nautechsystems/nautilus_trader · error

Payload key environment name is empty

Error message

Payload key environment name is empty

What it means

PayloadKeySet::load found a configured payload key environment name that is empty; an empty string cannot name a valid environment for resolving payload sealing keys, so key loading aborts.

Source

Thrown at crates/adapters/blockchain/src/execution/sealing.rs:92

            .field("deployment_id", &self.deployment_id)
            .finish()
    }
}

impl PayloadKeySet {
    pub(crate) fn load(
        active_env: Option<&str>,
        retired_envs: &[String],
        deployment_id: Option<&str>,
    ) -> anyhow::Result<Option<Self>> {
        let Some(active_env) = active_env else {
            anyhow::ensure!(
                retired_envs.is_empty() && deployment_id.is_none(),
                "Payload deployment or retired keys require an active payload sealing key"
            );
            return Ok(None);
        };
        anyhow::ensure!(
            !active_env.trim().is_empty(),
            "Payload key environment name is empty"
        );
        let deployment_id = deployment_id
            .map(str::trim)
            .filter(|value| !value.is_empty())
            .ok_or_else(|| {
                anyhow::anyhow!(
                    "Payload deployment ID is required when payload sealing is configured"
                )
            })?;

        let active = load_key(active_env)?;
        let mut retired = Vec::with_capacity(retired_envs.len());
        for env in retired_envs {
            anyhow::ensure!(
                !env.trim().is_empty(),
                "Retired payload key environment name is empty"

View on GitHub (pinned to 18893faf8b)

Solutions

1. Set the active payload key env var name to a real identifier, e.g. PAYLOAD_SEALING_KEY.
2. Fix templating/env substitution so the value is not empty at load time.
3. If sealing should be off, omit the field entirely (None) rather than passing an empty string.

Example fix

// before
payload_sealing_key_env = ""

// after
payload_sealing_key_env = "PAYLOAD_SEALING_KEY"

if let Some(name) = active_env {
    assert!(!name.trim().is_empty(), "payload key env name must be non-empty");
}

fn non_empty(s: &str) -> bool { !s.trim().is_empty() }

match PayloadSealingKeys::load(active, &retired, dep) {
    Err(e) if e.to_string().contains("environment name is empty") => eprintln!("set a concrete env var name for the payload sealing key"),
    other => other,
}

When it happens

Trigger: Calling load with active_env = Some("") or Some(" ") — the config field for the active payload key env var is present but empty.

Common situations: Config file has `payload_sealing_key_env = ""` after a value was accidentally cleared, an env-substituted value resolving to empty (e.g. `${PAYLOAD_KEY_ENV}` unset in templating), or a whitespace typo.

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

• Payload deployment or retired keys require an active payload
• Payload deployment ID is required when payload sealing is co
• max_fee_per_contract is required
• max_fee_per_contract must be greater than zero
• {label} must not be empty

AI-assisted analysis of nautechsystems/nautilus_trader@18893faf8b (2026-09-08). Data as JSON: /api/errors/4581bcd6d212162e. Report an issue: GitHub.