/**
 * MaskRule defines the currently supported types of mask rules for usage with
 * {@link mask}.
 */
export interface MaskRule {
    replace: {
        value: any;
    };
}
/**
 * Apply masking rules to an object (i.e. "mask" it)
 *
 * @param maskRules Masking rules as returned from the Compile API.
 * @param targetObject Object to apply replacements to
 * @param targetType Type of the object to apply replacements to (prefix of maskRules).
 * @returns A new object with values replaced according to the rules
 */
export declare function mask<T extends Record<string, any>>(maskRules: Record<string, Record<string, MaskRule> | MaskRule>, targetObject: T, targetType?: string): T;
/**
 * Filter an object by key prefix, removing the prefix from the keys.
 *
 * @param obj The object to filter, e.g. `{"users.id": {...}, "groups.name": {...}}`
 * @param type The prefix to filter by (e.g. "users")
 * @returns A new object with only keys that had the specified prefix, with the prefix removed
 */
export declare function project(obj: Record<string, MaskRule>, type: string): Record<string, MaskRule>;
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