Start Transaction — Android
| Parameter | Type | Required |
|---|---|---|
| amount | BigDecimal | Yes |
| currency | String | Yes |
| type | TransactionType | Yes (SALE, AUTH, REFUND) |
| orderID | String | Recommended |
| description | String | No |
| tip | BigDecimal | No |
See the Tap to Pay on Android overview for the full topic list.