import { type ApplyOverlayOptions } from './merger';
import { type OverlayLookup, OverlayRegistry } from './registry';
import type { SignedOverlaySpec } from './spec';
import type { OverlayAuditEvent, OverlayRenderable } from './types';
export interface OverlayEngineOptions {
    registry: OverlayRegistry;
    audit?: (event: OverlayAuditEvent) => void;
}
export interface OverlayApplyParams<T extends OverlayRenderable> extends OverlayLookup {
    target: T;
    overlays?: SignedOverlaySpec[];
    strict?: ApplyOverlayOptions['strict'];
}
export interface OverlayRuntimeResult<T extends OverlayRenderable> {
    target: T;
    overlaysApplied: SignedOverlaySpec[];
}
export declare class OverlayEngine {
    private readonly registry;
    private readonly audit?;
    constructor(options: OverlayEngineOptions);
    apply<T extends OverlayRenderable>(params: OverlayApplyParams<T>): OverlayRuntimeResult<T>;
}