AUTHORIZED: Approved Transaction
AUTHORISED-EXPIRED: Preauthorized Transaction which has expired.
CAPTURED : Successful Transaction for payments and for capture of pre-auth transactions
COMPLETE: Successful transaction for token creation
CAPTURED PARTIALLY: Successful Capture of Pre-auth where Capture amount < authorization amount
PREPROCESS: The transaction has been initiated, the payer is in payment page’s environment
INAUTHENTICATION: 3D Authentication has been initiated
CANCELLED: Payer cancelled the transaction
INPAYMENT: Transaction is in approval process
ERROR: Transaction has not been completed due to systemic errors
REFUSED: Rejected transaction
PREPROCESS-TIMEDOUT/ INAUTHENTICATION-TIMEDOUT / ERROR-TIMEDOUT/INWALLET-TIMEDOUT/INPAYMENT-TIMEDOUT: Transaction lifetime has ended
REFUNDED: Total amount has been returned to payer
REFUNDED PARTIALLY: Partial amount has been returned to payer
REVERSED: Merchant cancelled the pre-auth transaction
VOID: Payment/Capture of preauth transaction which has been cancelled by the merchant
TIMEDOUT: IRIS transaction lifetime has ended

Below are available all the possible iso response code a transaction may receive will the Authorisation process has been initiated.