the user selects a bank, the id Institution should be stored to use in the next step.

PIS Authorisation

2. Authorisation

After obtaining the institution-id and confirming that the bank supports the ability to make a domestic payment, the next step is to generate an authorisation-url that is used to redirect the user to their chosen bank and to authorise the payment request.

To do this, execute Create Payment Authorisation:

Request:

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curl --location --request POST 'https://api.yapily.com/payment-auth-requests' \
  --header 'Content-Type: application/json' \
  --header 'Authorization: Basic {authToken}' \
  --data-raw '{
    "applicationUserId": "single-payment-tutorial",
    "institutionId": "modelo-sandbox",
    "callback": "https://display-parameters.com/",
    "paymentRequest": {
      "type": "DOMESTIC_PAYMENT",
      "reference": "Bills Coffee Shop",
      "paymentIdempotencyId": "{uniqueValue}",
      "amount": {
        "amount": 8.70,
        "currency": "GBP"
      },
      "payee": {
        "name": "BILLS COFFEE LTD",
        "accountIdentifications": [
          {
            "type": "ACCOUNT_NUMBER",
            "identification": "{accountNumber}"
          },
          {
            "type": "SORT_CODE",
            "identification": "{sortCode}"
          }
        ],
        "address": {
            "country": "GB"
        }
      }
    }
  }'

Response:

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{
  "meta": {
    "tracingId": "611f74cb4f3205d983ebb2fca59d0847"
  },
  "data": {
    "id": "af563bac-e50a-42bd-91bc-581813e13733",
    "userUuid": "f3be3c23-bd0e-475e-b389-62dd1f5aa6c1",
    "applicationUserId": "single-payment-tutorial",
    "institutionId": "modelo-sandbox",
    "status": "AWAITING_AUTHORIZATION",
    "createdAt": "2021-03-03T09:23:45.841Z",
    "featureScope": [
      "EXISTING_PAYMENTS_DETAILS",
      "CREATE_DOMESTIC_SINGLE_PAYMENT",
      "EXISTING_PAYMENT_INITIATION_DETAILS"
    ],
    "state": "6b07bddf9e7746ae8ecb7cbecc00f19a",
    "institutionConsentId": "sdp-1-469c63ef-e6b6-4dd2-88b7-3aea0bff4136",
    "authorisationUrl": "{authorisationUrl}",
    "qrCodeUrl": "https://images.yapily.com/image/55b6b6bc-daa8-490c-89e1-243156868e00/1614763426?size=0"
  }
}
  • The PaymentAuthorisationRequestResponse returned includes the authorisationUrl that you should redirect the user to.
  • The user will be asked to login and authorise the payment with their bank. For this tutorial we use the sandbox credentials : mits / mits .
  • Upon completion the user will be redirected back to the callback url supplied in the request. In our example we are using https://display-parameters.com/ , which will display the parameters returned with the redirect. The most important of which is the consentToken , which is used in the next step to initiate the authorised payment.

3. Create the payment

Once the user authorises the payment request and you have the consentToken, you are able to execute the payment.

To do this, execute Create Payment using the same paymentRequest object specified in step 2 as the request body.

Request:

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curl --location --request POST 'https://api.yapily.com/payments' \
  --header 'Content-Type: application/json' \
  --header 'Consent: {consentToken}' \
  --header 'Authorization: Basic {authToken}' \
  --data-raw '{
    "type": "DOMESTIC_PAYMENT",
    "reference": "Bills Coffee Shop",
    "paymentIdempotencyId": "{uniqueValue}",
    "amount": {
      "amount": 8.70,
      "currency": "GBP"
    },
    "payee": {
      "name": "BILLS COFFEE LTD",
      "accountIdentifications": [
        {
          "type": "ACCOUNT_NUMBER",
          "identification": "{accountNumber}"
        },
        {
          "type": "SORT_CODE",
          "identification": "{sortCode}"
        }
      ],
      "address": {
          "country": "GB"
      }
    }
  }'

Response:

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{
  "meta": {
    "tracingId": "0f07ebe9be5fbec0dd660c4e091bd181"
  },
  "data": {
    "id": "pv3-6c0f031d-6786-4845-9799-bdd2e89ba362",
    "institutionConsentId": "sdp-1-469c63ef-e6b6-4dd2-88b7-3aea0bff4136",
    "paymentIdempotencyId": "{uniqueValue}",
    "paymentLifecycleId": "69d55454ea74546e8b1b44efb17fc45",
    "status": "PENDING",
    "statusDetails": {
      "status": "PENDING",
      "isoStatus": {
        "code": "PDNG",
        "name": "Pending"
      }
      "statusUpdateDate": "2021-03-03T09:41:48.253Z"
    },
    "payeeDetails": {
      "name": "BILLS COFFEE LTD",
      "accountIdentifications": [
        {
          "type": "ACCOUNT_NUMBER",
          "identification": "{accountNumber}"
        },
        {
          "type": "SORT_CODE",
          "identification": "{sortCode}"
        }
      ]
    },
    "reference": "Bills Coffee Shop",
    "amount": 8.70,
    "currency": "GBP",
    "amountDetails": {
      "amount": 8.70,
      "currency": "GBP"
    },
    "createdAt": "2021-03-03T09:41:48.253Z"
  }
}
  • The PaymentResponse returned includes the status and the id . The status of PENDING indicates the request is being processed but is not yet COMPLETED .
  • COMPLETED indicates that the Institution has accepted the payment initiation request and will later proceed with settlement
  • If you receive the PENDING status , you can use the payment-id to poll the payment status until it transitions to COMPLETED or FAILED .

Payment Completed

4. Payment Confirmation

Optional - When the status of the payment is PENDING, you will need to monitor the status until the payment transitions to COMPLETED confirming that the Institution has accepted the payment initiation request.

You can do that by either polling payment details or setting up a webhook notification

To get payment details manually, execute Get Payment Details:

Request:

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curl --location --request GET 'https://api.yapily.com/payments/pv3-6c0f031d-6786-4845-9799-bdd2e89ba362/details' \
  --header 'Content-Type: application/json' \
  --header 'Consent: {consentToken}' \
  --header 'Authorization: Basic {authToken}'
</code></pre>

Response:
<pre><code class="language-json">
{
  "meta": {
    "tracingId": "70c912118c3364f98f1c9dec073c3443"
  },
  "data": {
    "payments": [
      {
        "id": "pv3-6c0f031d-6786-4845-9799-bdd2e89ba362",
        "institutionConsentId": "sdp-1-469c63ef-e6b6-4dd2-88b7-3aea0bff4136",
        "paymentIdempotencyId": "{uniqueValue}",
        "paymentLifecycleId": "69d55454ea74546e8b1b44efb17fc45",
        "status": "COMPLETED",
        "statusDetails": {
          "status": "COMPLETED",
          "isoStatus": {
             "code": "ACTC",
             "name": "AcceptedTechnicalValidation"
          }
          "statusUpdateDate": "2021-03-03T09:41:48.253Z"
        },
        "payeeDetails": {
          "name": "BILLS COFFEE LTD",
          "accountIdentifications": [
            {
              "type": "ACCOUNT_NUMBER",
              "identification": "{accountNumber}"
            },
            {
              "type": "SORT_CODE",
              "identification": "{sortCode}"
            }
          ]
        },
        "reference": "Bills Coffee Shop",
        "amount": 8.70,
        "currency": "GBP",
        "amountDetails": {
          "amount": 8.70,
          "currency": "GBP"
        },
        "createdAt": "2021-03-03T09:41:48.253Z"
      }
    ]
  }
}
  • The PaymentResponse returned is exactly the same as the response from the Create Payment request with the exception that the status may have been updated.

Congratulations! You've just created a single domestic payment via Yapily.

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