diff --git a/vote-interface/src/state/mod.rs b/vote-interface/src/state/mod.rs
index 21ee84511..d94cfd45a 100644
--- a/vote-interface/src/state/mod.rs
+++ b/vote-interface/src/state/mod.rs
@@ -935,6 +935,7 @@ mod tests {
                 authorized_voter: original_voter,
                 authorized_withdrawer: original_voter,
                 commission: 0,
+                bls_pubkey_compressed: None,
             },
             &Clock::default(),
         );
@@ -1002,6 +1003,7 @@ mod tests {
                 authorized_voter: original_voter,
                 authorized_withdrawer: original_voter,
                 commission: 0,
+                bls_pubkey_compressed: None,
             },
             &Clock::default(),
         );
@@ -1100,6 +1102,7 @@ mod tests {
                 authorized_voter: original_voter,
                 authorized_withdrawer: original_voter,
                 commission: 0,
+                bls_pubkey_compressed: None,
             },
             &Clock::default(),
         );
@@ -1217,6 +1220,7 @@ mod tests {
                 authorized_voter: Pubkey::new_unique(),
                 authorized_withdrawer: Pubkey::new_unique(),
                 commission: 0,
+                bls_pubkey_compressed: None,
             },
             &Clock::default(),
         );
diff --git a/vote-interface/src/state/vote_instruction_data.rs b/vote-interface/src/state/vote_instruction_data.rs
index 136f2d71c..988067ecc 100644
--- a/vote-interface/src/state/vote_instruction_data.rs
+++ b/vote-interface/src/state/vote_instruction_data.rs
@@ -1,9 +1,11 @@
 #[cfg(feature = "serde")]
 use serde_derive::{Deserialize, Serialize};
+#[cfg(feature = "serde")]
+use serde_with::serde_as;
 #[cfg(feature = "frozen-abi")]
 use solana_frozen_abi_macro::{frozen_abi, AbiExample};
 use {
-    crate::state::{Lockout, MAX_LOCKOUT_HISTORY},
+    crate::state::{Lockout, BLS_PUBLIC_KEY_COMPRESSED_SIZE, MAX_LOCKOUT_HISTORY},
     solana_clock::{Slot, UnixTimestamp},
     solana_hash::Hash,
     solana_pubkey::Pubkey,
@@ -192,6 +194,7 @@ impl TowerSync {
     }
 }
 
+#[cfg_attr(feature = "serde", cfg_eval::cfg_eval, serde_as)]
 #[cfg_attr(feature = "serde", derive(Deserialize, Serialize))]
 #[derive(Default, Debug, PartialEq, Eq, Clone, Copy)]
 pub struct VoteInit {
@@ -199,6 +202,13 @@ pub struct VoteInit {
     pub authorized_voter: Pubkey,
     pub authorized_withdrawer: Pubkey,
     pub commission: u8,
+
+    /// Compressed BLS pubkey for Alpenglow.
+    #[cfg_attr(
+        feature = "serde",
+        serde_as(as = "Option<[_; BLS_PUBLIC_KEY_COMPRESSED_SIZE]>")
+    )]
+    pub bls_pubkey_compressed: Option<[u8; BLS_PUBLIC_KEY_COMPRESSED_SIZE]>,
 }
 
 #[cfg_attr(feature = "serde", derive(Deserialize, Serialize))]
diff --git a/vote-interface/src/state/vote_state_v3.rs b/vote-interface/src/state/vote_state_v3.rs
index 20270950f..3341ae02d 100644
--- a/vote-interface/src/state/vote_state_v3.rs
+++ b/vote-interface/src/state/vote_state_v3.rs
@@ -12,7 +12,9 @@ use {
         MAX_LOCKOUT_HISTORY, VOTE_CREDITS_GRACE_SLOTS, VOTE_CREDITS_MAXIMUM_PER_SLOT,
     },
     crate::{
-        authorized_voters::AuthorizedVoters, error::VoteError, state::DEFAULT_PRIOR_VOTERS_OFFSET,
+        authorized_voters::AuthorizedVoters,
+        error::VoteError,
+        state::{VoteStateV4, DEFAULT_PRIOR_VOTERS_OFFSET},
     },
     solana_clock::{Clock, Epoch, Slot, UnixTimestamp},
     solana_instruction_error::InstructionError,
@@ -513,3 +515,26 @@ impl VoteStateV3 {
             && data[VERSION_OFFSET..DEFAULT_PRIOR_VOTERS_END] != [0; DEFAULT_PRIOR_VOTERS_OFFSET]
     }
 }
+
+impl From<VoteStateV4> for VoteStateV3 {
+    fn from(vote_state: VoteStateV4) -> Self {
+        let commission_bps = vote_state
+            .inflation_rewards_commission_bps
+            .checked_add(vote_state.block_revenue_commission_bps)
+            .expect("Inflation rewards commission and block revenue commission bps overflow.");
+
+        let commission = commission_bps.div_ceil(10_000) as u8;
+
+        Self {
+            node_pubkey: vote_state.node_pubkey,
+            authorized_withdrawer: vote_state.authorized_withdrawer,
+            commission,
+            votes: vote_state.votes,
+            root_slot: vote_state.root_slot,
+            authorized_voters: vote_state.authorized_voters,
+            prior_voters: CircBuf::default(),
+            epoch_credits: vote_state.epoch_credits,
+            last_timestamp: vote_state.last_timestamp,
+        }
+    }
+}
diff --git a/vote-interface/src/state/vote_state_v4.rs b/vote-interface/src/state/vote_state_v4.rs
index 448d815f5..cd25a6f93 100644
--- a/vote-interface/src/state/vote_state_v4.rs
+++ b/vote-interface/src/state/vote_state_v4.rs
@@ -8,12 +8,11 @@ use serde_derive::{Deserialize, Serialize};
 use serde_with::serde_as;
 #[cfg(feature = "frozen-abi")]
 use solana_frozen_abi_macro::{frozen_abi, AbiExample};
-#[cfg(any(target_os = "solana", feature = "bincode"))]
-use solana_instruction::error::InstructionError;
 use {
     super::{BlockTimestamp, LandedVote, BLS_PUBLIC_KEY_COMPRESSED_SIZE},
-    crate::authorized_voters::AuthorizedVoters,
-    solana_clock::{Epoch, Slot},
+    crate::{authorized_voters::AuthorizedVoters, state::VoteInit},
+    solana_clock::{Clock, Epoch, Slot},
+    solana_instruction_error::InstructionError,
     solana_pubkey::Pubkey,
     std::{collections::VecDeque, fmt::Debug},
 };
@@ -71,6 +70,21 @@ pub struct VoteStateV4 {
 }
 
 impl VoteStateV4 {
+    pub fn new(vote_init: &VoteInit, clock: &Clock) -> Self {
+        let inflation_rewards_commission_bps = (vote_init.commission as u16)
+            .checked_mul(10_000)
+            .expect("Turning commission into basis points results in an overflow.");
+
+        Self {
+            node_pubkey: vote_init.node_pubkey,
+            authorized_voters: AuthorizedVoters::new(clock.epoch, vote_init.authorized_voter),
+            authorized_withdrawer: vote_init.authorized_withdrawer,
+            inflation_rewards_commission_bps,
+            bls_pubkey_compressed: vote_init.bls_pubkey_compressed,
+            ..VoteStateV4::default()
+        }
+    }
+
     /// Upper limit on the size of the Vote State
     /// when votes.len() is MAX_LOCKOUT_HISTORY.
     pub const fn size_of() -> usize {
@@ -214,4 +228,13 @@ impl VoteStateV4 {
             ..Self::default()
         }
     }
+
+    pub fn commission(&self) -> Result<u8, InstructionError> {
+        let commission_bps = self
+            .inflation_rewards_commission_bps
+            .checked_add(self.block_revenue_commission_bps)
+            .ok_or(InstructionError::ArithmeticOverflow)?;
+
+        Ok(commission_bps.div_ceil(10_000) as u8)
+    }
 }