Deflate SHC by Gzip

index.js

const zlib = require('zlib');
const Got = require('got').default;
const { promisify } = require('util');
const gzipRaw = promisify(zlib.gzip);

const minifiedUrl = 'https://smarthealth.cards/examples/example-00-c-jws-payload-minified.json'; 

async function deflateByGzip(string) {
    const gzipped = await gzipRaw(string);
    return gzipped.slice(10, gzipped.length - 8);
}

(async () => {
    const minifiedPayload = (await Got.get(minifiedUrl)).body;
    const deflated = await deflateByGzip(minifiedPayload);
    const inflated = zlib.inflateRawSync(deflated);
    console.log(inflated.toString());
})();

package.json

{
  "name": "@madaster97/gzip-deflate-test",
  "version": "1.0.0",
  "description": "A simple gist to show gzip's use for deflation",
  "main": "index.js",
  "dependencies": {
    "got": "^11.8.1"
  },
  "devDependencies": {},
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "Adam Strickland",
  "license": "ISC"
}