import type { JsonRpcProvider, JsonRpcSigner } from '@ethersproject/providers';
import { BigNumber } from 'ethers';
import { ChainId } from './generics';
export declare const DEFAULT_ADDRESS = "0xD4a0281cEeebA1CEeFB4eAbF63ca6A608E143Fdc";
export declare class Config {
    library: JsonRpcProvider;
    signer: JsonRpcSigner | undefined;
    chainId: number;
    get account(): string;
    constructor({ chainId, account, provider, signer, }: {
        chainId: ChainId;
        account?: string;
        provider?: JsonRpcProvider;
        signer?: JsonRpcSigner;
    });
    setLibrary: ({ chainId, account, provider, }: {
        chainId: ChainId;
        account?: string | undefined;
        provider?: JsonRpcProvider | undefined;
    }) => void;
    setChainId: ({ chainId }: {
        chainId: ChainId;
    }) => void;
    setAccount: ({ account }: {
        account: string;
    }) => void;
    getLastBlock: () => Promise<{
        blockNumber: number;
        blockTimestamp: BigNumber;
    }>;
    protected _account: string;
}