PayPal Name-Value Pair API - 2009 Guia do Utilizador descarregar pdf (Página 67)

Name-Value Pair API Developer Guide 08 April 2009 67

Express Checkout API Operations

DoExpressCheckoutPayment API

DESC (Optional) Description of items the customer is purchasing.

Character length and limitations: 127 single-byte alphanumeric characters

CUSTOM (Optional) A free-form field for your own use.

Character length and limitations: 256 single-byte alphanumeric characters

INVNUM (Optional) Your own invoice or tracking number.

Character length and limitations: 127 single-byte alphanumeric characters

BUTTONSOURCE (Optional) An identification code for use by third-party applications to identify

transactions.

Character length and limitations: 32 single-byte alphanumeric characters

NOTIFYURL (Optional) Your URL for receiving Instant Payment Notification (IPN) about this

transaction.

NOTE: If you do not specify this value in the request, the notification URL from your

Merchant Profile is used, if one exists.

Character length and limitations: 2,048 single-byte alphanumeric characters

Field Description

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PayPal Name-Value Pair API - 2009 Guia do Utilizador Página 67