add bank hash to votes (#4381)

sdk/src/packet.rs

@@ -1,2 +1,5 @@
 /// Maximum over-the-wire size of a Transaction
-pub const PACKET_DATA_SIZE: usize = 512;
+///   1280 is IPv6 minimum MTU
+///   40 bytes is the size of the IPv6 header
+///   8 bytes is the size of the fragment header
+pub const PACKET_DATA_SIZE: usize = 1280 - 40 - 8;

sdk/src/syscall/mod.rs

@@ -2,7 +2,7 @@
 //!
 use crate::pubkey::Pubkey;
 
-pub mod slothashes;
+pub mod slot_hashes;
 
 /// "Sysca11111111111111111111111111111111111111"
 ///   owner pubkey for syscall accounts

sdk/src/syscall/slot_hashes.rs

@@ -17,6 +17,10 @@ pub fn id() -> Pubkey {
     Pubkey::new(&SYSCALL_SLOT_HASHES_ID)
 }
 
+pub fn check_id(pubkey: &Pubkey) -> bool {
+    pubkey.as_ref() == SYSCALL_SLOT_HASHES_ID
+}
+
 use crate::account_utils::State;
 use std::ops::{Deref, DerefMut};
 #[derive(Serialize, Deserialize)]