diff --git a/ontio-std/src/abi/source.rs b/ontio-std/src/abi/source.rs
index dd71f8d..ad36690 100644
--- a/ontio-std/src/abi/source.rs
+++ b/ontio-std/src/abi/source.rs
@@ -82,12 +82,12 @@ impl<'a> Source<'a> {
         T::decode(self)
     }
 
-    pub(crate) fn read_address(&mut self) -> Result<&'a Address, Error> {
+    pub fn read_address(&mut self) -> Result<&'a Address, Error> {
         let buf = self.next_bytes(20)?;
         Ok(unsafe { &*(buf.as_ptr() as *const Address) })
     }
 
-    pub(crate) fn read_h256(&mut self) -> Result<&'a H256, Error> {
+    pub fn read_h256(&mut self) -> Result<&'a H256, Error> {
         let buf = self.next_bytes(32)?;
         Ok(unsafe { &*(buf.as_ptr() as *const H256) })
     }
diff --git a/ontio-std/src/runtime.rs b/ontio-std/src/runtime.rs
index 9c33097..fc8bbb7 100644
--- a/ontio-std/src/runtime.rs
+++ b/ontio-std/src/runtime.rs
@@ -36,7 +36,7 @@ mod env {
             author_len: u32, email_ptr: *const u8, email_len: u32, desc_ptr: *const u8,
             desc_len: u32, new_addr_ptr: *mut u8,
         ) -> u32;
-        pub fn ontio_contract_delete() -> !;
+        pub fn ontio_contract_destroy() -> !;
     }
 }
 
@@ -187,7 +187,7 @@ pub fn contract_migrate(
 ///delete the contract
 pub fn contract_delete() -> ! {
     unsafe {
-        env::ontio_contract_delete();
+        env::ontio_contract_destroy();
     }
 }
 ///Save key-value as a key-value pair