diff --git a/Cargo.lock b/Cargo.lock
index 964162a4..0b6a1377 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -5024,7 +5024,7 @@ checksum = "a9cf16495d9eb53e3d04e72366a33bb1c20c24e78c171d8b8f5978357b63ae95"
 dependencies = [
  "bincode",
  "serde_core",
- "solana-address 2.2.0",
+ "solana-address 2.6.0",
  "solana-program-error",
  "solana-program-memory",
 ]
@@ -5094,14 +5094,14 @@ version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a2ecac8e1b7f74c2baa9e774c42817e3e75b20787134b76cc4d45e8a604488f5"
 dependencies = [
- "solana-address 2.2.0",
+ "solana-address 2.6.0",
 ]
 
 [[package]]
 name = "solana-address"
-version = "2.2.0"
+version = "2.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "68c5d02824391b072dc5cd0aaa85fb0af9784a21d23286a767994d1e8a322131"
+checksum = "f1384b52c435a750cc9c538760fc7bb472fd78e65a9900a2d07312c5bb335b72"
 dependencies = [
  "borsh",
  "bytemuck",
@@ -5120,7 +5120,7 @@ dependencies = [
  "solana-program-error",
  "solana-sanitize",
  "solana-sha256-hasher",
- "wincode 0.4.4",
+ "wincode",
 ]
 
 [[package]]
@@ -5704,7 +5704,7 @@ checksum = "f5e7b0ba210593ba8ddd39d6d234d81795d1671cebf3026baa10d5dc23ac42f0"
 dependencies = [
  "serde",
  "serde_derive",
- "solana-hash 4.2.0",
+ "solana-hash 4.3.0",
  "solana-sdk-ids",
  "solana-sdk-macro",
  "solana-sysvar-id",
@@ -5742,7 +5742,7 @@ checksum = "0eb265ff95e28eceda117e2e3d2d2a611ecbbfe911dfeeeecd1521814540ffab"
 dependencies = [
  "serde",
  "serde_derive",
- "solana-hash 4.2.0",
+ "solana-hash 4.3.0",
  "solana-instruction",
  "solana-nonce",
  "solana-pubkey 4.2.0",
@@ -5880,14 +5880,14 @@ version = "3.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "337c246447142f660f778cf6cb582beba8e28deb05b3b24bfb9ffd7c562e5f41"
 dependencies = [
- "solana-hash 4.2.0",
+ "solana-hash 4.3.0",
 ]
 
 [[package]]
 name = "solana-hash"
-version = "4.2.0"
+version = "4.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8064ea1d591ec791be95245058ca40f4f5345d390c200069d0f79bbf55bfae55"
+checksum = "f1b113239362cee7093bfb250467138f079a2a03673181dc15bff6ccd677912d"
 dependencies = [
  "borsh",
  "bytemuck",
@@ -5897,7 +5897,7 @@ dependencies = [
  "serde_derive",
  "solana-atomic-u64",
  "solana-sanitize",
- "wincode 0.4.4",
+ "wincode",
 ]
 
 [[package]]
@@ -5977,7 +5977,7 @@ dependencies = [
  "five8",
  "five8_core",
  "rand 0.9.2",
- "solana-address 2.2.0",
+ "solana-address 2.6.0",
  "solana-derivation-path",
  "solana-seed-derivable",
  "solana-seed-phrase",
@@ -6094,8 +6094,8 @@ dependencies = [
  "lazy_static",
  "serde",
  "serde_derive",
- "solana-address 2.2.0",
- "solana-hash 4.2.0",
+ "solana-address 2.6.0",
+ "solana-hash 4.3.0",
  "solana-instruction",
  "solana-sanitize",
  "solana-sdk-ids",
@@ -6458,7 +6458,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7db719574990de7e8b0f55a8593ac92a5ccb42c8ce67b3e4bf05b139d5d9ee71"
 dependencies = [
  "rand 0.9.2",
- "solana-address 2.2.0",
+ "solana-address 2.6.0",
 ]
 
 [[package]]
@@ -6865,7 +6865,7 @@ version = "3.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "def234c1956ff616d46c9dd953f251fa7096ddbaa6d52b165218de97882b7280"
 dependencies = [
- "solana-address 2.2.0",
+ "solana-address 2.6.0",
 ]
 
 [[package]]
@@ -7046,7 +7046,7 @@ dependencies = [
  "serde-big-array",
  "serde_derive",
  "solana-sanitize",
- "wincode 0.5.1",
+ "wincode",
 ]
 
 [[package]]
@@ -7167,6 +7167,7 @@ dependencies = [
  "strum 0.28.0",
  "strum_macros 0.28.0",
  "test-case",
+ "wincode",
 ]
 
 [[package]]
@@ -7396,7 +7397,7 @@ dependencies = [
  "num-traits",
  "serde",
  "serde_derive",
- "solana-address 2.2.0",
+ "solana-address 2.6.0",
  "solana-instruction",
  "solana-msg",
  "solana-program-error",
@@ -7460,7 +7461,7 @@ dependencies = [
  "solana-epoch-rewards",
  "solana-epoch-schedule",
  "solana-fee-calculator",
- "solana-hash 4.2.0",
+ "solana-hash 4.3.0",
  "solana-instruction",
  "solana-last-restart-slot",
  "solana-program-entrypoint",
@@ -7494,7 +7495,7 @@ dependencies = [
  "solana-fee-calculator",
  "solana-frozen-abi",
  "solana-frozen-abi-macro",
- "solana-hash 4.2.0",
+ "solana-hash 4.3.0",
  "solana-instruction",
  "solana-last-restart-slot",
  "solana-program-entrypoint",
@@ -7515,7 +7516,7 @@ version = "3.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "17358d1e9a13e5b9c2264d301102126cf11a47fd394cdf3dec174fe7bc96e1de"
 dependencies = [
- "solana-address 2.2.0",
+ "solana-address 2.6.0",
  "solana-sdk-ids",
 ]
 
@@ -7608,8 +7609,8 @@ dependencies = [
  "bincode",
  "serde",
  "serde_derive",
- "solana-address 2.2.0",
- "solana-hash 4.2.0",
+ "solana-address 2.6.0",
+ "solana-hash 4.3.0",
  "solana-instruction",
  "solana-instruction-error",
  "solana-message",
@@ -7802,7 +7803,7 @@ dependencies = [
  "serde_derive",
  "serde_with",
  "solana-clock",
- "solana-hash 4.2.0",
+ "solana-hash 4.3.0",
  "solana-instruction",
  "solana-instruction-error",
  "solana-pubkey 4.2.0",
@@ -9190,22 +9191,9 @@ checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
 
 [[package]]
 name = "wincode"
-version = "0.4.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "466e67917609b2d40a838a5b972d1a6237c9749600cb8de8f65559b90d48485b"
-dependencies = [
- "pastey",
- "proc-macro2",
- "quote",
- "thiserror 2.0.18",
- "wincode-derive",
-]
-
-[[package]]
-name = "wincode"
-version = "0.5.1"
+version = "0.5.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a61f8f0a55eb6cae5d7b7ad2eca536a944deb9722a948525181069064ecd1abc"
+checksum = "b2f42dd20febad683d07044c5f543e57f822512ebebaf2c827705c99a0ad4575"
 dependencies = [
  "pastey",
  "proc-macro2",
diff --git a/interface/Cargo.toml b/interface/Cargo.toml
index 86bdc371..2457d053 100644
--- a/interface/Cargo.toml
+++ b/interface/Cargo.toml
@@ -33,6 +33,7 @@ solana-pubkey = { version = "4.2.0", default-features = false }
 solana-system-interface = "3.0.0"
 solana-sysvar = { version = "4.0.0", optional = true }
 solana-sysvar-id = { version = "3.1.0", optional = true }
+wincode = { version = "0.5.2", features = ["derive"],  optional = true }
 
 [target.'cfg(not(target_os = "solana"))'.dependencies]
 serde_json = { version = "1.0", optional = true }
@@ -82,3 +83,4 @@ frozen-abi = [
 ]
 serde = ["dep:serde", "dep:serde_derive", "solana-pubkey/serde", "solana-sysvar/serde"]
 sysvar = ["dep:solana-sysvar", "dep:solana-sysvar-id"]
+wincode = ["dep:wincode", "solana-pubkey/wincode"]
diff --git a/interface/src/error.rs b/interface/src/error.rs
index 84aae406..2256376e 100644
--- a/interface/src/error.rs
+++ b/interface/src/error.rs
@@ -13,6 +13,7 @@ use {
     feature = "serde",
     derive(serde_derive::Deserialize, serde_derive::Serialize)
 )]
+#[cfg_attr(feature = "wincode", derive(wincode::SchemaRead, wincode::SchemaWrite))]
 pub enum StakeError {
     // 0
     /// Not enough credits to redeem.
diff --git a/interface/src/stake_flags.rs b/interface/src/stake_flags.rs
index 05ad9053..14d35236 100644
--- a/interface/src/stake_flags.rs
+++ b/interface/src/stake_flags.rs
@@ -2,6 +2,7 @@
 use borsh::{BorshDeserialize, BorshSchema, BorshSerialize};
 
 /// Additional flags for stake state.
+#[repr(transparent)]
 #[cfg_attr(feature = "codama", derive(codama_macros::CodamaType))]
 #[derive(Copy, PartialEq, Eq, Clone, PartialOrd, Ord, Hash, Debug)]
 #[cfg_attr(feature = "frozen-abi", derive(solana_frozen_abi_macro::AbiExample))]
@@ -14,6 +15,7 @@ use borsh::{BorshDeserialize, BorshSchema, BorshSerialize};
     feature = "serde",
     derive(serde_derive::Deserialize, serde_derive::Serialize)
 )]
+#[cfg_attr(feature = "wincode", derive(wincode::SchemaRead, wincode::SchemaWrite))]
 pub struct StakeFlags {
     bits: u8,
 }
diff --git a/interface/src/stake_history.rs b/interface/src/stake_history.rs
index 508dd1d5..2763d4c8 100644
--- a/interface/src/stake_history.rs
+++ b/interface/src/stake_history.rs
@@ -13,6 +13,7 @@ pub const MAX_ENTRIES: usize = 512; // it should never take as many as 512 epoch
     feature = "serde",
     derive(serde_derive::Deserialize, serde_derive::Serialize)
 )]
+#[cfg_attr(feature = "wincode", derive(wincode::SchemaRead, wincode::SchemaWrite))]
 #[derive(Debug, PartialEq, Eq, Default, Clone)]
 pub struct StakeHistoryEntry {
     pub effective: u64,    // effective stake at this epoch
@@ -62,6 +63,7 @@ impl std::ops::Add for StakeHistoryEntry {
     feature = "serde",
     derive(serde_derive::Deserialize, serde_derive::Serialize)
 )]
+#[cfg_attr(feature = "wincode", derive(wincode::SchemaRead, wincode::SchemaWrite))]
 #[derive(Debug, PartialEq, Eq, Default, Clone)]
 pub struct StakeHistory(Vec<(Epoch, StakeHistoryEntry)>);
 
diff --git a/interface/src/state.rs b/interface/src/state.rs
index 9f25ce9a..e7fe0310 100644
--- a/interface/src/state.rs
+++ b/interface/src/state.rs
@@ -158,6 +158,7 @@ impl StakeState {
     feature = "serde",
     derive(serde_derive::Deserialize, serde_derive::Serialize)
 )]
+#[cfg_attr(feature = "wincode", derive(wincode::SchemaRead, wincode::SchemaWrite))]
 #[allow(clippy::large_enum_variant)]
 pub enum StakeStateV2 {
     #[default]
@@ -282,11 +283,13 @@ impl StakeStateV2 {
     feature = "serde",
     derive(serde_derive::Deserialize, serde_derive::Serialize)
 )]
+#[cfg_attr(feature = "wincode", derive(wincode::SchemaRead, wincode::SchemaWrite))]
 pub enum StakeAuthorize {
     Staker,
     Withdrawer,
 }
 
+#[repr(C)]
 #[cfg_attr(feature = "codama", derive(CodamaType))]
 #[derive(Default, Debug, PartialEq, Eq, Clone, Copy)]
 #[cfg_attr(feature = "frozen-abi", derive(solana_frozen_abi_macro::AbiExample))]
@@ -299,6 +302,7 @@ pub enum StakeAuthorize {
     feature = "serde",
     derive(serde_derive::Deserialize, serde_derive::Serialize)
 )]
+#[cfg_attr(feature = "wincode", derive(wincode::SchemaRead, wincode::SchemaWrite))]
 pub struct Lockup {
     /// `UnixTimestamp` at which this stake will allow withdrawal, unless the
     ///   transaction is signed by the custodian
@@ -319,6 +323,7 @@ impl Lockup {
     }
 }
 
+#[repr(C)]
 #[cfg_attr(feature = "codama", derive(CodamaType))]
 #[derive(Default, Debug, PartialEq, Eq, Clone, Copy)]
 #[cfg_attr(feature = "frozen-abi", derive(solana_frozen_abi_macro::AbiExample))]
@@ -331,6 +336,7 @@ impl Lockup {
     feature = "serde",
     derive(serde_derive::Deserialize, serde_derive::Serialize)
 )]
+#[cfg_attr(feature = "wincode", derive(wincode::SchemaRead, wincode::SchemaWrite))]
 pub struct Authorized {
     pub staker: Pubkey,
     pub withdrawer: Pubkey,
@@ -402,6 +408,7 @@ impl Authorized {
     }
 }
 
+#[repr(C)]
 #[cfg_attr(feature = "codama", derive(CodamaType))]
 #[derive(Default, Debug, PartialEq, Eq, Clone, Copy)]
 #[cfg_attr(feature = "frozen-abi", derive(solana_frozen_abi_macro::AbiExample))]
@@ -414,6 +421,7 @@ impl Authorized {
     feature = "serde",
     derive(serde_derive::Deserialize, serde_derive::Serialize)
 )]
+#[cfg_attr(feature = "wincode", derive(wincode::SchemaRead, wincode::SchemaWrite))]
 pub struct Meta {
     #[deprecated(
         since = "3.0.1",
@@ -462,6 +470,7 @@ impl Meta {
     }
 }
 
+#[repr(C)]
 #[cfg_attr(feature = "codama", derive(CodamaType))]
 #[derive(Debug, PartialEq, Clone, Copy)]
 #[cfg_attr(feature = "frozen-abi", derive(solana_frozen_abi_macro::AbiExample))]
@@ -474,6 +483,7 @@ impl Meta {
     feature = "serde",
     derive(serde_derive::Deserialize, serde_derive::Serialize)
 )]
+#[cfg_attr(feature = "wincode", derive(wincode::SchemaRead, wincode::SchemaWrite))]
 pub struct Delegation {
     /// to whom the stake is delegated
     pub voter_pubkey: Pubkey,
@@ -702,6 +712,7 @@ impl Delegation {
     }
 }
 
+#[repr(C)]
 #[cfg_attr(feature = "codama", derive(CodamaType))]
 #[derive(Debug, Default, PartialEq, Clone, Copy)]
 #[cfg_attr(feature = "frozen-abi", derive(solana_frozen_abi_macro::AbiExample))]
@@ -714,6 +725,7 @@ impl Delegation {
     feature = "serde",
     derive(serde_derive::Deserialize, serde_derive::Serialize)
 )]
+#[cfg_attr(feature = "wincode", derive(wincode::SchemaRead, wincode::SchemaWrite))]
 pub struct Stake {
     pub delegation: Delegation,
     /// credits observed is credits from vote account state when delegated or redeemed