import { EvmWalletProvider } from "../../wallet-providers";
export declare const PERMIT2_ADDRESS = "0x000000000022D473030F116dDEE9F6B43aC78BA3";
/**
 * Checks if a token is native ETH.
 *
 * @param token - The token address to check.
 * @returns True if the token is native ETH, false otherwise.
 */
export declare function isNativeEth(token: string): boolean;
/**
 * Gets the details (decimals and name) for both fromToken and toToken
 *
 * @param walletProvider - The EVM wallet provider to read contracts
 * @param fromToken - The contract address of the from token
 * @param toToken - The contract address of the to token
 * @returns Promise<{fromTokenDecimals: number, toTokenDecimals: number, fromTokenName: string, toTokenName: string}>
 */
export declare function getTokenDetails(walletProvider: EvmWalletProvider, fromToken: string, toToken: string): Promise<{
    fromTokenDecimals: number;
    toTokenDecimals: number;
    fromTokenName: string;
    toTokenName: string;
}>;