import { ApprovalDataCallback, HttpWrapper, LoggerInterface, RelayRequest } from '@opengsn/common';
export declare const DEFAULT_VERIFIER_SERVER_URL = "https://staging-api.opengsn.org";
export declare const DEFAULT_VERIFIER_SERVER_APPROVAL_DATA_LENGTH = 65;
export interface ApprovalRequest {
    apiKey: string;
    chainId: number;
    domainSeparatorName: string;
    relayRequest: RelayRequest;
    relayRequestId: string;
}
export declare function createVerifierApprovalDataCallback(httpWrapper: HttpWrapper, logger: LoggerInterface, domainSeparatorName: string, chainId: number, apiKey: string, verifierUrl: string): ApprovalDataCallback;