Function string_field

atomic-canonical/src/delegation.rs:628–633

(obj: &Map<String, Value>, key: &str)

}

fn string_field(obj: &Map<String, Value>, key: &str) -> Result<String> {
    obj.get(key)
        .and_then(Value::as_str)
        .map(str::to_string)
        .ok_or_else(|| CanonicalError::Proof(format!("document is missing '{key}'")))
}

fn timestamp_field(obj: &Map<String, Value>, key: &str) -> Result<DateTime<Utc>> {
    let raw = string_field(obj, key)?;