/**
 * Provides a representation of a token transfer transaction, aswell as a processor to detect transfer events.
 *
 * @module erc20
 */
import { BN } from 'bn';
import { Log, Tx } from './tx';
declare const topics: {
    transfer: string;
};
/**
 * A Transfer instance represents a single ERC20 token transfer.
 *
 * @class Transfer
 */
declare class Transfer {
    from: string;
    to: string;
    token: string;
    value: BigInt;
    tx: Tx;
    /**
     *
     * @param tx A transaction object
     * @param token Ethereum address of ERC20 token transferred
     * @param from Ethereum address of sender
     * @param to Ethereum address of receipient
     * @param value Value of transfer
     */
    constructor(tx: Tx, token: string, from: string, to: string, value: BigInt);
    /**
     * Scans a transaction log for transfer event.
     *
     * @static
     * @param w3 A connected Web3 object
     * @param success State of transaction
     * @param token Token address to find transfer for
     * @param log A Web3 transaction receipt logs array
     * @return transfer Instance of Transfer if transfer is found, undefined if not.
     */
    static processLog(w3: any, success: boolean, token: string, log: Log): Promise<Transfer>;
}
/**
 * Metadata for a single ERC20 token.
 *
 * @class Token
 *
 */
declare class Token {
    address: string;
    name: string;
    decimals: number;
    totalSupply: BN;
    symbol: string;
    /**
     *
     * @param address Ethereum address of token contract
     * @param name ERC20 token name
     * @param symbol ERC20 token symbol
     */
    constructor(address: string, name: string, symbol: string, decimals: number, totalSupply: BN);
    /**
     * Informal string representation of token.
     *
     */
    toString(): string;
}
export { Transfer, Token, topics, };