import CID from 'multiformats/cid'
import json from 'multiformats/codecs/json'
import { sha256 } from 'multiformats/hashes/sha2'

const bytes = json.encode({ hello: 'world' })

const hash = await sha256.digest(bytes)
const cid = CID.create(1, json.code, hash)
//> CID(bagaaierasords4njcts6vs7qvdjfcvgnume4hqohf65zsfguprqphs3icwea)

import { base64 } from "multiformats/bases/base64"
cid.toString(base64.encoder)
//> 'mAYAEEiCTojlxqRTl6svwqNJRVM2jCcPBxy+7mRTUfGDzy2gViA'

CID.parse('mAYAEEiCTojlxqRTl6svwqNJRVM2jCcPBxy+7mRTUfGDzy2gViA', base64.decoder)
//> CID(bagaaierasords4njcts6vs7qvdjfcvgnume4hqohf65zsfguprqphs3icwea)

cid.toString(base64)
CID.parse(cid.toString(base64), base64)

const v1 = CID.parse('bagaaierasords4njcts6vs7qvdjfcvgnume4hqohf65zsfguprqphs3icwea')
v1.toString()
//> 'bagaaierasords4njcts6vs7qvdjfcvgnume4hqohf65zsfguprqphs3icwea'

const v0 = CID.parse('QmdfTbBqBPQ7VNxZEYEj14VmRuZBkqFbiwReogJgS1zR1n')
v0.toString()
//> 'QmdfTbBqBPQ7VNxZEYEj14VmRuZBkqFbiwReogJgS1zR1n'
v0.toV1().toString()
//> 'bafybeihdwdcefgh4dqkjv67uzcmw7ojee6xedzdetojuzjevtenxquvyku'

import { codec } from 'multiformats/codecs/codec'

const json = codec({
  name: 'json',
  // As per multiformats table
  // https://github.com/multiformats/multicodec/blob/master/table.csv#L113
  code: 0x0200,
  encode: json => new TextEncoder().encode(JSON.stringify(json)),
  decode: bytes => JSON.parse(new TextDecoder().decode(bytes))
})

const hello = json.encoder.encode({ hello: 'world' })
json.decode(b1)
//> { hello: 'world' }

import * as hasher from 'multiformats/hashes/hasher')

const sha256 = hasher.from({
  // As per multiformats table
  // https://github.com/multiformats/multicodec/blob/master/table.csv#L9
  name: 'sha2-256',
  code: 0x12,

  encode: (input) => new Uint8Array(crypto.createHash('sha256').update(input).digest())
})

const hash = await sha256.digest(json.encode({ hello: 'world' }))
CID.create(1, json.code, hash)

//> CID(bagaaierasords4njcts6vs7qvdjfcvgnume4hqohf65zsfguprqphs3icwea)