diff --git a/src/clj/commiteth/eth/core.clj b/src/clj/commiteth/eth/core.clj
index 64c2601..67252ea 100644
--- a/src/clj/commiteth/eth/core.clj
+++ b/src/clj/commiteth/eth/core.clj
@@ -95,7 +95,7 @@
         value         (format "0x%x" 1)]
     (send-transaction (eth-account) nil value {:data data})))
 
-(defn- format-call-params
+(defn format-call-params
   [method-id & params]
   (let [params (join (map format-param params))]
     (str method-id params)))
@@ -108,7 +108,7 @@
 (defn execute
   [from contract method-id & params]
   (let [data (apply format-call-params method-id params)
-        value (format "0x%x" 1)]
+        value (format "0x%x" 0)]
     (send-transaction from contract value {:data data})))