export type HeaderRecord = Record<string, string | string[] | number | undefined>;
export type HeaderGetter = {
    get(name: string): string | null;
};
export type HeaderSource = HeaderGetter | HeaderRecord;
export type RequestLike = {
    headers: HeaderSource;
};
export type RemoteAddress = string | {
    address?: string;
    hostname?: string;
    port?: number;
};
export interface TrustedClientIpOptions {
    headers?: HeaderSource;
    request?: RequestLike;
    socketRemoteAddress?: string;
    remoteAddress?: RemoteAddress;
}
export declare function resolveTrustedClientIp(options: TrustedClientIpOptions): string | undefined;