import { Account, providers as najProviders } from 'near-api-js';
/**
 * Given an nep141 contract address, get the Aurora erc20 contract address of the
 * corresponding BridgeToken contract.
 *
 * @param params Uses Named Arguments pattern, please pass arguments as object
 * @param params.nep141Address Contract address of an NEP-141 token on NEAR
 * @param params.options Optional arguments.
 * @returns string Contract address of ERC-20 BridgeToken on Aurora
 */
export declare function getAuroraErc20Address({ nep141Address, options }: {
    nep141Address: string;
    options?: {
        nearAccount?: Account;
        nearProvider?: najProviders.Provider;
        auroraEvmAccount?: string;
    };
}): Promise<string | null>;
/**
 * Given a bridged ERC-20 contract address, get the original NEP-141 contract address.
 *
 * @param params Uses Named Arguments pattern, please pass arguments as object
 * @param params.auroraErc20Address Contract address of a bridged ERC-20 token on Aurora
 * @param params.options Optional arguments.
 * @returns string Contract address of NEP-141 token on NEAR
 */
export declare function getNep141Address({ auroraErc20Address, options }: {
    auroraErc20Address: string;
    options?: {
        nearAccount?: Account;
        nearProvider?: najProviders.Provider;
        auroraEvmAccount?: string;
    };
}): Promise<string | null>;
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