import { HttpMessage } from "@http4t/core/contract";
import { MessageLens, RoutingError, RoutingResult } from "../lenses";
export type StaticValueOpts<T> = {
    equality: (expected: T, actual: T) => boolean;
    failure: (value: T) => RoutingError;
};
export declare class StaticValueLens<T = unknown, TMessage extends HttpMessage = HttpMessage> implements MessageLens<TMessage, undefined> {
    private readonly value;
    private readonly lens;
    private readonly opts;
    constructor(value: T, lens: MessageLens<TMessage, T>, opts: Partial<StaticValueOpts<T>>);
    get(from: TMessage): Promise<RoutingResult<undefined>>;
    set<SetInto extends TMessage>(into: SetInto, value: undefined): Promise<SetInto>;
}
export declare function value<T, TMessage extends HttpMessage = HttpMessage>(value: T, lens: MessageLens<TMessage, T>, opts?: Partial<StaticValueOpts<T>>): MessageLens<TMessage, undefined>;
//# sourceMappingURL=StaticValueLens.d.ts.map