Struct OprfEntrypoint 

pub struct OprfEntrypoint<'a> { /* private fields */ }

The main entry point to execute OPRF computations using the OPRF nodes.

Implementations

impl<'a> OprfEntrypoint<'a>

pub fn new( services: &'a [String], threshold: usize, query_material: &'a CircomGroth16Material, authenticator_input: &'a AuthenticatorProofInput, connector: &'a Connector, ) -> Self

pub async fn gen_credential_blinding_factor<R: CryptoRng + RngCore>( &self, rng: &mut R, issuer_schema_id: u64, ) -> Result<(FieldElement, ShareEpoch), ProofError>

Generates a blinding factor for a Credential’s sub through the OPRF nodes.

This method will handle the signature from the Authenticator authorizing the request for the OPRF nodes.

Arguments

• issuer_schema_id: The schema ID of the credential issuer for which the blinding factor is being generated.

Errors

Returns ProofError in the following cases:

• PublicKeyNotFound - the public key for the given authenticator private key is not found in the key_set.
• InvalidDLogProof – the DLog equality proof could not be verified.
• Other errors may propagate from network requests, proof generation, or Groth16 verification.

pub async fn gen_nullifier<R: CryptoRng + RngCore>( &self, rng: &mut R, proof_request: &ProofRequest, ) -> Result<FullOprfOutput, ProofError>

Generates a nullifier through the provided OPRF nodes for a specific proof request.

Note on Session Proofs

A randomized action is required on Session Proofs to ensure the output nullifier from the Uniqueness Proof circuit is unique (otherwise the one-time use property of nullifiers would fail). Please see the “Future” section in the SessionNullifier documentation for more details on how this is expected to be deprecated with a future update.

Errors

Returns ProofError in the following cases:

• PublicKeyNotFound - the public key for the given authenticator private key is not found in the key_set.
• InvalidDLogProof – the DLog equality proof could not be verified.
• Other errors may propagate from network requests, proof generation, or Groth16 verification.