API Overview

Unified Checkout Developer Guide
- Recent Revisions to This Document

Introduction to Unified Checkout

Unified Checkout Quick Start
- Step 1: Enable Unified Checkout
- Step 2: Set Up the Server-Side Component
- Step 3: Set Up the Client-Side Component
- Step 4: Configure Unified Checkout
- Step 5: Test Your Unified Checkout Integration

Unified Checkout Flow

Server-Side Set Up

Client-Side Set Up
- Loading the JavaScript Library
- Complete Integration Examples

Configuration
- Configure the Unified Checkout Merchant Experience
  - Enable Unified Checkout
  - Configure Payment Options
  - Customize the Unified Checkout Look and Feel
  - Look and Feel UI Examples
  - Configure Customer Data and Payment Flow
  - Capture Context Fields in the Smartpay Fuse Portal
  - Manage Permissions
    - Managing Permissions as an Administrator
- Process Payments with Unified Checkout
- Webhooks Support

Transient Tokens
- Transient Token Format
- Token Verification
- Dual-Branded Cards
- Authorizations with a Transient Token

Test Your Configuration
- Unified Checkout Test Cards
- Visa and Mastercard Click to Pay Test Cards
- Test Cards for Authentication by Click to Pay
- Test Authentication
- Handle Errors
- Reason Codes

Payment Details API

JavaScript API Reference

Appendix
- JSON Web Tokens
- Supported Countries for Digital Payments
- Supported Locales
- Update to Unified Checkout Version 1
  - Update Reason Codes
  - Version 1 Update Checklist
- Security Recommendations
- PCI Compliance

On This Page

Complete Mandate

The complete mandate feature provides service orchestration within Unified Checkout and simplifies your integration. Service orchestration enables Unified Checkout to orchestrate services on your behalf. The complete mandate feature provides instructions to the

unifiedPayment.complete()

method in the JavaScript. You must include both the

unifiedPayment.complete()

object in the Javascript and the

completeMandate

field object in your capture context to enable Unified Checkout to initiate services on your behalf from the browser.

IMPORTANT

If you are updating an existing Unified Checkout configuration to use the complete mandate, you must update your JavaScript to include the

unifedPayment.complete()

function.

IMPORTANT

When the

billingType

field is set to

NONE

you must include the required fields within the capture context request to ensure that the required fields are included for payment processing. For information about the fields that are required for payment services, see the Payments Developer Guide.

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