GenAIScript

// Function to generate a credit card number function generateCreditCardNumber(): string { // Define the prefix for Visa cards const prefix = "400000" // Define the total length of the credit card number const length = 16 // Initialize the card number with the prefix let cardNumber = prefix // Loop until the card number reaches the desired length minus the check digit while (cardNumber.length < length - 1) { // Append a random digit to the card number cardNumber += Math.floor(Math.random() * 10).toString() } // Append the check digit to the card number cardNumber += getCheckDigit(cardNumber) // Return the complete card number return cardNumber } // Function to calculate the check digit using the Luhn algorithm function getCheckDigit(cardNumber: string): string { // Initialize the sum to 0 let sum = 0 // Flag to determine whether to double the digit or not let shouldDouble = true // Loop through the card number digits from right to left for (let i = cardNumber.length - 1; i >= 0; i--) { // Parse the current digit let digit = parseInt(cardNumber.charAt(i)) // If the flag is set, double the digit if (shouldDouble) { digit *= 2 // If the doubled digit is greater than 9, subtract 9 if (digit > 9) { digit -= 9 } } // Add the digit to the sum sum += digit // Toggle the flag for the next digit shouldDouble = !shouldDouble } // Calculate the check digit const checkDigit = newFunction(sum) // Return the check digit as a string return checkDigit.toString() } function newFunction(sum: number) { // TODO return 0 // return (10 - (sum % 10)) % 10; }