const compress = require('zstd-lib').compress;

compress(input, function(err, output)) {
  // ...
};

const decompress = require('zstd-lib').decompress;

decompress(input, function(err, output) {
  // ...
});

const compressSync = require('zstd-lib').compressSync;

try {
  var output = compressSync(input);
} catch(err) {
  // ...
}

const decompressSync = require('zstd-lib').decompressSync;

try {
  var output = decompressSync(input);
} catch(err) {
  // ...
}

const compressStream = require('zstd-lib').compressStream;
const fs = require('fs');

fs.createReadStream('path/to/input')
  .pipe(compressStream())
  .pipe(fs.createWriteStream('path/to/output'));

const decompressStream = require('zstd-lib').decompressStream;
const fs = require('fs');

fs.createReadStream('path/to/input')
  .pipe(decompressStream())
  .pipe(fs.createWriteStream('path/to/output'));

const zstdCompressParams = {
  level: 5, // default 1
  dict: new Buffer('hello zstd'), // if dict null, left level only.
  dictSize: dict.length  // if dict null, left level only.
};

const zdtdDecompressParams = {
  dict: new Buffer('hello zstd'),
  dictSize: dict.length
};