const node = await IPFS.create()
const data = 'Hello, <YOUR NAME HERE>'
// add your data to IPFS - this can be a string, a Buffer,
// a stream of Buffers, etc
const results = node.add(data)
// we loop over the results because 'add' supports multiple 
// additions, but we only added one entry here so we only see
// one log line in the output
for await (const { cid } of results) {
  // CID (Content IDentifier) uniquely addresses the data
  // and can be used to get it again.
  console.log(cid.toString())
}

const node = await IPFS.create()
const stream = node.cat('<YOUR CID HERE>')
const decoder = new TextDecoder()
let data = ''
for await (const chunk of stream) {
  // chunks of data are returned as a Uint8Array, convert it back to a string
  data += decoder.decode(chunk, { stream: true })
}
console.log(data)