export declare class AiFinPayError extends Error {
    constructor(message: string);
}
export declare class X402Error extends AiFinPayError {
}
export declare class FundingTimeoutError extends AiFinPayError {
}
export declare class SeatNotFoundError extends AiFinPayError {
}
/** The 402 response did not match any known facilitator flavor. */
export declare class UnsupportedFacilitatorError extends X402Error {
}
/** Required payment exceeds the caller's maxAmountUsd budget. */
export declare class PaymentTooExpensiveError extends X402Error {
}
/** Detected a known facilitator we can't pay yet (e.g. EVM not wired). */
export declare class FacilitatorNotImplementedError extends X402Error {
}
/**
 * Shape safe to cross a process boundary (MCP tool result, logs, chat).
 * Only the error name, message, and explicitly allowlisted public fields —
 * never seeds, secret keys, keystore JSON, bearer JWTs, or signatures.
 */
export interface SafeErrorShape {
    name: string;
    message: string;
    code?: string;
    kind?: string;
    stage?: string;
    txHash?: string;
    txRef?: string;
    quoteId?: string;
}
/** Serialize any thrown value to SafeErrorShape. Non-Errors become UnknownError. */
export declare function toSafeError(err: unknown): SafeErrorShape;
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