diff --git a/solana/bridge/program/src/api/governance.rs b/solana/bridge/program/src/api/governance.rs
index 972f41e2..212e4c7a 100644
--- a/solana/bridge/program/src/api/governance.rs
+++ b/solana/bridge/program/src/api/governance.rs
@@ -63,6 +63,7 @@ pub fn upgrade_contract(
         accs.upgrade_authority.key,
         accs.spill.key,
     );
+
     let _seeds = accs.upgrade_authority.self_seeds(None);
     invoke_signed(&upgrade_ix, ctx.accounts, &[])?;
 
@@ -82,6 +83,7 @@ pub struct UpgradeGuardianSet<'b> {
 
     /// Old guardian set
     pub guardian_set_old: GuardianSet<'b, { AccountState::Initialized }>,
+
     /// New guardian set
     pub guardian_set_new: GuardianSet<'b, { AccountState::Uninitialized }>,
 }
diff --git a/solana/bridge/program/src/api/initialize.rs b/solana/bridge/program/src/api/initialize.rs
index 88a073a6..f582aa7f 100644
--- a/solana/bridge/program/src/api/initialize.rs
+++ b/solana/bridge/program/src/api/initialize.rs
@@ -6,6 +6,7 @@ use crate::{
         GuardianSetDerivationData,
     },
     types::*,
+    MAX_LEN_GUARDIAN_KEYS,
 };
 use solitaire::{
     CreationLamports::Exempt,
@@ -25,22 +26,35 @@ pub struct Initialize<'b> {
 impl<'b> InstructionContext<'b> for Initialize<'b> {
 }
 
+#[derive(BorshDeserialize, BorshSerialize, Default)]
+pub struct InitializeData {
+    /// Period for how long a guardian set is valid after it has been replaced by a new one.  This
+    /// guarantees that VAAs issued by that set can still be submitted for a certain period.  In
+    /// this period we still trust the old guardian set.
+    pub guardian_set_expiration_time: u32,
+
+    /// Amount of lamports that needs to be paid to the protocol to post a message
+    pub fee: u64,
+
+    /// Initial Guardian Set
+    pub initial_guardians: Vec<[u8; 20]>,
+}
+
 pub fn initialize(
     ctx: &ExecutionContext,
     accs: &mut Initialize,
-    config: BridgeConfig,
+    data: InitializeData,
 ) -> Result<()> {
-    accs.guardian_set.index = 0;
+    let index = 0;
+
+    // Allocate a default guardian set, with zeroed keys.
+    accs.guardian_set.index = index;
     accs.guardian_set.creation_time = 0;
-    accs.guardian_set.keys = Vec::with_capacity(20);
-    accs.guardian_set.keys.push([
-        0x1d, 0x72, 0x87, 0x7e, 0xb2, 0xd8, 0x98, 0x73, 0x8a, 0xfe, 0x94, 0xc6, 0x10, 0x11, 0x52,
-        0xed, 0xe0, 0x43, 0x5d, 0xe9,
-    ]);
+    accs.guardian_set.keys.extend(&data.initial_guardians);
 
     // Initialize Guardian Set
     accs.guardian_set.create(
-        &GuardianSetDerivationData { index: 0 },
+        &GuardianSetDerivationData { index },
         ctx,
         accs.payer.key,
         Exempt,
@@ -48,8 +62,11 @@ pub fn initialize(
 
     // Initialize the Bridge state for the first time.
     accs.bridge.create(ctx, accs.payer.key, Exempt)?;
-    accs.bridge.guardian_set_index = 0;
-    accs.bridge.config = config;
+    accs.bridge.guardian_set_index = index;
+    accs.bridge.config = BridgeConfig {
+        guardian_set_expiration_time: data.guardian_set_expiration_time,
+        fee: data.fee,
+    };
 
     // Initialize the fee collector account so it's rent exempt and will keep funds
     accs.fee_collector.create(
diff --git a/solana/bridge/program/src/api/post_vaa.rs b/solana/bridge/program/src/api/post_vaa.rs
index ec3eeeff..f4b3490d 100644
--- a/solana/bridge/program/src/api/post_vaa.rs
+++ b/solana/bridge/program/src/api/post_vaa.rs
@@ -207,6 +207,7 @@ fn check_integrity<'r>(
         v.write_u32::<BigEndian>(vaa.nonce)?;
         v.write_u16::<BigEndian>(vaa.emitter_chain)?;
         v.write(&vaa.emitter_address)?;
+        v.write_u64::<BigEndian>(vaa.sequence)?;
         v.write(&vaa.payload)?;
         v.into_inner()
     };
diff --git a/solana/bridge/program/src/instructions.rs b/solana/bridge/program/src/instructions.rs
index f52752eb..069aaf80 100644
--- a/solana/bridge/program/src/instructions.rs
+++ b/solana/bridge/program/src/instructions.rs
@@ -37,6 +37,7 @@ pub fn initialize(
     payer: Pubkey,
     fee: u64,
     guardian_set_expiration_time: u32,
+    initial_guardians: &[[u8; 20]],
 ) -> solitaire::Result<Instruction> {
     let bridge = Bridge::<'_, { AccountState::Uninitialized }>::key(None, &program_id);
     let guardian_set = GuardianSet::<'_, { AccountState::Uninitialized }>::key(
@@ -55,7 +56,8 @@ pub fn initialize(
             AccountMeta::new_readonly(sysvar::rent::id(), false),
             AccountMeta::new_readonly(solana_program::system_program::id(), false),
         ],
-        data: crate::instruction::Instruction::Initialize(BridgeConfig {
+        data: crate::instruction::Instruction::Initialize(InitializeData {
+            initial_guardians: initial_guardians.to_vec(),
             fee,
             guardian_set_expiration_time,
         })
diff --git a/solana/bridge/program/src/types.rs b/solana/bridge/program/src/types.rs
index f931ce2f..d91b9e9b 100644
--- a/solana/bridge/program/src/types.rs
+++ b/solana/bridge/program/src/types.rs
@@ -246,6 +246,7 @@ impl DeserializeGovernancePayload for GovernancePayloadUpgrade {
 pub struct GovernancePayloadGuardianSetChange {
     // New GuardianSetIndex
     pub new_guardian_set_index: u32,
+
     // New GuardianSet
     pub new_guardian_set: Vec<[u8; 20]>,
 }
diff --git a/solana/bridge/program/src/vaa.rs b/solana/bridge/program/src/vaa.rs
index d03cf87c..d658a5bd 100644
--- a/solana/bridge/program/src/vaa.rs
+++ b/solana/bridge/program/src/vaa.rs
@@ -119,7 +119,8 @@ impl<'b, T: DeserializePayload> PayloadMessage<'b, T> {
 #[derive(FromAccounts)]
 pub struct ClaimableVAA<'b, T: DeserializePayload> {
     // Signed message for the transfer
-    pub message: PayloadMessage<'b, T>, // TODO use bridge type here that does verifications
+    // TODO use bridge type here that does verifications
+    pub message: PayloadMessage<'b, T>,
 
     // Claim account to prevent double spending
     pub claim: Claim<'b, { AccountState::Uninitialized }>,
@@ -170,6 +171,7 @@ impl<'b, T: DeserializePayload> ClaimableVAA<'b, T> {
             payer,
             Exempt,
         )?;
+
         self.claim.claimed = true;
 
         Ok(())