Extended Command 0X0304 - Cancel Transaction (Emv Only) - Magtek mDynamo Programmer's Manual

7 - Commands

7.4.6 Extended Command 0x0304 - Cancel Transaction (EMV Only)

Like all extended commands, the host initiates this command by calling Command 0x49 - Send
Extended Command Packet (Extended Commands Only), and receives a response as documented
there.
The host uses this command to cancel a transaction while the device is waiting for the cardholder to
present payment.
Request Data: None
Response Data: None
Result codes:
0x0000 = Success, the transaction was cancelled
0x038D = Failure, no transaction currently in progress
0x038F = Failure, transaction in progress, cardholder already presented payment
Example Request (Hex)
Command Number
Data Length
Extended Data Offset
Extended Command Number
Complete Extended Data Length
Extended Data
Example Response (Hex)
Result Code
Data Length
Extended Data Offset
Extended Result Code
Complete Extended Data Length
Extended Data
mDynamo| OEM Secure Card Reader Authenticator | Programmer's Manual (COMMANDS)
Header
49
06
Data
0000
0304
0000
Not Applicable
Header
0A
06
Data
0000
0000
0000
Not Applicable
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