T402 API Reference - v2.8.0
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    Type Alias PaymentPhase

    PaymentPhase:
        | "signing"
        | "submission"
        | "verification"
        | "settlement"
        | "unknown"

    T402PaymentError - Structured error class for the T402 payment protocol.

    Wraps upstream errors with payment-specific context: phase, retryability, and optional HTTP status code.