solana_zk_token_sdk/zk_token_elgamal/pod/
pedersen.rs

1//! Plain Old Data type for the Pedersen commitment scheme.
2
3use {crate::RISTRETTO_POINT_LEN, std::fmt};
4#[cfg(not(target_os = "solana"))]
5use {
6    crate::{encryption::pedersen as decoded, errors::ElGamalError},
7    curve25519_dalek::ristretto::CompressedRistretto,
8};
9
10/// Byte length of a Pedersen commitment
11pub(crate) const PEDERSEN_COMMITMENT_LEN: usize = RISTRETTO_POINT_LEN;
12
13/// The `PedersenCommitment` type as a `Pod`.
14#[derive(Clone, Copy, Default, bytemuck_derive::Pod, bytemuck_derive::Zeroable, PartialEq, Eq)]
15#[repr(transparent)]
16pub struct PedersenCommitment(pub [u8; PEDERSEN_COMMITMENT_LEN]);
17
18impl fmt::Debug for PedersenCommitment {
19    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
20        write!(f, "{:?}", self.0)
21    }
22}
23
24#[cfg(not(target_os = "solana"))]
25impl From<decoded::PedersenCommitment> for PedersenCommitment {
26    fn from(decoded_commitment: decoded::PedersenCommitment) -> Self {
27        Self(decoded_commitment.to_bytes())
28    }
29}
30
31// For proof verification, interpret pod::PedersenCommitment directly as CompressedRistretto
32#[cfg(not(target_os = "solana"))]
33impl From<PedersenCommitment> for CompressedRistretto {
34    fn from(pod_commitment: PedersenCommitment) -> Self {
35        Self(pod_commitment.0)
36    }
37}
38
39#[cfg(not(target_os = "solana"))]
40impl TryFrom<PedersenCommitment> for decoded::PedersenCommitment {
41    type Error = ElGamalError;
42
43    fn try_from(pod_commitment: PedersenCommitment) -> Result<Self, Self::Error> {
44        Self::from_bytes(&pod_commitment.0).ok_or(ElGamalError::CiphertextDeserialization)
45    }
46}
solana_zk_token_sdk/zk_token_elgamal/pod/pedersen.rs

solana_zk_token_sdk/zk_token_elgamal/pod/
pedersen.rs
