text: /*
   * Copyright 2018-2020 TON DEV SOLUTIONS LTD.
   *
   * Licensed under the SOFTWARE EVALUATION License (the "License"); you may not use
   * this file except in compliance with the License.  You may obtain a copy of the
   * License at:
   *
   * http://www.ton.dev/licenses
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific TON DEV software governing permissions and
   * limitations under the License.
   */
  
  const fs = require('fs');
  const http = require('https');
  const zlib = require('zlib');
  const path = require('path');
  const os = require('os');
  const platform = os.platform();
  const arch = os.arch();
  
  const binariesSource =
    process.env.TON_CLIENT_BIN_SRC || 'https://binaries.tonlabs.io';
  const binariesVersion =
    process.env.TON_CLIENT_BIN_VERSION ||
    require('./package.json').version.split('.').slice(0, 2).join('_');
  const binariesHomePath = path.resolve(os.homedir(), '.tonlabs', 'binaries', binariesVersion);
  
  function downloadAndGunzip(dest, url) {
      return new Promise((resolve, reject) => {
          const request = http.get(url, response => {
              if (response.statusCode !== 200) {
                  reject({
                      message: `Download from ${url} failed with ${response.statusCode}: ${response.statusMessage}`,
                  });
                  return;
              }
              let file = fs.createWriteStream(dest, { flags: 'w' });
              let opened = false;
              const failed = (err) => {
                  if (file) {
                      file.close();
                      file = null;
  
                      fs.unlink(dest, () => {
                      });
                      reject(err);
                  }
              };
  
              const unzip = zlib.createGunzip();
              unzip.pipe(file);
  
  
              response.pipe(unzip);
  
  
              request.on('error', err => {
                  failed(err);
              });
  
              file.on('finish', () => {
                  if (opened && file) {
                      resolve();
                  }
              });
  
              file.on('open', () => {
                  opened = true;
              });
  
              file.on('error', err => {
                  if (err.code === 'EEXIST') {
                      file.close();
                      reject('File already exists');
                  } else {
                      failed(err);
                  }
              });
          });
      });
  
  }
  
  function resolveBinariesTargetPath() {
      try {
          const currentDir = process.cwd();
          const testFile = path.join(currentDir, '__test_writable__.txt');
          fs.writeFileSync(testFile, 'test writable', { encoding: 'utf8' });
          fs.unlinkSync(testFile);
          return currentDir;
      } catch {
          if (!fs.existsSync(binariesHomePath)) {
              fs.mkdirSync(binariesHomePath, { recursive: true });
          }
          return binariesHomePath;
      }
  }
  
  async function dl(dstPath, src) {
      const srcUrl = `${binariesSource}/${src}.gz`;
      process.stdout.write(`Downloading from ${srcUrl} to ${dstPath} ...`);
      await downloadAndGunzip(dstPath, srcUrl);
      process.stdout.write('\n');
  }
  
  async function main() {
      const binariesTargetPath = resolveBinariesTargetPath();
      await dl(path.join(binariesTargetPath, `tonclient.node`), `tonclient_${binariesVersion}_nodejs_addon_${arch}-${platform}`);
  }
  
  (async () => {
      try {
          await main();
      } catch (error) {
          console.error(error);
          process.exit(1);
      }
  })();
  
  