Adapt to changes to native program entrypoint

zk-token-sdk/src/encryption/auth_encryption.rs

@@ -97,7 +97,7 @@ pub type Nonce = [u8; 12];
 pub type Ciphertext = [u8; 24];
 
 /// Authenticated encryption nonce and ciphertext
-#[derive(Debug)]
+#[derive(Debug, Default)]
 pub struct AeCiphertext {
     pub nonce: Nonce,
     pub ciphertext: Ciphertext,
@@ -129,15 +129,6 @@ impl AeCiphertext {
     }
 }
 
-impl Default for AeCiphertext {
-    fn default() -> Self {
-        AeCiphertext {
-            nonce: [0_u8; 12],
-            ciphertext: [0_u8; 24],
-        }
-    }
-}
-
 #[cfg(test)]
 mod tests {
     use {

zk-token-sdk/src/encryption/pedersen.rs

@@ -70,7 +70,7 @@ impl Pedersen {
     }
 }
 
-#[derive(Serialize, Deserialize, Clone, Debug, Zeroize)]
+#[derive(Serialize, Deserialize, Default, Clone, Debug, Zeroize)]
 #[zeroize(drop)]
 pub struct PedersenOpening(pub(crate) Scalar);
 impl PedersenOpening {
@@ -107,12 +107,6 @@ impl ConstantTimeEq for PedersenOpening {
     }
 }
 
-impl Default for PedersenOpening {
-    fn default() -> Self {
-        PedersenOpening(Scalar::default())
-    }
-}
-
 impl<'a, 'b> Add<&'b PedersenOpening> for &'a PedersenOpening {
     type Output = PedersenOpening;
 

zk-token-sdk/src/zk_token_proof_instruction.rs

@@ -4,7 +4,7 @@ use {
     bytemuck::{bytes_of, Pod},
     num_derive::{FromPrimitive, ToPrimitive},
     num_traits::{FromPrimitive, ToPrimitive},
-    solana_program::{instruction::Instruction, pubkey::Pubkey},
+    solana_program::instruction::Instruction,
 };
 
 #[derive(Clone, Copy, Debug, FromPrimitive, ToPrimitive, PartialEq)]
@@ -52,12 +52,8 @@ impl ProofInstruction {
         }
     }
 
-    pub fn decode_type(program_id: &Pubkey, input: &[u8]) -> Option<Self> {
-        if *program_id != crate::zk_token_proof_program::id() || input.is_empty() {
-            None
-        } else {
-            FromPrimitive::from_u8(input[0])
-        }
+    pub fn decode_type(input: &[u8]) -> Option<Self> {
+        FromPrimitive::from_u8(input[0])
     }
 
     pub fn decode_data<T: Pod>(input: &[u8]) -> Option<&T> {