fix(bitswap.unwant) parse CID from arg just like block.add does

Author: wraithgar

src/bitswap/unwant.js

@@ -1,13 +1,33 @@
 'use strict'
 
 const promisify = require('promisify-es6')
+const CID = require('cids')
 
 module.exports = (send) => {
   return promisify((args, opts, callback) => {
     if (typeof (opts) === 'function') {
       callback = opts
       opts = {}
     }
+
+    // Mirrors block.get's parsing of the CID
+    let cid
+    try {
+      if (CID.isCID(args)) {
+        cid = args
+        args = cid.toBaseEncodedString()
+      } else if (Buffer.isBuffer(args)) {
+        cid = new CID(args)
+        args = cid.toBaseEncodedString()
+      } else if (typeof args === 'string') {
+        cid = new CID(args)
+      } else {
+        return callback(new Error('invalid argument'))
+      }
+    } catch (err) {
+      return callback(err)
+    }
+
     send({
       path: 'bitswap/unwant',
       args: args,