nautechsystems/nautilus_trader · error

Provider failure domains must contain nonempty opaque IDs

Error message

Provider failure domains must contain nonempty opaque IDs

What it means

This error is raised during provider identity validation in the blockchain RPC verification subsystem. A provider supplies a list of failure-domain identifiers used to model geographic/infrastructure independence for decentralized verification quorums; the library requires the list to be nonempty and every ID to be a nonempty, non-whitespace opaque string. If any of these conditions fails, identity registration is rejected with this anyhow::ensure! error.

Source

Thrown at crates/adapters/blockchain/src/rpc/verification.rs:1442

                .call_edges
                .iter()
                .any(|edge| edge.purpose == purpose),
            "Deployment manifest is missing a swap call graph"
        );
    }
    Ok(())
}

fn validate_identity(identity: &BlockchainProviderIdentity) -> anyhow::Result<()> {
    anyhow::ensure!(
        !identity.provider_id.trim().is_empty(),
        "Provider ID is required"
    );
    anyhow::ensure!(
        !identity.operator_id.trim().is_empty(),
        "Provider operator ID is required"
    );
    anyhow::ensure!(
        !identity.failure_domain_ids.is_empty()
            && identity
                .failure_domain_ids
                .iter()
                .all(|domain| !domain.trim().is_empty()),
        "Provider failure domains must contain nonempty opaque IDs"
    );
    ensure_distinct(
        identity.failure_domain_ids.iter().map(String::as_str),
        "failure-domain IDs within one provider",
    )
}

fn ensure_distinct<'a>(
    values: impl IntoIterator<Item = &'a str>,
    description: &str,
) -> anyhow::Result<()> {
    let values = values.into_iter().collect::<Vec<_>>();

View on GitHub (pinned to 18893faf8b)

Solutions

1. Populate identity.failure_domain_ids with at least one nonempty domain ID before validation
2. Trim each ID and filter out blank entries when building the identity from config
3. Validate the provider config at load time so empty/blank domain lists fail early with a clearer message
4. Ensure IDs are pre-trimmed so trim() equals the value and no whitespace-only entries slip through

Example fix

// before
let identity = ProviderIdentity {
    failure_domain_ids: vec![],
    ..identity
};
// after
let identity = ProviderIdentity {
    failure_domain_ids: vec!["us-east-1".to_string(), "eu-central-1".to_string()],
    ..identity
};

let domains: Vec<&str> = identity.failure_domain_ids.iter().map(|s| s.as_str()).collect();
if domains.is_empty() || domains.iter().any(|d| d.trim().is_empty()) {
    return Err("provider failure_domain_ids must be a nonempty list of nonempty, trimmed IDs");
}

fn has_valid_failure_domains(identity: &ProviderIdentity) -> bool {
    !identity.failure_domain_ids.is_empty()
        && identity.failure_domain_ids.iter().all(|d| !d.trim().is_empty())
}

When it happens

Trigger: Calling the provider-identity validation path (verification.rs:~1442) with an identity whose failure_domain_ids vec is empty, or whose list contains an empty string, all-whitespace string, or an untrimmed value like " us-east ".

Common situations: Config files for RPC providers missing the failure_domains key (deserialized as empty vec); YAML/JSON entries with blank strings ('""' or ' '); hand-written provider config where the operator assumed optional domains; trimming logic upstream that strips values but not list entries.

Understand the failure class

Background: "must not be empty", "cannot be empty" — required-field validation errors across open-source libraries — this error's family across 41 libraries.

Related errors

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• Quote spend limit for {token_in} -> {token_out} is denominat
• Independent Blockchain execution verification is required
• Verification chain anchor ID does not match the configured c
• Verification chain anchor name does not match the configured

AI-assisted analysis of nautechsystems/nautilus_trader@18893faf8b (2026-09-08). Data as JSON: /api/errors/9403a29f9b94b07f. Report an issue: GitHub.