export type CanonErrorCode = "CANON_VIOLATION" | "CONTRACT_MISMATCH" | "POLICY_DENIED" | "UNAUTHENTICATED" | "UNAUTHORIZED" | "NOT_FOUND" | "CONFLICT" | "VALIDATION_FAILED" | "INTERNAL";
export declare class CanonError extends Error {
    readonly code: CanonErrorCode;
    readonly details?: unknown;
    constructor(code: CanonErrorCode, message: string, details?: unknown);
    toJSON(): {
        code: CanonErrorCode;
        message: string;
        details: unknown;
    };
}
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