ipfs-api/src/utils/clean-multihash.js

A client library for the IPFS HTTP API

'use strict'

const bs58 = require('bs58')
const isIPFS = require('is-ipfs')

module.exports = function (multihash) {
  if (Buffer.isBuffer(multihash)) {
    multihash = bs58.encode(multihash)
  }
  if (typeof multihash !== 'string') {
    throw new Error('unexpected multihash type: ' + typeof multihash)
  }
  if (!isIPFS.multihash(multihash.split('/')[0])) {
    throw new Error('not valid multihash')
  }
  return multihash
}