Give pin update a sensible return value

update multi-addr

Author: ianopolous

lib/multiaddr.jar

@@ -177,9 +177,11 @@ public List<Multihash> rm(Multihash hash, boolean recursive) throws IOException
             return ((List<Object>) json.get("Pins")).stream().map(x -> Cid.decode((String) x)).collect(Collectors.toList());
         }
 
-        public Object update(Multihash existing, Multihash modified, boolean unpin) throws IOException {
-            Object obj = retrieveAndParse("pin/update?stream-channels=true&arg=" + existing + "&arg=" + modified + "&unpin=" + unpin);
-            return obj;
+        public List<MultiAddress> update(Multihash existing, Multihash modified, boolean unpin) throws IOException {
+            return ((List<Object>)((Map)retrieveAndParse("pin/update?stream-channels=true&arg=" + existing + "&arg=" + modified + "&unpin=" + unpin)).get("Pins"))
+                    .stream()
+                    .map(x -> new MultiAddress((String) x))
+                    .collect(Collectors.toList());
         }
     }
 

src/main/java/io/ipfs/api/IPFS.java

@@ -215,7 +215,7 @@ public void pinUpdate() {
 
             CborObject.CborList root2 = new CborObject.CborList(Arrays.asList(new CborObject.CborMerkleLink(hashChild1), new CborObject.CborLong(42)));
             MerkleNode root2Res = ipfs.block.put(Collections.singletonList(root2.toByteArray()), Optional.of("cbor")).get(0);
-            ipfs.pin.update(root1Res.hash, root2Res.hash, true);
+            List<MultiAddress> update = ipfs.pin.update(root1Res.hash, root2Res.hash, true);
 
             Map<Multihash, Object> ls = ipfs.pin.ls(IPFS.PinType.all);
             boolean childPresent = ls.containsKey(hashChild1);