initialize
Initializes the EMV kernel environment for both contact and contactless transactions.
This method performs all necessary initialization steps required before any EMV operations can be executed. It sets up the underlying EMV kernels, configures security parameters, and prepares the system for transaction processing.
Basically, anything related to EMV kernel initialization should be performed in this method.
Initialization sequence typically includes:
Contact (CT) kernel initialization - Prepares the chip card processing environment
Contactless (CL) kernel initialization - Prepares the NFC/RFID processing environment
Kernel-specific settings - Applies vendor-specific configurations and parameters
Post-conditions:
Any EMV Kernel API is ready for use
Usage: This method must be called once during application startup or before the first EMV transaction.
Thread safety: Implementation should ensure thread-safe initialization. Concurrent calls should be handled gracefully without causing system instability.
Exceptions: This function MUST NOT throw any exception. Any error must be indicated through NexusRet Any unexpected error must be mapped as NexusRet.INTERR
Implementation notes:
Implementations should log detailed information about each initialization step
Failed initialization should provide clear error messages for troubleshooting
Consider implementing retry mechanisms for transient failures
Ensure proper cleanup if partial initialization fails
Does not throw any exception
Return
NexusRet indicating the initialization result:
NexusRet.OK: All kernels initialized successfully and system is ready
NexusRet.INTERR: Internal error during initialization (hardware, configuration, or system failure)
Other values: Specific initialization errors as defined by the implementation
Example usage:
val result = emvPort.initializeKernelEnvironment()
if (result == NexusRet.OK) {
// System ready for EMV transactions
println("EMV kernel environment initialized successfully")
} else {
// Handle initialization failure
println("Failed to initialize EMV environment: $result")
}