/** Why a decision failed, apart from the rest of the contract, so every part of it can raise one. */
/** Why a decision failed. */
export type DecisionErrorCode = 'DECISION_NO_PROVIDER' | 'DECISION_UNSUPPORTED' | 'DECISION_INVALID' | 'DECISION_FAILED';
/** Raised for a decision no provider can serve, a question that is malformed, or a provider's failure. */
export declare class DecisionError extends Error {
    /**
     * A stable code: `DECISION_NO_PROVIDER`, `DECISION_UNSUPPORTED` (a provider cannot take the
     * question), `DECISION_INVALID` (the request, or an answer, is malformed), or `DECISION_FAILED`.
     */
    readonly code: DecisionErrorCode;
    /** Whether asking again, or another provider, may help: a timeout or an overloaded service may. */
    readonly retryable: boolean;
    /** The HTTP status a provider answered with, when it did. */
    readonly status?: number | undefined;
    constructor(message: string, 
    /**
     * A stable code: `DECISION_NO_PROVIDER`, `DECISION_UNSUPPORTED` (a provider cannot take the
     * question), `DECISION_INVALID` (the request, or an answer, is malformed), or `DECISION_FAILED`.
     */
    code: DecisionErrorCode, 
    /** Whether asking again, or another provider, may help: a timeout or an overloaded service may. */
    retryable?: boolean, 
    /** The HTTP status a provider answered with, when it did. */
    status?: number | undefined);
}