diff --git a/interface.go b/interface.go
index 7640c57..2c04628 100644
--- a/interface.go
+++ b/interface.go
@@ -13,11 +13,8 @@ import (
 type Interface interface { // type Exchanger interface
 	Fetcher
 
-	// TODO Should callers be concerned with whether the block was made
-	// available on the network?
-	HasBlock(context.Context, blocks.Block) error
-
-	IsOnline() bool
+	// NotifyNewBlocks tells the exchange that new blocks are available and can be served.
+	NotifyNewBlocks(ctx context.Context, blocks ...blocks.Block) error
 
 	io.Closer
 }
diff --git a/version.json b/version.json
index 557859c..1437d5b 100644
--- a/version.json
+++ b/version.json
@@ -1,3 +1,3 @@
 {
-  "version": "v0.1.0"
+  "version": "v0.2.0"
 }