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Shared utilities for credit card generation\n\nexport interface CardData {\n number: string;\n cvv: string;\n expiryMonth: string;\n expiryYear: string;\n holderName: string;\n type: CardType;\n}\n\nexport type CardType = 'visa' | 'mastercard' | 'amex' | 'discover';\n\nexport interface CardTypeInfo {\n name: string;\n prefix: string[];\n length: number;\n cvvLength: number;\n color: string;\n gradient: string;\n}\n\nexport const cardTypes: Record = {\n visa: {\n name: 'Visa',\n prefix: ['4'],\n length: 16,\n cvvLength: 3,\n color: '#1e3a8a',\n gradient: 'from-blue-900 to-blue-700'\n },\n mastercard: {\n name: 'Mastercard',\n prefix: ['5'],\n length: 16,\n cvvLength: 3,\n color: '#dc2626',\n gradient: 'from-red-900 to-red-700'\n },\n amex: {\n name: 'American Express',\n prefix: ['34', '37'],\n length: 15,\n cvvLength: 4,\n color: '#059669',\n gradient: 'from-green-900 to-green-700'\n },\n discover: {\n name: 'Discover',\n prefix: ['6'],\n length: 16,\n cvvLength: 3,\n color: '#7c2d12',\n gradient: 'from-orange-900 to-orange-700'\n }\n};\n\n// Luhn Algorithm Implementation\nexport function luhnChecksum(cardNumber: string): number {\n let sum = 0;\n let alternate = false;\n \n // Process digits from right to left\n for (let i = cardNumber.length - 1; i >= 0; i--) {\n let digit = parseInt(cardNumber.charAt(i));\n \n if (alternate) {\n digit *= 2;\n if (digit > 9) {\n digit = (digit % 10) + 1;\n }\n }\n \n sum += digit;\n alternate = !alternate;\n }\n \n return sum % 10;\n}\n\nexport function generateValidCardNumber(type: CardType, customBin?: string): string {\n const cardInfo = cardTypes[type];\n \n let prefix: string;\n if (customBin && customBin.trim()) {\n // Use custom BIN if provided\n prefix = customBin.trim();\n } else {\n // Use default prefix for card type\n prefix = cardInfo.prefix[Math.floor(Math.random() * cardInfo.prefix.length)];\n }\n \n // Generate random digits for the middle part\n let cardNumber = prefix;\n const remainingLength = cardInfo.length - prefix.length - 1; // -1 for check digit\n \n // Ensure we don't exceed card length\n if (remainingLength < 0) {\n throw new Error(`Custom BIN is too long for ${cardInfo.name} (max ${cardInfo.length - 1} digits)`);\n }\n \n for (let i = 0; i < remainingLength; i++) {\n cardNumber += Math.floor(Math.random() * 10).toString();\n }\n \n // Calculate and append check digit using Luhn algorithm\n const checksum = luhnChecksum(cardNumber + '0');\n const checkDigit = checksum === 0 ? 0 : 10 - checksum;\n cardNumber += checkDigit.toString();\n \n return cardNumber;\n}\n\nexport function generateCVV(length: number): string {\n let cvv = '';\n for (let i = 0; i < length; i++) {\n cvv += Math.floor(Math.random() * 10).toString();\n }\n return cvv;\n}\n\nexport function generateExpiryDate(): { month: string; year: string } {\n const currentYear = new Date().getFullYear();\n const month = Math.floor(Math.random() * 12) + 1;\n const year = currentYear + Math.floor(Math.random() * 8) + 1; // 1-8 years from now\n \n return {\n month: month.toString().padStart(2, '0'),\n year: year.toString()\n };\n}\n\nexport function generateHolderName(): string {\n const firstNames = [\n 'ALEX', 'JORDAN', 'TAYLOR', 'CASEY', 'MORGAN', 'RILEY', 'AVERY', 'QUINN',\n 'SAGE', 'ROWAN', 'BLAKE', 'DREW', 'JAMIE', 'REESE', 'SKYLAR', 'DAKOTA'\n ];\n \n const lastNames = [\n 'SMITH', 'JOHNSON', 'WILLIAMS', 'BROWN', 'JONES', 'GARCIA', 'MILLER',\n 'DAVIS', 'RODRIGUEZ', 'MARTINEZ', 'HERNANDEZ', 'LOPEZ', 'GONZALEZ',\n 'WILSON', 'ANDERSON', 'THOMAS', 'TAYLOR', 'MOORE', 'JACKSON', 'MARTIN'\n ];\n \n const firstName = firstNames[Math.floor(Math.random() * firstNames.length)];\n const lastName = lastNames[Math.floor(Math.random() * lastNames.length)];\n \n return `${firstName} ${lastName}`;\n}\n\nexport function generateCardData(type: CardType, customBin?: string): CardData {\n const cardInfo = cardTypes[type];\n const number = generateValidCardNumber(type, customBin);\n const cvv = generateCVV(cardInfo.cvvLength);\n const expiry = generateExpiryDate();\n const holderName = generateHolderName();\n \n return {\n number,\n cvv,\n expiryMonth: expiry.month,\n expiryYear: expiry.year,\n holderName,\n type\n };\n}\n\nexport function formatCardNumber(number: string): string {\n // Format card number with spaces for better readability\n if (number.length === 15) {\n // American Express: XXXX XXXXXX XXXXX\n return number.replace(/(\\d{4})(\\d{6})(\\d{5})/, '$1 $2 $3');\n } else {\n // Others: XXXX XXXX XXXX XXXX\n return number.replace(/(\\d{4})(?=\\d)/g, '$1 ');\n }\n}\n\nexport function validateBin(bin: string, type: CardType): { valid: boolean; message: string } {\n if (!bin || bin.trim() === '') {\n return { valid: true, message: 'Using default BIN' };\n }\n \n const cleanBin = bin.trim();\n \n // Check if BIN contains only digits\n if (!/^\\d+$/.test(cleanBin)) {\n return { valid: false, message: 'BIN must contain only numbers' };\n }\n \n const cardInfo = cardTypes[type];\n \n // Check BIN length (should not exceed card length - 1 for check digit)\n if (cleanBin.length >= cardInfo.length) {\n return { valid: false, message: `BIN too long for ${cardInfo.name} (max ${cardInfo.length - 1} digits)` };\n }\n \n // Check minimum BIN length (at least 4 digits)\n if (cleanBin.length < 4) {\n return { valid: false, message: 'BIN must be at least 4 digits' };\n }\n \n // Check if BIN starts with valid prefix for card type (optional validation)\n const startsWithValidPrefix = cardInfo.prefix.some(prefix => cleanBin.startsWith(prefix));\n if (!startsWithValidPrefix) {\n return { \n valid: true, \n message: `Warning: BIN doesn't match typical ${cardInfo.name} pattern (${cardInfo.prefix.join(', ')})` \n };\n }\n \n return { valid: true, message: 'Valid BIN' };\n}\n\nexport function validateCardNumber(number: string): boolean {\n // Remove spaces and validate using Luhn algorithm\n const cleanNumber = number.replace(/\\s/g, '');\n if (!/^\\d+$/.test(cleanNumber)) return false;\n \n return luhnChecksum(cleanNumber) === 0;\n}\n\n\n\nexport interface BulkCardFormat {\n bin?: string;\n month?: string;\n year?: string;\n cvv?: string;\n}\n\nexport function parseBulkFormat(input: string): BulkCardFormat {\n // Support formats like:\n // 5678990|01|2028|000\n // 424242|xx|xxxx|xxx\n // 10|28|000 (short format)\n // 5678990|||123 (empty fields for random)\n \n const parts = input.split('|');\n const result: BulkCardFormat = {};\n \n if (parts.length >= 1 && parts[0].trim()) {\n result.bin = parts[0].trim();\n }\n \n if (parts.length >= 2 && parts[1].trim() && !isPlaceholder(parts[1])) {\n result.month = parts[1].trim().padStart(2, '0');\n }\n \n if (parts.length >= 3 && parts[2].trim() && !isPlaceholder(parts[2])) {\n result.year = parts[2].trim();\n }\n \n if (parts.length >= 4 && parts[3].trim() && !isPlaceholder(parts[3])) {\n result.cvv = parts[3].trim();\n }\n \n return result;\n}\n\nfunction isPlaceholder(value: string): boolean {\n const trimmed = value.trim().toLowerCase();\n return trimmed === 'xxx' || trimmed === 'xx' || trimmed === 'xxxx' || trimmed === '';\n}\n\nexport function generateCardDataFromFormat(type: CardType, format: BulkCardFormat): CardData {\n const cardInfo = cardTypes[type];\n \n // Generate card number with custom BIN if provided\n const number = generateValidCardNumber(type, format.bin);\n \n // Generate or use custom CVV\n let cvv: string;\n if (format.cvv) {\n // Validate CVV length\n if (format.cvv.length !== cardInfo.cvvLength) {\n throw new Error(`CVV must be ${cardInfo.cvvLength} digits for ${cardInfo.name}`);\n }\n cvv = format.cvv;\n } else {\n cvv = generateCVV(cardInfo.cvvLength);\n }\n \n // Generate or use custom expiry date\n let expiryMonth: string;\n let expiryYear: string;\n \n if (format.month || format.year) {\n // Use provided values or generate missing ones\n if (format.month) {\n const monthNum = parseInt(format.month);\n if (monthNum < 1 || monthNum > 12) {\n throw new Error('Month must be between 01 and 12');\n }\n expiryMonth = format.month.padStart(2, '0');\n } else {\n expiryMonth = (Math.floor(Math.random() * 12) + 1).toString().padStart(2, '0');\n }\n \n if (format.year) {\n // Handle 2-digit or 4-digit years\n let yearNum = parseInt(format.year);\n if (format.year.length === 2) {\n yearNum = 2000 + yearNum;\n }\n \n const currentYear = new Date().getFullYear();\n if (yearNum < currentYear) {\n throw new Error('Expiry year cannot be in the past');\n }\n \n expiryYear = yearNum.toString();\n } else {\n const currentYear = new Date().getFullYear();\n expiryYear = (currentYear + Math.floor(Math.random() * 8) + 1).toString();\n }\n } else {\n const expiry = generateExpiryDate();\n expiryMonth = expiry.month;\n expiryYear = expiry.year;\n }\n \n const holderName = generateHolderName();\n \n return {\n number,\n cvv,\n expiryMonth,\n expiryYear,\n holderName,\n type\n };\n}\n\nexport function validateBulkFormat(input: string): { valid: boolean; message: string; format?: BulkCardFormat } {\n if (!input || !input.trim()) {\n return { valid: false, message: 'Format string is required' };\n }\n \n try {\n const format = parseBulkFormat(input);\n \n // Validate BIN if provided\n if (format.bin) {\n if (!/^\\d+$/.test(format.bin)) {\n return { valid: false, message: 'BIN must contain only numbers' };\n }\n if (format.bin.length < 4 || format.bin.length > 15) {\n return { valid: false, message: 'BIN must be 4-15 digits' };\n }\n }\n \n // Validate month if provided\n if (format.month) {\n const monthNum = parseInt(format.month);\n if (monthNum < 1 || monthNum > 12) {\n return { valid: false, message: 'Month must be between 01 and 12' };\n }\n }\n \n // Validate year if provided\n if (format.year) {\n let yearNum = parseInt(format.year);\n if (format.year.length === 2) {\n yearNum = 2000 + yearNum;\n }\n \n const currentYear = new Date().getFullYear();\n if (yearNum < currentYear || yearNum > currentYear + 20) {\n return { valid: false, message: 'Year must be between current year and 20 years from now' };\n }\n }\n \n // Validate CVV if provided\n if (format.cvv) {\n if (!/^\\d+$/.test(format.cvv)) {\n return { valid: false, message: 'CVV must contain only numbers' };\n }\n if (format.cvv.length < 3 || format.cvv.length > 4) {\n return { valid: false, message: 'CVV must be 3 or 4 digits' };\n }\n }\n \n return { \n valid: true, \n message: 'Valid format', \n format \n };\n } catch (error) {\n return { valid: false, message: error.message };\n }\n}\n\nexport function getFormatExamples(): string[] {\n return [\n '424242|12|2028|123',\n '5555555|xx|xxxx|xxx',\n '378282|01|25|1234',\n '601111||2027|',\n '4000000|10|28|000',\n '5678990|||456'\n ];\n}\n\nexport function getFormatDescription(): string {\n return `Format: BIN|MONTH|YEAR|CVV\n• Use 'xxx' or 'xx' for random values\n• Leave empty for random (e.g., 424242|||)\n• 2-digit years become 20XX (e.g., 28 = 2028)\n• Examples: 424242|12|2028|123 or 5555|xx|xxxx|xxx`;\n}\n\nexport interface BulkGenerationOptions {\n quantity: number;\n type: CardType;\n customBin?: string;\n bulkFormat?: string;\n}\n\nexport interface BulkGenerationResult {\n cards: CardData[];\n totalGenerated: number;\n generationTime: number;\n mode: 'simple' | 'custom' | 'bulk';\n}\n\nexport function generateMultipleCards(options: BulkGenerationOptions): BulkGenerationResult {\n const startTime = Date.now();\n const cards: CardData[] = [];\n \n for (let i = 0; i < options.quantity; i++) {\n try {\n let cardData: CardData;\n \n if (options.bulkFormat) {\n // Use bulk format for each card\n const validation = validateBulkFormat(options.bulkFormat);\n if (validation.valid && validation.format) {\n cardData = generateCardDataFromFormat(options.type, validation.format);\n } else {\n throw new Error('Invalid bulk format');\n }\n } else {\n // Use simple or custom BIN generation\n cardData = generateCardData(options.type, options.customBin);\n }\n \n cards.push(cardData);\n } catch (error) {\n // Skip invalid cards and continue\n console.warn(`Failed to generate card ${i + 1}:`, error.message);\n }\n }\n \n const endTime = Date.now();\n const generationTime = endTime - startTime;\n \n return {\n cards,\n totalGenerated: cards.length,\n generationTime,\n mode: options.bulkFormat ? 'bulk' : options.customBin ? 'custom' : 'simple'\n };\n}\n\nexport function validateQuantity(quantity: number, mode: 'default' | 'custom'): { valid: boolean; message: string } {\n if (!Number.isInteger(quantity) || quantity < 1) {\n return { valid: false, message: 'Quantity must be a positive integer' };\n }\n \n if (mode === 'default') {\n if (quantity > 100) {\n return { valid: false, message: 'Default mode limited to 100 cards maximum' };\n }\n } else {\n if (quantity < 1 || quantity > 10000) {\n return { valid: false, message: 'Custom mode allows 1-10,000 cards' };\n }\n \n if (quantity > 1000) {\n return { \n valid: true, \n message: `Warning: Generating ${quantity} cards may take some time` \n };\n }\n }\n \n return { valid: true, message: 'Valid quantity' };\n}\n\nexport function exportCardsAsCSV(cards: CardData[]): string {\n const headers = ['Card Number', 'CVV', 'Expiry Month', 'Expiry Year', 'Cardholder Name', 'Card Type'];\n const csvRows = [headers.join(',')];\n \n cards.forEach(card => {\n const row = [\n `\"${card.number}\"`,\n `\"${card.cvv}\"`,\n `\"${card.expiryMonth}\"`,\n `\"${card.expiryYear}\"`,\n `\"${card.holderName}\"`,\n `\"${card.type}\"`\n ];\n csvRows.push(row.join(','));\n });\n \n return csvRows.join('\\n');\n}\n\nexport function exportCardsAsJSON(cards: CardData[]): string {\n return JSON.stringify(cards, null, 2);\n}\n\nexport function exportCardsAsText(cards: CardData[]): string {\n return cards.map((card, index) => {\n return `Card ${index + 1}:\nNumber: ${formatCardNumber(card.number)}\nCVV: ${card.cvv}\nExpiry: ${card.expiryMonth}/${card.expiryYear}\nName: ${card.holderName}\nType: ${card.type.toUpperCase()}\n---`;\n }).join('\\n');\n}\n\nexport function exportCardsAsList(cards: CardData[]): string {\n return cards.map(card => {\n // Convert 4-digit year to 2-digit year\n const shortYear = card.expiryYear.slice(-2);\n return `${card.number}|${card.expiryMonth}|${shortYear}|${card.cvv}`;\n }).join('\\n');\n}\n\nexport function detectCardType(bin: string): CardType | null {\n const cleanBin = bin.replace(/\\s/g, '');\n \n for (const [type, info] of Object.entries(cardTypes)) {\n if (info.prefix.some(prefix => cleanBin.startsWith(prefix))) {\n return type as CardType;\n }\n }\n \n return null;\n}","deleted","label",[170,151],"shared","permalink","https://www.val.town/x/Itssongoku/SON-GOKU/code/shared/utils.ts","extension","actionData","errors"]