Terminal States

IDLE

Initial state; no transaction in progress

0

CARD_READ

Card is being read

1

PREPARE_ONLINE_DATA

Preparing data for online transaction

2

PIN_INPUT

Awaiting PIN input

3

ONLINE_PROCESSING

Processing transaction online

4

ONLINE_TRANSFER

Transferring data online

5

ONLINE_RECEIVE

Receiving response from host

6

ONLINE_TIMEOUT

Online transaction timed out

7

ENTER_AMOUNT

User is entering transaction amount

8

CHECK_CARD

Checking card validity

9

SCAN_CODE

Scanning QR or barcode

10

OFFLINE_SEND

Sending offline transaction data

11

SIGNATURE

Capturing customer signature

12

CHECK_OFFLINE

Checking offline transaction

13

CLSS_PROCESS

Processing contactless transaction

14

EMV_PROCESS

Processing EMV transaction

15

FALLBACK_REMOVE_CARD

Prompting user to remove card for fallback

16

FALLBACK_SWIPE_CARD

Prompting user to swipe card for fallback

17

WAIT_REMOVE_CARD

Waiting for card removal

18

EMV_WAIT_APP_SELECT

Waiting for EMV application selection

19

EMV_INPUT_PWD

EMV password input

20

EMV_CARD_CONFIRM

Confirming EMV card details

21

CLSS_DECTECT_2ND_TAP

Detecting second tap for contactless transaction

22

CLSS_SEE_PHONE

Prompting user to see phone for contactless

23

CLSS_READ_CARD_OK

Contactless card read successfully

24

TRANS_CANCEL

Transaction cancelled

-1

ERROR_RECEIVED

Error received during transaction

-2

TRANS_ABORT

Transaction aborted

-3

TRANS_NOT_FOUND

Transaction not found

-4