internal static extern int bbs_verify_proof_context_add_message_string(ulong handle, uint index, string message, out ExternError err);
internal static extern ulong bbs_verify_proof_context_init(out ExternError err);
internal static extern int bbs_verify_proof_context_finish(ulong handle, out ExternError err);
internal static extern int bbs_unblind_signature(ByteBuffer blind_signature, ByteBuffer blinding_factor, out ByteBuffer unblind_signature, out ExternError err);
internal static extern int bbs_verify_context_set_signature(ulong handle, ByteBuffer signature, out ExternError err);
internal static extern int bbs_verify_proof_context_set_nonce_string(ulong handle, string nonce, out ExternError err);
internal static extern ulong bbs_verify_blind_commitment_context_init(out ExternError err);
internal static extern ulong bbs_sign_context_init(out ExternError err);
internal static extern int bbs_sign_context_finish(ulong handle, out ByteBuffer signature, out ExternError err);
internal static extern int bbs_create_proof_context_set_signature(ulong handle, ByteBuffer signature, out ExternError err);
internal static extern int bbs_create_proof_context_set_nonce_bytes(ulong handle, ByteBuffer nonce, out ExternError err);
internal static extern int bbs_create_proof_context_add_proof_message_prehashed(ulong handle, ByteBuffer message, ProofMessageType xtype, ByteBuffer blinding_factor, out ExternError err);
internal static extern int bbs_create_proof_context_finish(ulong handle, out ByteBuffer proof, out ExternError err);
internal static extern ulong bbs_create_proof_context_init(out ExternError err);
internal static extern int bbs_verify_proof_context_add_message_prehashed(ulong handle, ByteBuffer message, out ExternError err);
internal static extern int bbs_sign_context_add_message_string(ulong handle, string message, out ExternError err);
internal static extern int bbs_verify_proof_context_set_public_key(ulong handle, ByteBuffer public_key, out ExternError err);
internal static extern int bbs_sign_context_set_secret_key(ulong handle, ByteBuffer secret_key, out ExternError err);
internal static extern int bbs_verify_proof_context_set_nonce_prehashed(ulong handle, ByteBuffer nonce, out ExternError err);
internal static extern int bbs_verify_context_add_message_bytes(ulong handle, ByteBuffer message, out ExternError err);
internal static extern int bbs_verify_blind_commitment_context_add_blinded(ulong handle, uint index, out ExternError err);
internal static extern int bbs_blind_sign_context_set_commitment(ulong handle, ByteBuffer commitment, out ExternError err);
