diff --git a/contract.go b/contract.go
index d2fddaf..b9694bc 100644
--- a/contract.go
+++ b/contract.go
@@ -1,4 +1,6 @@
-package smart_contract_exchange
+//go:build !exclude_crypto_ecdsa
+
+package crypto_ex
 
 import (
 	"encoding/json"
diff --git a/contract.yml b/contract.yml
new file mode 100644
index 0000000..a7b84e3
--- /dev/null
+++ b/contract.yml
@@ -0,0 +1,8 @@
+name: crypto_ex
+build:
+  include:
+    - .
+    - !exclude:
+      - vendor/**
+permissions:
+    - methods: '*'