import { Coin, CoinAmount, ERC20, Native } from '../types';
export declare const canUnwrapToken: (token: Coin) => token is Native;
export declare class NativeTokenService {
    readonly nativeToken: Native;
    readonly wrappedToken: ERC20;
    constructor(nativeToken: Native, wrappedToken: ERC20);
    wrapAmount(amount: CoinAmount<Native>): CoinAmount<ERC20>;
    unwrapAmount(amount: CoinAmount<ERC20>): CoinAmount<Coin>;
    maybeWrapToken(token: Coin): ERC20;
    maybeWrapAmount(amount: CoinAmount<Coin>): CoinAmount<ERC20>;
    private isWrappedNative;
    isWrapOrUnwrap(tokenIn: Coin, tokenOut: Coin): boolean;
}