move ProofVerificationError to elgamal-program module

zk-sdk/src/elgamal_program/errors.rs

@@ -0,0 +1,7 @@
+use thiserror::Error;
+
+#[derive(Error, Clone, Debug, Eq, PartialEq)]
+pub enum ProofVerificationError {
+    #[error("Invalid proof context")]
+    ProofContext,
+}

zk-sdk/src/elgamal_program/mod.rs

@@ -7,6 +7,7 @@
 //!
 //! [`ZK ElGamal proof`]: https://docs.solanalabs.com/runtime/zk-token-proof
 
+pub mod errors;
 pub mod instruction;
 pub mod proof_data;
 pub mod state;

zk-sdk/src/elgamal_program/proof_data/errors.rs

@@ -1,7 +1,7 @@
 use thiserror::Error;
 
 #[derive(Error, Clone, Debug, Eq, PartialEq)]
-pub enum ElGamalProofProgramError {
+pub enum ProofDataError {
     #[error("decryption error")]
     Decryption,
     #[error("missing ciphertext")]

zk-sdk/src/elgamal_program/proof_data/mod.rs

@@ -1,5 +1,5 @@
 use {
-    crate::errors::ProofVerificationError,
+    crate::elgamal_program::errors::ProofVerificationError,
     bytemuck::Pod,
     num_derive::{FromPrimitive, ToPrimitive},
 };

zk-sdk/src/elgamal_program/proof_data/pod.rs

@@ -1,5 +1,5 @@
 use {
-    crate::elgamal_program::proof_data::{errors::ElGamalProofProgramError, ProofType},
+    crate::elgamal_program::proof_data::{errors::ProofDataError, ProofType},
     bytemuck::{Pod, Zeroable},
     num_traits::{FromPrimitive, ToPrimitive},
 };
@@ -13,7 +13,7 @@ impl From<ProofType> for PodProofType {
     }
 }
 impl TryFrom<PodProofType> for ProofType {
-    type Error = ElGamalProofProgramError;
+    type Error = ProofDataError;
 
     fn try_from(pod: PodProofType) -> Result<Self, Self::Error> {
         FromPrimitive::from_u8(pod.0).ok_or(Self::Error::InvalidProofType)

zk-sdk/src/errors.rs

@@ -36,9 +36,3 @@ pub enum TranscriptError {
     #[error("point is the identity")]
     ValidationError,
 }
-
-#[derive(Error, Clone, Debug, Eq, PartialEq)]
-pub enum ProofVerificationError {
-    #[error("Invalid proof context")]
-    ProofContext,
-}