add Account::new_data (#4701)

* add account_new_data

* fixup

* fixup

sdk/src/account.rs

@@ -46,6 +46,20 @@ impl Account {
         }
     }
 
+    pub fn new_data<T: serde::Serialize>(
+        lamports: u64,
+        state: &T,
+        owner: &Pubkey,
+    ) -> Result<Account, bincode::Error> {
+        let data = bincode::serialize(state)?;
+        Ok(Account {
+            lamports,
+            data,
+            owner: *owner,
+            executable: false,
+        })
+    }
+
     pub fn deserialize_data<T: serde::de::DeserializeOwned>(&self) -> Result<T, bincode::Error> {
         bincode::deserialize(&self.data)
     }

sdk/src/syscall/current.rs

@@ -32,8 +32,17 @@ impl Current {
     }
 }
 
-pub fn create_account(lamports: u64) -> Account {
-    Account::new(lamports, Current::size_of(), &syscall::id())
+pub fn create_account(lamports: u64, slot: u64, epoch: u64, stakers_epoch: u64) -> Account {
+    Account::new_data(
+        lamports,
+        &Current {
+            slot,
+            epoch,
+            stakers_epoch,
+        },
+        &syscall::id(),
+    )
+    .unwrap()
 }
 
 #[cfg(test)]
@@ -42,7 +51,7 @@ mod tests {
 
     #[test]
     fn test_create_account() {
-        let account = create_account(1);
+        let account = create_account(1, 0, 0, 0);
         let current = Current::from(&account).unwrap();
         assert_eq!(current, Current::default());
     }