CHECK(d0_blind_id_fingerprint64_public_id(ctx, fp64, &fp64size));
printf("%d\n", (int)status);
printf("%.*s\n", (int)fp64size, fp64);
CHECK(d0_blind_id_fingerprint64_public_id(ctx, fp64, &fp64size));
printf("%d\n", (int)status);
printf("%.*s\n", (int)fp64size, fp64);