import BigNumber from "bignumber.js";
import { Contract } from "@ethersproject/contracts";
import EthereumConfig from "./ethereum";
import type { CurrencyConfig, Tx } from "../../common/types";
export interface ERC20CurrencyConfig extends CurrencyConfig {
    contractAddress: string;
}
export default class ERC20Config extends EthereumConfig {
    private contractInstance;
    private contractAddress;
    constructor(config: ERC20CurrencyConfig);
    getContract(): Promise<Contract>;
    getTx(txId: string): Promise<Tx>;
    /**
     * Returns the fee in CONTRACT CURRENCY UNITS equivalent to the fee derived via gas currency units, i.e Wei
     * @param amount
     * @param to
     * @returns
     */
    getFee(amount: BigNumber.Value, to?: string): Promise<BigNumber>;
    createTx(amount: BigNumber.Value, to: string, _fee?: string): Promise<{
        txId: string | undefined;
        tx: any;
    }>;
    getGas(): Promise<[BigNumber, number]>;
}
export declare const erc20abi: ({
    constant: boolean;
    inputs: {
        name: string;
        type: string;
    }[];
    name: string;
    outputs: {
        name: string;
        type: string;
    }[];
    payable: boolean;
    stateMutability: string;
    type: string;
    anonymous?: undefined;
} | {
    payable: boolean;
    stateMutability: string;
    type: string;
    constant?: undefined;
    inputs?: undefined;
    name?: undefined;
    outputs?: undefined;
    anonymous?: undefined;
} | {
    anonymous: boolean;
    inputs: {
        indexed: boolean;
        name: string;
        type: string;
    }[];
    name: string;
    type: string;
    constant?: undefined;
    outputs?: undefined;
    payable?: undefined;
    stateMutability?: undefined;
})[];