Integrated Pre-Authorisation — Headless Implementation

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Overview

The Headless adapter enables pre-authorisation without displaying an in-progress transaction UI on the terminal.

ITerminalAdapterHeadless

Event-Based Method

bool OpenPreAuth(
  long preAuthLimit,
  string? merchantID = null,
  string? terminalID = null,
  string? transactionId = null
)

Task-Based Method

Task<ITransactionResult?> OpenPreAuthAsync(
  long preAuthLimit,
  string? merchantID = null,
  string? terminalID = null,
  string? transactionId = null,
  Action<IReceipt>? receiptReturned = null,
  Action<string>? messageReceived = null,
  Action<IQuestion>? questionAsked = null
)

Callbacks

• receiptReturned: Receives transaction receipts
• messageReceived: Displays terminal messages
• questionAsked: Handles terminal prompts/questions