chore: update to new multiformats (#42)

BREAKING CHANGE: uses the CID class from the new multiformats module

Co-authored-by: Marcin Rataj <lidel@lidel.org>

package.json

@@ -41,12 +41,10 @@
     "release-major": "aegir release --type major"
   },
   "dependencies": {
-    "cids": "^1.1.6",
     "iso-url": "^1.1.3",
     "mafmt": "^9.0.0",
-    "multiaddr": "^9.0.1",
-    "multibase": "^4.0.2",
-    "multihashes": "^4.0.2",
+    "multiaddr": "^10.0.0",
+    "multiformats": "^9.0.0",
     "uint8arrays": "^2.1.3"
   },
   "devDependencies": {

src/index.js

@@ -1,10 +1,11 @@
 'use strict'
 
-const multihash = require('multihashes')
-const multibase = require('multibase')
+const { base58btc } = require('multiformats/bases/base58')
+const { base32 } = require('multiformats/bases/base32')
+const Digest = require('multiformats/hashes/digest')
 const { Multiaddr } = require('multiaddr')
 const mafmt = require('mafmt')
-const CID = require('cids')
+const { CID } = require('multiformats/cid')
 const { URL } = require('iso-url')
 const uint8ArrayToString = require('uint8arrays/to-string')
 
@@ -27,31 +28,41 @@ const fqdnWithTld = /^(([a-z0-9]|[a-z0-9][a-z0-9-]*[a-z0-9])\.)+([a-z0-9]|[a-z0-
 function isMultihash (hash) {
   const formatted = convertToString(hash)
   try {
-    multihash.decode(multibase.decode('z' + formatted))
-    return true
-  } catch (e) {
+    Digest.decode(base58btc.decode('z' + formatted))
+  } catch {
     return false
   }
+
+  return true
 }
 
 /**
  * @param {*} hash
  */
-function isMultibase (hash) {
+function isBase32EncodedMultibase (hash) {
   try {
-    return multibase.isEncoded(hash)
-  } catch (e) {
+    base32.decode(hash)
+  } catch {
     return false
   }
+
+  return true
 }
 
 /**
  * @param {*} hash
  */
 function isCID (hash) {
   try {
-    new CID(hash) // eslint-disable-line no-new
-    return true
+    if (typeof hash === 'string') {
+      return Boolean(CID.parse(hash))
+    }
+
+    if (hash instanceof Uint8Array) {
+      return Boolean(CID.decode(hash))
+    }
+
+    return Boolean(CID.asCID(hash)) // eslint-disable-line no-new
   } catch (e) {
     return false
   }
@@ -222,7 +233,7 @@ module.exports = {
   /**
    * @param {CID | string | Uint8Array} cid
    */
-  base32cid: (cid) => (isMultibase(cid) === 'base32' && isCID(cid)),
+  base32cid: (cid) => (isBase32EncodedMultibase(cid) && isCID(cid)),
   ipfsSubdomain,
   ipnsSubdomain,
   subdomain,

test/test-cid.spec.js

@@ -3,12 +3,12 @@
 
 const { expect } = require('aegir/utils/chai')
 const isIPFS = require('../src/index')
-const CID = require('cids')
+const { CID } = require('multiformats/cid')
 const uint8ArrayFromString = require('uint8arrays/from-string')
 
 describe('ipfs cid', () => {
   it('isIPFS.cid should match a valid CID instance', (done) => {
-    const cid = new CID('QmYjtig7VJQ6XsnUjqqJvj7QaMcCAwtrgNdahSiFofrE7o')
+    const cid = CID.parse('QmYjtig7VJQ6XsnUjqqJvj7QaMcCAwtrgNdahSiFofrE7o')
     const actual = isIPFS.cid(cid)
     expect(actual).to.equal(true)
     done()