import { ChainId } from '../constants/constants';
/**
 * A currency is any fungible financial instrument, including Ether, all ERC20 tokens, and other chain-native currencies
 */
export declare abstract class AbstractCurrency {
    /**
     * Returns whether the currency is native to the chain and must be wrapped (e.g. Ether)
     */
    abstract readonly isNative: boolean;
    /**
     * Returns whether the currency is a token that is usable in Uniswap without wrapping
     */
    abstract readonly isToken: boolean;
    /**
     * The chain ID on which this currency resides
     */
    readonly chainId: ChainId;
    /**
     * The decimals used in representing currency amounts
     */
    readonly decimals: number;
    /**
     * The symbol of the currency, i.e. a short textual non-unique identifier
     */
    readonly symbol?: string;
    /**
     * The name of the currency, i.e. a descriptive textual non-unique identifier
     */
    readonly name?: string;
    /**
     * Constructs an instance of the base class `BaseCurrency`.
     * @param chainId the chain ID on which this currency resides
     * @param decimals decimals of the currency
     * @param symbol symbol of the currency
     * @param name of the currency
     */
    protected constructor(chainId: ChainId, decimals: number, symbol?: string, name?: string);
    /**
     * Returns whether this currency is functionally equivalent to the other currency
     * @param other the other currency
     */
    abstract equals(other: Currency): boolean;
    /**
     * Return the wrapped version of this currency that can be used with the Uniswap contracts. Currencies must
     * implement this to be used in Uniswap
     */
    abstract wrapped(): Token;
    /**
     * Returns native version of currency (WETH => ETH)
     */
    abstract unwrapped(): Currency;
}
/**
 * Represents the native currency of the chain on which it resides, e.g.
 */
export declare class Native extends AbstractCurrency {
    readonly isNative: true;
    readonly isToken: false;
    static readonly NATIVE: {
        [chainId in ChainId]: Native;
    };
    protected constructor(chainId: ChainId, decimals: number, symbol?: string, name?: string);
    equals(other: Currency): boolean;
    wrapped(): Token;
    unwrapped(): Currency;
}
/**
 * Represents an ERC20 token with a unique address and some metadata.
 */
export declare class Token extends AbstractCurrency {
    readonly address: string;
    readonly isNative: false;
    readonly isToken: true;
    constructor(chainId: ChainId, address: string, decimals: number, symbol?: string, name?: string);
    /**
     * Returns true if the two tokens are equivalent, i.e. have the same chainId and address.
     * @param other other token to compare
     */
    equals(other: Currency): boolean;
    /**
     * Returns true if the address of this token sorts before the address of the other token
     * @param other other token to compare
     * @throws if the tokens have the same address
     * @throws if the tokens are on different chains
     */
    sortsBefore(other: Token): boolean;
    /**
     * Return this token, which does not need to be wrapped
     */
    wrapped(): Token;
    /**
     * Return this token, which does not need to be wrapped
     */
    unwrapped(): Currency;
}
declare const NATIVE: {
    1: Native;
    3: Native;
    4: Native;
    5: Native;
    42: Native;
    137: Native;
    56: Native;
    97: Native;
};
export { NATIVE };
export declare const WNATIVE: {
    [chainId in ChainId]: Token;
};
export declare type Currency = Native | Token;
export declare function isCurrency(obj?: any): boolean;