Converts { type: "Buffer", data: [1,2,3,4,...] } to a proper 'raw' file. 😲 WOW 😲 Such 🙏 USEFUL 🙏

buffer_array_to_binary.js

const fs = require("fs");

function createParser() {
    const ArgumentParser = require("argparse").ArgumentParser;
    const parser = new ArgumentParser({ });

    parser.addArgument(
        ['filepath'],
        {
            type: String,
            help: "Filepath to the data packet"
        }
    );

    parser.addArgument(
        ['-o', '--output']
    )

    return parser;
}

function main() {
    const parser = createParser();
    const args = parser.parseArgs();
    const filepath = args["filepath"];
    const output_path = args["output"]
    
    const payload_data = getDataFromFile(filepath);
    const buf = Buffer.from(payload_data);

    console.log(buf.toString());
    
    if(output_path !== null) {
        fs.writeFileSync(output_path, buf);
    }
}

function getDataFromFile(filepath) {
    const file_content = fs.readFileSync(filepath);
    const json_content = JSON.parse(file_content);
    const payload = json_content["payload"];
    const payload_data = payload["data"];
    return payload_data
}

main();