{"record":{"id":"395eb8c9208272ba","repo":"nautechsystems/nautilus_trader","slug":"failed-to-mint-lighter-auth-token-e","errorCode":null,"errorMessage":"failed to mint Lighter auth token: {e}","messagePattern":"failed to mint Lighter auth token: (.+?)","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"crates/adapters/lighter/src/signing/auth_token.rs","lineNumber":136,"sourceCode":") -> anyhow::Result<SecretString> {\n    let now = SystemTime::now()\n        .duration_since(UNIX_EPOCH)\n        .map_err(|_| anyhow::anyhow!(\"system clock is before UNIX epoch\"))?\n        .as_secs();\n    let now_i64 = i64::try_from(now)\n        .map_err(|_| anyhow::anyhow!(\"system clock overflowed when converting to i64\"))?;\n    let deadline = now_i64\n        .checked_add(DEFAULT_AUTH_TOKEN_TTL_SECS)\n        .ok_or_else(|| anyhow::anyhow!(\"deadline computation overflowed\"))?;\n    let sk = credential.private_key()?;\n    build_auth_token(\n        deadline,\n        credential.account_index(),\n        credential.api_key_index(),\n        &sk,\n        fresh_k(),\n    )\n    .map_err(|e| anyhow::anyhow!(\"failed to mint Lighter auth token: {e}\"))\n}\n\n/// Draws a fresh canonical [`Scalar`] from the thread-local CSPRNG suitable\n/// for the per-signature `k` nonce.\n///\n/// The Schnorr binding requires `k` to be drawn from a cryptographic RNG and\n/// used at most once per signature; see [`PrivateKey::sign`] for the full\n/// contract. The 40-byte draw is reduced modulo the curve order, so the\n/// returned scalar is always canonical.\n#[must_use]\npub fn fresh_k() -> Scalar {\n    let mut bytes = [0u8; SCALAR_BYTES];\n    rand::rng().fill(&mut bytes[..]);\n    Scalar::from_le_bytes_reduce(bytes)\n}\n\n/// Build a Lighter auth token using the system clock as the `now` reference.\n///","sourceCodeStart":118,"sourceCodeEnd":154,"githubUrl":"https://github.com/nautechsystems/nautilus_trader/blob/18893faf8b356be3320add8de2f861b0b647cf06/crates/adapters/lighter/src/signing/auth_token.rs#L118-L154","documentation":"This wraps any failure returned by the underlying build_auth_token signing routine (private key handling, Schnorr signing, serialization) into an anyhow error prefixed with 'failed to mint Lighter auth token'. It is a wrapper, so the root cause is in the inner error's Display output.","triggerScenarios":"Any of the token-minting call sites (apply_referral_attribution, is_maker_only_api_key, spawn_ws_consumer, generate_order_status_reports, paginate_fill_reports) when the private key is invalid/unreadable or the signing/serialization step inside build_auth_token fails.","commonSituations":"Corrupted or malformed API private key (wrong format, whitespace, non-hex), key file permissions, key type not supported by the signer, upstream signing crate returning an error after a version bump.","solutions":["Read the inner `{e}` message in the full error chain to find the real cause","Verify the credential's private key is a valid, correctly formatted key for the Lighter signer","Re-export or regenerate the API key and update credentials","Check for recent dependency upgrades that changed the signing API"],"exampleFix":"// before: opaque wrapper only\n.map_err(|e| anyhow::anyhow!(\"failed to mint Lighter auth token: {e}\"))\n// after: caller-side, surface the chain\nif let Err(e) = build_auth_token_for(&credential).await {\n    tracing::error!(\"auth token mint failed: {e:#}\");\n    return Err(e);\n}","handlingStrategy":"try-catch","validationCode":"if credential.private_key().is_err() {\n    return Err(anyhow!(\"credential private key unavailable/invalid; fix before minting\"));\n}","typeGuard":"fn credential_ready(c: &Credential) -> bool { c.private_key().is_ok() }","tryCatchPattern":"match mint_auth_token(&credential) {\n    Ok(t) => t,\n    Err(e) => {\n        tracing::error!(\"token mint failed: {e:#}\"); // {:#} prints the root cause\n        return Err(e);\n    }\n}","preventionTips":["Validate key format (hex/length) when loading credentials at startup","Log the full anyhow chain ({e:#}) not just the wrapper message","Rotate and re-test API keys after any signing-dependency upgrade"],"tags":["rust","auth","signing","credentials"],"backgroundTag":"authentication-required","analyzedSha":"18893faf8b356be3320add8de2f861b0b647cf06","analyzedAt":"2026-09-08T20:49:34.690Z","contentChangedAt":"2026-09-08T20:49:34.690Z","schemaVersion":2},"datasetVersion":"2026-09-14T05:17:10.506Z"}