gistfile1.txt

import Decimal from 'simple-decimal-money';

export default {
    async fetch(request) {
      const url = new URL(request.url);
      
      // Check if the request is for addition
      if (url.pathname === '/add') {
        // Get query parameters
        const num1 = url.searchParams.get('num1');
        const num2 = url.searchParams.get('num2');
        
        // Validate parameters
        if (!num1 || !num2) {
          return new Response(JSON.stringify({ 
            error: "Missing parameters. Use /add?num1=x&num2=y" 
          }), {
            status: 400,
            headers: { "content-type": "application/json;charset=UTF-8" }
          });
        }
        
        try {
          // Use the bundled Decimal library for precise addition
          const decimal1 = new Decimal(num1);
          const decimal2 = new Decimal(num2);
          const result = decimal1.add(decimal2);
          
          return new Response(JSON.stringify({ 
            num1: decimal1.toString(),
            num2: decimal2.toString(),
            result: result.toString()
          }), {
            headers: { "content-type": "application/json;charset=UTF-8" }
          });
        } catch (error) {
          return new Response(JSON.stringify({ 
            error: "Invalid numbers provided",
            message: error.message 
          }), {
            status: 400,
            headers: { "content-type": "application/json;charset=UTF-8" }
          });
        }
      }
      
      // Default response
      return new Response(JSON.stringify({ 
        message: "Welcome to Decimal Calculator API",
        usage: "/add?num1=x&num2=y"
      }), {
        headers: { "content-type": "application/json;charset=UTF-8" }
      });
    }
  };