anza-xyz · kevinheavey · Oct 8, 2025 · Oct 8, 2025 · Oct 9, 2025 · Oct 9, 2025
diff --git a/address/src/lib.rs b/address/src/lib.rs
@@ -236,10 +236,11 @@ impl Address {
     #[cfg(feature = "sha2")]
     pub fn create_with_seed(
         base: &Address,
-        seed: &str,
+        seed: &(impl AsRef<[u8]> + ?Sized),
         owner: &Address,
     ) -> Result<Address, AddressError> {
-        if seed.len() > MAX_SEED_LEN {
+        let seed_bytes: &[u8] = seed.as_ref();
+        if seed_bytes.len() > MAX_SEED_LEN {
             return Err(AddressError::MaxSeedLengthExceeded);
         }
 
@@ -250,7 +251,7 @@ impl Address {
                 return Err(AddressError::IllegalOwner);
             }
         }
-        let hash = solana_sha256_hasher::hashv(&[base.as_ref(), seed.as_ref(), owner]);
+        let hash = solana_sha256_hasher::hashv(&[base.as_ref(), seed_bytes, owner]);
         Ok(Address::from(hash.to_bytes()))
     }
 

diff --git a/sdk-wasm-js/src/address.rs b/sdk-wasm-js/src/address.rs
@@ -121,7 +121,7 @@ impl Address {
     }
 
     /// Derive an Address from anothern Address, string seed, and a program id
-    pub fn createWithSeed(base: &Self, seed: &str, owner: &Self) -> Result<Self, JsValue> {
+    pub fn createWithSeed(base: &Self, seed: &[u8], owner: &Self) -> Result<Self, JsValue> {
         solana_address::Address::create_with_seed(&base.inner, seed, &owner.inner)
             .map(Into::into)
             .map_err(display_to_jsvalue)

diff --git a/sdk-wasm-js/tests/address.mjs b/sdk-wasm-js/tests/address.mjs
@@ -101,9 +101,10 @@ describe("Address", function () {
 
   it("createWithSeed", async () => {
     const defaultPublicKey = new Address("11111111111111111111111111111111");
+    const bytes = Uint8Array.from("limber chicken: 4/45", c => c.charCodeAt(0));
     const derivedKey = Address.createWithSeed(
       defaultPublicKey,
-      "limber chicken: 4/45",
+      bytes,
       defaultPublicKey
     );
 

diff --git a/system-interface/src/instruction.rs b/system-interface/src/instruction.rs
@@ -75,7 +75,7 @@ const NONCE_STATE_SIZE: usize = 80;
 /// An instruction to the system program.
 #[cfg_attr(
     feature = "frozen-abi",
-    solana_frozen_abi_macro::frozen_abi(digest = "CBvp4X1gf36kwDqnprAa6MpKckptiAHfXSxFRHFnNRVw"),
+    solana_frozen_abi_macro::frozen_abi(digest = "7Hc7pX4JYnEsBEyixxKP76aDSq3668bLUc1V7L9Vqm68"),
     derive(
         solana_frozen_abi_macro::AbiExample,
         solana_frozen_abi_macro::AbiEnumVisitor
@@ -132,7 +132,7 @@ pub enum SystemInstruction {
         base: Address,
 
         /// String of ASCII chars, no longer than `Address::MAX_SEED_LEN`
-        seed: String,
+        seed: Vec<u8>,
 
         /// Number of lamports to transfer to the new account
         lamports: u64,
@@ -208,7 +208,7 @@ pub enum SystemInstruction {
         base: Address,
 
         /// String of ASCII chars, no longer than `Address::MAX_SEED_LEN`
-        seed: String,
+        seed: Vec<u8>,
 
         /// Number of bytes of memory to allocate
         space: u64,
@@ -227,7 +227,7 @@ pub enum SystemInstruction {
         base: Address,
 
         /// String of ASCII chars, no longer than `Address::MAX_SEED_LEN`
-        seed: String,
+        seed: Vec<u8>,
 
         /// Owner program account
         owner: Address,
@@ -244,7 +244,7 @@ pub enum SystemInstruction {
         lamports: u64,
 
         /// Seed to use to derive the funding account address
-        from_seed: String,
+        from_seed: Vec<u8>,
 
         /// Owner to use to derive the funding account address
         from_owner: Address,
@@ -479,7 +479,7 @@ pub fn create_account_with_seed(
     from_address: &Address,
     to_address: &Address, // must match create_with_seed(base, seed, owner)
     base: &Address,
-    seed: &str,
+    seed: &[u8],
     lamports: u64,
     space: u64,
     owner: &Address,
@@ -496,7 +496,7 @@ pub fn create_account_with_seed(
         ID,
         &SystemInstruction::CreateAccountWithSeed {
             base: *base,
-            seed: seed.to_string(),
+            seed: seed.to_vec(),
             lamports,
             space,
             owner: *owner,
@@ -680,7 +680,7 @@ pub fn assign(address: &Address, owner: &Address) -> Instruction {
 pub fn assign_with_seed(
     address: &Address, // must match create_with_seed(base, seed, owner)
     base: &Address,
-    seed: &str,
+    seed: &[u8],
     owner: &Address,
 ) -> Instruction {
     let account_metas = vec![
@@ -691,7 +691,7 @@ pub fn assign_with_seed(
         ID,
         &SystemInstruction::AssignWithSeed {
             base: *base,
-            seed: seed.to_string(),
+            seed: seed.to_vec(),
             owner: *owner,
         },
         account_metas,
@@ -873,7 +873,7 @@ pub fn transfer(from_address: &Address, to_address: &Address, lamports: u64) ->
 pub fn transfer_with_seed(
     from_address: &Address, // must match create_with_seed(base, seed, owner)
     from_base: &Address,
-    from_seed: String,
+    from_seed: Vec<u8>,
     from_owner: &Address,
     to_address: &Address,
     lamports: u64,
@@ -1068,7 +1068,7 @@ pub fn allocate(address: &Address, space: u64) -> Instruction {
 pub fn allocate_with_seed(
     address: &Address, // must match create_with_seed(base, seed, owner)
     base: &Address,
-    seed: &str,
+    seed: &[u8],
     space: u64,
     owner: &Address,
 ) -> Instruction {
@@ -1080,7 +1080,7 @@ pub fn allocate_with_seed(
         ID,
         &SystemInstruction::AllocateWithSeed {
             base: *base,
-            seed: seed.to_string(),
+            seed: seed.to_vec(),
             space,
             owner: *owner,
         },
@@ -1236,7 +1236,7 @@ pub fn create_nonce_account_with_seed(
     from_address: &Address,
     nonce_address: &Address,
     base: &Address,
-    seed: &str,
+    seed: &[u8],
     authority: &Address,
     lamports: u64,
 ) -> Vec<Instruction> {

diff --git a/system-wasm-js/src/lib.rs b/system-wasm-js/src/lib.rs
@@ -31,7 +31,7 @@ impl SystemInstruction {
         from: &Address,
         to: &Address,
         base: &Address,
-        seed: &str,
+        seed: &[u8],
         lamports: u64,
         space: u64,
         owner: &Address,
@@ -46,7 +46,7 @@ impl SystemInstruction {
     pub fn assignWithSeed(
         address: &Address,
         base: &Address,
-        seed: &str,
+        seed: &[u8],
         owner: &Address,
     ) -> Instruction {
         assign_with_seed(address, base, seed, owner).into()
@@ -59,7 +59,7 @@ impl SystemInstruction {
     pub fn transferWithSeed(
         from: &Address,
         from_base: &Address,
-        from_seed: String,
+        from_seed: Vec<u8>,
         from_owner: &Address,
         to: &Address,
         lamports: u64,
@@ -74,7 +74,7 @@ impl SystemInstruction {
     pub fn allocateWithSeed(
         address: &Address,
         base: &Address,
-        seed: &str,
+        seed: &[u8],
         space: u64,
         owner: &Address,
     ) -> Instruction {

diff --git a/vote-interface/src/instruction.rs b/vote-interface/src/instruction.rs
@@ -266,7 +266,7 @@ fn initialize_account(vote_pubkey: &Pubkey, vote_init: &VoteInit) -> Instruction
 
 pub struct CreateVoteAccountConfig<'a> {
     pub space: u64,
-    pub with_seed: Option<(&'a Pubkey, &'a str)>,
+    pub with_seed: Option<(&'a Pubkey, &'a [u8])>,
 }
 
 impl Default for CreateVoteAccountConfig<'_> {
@@ -356,7 +356,7 @@ pub fn authorize_with_seed(
     vote_pubkey: &Pubkey,
     current_authority_base_key: &Pubkey,
     current_authority_derived_key_owner: &Pubkey,
-    current_authority_derived_key_seed: &str,
+    current_authority_derived_key_seed: &[u8],
     new_authority: &Pubkey,
     authorization_type: VoteAuthorize,
 ) -> Instruction {
@@ -371,7 +371,7 @@ pub fn authorize_with_seed(
         &VoteInstruction::AuthorizeWithSeed(VoteAuthorizeWithSeedArgs {
             authorization_type,
             current_authority_derived_key_owner: *current_authority_derived_key_owner,
-            current_authority_derived_key_seed: current_authority_derived_key_seed.to_string(),
+            current_authority_derived_key_seed: current_authority_derived_key_seed.to_vec(),
             new_authority: *new_authority,
         }),
         account_metas,
@@ -383,7 +383,7 @@ pub fn authorize_checked_with_seed(
     vote_pubkey: &Pubkey,
     current_authority_base_key: &Pubkey,
     current_authority_derived_key_owner: &Pubkey,
-    current_authority_derived_key_seed: &str,
+    current_authority_derived_key_seed: &[u8],
     new_authority: &Pubkey,
     authorization_type: VoteAuthorize,
 ) -> Instruction {
@@ -399,7 +399,7 @@ pub fn authorize_checked_with_seed(
         &VoteInstruction::AuthorizeCheckedWithSeed(VoteAuthorizeCheckedWithSeedArgs {
             authorization_type,
             current_authority_derived_key_owner: *current_authority_derived_key_owner,
-            current_authority_derived_key_seed: current_authority_derived_key_seed.to_string(),
+            current_authority_derived_key_seed: current_authority_derived_key_seed.to_vec(),
         }),
         account_metas,
     )

diff --git a/vote-interface/src/state/vote_instruction_data.rs b/vote-interface/src/state/vote_instruction_data.rs
@@ -213,7 +213,7 @@ pub enum VoteAuthorize {
 pub struct VoteAuthorizeWithSeedArgs {
     pub authorization_type: VoteAuthorize,
     pub current_authority_derived_key_owner: Pubkey,
-    pub current_authority_derived_key_seed: String,
+    pub current_authority_derived_key_seed: Vec<u8>,
     pub new_authority: Pubkey,
 }
 
@@ -222,5 +222,5 @@ pub struct VoteAuthorizeWithSeedArgs {
 pub struct VoteAuthorizeCheckedWithSeedArgs {
     pub authorization_type: VoteAuthorize,
     pub current_authority_derived_key_owner: Pubkey,
-    pub current_authority_derived_key_seed: String,
+    pub current_authority_derived_key_seed: Vec<u8>,
 }