tail a hypercore given its public key

example.bash

hyperspace-simulator tail_hypercore.js -- 0ce9e824c768daf0564f6f1ec24e04430111b8845476464ffbf60e8e3ef06347

tail_hypercore.js

const stats = require('process-top')() // instantiate a stats collector
const { Client } = require('hyperspace')

const publicKey = process.argv[2]

main()

async function main() {
  if (!publicKey) throw new Error(`publicKey?`)
  console.log(`tailing hypercore "${publicKey}"`)

  const client = new Client()
  await client.ready()
  const store = client.corestore()
  const core = store.get({
    key: publicKey,
    valueEncoding: 'json',
  })
  console.log(core)

  console.log('waiting for core to be ready…')
  await core.ready()

  console.log('replicating core…')
  await client.replicate(core)

  async function logLatestBlock(){
    try{
      if (core.length <= 0) {
        console.warn('core.length === 0')
      }else{
        const block = await core.get(core.length - 1)
        console.log(block)
      }
    }catch(error){
      console.error(`error getting latest block ${block.length -1}: ` + error)
    }
  }

  logLatestBlock()
  core.on('append', logLatestBlock)
}