Trait CommitmentAccessor

pub trait CommitmentAccessor<C: Commitment>: MetadataAccessor {
    // Required method
    fn get_commitment(&self, column: ColumnRef) -> C;
}

Access commitments of database columns.

Verifier uses this information to process a query.

In pseudo-code, here is a sketch of how CommitmentAccessor fits in with the verification workflow:

verify(proof, query, commitment_database) {
    if(!validate_query(query, commitment_database)) {
        // if the query references columns that don't exist
        // we should error here before going any further
        return invalid-query()
    }
    commitment_database.reader_lock()
    // we can't be updating commitments while verifying
    accessor <- make-commitment-accessor(commitment_database)
    verify_result <- verify-valid-query(proof, query, accessor)
    commitment_database.reader_unlock()
    return verify_result
}

Note: we assume that the query has already been validated so that we will only be accessing information about columns that exist in the database.

Required Methods

fn get_commitment(&self, column: ColumnRef) -> C

Return the full table column commitment

Implementors

impl<C: Commitment> CommitmentAccessor<C> for QueryCommitments<C>

Panics

Panics if the commitment for the table or column cannot be found.

impl<CP: CommitmentEvaluationProof> CommitmentAccessor<<CP as CommitmentEvaluationProof>::Commitment> for OwnedTableTestAccessor<'_, CP>

Panics

Will panic if the column.table_ref() is not found in self.tables, or if the column.column_id() is not found in the inner table for that reference,indicating that an invalid column reference was provided.

impl<CP: CommitmentEvaluationProof> CommitmentAccessor<<CP as CommitmentEvaluationProof>::Commitment> for TableTestAccessor<'_, CP>

Panics

Will panic if the column.table_ref() is not found in self.tables, or if the column.column_id() is not found in the inner table for that reference,indicating that an invalid column reference was provided.