Welcome to the Developer Portal

Default UI Integration
- Integrating Default UI
- Migrating from PayButton to Default UI
- Managing Default UI Properties
- Summary Screen
- Incremental Authorization
- Custom Receipt Printing
- Automatic Receipt Printing
- Standalone Receipt Printing
- Sending Receipts via Email
- Customization
- Mobile UI Customization
- Release Notes

PayButton Integration
- Integration
- Summary Screen
- On-Reader Tipping
- Loyalty and Bonus Cards
- Pre-Auth and Capture
- Refunds
- Custom Receipts
- Testing
- Going Live
- Release Notes

Windows Integration
- Configure, Run, and Test PayServer
- .NET POS Integration via PayClient
  - Refunds
  - Custom Receipts
  - Preformatted Receipts
  - On-Reader Tipping
  - Pre-Auth and Capture
- POS Integration via PayProtocol
  - Usage and Message Flows
  - Message Specification
  - Refunds
  - Custom Receipts
  - Preformatted Receipts
- Testing
- Going Live
- Release Notes

Custom Integration
- Installation
- Integration
- Signature
- Refunds
- Email & Print Receipts
- Custom Receipts
- Custom Receipts for PAX Terminals
- Preformatted Receipts
- On-Reader Tipping
- Loyalty & Bonus Cards
- Pre-Auth & Capture
- Connection Keep-Alive
- Testing
- Going Live

Backend Integration
- API Endpoints and Authentication
- WebHooks
- Query Transactions
- Refunds
- Custom Receipts
- Going Live
- API Documentation

Merchant Setup
- AMEX Merchant Setup
- Elavon Merchant Setup
- Nexi Merchant Setup

Managing PayButton Properties

PayButton 2.0 provides methods to get (query) and set properties, including the current merchant identifier, SDK version, and other property settings. Properties that you can access are shown in the table below.

Property	Access	Description
isReadyForTransaction	get	Returns true if PayButton is ready to start a new transaction, returns false if another transaction is ongoing.
locale	get, set	Enables user to change the language used in PayButton. If the locale is not set, the default system language is used.
merchantIdentifier	get	Returns the currently configured merchant identifier. Merchant credentials can only be set during PayButton initialization.
uiConfiguration	get, set	Used to change the default PayButton UI configurations and to enable or disable features.
version	get	Returns the version number of the PayButton SDK currently in use.

PayButton 2.0 Integration