Hmbown/CodeWhale · error · anyhow::Error

Invalid cost_currency

Error message

Invalid cost_currency '{other}': expected usd, cny, rmb, or yuan

What it means

Thrown by CostCurrencyValue::from_setting when the cost_currency setting, after trim and ASCII lowercasing, is not one of usd, cny, rmb, or yuan. cny/rmb/yuan all map to Cny; only these four spellings are accepted and there is no empty-string default, so a blank value also fails.

Solutions

Set cost_currency to "usd", "cny", "rmb", or "yuan" (case-insensitive)
If you need another currency, request it upstream; do not keep an unsupported value in config
Remove typos or trailing punctuation from the value

Example fix

# before
cost_currency = "eur"

# after
cost_currency = "usd"

Defensive patterns

Strategy: validation

Validate before calling

fn normalize_cost_currency(value: &str) -> Option<&'static str> {
    match value.trim().to_ascii_lowercase().as_str() {
        "usd" => Some("usd"),
        "cny" | "rmb" | "yuan" => Some("cny"),
        _ => None,
    }
}

// before saving:
let Some(currency) = normalize_cost_currency(input) else {
    return Err(anyhow::anyhow!("cost_currency must be usd, cny, rmb, or yuan"));
};

Prevention

Use a closed dropdown of the four accepted spellings instead of free-form input
Normalize at write time (trim + lowercase) so reads never see "USD " variants
Treat empty as invalid: pick an explicit default currency in the UI

When it happens

Trigger: Setting cost_currency to anything else: "eur", "jpy", "us", or "" (empty). Triggered wherever from_setting parses the setting during config load.

Common situations: Hand-editing config with an ISO code that was never supported; clearing the value instead of using "usd"; scripts writing uppercase with different spacing ("USD " is fine after trim, but "US D" is not).

Related errors

AI-assisted analysis of Hmbown/CodeWhale@0c42157ee5 (2026-08-20). Data as JSON: /api/errors/da293e71c57d50c8. Report an issue: GitHub.

Appendix: source

Thrown at crates/tui/src/config_ui.rs:1303

    }

    #[allow(dead_code)]
    fn description(self) -> &'static str {
        match self {
            Self::Agent => "Do the work in this session.",
            Self::Plan => "Design first; implement after you approve.",
            Self::Operate => "Dispatch workers; keep the parent free for steers.",
        }
    }
}

impl CostCurrencyValue {
    fn from_setting(value: &str) -> Result<Self> {
        match value.trim().to_ascii_lowercase().as_str() {
            "usd" => Ok(Self::Usd),
            "cny" | "rmb" | "yuan" => Ok(Self::Cny),
            other => {
                anyhow::bail!("Invalid cost_currency '{other}': expected usd, cny, rmb, or yuan")
            }
        }
    }

    fn as_setting(self) -> &'static str {
        match self {
            Self::Usd => "usd",
            Self::Cny => "cny",
        }
    }
}

impl From<ApprovalMode> for ApprovalModeValue {
    fn from(value: ApprovalMode) -> Self {
        match value {
            ApprovalMode::Auto => Self::Auto,
            ApprovalMode::Bypass => Self::Bypass,
            ApprovalMode::Suggest => Self::Suggest,

View on GitHub (pinned to 0c42157ee5)