Input Validation
Input Validation is a critical process in software development that ensures all data received by an application is accurate, complete, and secure before it is processed. In the context of the TNSPay BYOA SDK, which runs directly on card terminal devices, input validation plays a vital role in maintaining transaction integrity, preventing errors, and ensuring compliance with security standards.
Why Input Validation Matters
Card terminals handle sensitive financial data and interact with external systems such as payment gateways, card networks, and merchant applications. Without proper input validation, the system is vulnerable to:
- Transaction failures due to malformed or missing data
- Security breaches from injection attacks or unauthorised access
- Compliance violations with PCI-DSS and EMV standards
- Poor user experience caused by unexpected behaviour or crashes
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fun parseAmount(input: String): Double? {
return input.toDoubleOrNull()?.takeIf { it > 0 }
}
fun parseStan(input: String): Int? {
return input.toIntOrNull()?.takeIf { it > 0 }
}Was this section helpful?