Data validation

import android.util.Log
import com.pxp.checkout.components.googlepay.*

// Handle validation errors
val googlePayConfig = GooglePayButtonComponentConfig().apply {
    // ... configuration
    
    onError = { error ->
        when (error) {
            is GooglePayConfigurationValidationFailedException -> {
                Log.e("GooglePay", "Configuration validation failed: ${error.message}")
                
                // Handle specific validation errors
                val message = error.message ?: ""
                
                when {
                    message.contains("allowedPaymentMethods") -> {
                        Log.e("GooglePay", "Invalid payment methods configuration")
                        showError("Payment configuration error. Please contact support.")
                    }
                    message.contains("totalPrice") -> {
                        Log.e("GooglePay", "Invalid total price format")
                        showError("Payment amount error. Please refresh and try again.")
                    }
                    message.contains("gatewayMerchantId") || message.contains("merchant ID") -> {
                        Log.e("GooglePay", "Gateway merchant ID missing or invalid")
                        showError("Payment system configuration error. Please contact support.")
                    }
                    else -> {
                        showError("Payment configuration error.")
                    }
                }
                
                // Log for debugging
                Log.e("GooglePay", "Validation error details: ${error.stackTraceToString()}")
            }
            else -> {
                Log.e("GooglePay", "Payment error", error)
            }
        }
    }
}