import { Callback, Context, CustomAuthorizerEvent } from 'aws-lambda';
export declare class ApiGatewayAdapterAuthenticationHandler {
    private webTokenManipulator;
    constructor(issuer: string, encryptionKeys: string);
    lambdaHandler(event: CustomAuthorizerEvent, context: Context, callback: Callback): void;
    private createPolicy;
    static extractTokenStringFromAuthorizerEvent(event: CustomAuthorizerEvent): string;
}