Remove hash field from account (#9915)

sdk/src/account.rs

@@ -1,4 +1,4 @@
-use crate::{clock::Epoch, hash::Hash, instruction::InstructionError, pubkey::Pubkey};
+use crate::{clock::Epoch, instruction::InstructionError, pubkey::Pubkey};
 use std::{
     cell::{Ref, RefCell, RefMut},
     cmp, fmt,
@@ -8,7 +8,7 @@ use std::{
 
 /// An Account with data that is stored on chain
 #[repr(C)]
-#[derive(Serialize, Deserialize, Clone, Default)]
+#[derive(Serialize, Deserialize, PartialEq, Eq, Clone, Default)]
 #[serde(rename_all = "camelCase")]
 pub struct Account {
     /// lamports in the account
@@ -22,26 +22,8 @@ pub struct Account {
     pub executable: bool,
     /// the epoch at which this account will next owe rent
     pub rent_epoch: Epoch,
-    /// Hash of this account's state, skip serializing as to not expose to external api
-    /// Used for keeping the accounts state hash updated.
-    #[serde(skip)]
-    pub hash: Hash,
 }
 
-/// skip comparison of account.hash, since it is only meaningful when the account is loaded in a
-/// given fork and some tests do not have that.
-impl PartialEq for Account {
-    fn eq(&self, other: &Self) -> bool {
-        self.lamports == other.lamports
-            && self.data == other.data
-            && self.owner == other.owner
-            && self.executable == other.executable
-            && self.rent_epoch == other.rent_epoch
-    }
-}
-
-impl Eq for Account {}
-
 impl fmt::Debug for Account {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         let data_len = cmp::min(64, self.data.len());
@@ -52,14 +34,13 @@ impl fmt::Debug for Account {
         };
         write!(
             f,
-            "Account {{ lamports: {} data.len: {} owner: {} executable: {} rent_epoch: {}{} hash: {} }}",
+            "Account {{ lamports: {} data.len: {} owner: {} executable: {} rent_epoch: {}{} }}",
             self.lamports,
             self.data.len(),
             self.owner,
             self.executable,
             self.rent_epoch,
             data_str,
-            self.hash,
         )
     }
 }

sdk/src/native_loader.rs

@@ -1,4 +1,4 @@
-use crate::{account::Account, hash::Hash};
+use crate::account::Account;
 
 crate::declare_id!("NativeLoader1111111111111111111111111111111");
 
@@ -10,6 +10,5 @@ pub fn create_loadable_account(name: &str) -> Account {
         data: name.as_bytes().to_vec(),
         executable: true,
         rent_epoch: 0,
-        hash: Hash::default(),
     }
 }