a901980a6f
- Add MongoDB connection module for database access - Implement Mailgun email service for sending notifications - Add shareChecksum utility for generating secure share links - Implement three email sender functions: - Email verification requests (highest priority) - Rent due notifications (CET timezone) - Utility bills due notifications - Create main email worker with budget-based email sending - Add environment variables for configuration - Install dependencies: mongodb, mailgun.js, form-data - Update package.json description to reflect email worker purpose - Add .env.example with all required configuration The worker processes emails in priority order and respects a configurable budget to prevent overwhelming the mail server. All database operations are atomic and updates are performed immediately after each email send. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
37 lines
1.0 KiB
TypeScript
37 lines
1.0 KiB
TypeScript
import crypto from 'crypto';
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/**
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* Checksum length in hex characters (16 chars = 64 bits of entropy)
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*/
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export const CHECKSUM_LENGTH = 16;
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/**
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* Generate share link checksum for location
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* Uses HMAC-SHA256 for cryptographic integrity
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*
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* SECURITY: Prevents location ID enumeration while allowing stateless validation
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*/
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export function generateShareChecksum(locationId: string): string {
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const secret = process.env.SHARE_LINK_SECRET;
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if (!secret) {
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throw new Error('SHARE_LINK_SECRET environment variable not configured');
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}
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return crypto
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.createHmac('sha256', secret)
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.update(locationId)
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.digest('hex')
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.substring(0, CHECKSUM_LENGTH);
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}
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/**
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* Generate combined location ID with checksum appended
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* @param locationId - The MongoDB location ID (24 chars)
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* @returns Combined ID: locationId + checksum (40 chars total)
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*/
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export function generateShareId(locationId: string): string {
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const checksum = generateShareChecksum(locationId);
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return locationId + checksum;
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}
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