fix: improve bitswap wantlist and unwant docs

License: MIT
Signed-off-by: Alan Shaw <alan@tableflip.io>

Author: alanshaw

SPEC/BITSWAP.md

@@ -10,31 +10,52 @@
 
 ##### `Go` **WIP**
 
-##### `JavaScript` - ipfs.bitswap.unwant(cid)
+##### `JavaScript` - ipfs.bitswap.unwant(cid, [callback])
 
 `cid` is a [cid][cid] which can be passed as:
 
 - CID, a CID instance
 - String, the base58 encoded version of the multihash
 
+`callback` must follow `function (err) {}` signature, where `err` is an error if the operation was not successful.
+
+  **Example:**
+
+  ```JavaScript
+  ipfs.bitswap.unwant('QmSoLSafTMBsPKadTEgaXctDQVcqN88CNLHXMkTNwMKPnu', (err) => {
+    if (err) throw err
+    console.log('Done')
+  })
+  ```
+
 ##### `Go` **WIP**
 
 ### `bitswap.wantlist`
 
-> Returns the wantlist, optionally limited by peerID
+> Returns the wantlist, optionally filtered by peer ID
 
 #### `Go` **WIP**
 
-#### `JavaScript` - ipfs.bitswap.wantlist([peerId])
+#### `JavaScript` - ipfs.bitswap.wantlist([peerId], [callback])
+
+`callback` must follow `function (err, list) {}` signature, where `err` is an error if the operation was not successful. `list` is an Object containing the following keys:
+
+- `Keys` An array of objects containing the following keys:
+    - `/` A string multihash
+
+If no `callback` is passed, a promise is returned.
+
+**Example:**
 
 ```JavaScript
 ipfs.bitswap.wantlist((err, list) => console.log(list))
 
-//[ { Wantlist object }, ... ]
+// { Keys: [{ '/': 'QmHash' }] }
 
 ipfs.bitswap.wantlist(peerId, (err, list) => console.log(list))
 
-//[ { Wantlist object }, ... ]
+// { Keys: [{ '/': 'QmHash' }] }
+```
 
 #### `bitswap.stat`