/**
 * @param {KeyInput | KeyInput[] | KeyResolverFn} keyish
 * @param {Record<string, unknown>} header
 * @param {string} alg
 * @returns {Promise<KeyObj>}
 */
export function resolveKey(keyish: KeyInput | KeyInput[] | KeyResolverFn, header: Record<string, unknown>, alg: string): Promise<KeyObj>;
export type KeyObj = any;
export type KeyInput = import("./keys.js").KeyInput;
export type KeyResolverFn = (header: Record<string, unknown>) => KeyInput | Promise<KeyInput>;