Public declaration syntax from forge-rs/crates/forge-agent402/src/error.rs
Original source SHA-256: 05559050bcf2cfc6e9912adc1062412243aa0e752fbb64c652538de76db7e554
Function bodies and constant values are omitted. This is not the complete implementation.

Source line 7
#[derive(Debug, Error)]
pub enum Agent402Error {
    /// OpenAgent challenge-response authentication failed.
    #[error("authentication failed: {reason}")]
    AuthFailed { reason: String },

    /// x402 payment required but not provided or invalid.
    #[error("payment failed: {reason}")]
    PaymentFailed { reason: String },

    /// Session token expired or invalid.
    #[error("session expired")]
    SessionExpired,

    /// Network or transport error.
    #[error("network error: {0}")]
    Network(String),

    /// Configuration error.
    #[error("configuration error: {0}")]
    Config(String),

    /// Internal error.
    #[error("internal error: {0}")]
    Internal(String),
}