import { BigNumber } from '@ethersproject/bignumber';
import { Contract } from '@ethersproject/contracts';
import type { Provider } from '@ethersproject/providers';
import { Authorization } from './types';
export declare enum AuthorizationError {
    REVOKE_FAILED = "revoke-failed-error",
    GRANT_FAILED = "grant-failed-error",
    INSUFFICIENT_ALLOWANCE = "insufficient-allowance",
    FETCH_AUTHORIZATIONS_FAILURE = "fetch-authorizations-failure"
}
export declare function getTokenAmountToApprove(): BigNumber;
export declare function hasAuthorization(authorizations: Authorization[], authorizationToFind: Authorization): boolean;
export declare function hasAuthorizationAndEnoughAllowance(authorizations: Authorization[], authorizationToFind: Authorization, allowance: string): boolean;
export declare function areEqual(left: Authorization, right: Authorization): boolean;
export declare function isValidType(type: string): boolean;
export declare function getERC20ContractInstance(contractAddress: string, provider: Provider): Contract;
export declare function getERC721ContractInstance(contractAddress: string, provider: Provider): Contract;
export declare function getCollectionV2ContractInstance(contractAddress: string, provider: Provider): Contract;