MajorKeyDerivationMode module-attribute ¶ MajorKeyDerivationMode: TypeAlias = Literal['EMV_OPTION_A', 'EMV_OPTION_B'] Used by AsyncPaymentCryptographyDataClient Operations generate_auth_request_cryptogram verify_auth_request_cryptogram PaymentCryptographyDataClient Operations generate_auth_request_cryptogram verify_auth_request_cryptogram