Merge pull request #5 from ipld/feat/isCID

feat: new method: isLink

README.md

@@ -33,6 +33,8 @@ The primary goal of this module is to define an interface that IPLD formats can
 - [JavaScript ipld-dag-pb](https://github.com/ipld/js-ipld-dag-pb)
 - [JavaScript ipld-dag-cbor](https://github.com/ipld/js-ipld-dag-cbor)
 - [JavaScript ipld-eth-block](https://github.com/ipld/js-ipld-eth-block)
+- [JavaScript ipld-eth-tx](https://github.com/ipld/js-ipld-eth-tx)
+- [JavaScript ipld-bencode](https://github.com/ipld/js-ipld-bencode)
 
 Send in a PR if you find or write one!
 
@@ -70,7 +72,6 @@ A valid (read: that follows this interface) IPLD format implementation the follo
 
 `callback` must have the signature `function (err, dagNode)`, where `err` is an Error if the function fails and `dagNode` is the dagNode that got deserialized in the process.
 
-
 #### `util.cid(dagNode, callback)`
 
 > get the CID of the dagNode
@@ -98,6 +99,18 @@ Options include:
 
 `callback` must have the signature `function (err, result)`, where `err` is an Error if the function fails and `result` is an array of objects containing `path:value` tuples, such as: `[ { '/foo': 'bar' } ...]`
 
+#### `resolver.isLink(binaryBlob, path, callback)`
+
+> returns an IPLD Link of a given path, if it is a valid link, false otherwise.
+
+`callback` must have the signature `function (err, link)`, where `err` is an Error if the function fails and `link` is the CID that was in a given path. `link` follows the format:
+
+```JavaScript
+{
+  '/': <cid>
+}
+```
+
 ## Maintainers
 
 Captain: [@diasdavid](https://github.com/diasdavid).

circle.yml

@@ -0,0 +1,12 @@
+machine:
+  node:
+    version: stable
+
+dependencies:
+  pre:
+    - google-chrome --version
+    - wget -q -O - https://dl-ssl.google.com/linux/linux_signing_key.pub | sudo apt-key add -
+    - sudo sh -c 'echo "deb [arch=amd64] http://dl.google.com/linux/chrome/deb/ stable main" >> /etc/apt/sources.list.d/google.list'
+    - sudo apt-get update
+    - sudo apt-get --only-upgrade install google-chrome-stable
+    - google-chrome --version