download verified contracts to the local files

getVerifiedContract.js

// run via `node scripts/utils/getVerifiedContract.js`
const axios = require('axios');
const fs = require('fs');
const path = require('path');

const contractAddress = '0x46a15b0b27311cedf172ab29e4f4766fbe7f4364';
const apiKey = process.env.BSCSCAN_TOKEN;
const baseUrl = 'https://api.bscscan.com/api';

async function getVerifiedContractCode(address) {
  try {
    const url = `${baseUrl}?module=contract&action=getsourcecode&address=${address}&apikey=${apiKey}`;
    const response = await axios.get(url);

    if (response.data.status === '1') {
      const contractData = response.data.result[0];
      const solidityCode = contractData.SourceCode;
      const solidityCodeFixed = solidityCode.replace('{{', '{').replace('}}', '}');

      const solidityCodeJson = JSON.parse(solidityCodeFixed);

      const downloadsFolder = './downloads';
      if (!fs.existsSync(downloadsFolder)) {
        fs.mkdir(downloadsFolder, (err) => {
          if (err) throw err;
          console.log(`Folder '${downloadsFolder}' created successfully.`);
        });
      } else {
        console.log(`Folder '${downloadsFolder}' already exists.`);
      }

      for (const key in solidityCodeJson.sources) {
        const baseName = path.basename(key);
        const toSave = path.join(downloadsFolder, baseName);
        const jsonString = JSON.stringify(solidityCodeJson.sources[key], null, 2);
        fs.writeFile(toSave, jsonString, (err) => {
          if (err) {
            console.error('Error saving file:', err);
          } else {
            console.log(`${key} saved to ${toSave}`);
          }
        });
      }
    } else {
      console.error('Cannot get contract source code');
    }
  } catch (error) {
    console.error('Error:', error);
  }
}

getVerifiedContractCode(contractAddress);