Update input_binding.go (#12)

bindings/input_binding.go

@@ -1,6 +1,9 @@
 package bindings
 
+// InputBinding is the interface to define a binding that triggers on incoming events
 type InputBinding interface {
-	Init(metadata Metadata) error
-	Read(handler func(*ReadResponse) error) error
+    // Init passes connection and properties metadata to the binding implementation
+    Init(metadata Metadata) error
+    // Read is a blocking method that triggers the callback function whenever an event arrives
+    Read(handler func(*ReadResponse) error) error
 }