diff --git a/src/clj/commiteth/eth/erc20.clj b/src/clj/commiteth/eth/erc20.clj
new file mode 100644
index 0000000..fd0c8b5
--- /dev/null
+++ b/src/clj/commiteth/eth/erc20.clj
@@ -0,0 +1,11 @@
+(ns commiteth.eth.erc20
+  (:require [commiteth.eth.core :as eth]
+            [clojure.tools.logging :as log]))
+
+(defn balance-of
+  [token of]
+  (log/debug "erc20.balance-of(token, of)" token of)
+  (eth/call token
+            "0x70a08231"
+            of))
+            
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