add Account::new_data (#4701)

* add account_new_data

* fixup

* fixup

programs/storage_program/tests/storage_processor.rs

@@ -122,7 +122,7 @@ fn test_proof_bounds() {
         Hash::default(),
     );
     // the proof is for segment 0, need to move the slot into segment 2
-    let mut current_account = current::create_account(1);
+    let mut current_account = current::create_account(1, 0, 0, 0);
     Current::to(
         &Current {
             slot: SLOTS_PER_SEGMENT * 2,
@@ -152,7 +152,7 @@ fn test_serialize_overflow() {
     let tick_pubkey = Pubkey::new_rand();
     let mut keyed_accounts = Vec::new();
     let mut user_account = Account::default();
-    let mut current_account = current::create_account(1);
+    let mut current_account = current::create_account(1, 0, 0, 0);
     keyed_accounts.push(KeyedAccount::new(&pubkey, true, &mut user_account));
     keyed_accounts.push(KeyedAccount::new(&tick_pubkey, false, &mut current_account));
 
@@ -181,7 +181,7 @@ fn test_invalid_accounts_len() {
         Hash::default(),
     );
     // move tick height into segment 1
-    let mut current_account = current::create_account(1);
+    let mut current_account = current::create_account(1, 0, 0, 0);
     Current::to(
         &Current {
             slot: 16,
@@ -240,7 +240,7 @@ fn test_submit_mining_ok() {
         Hash::default(),
     );
     // move slot into segment 1
-    let mut current_account = current::create_account(1);
+    let mut current_account = current::create_account(1, 0, 0, 0);
     Current::to(
         &Current {
             slot: SLOTS_PER_SEGMENT,

runtime/src/bank.rs

@@ -32,7 +32,7 @@ use solana_sdk::inflation::Inflation;
 use solana_sdk::native_loader;
 use solana_sdk::pubkey::Pubkey;
 use solana_sdk::signature::{Keypair, Signature};
-use solana_sdk::syscall::current::{self, Current};
+use solana_sdk::syscall::current;
 use solana_sdk::syscall::fees::{self, Fees};
 use solana_sdk::syscall::slot_hashes::{self, SlotHashes};
 use solana_sdk::syscall::tick_height::{self, TickHeight};
@@ -402,15 +402,15 @@ impl Bank {
     }
 
     fn update_current(&self) {
-        let mut account = current::create_account(1);
+        self.store_account(
-        let current = Current {
+            &current::id(),
-            slot: self.slot,
+            &current::create_account(
-            epoch: self.epoch_schedule.get_epoch(self.slot),
+                1,
-            stakers_epoch: self.epoch_schedule.get_stakers_epoch(self.slot),
+                self.slot,
-        };
+                self.epoch_schedule.get_epoch(self.slot),
-        current.to(&mut account).unwrap();
+                self.epoch_schedule.get_stakers_epoch(self.slot),
-
+            ),
-        self.store_account(&current::id(), &account);
+        );
     }
 
     fn update_slot_hashes(&self) {

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 {
+pub fn create_account(lamports: u64, slot: u64, epoch: u64, stakers_epoch: u64) -> Account {
-    Account::new(lamports, Current::size_of(), &syscall::id())
+    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());
     }