import { TradeType } from '@uniswap/sdk-core';
import { JsonRpcProvider, TransactionRequest } from 'ethers';
import { CoinAmount, Coin, ERC20, Native, SecondaryFee, TransactionDetails } from '../../types';
type PreparedApproval = {
    spender: string;
    amount: CoinAmount<ERC20>;
};
export declare const prepareApproval: (tradeType: TradeType, userSpecifiedAmount: CoinAmount<Coin>, quotedAmountWithSlippage: CoinAmount<Coin>, contracts: {
    routerAddress: string;
    secondaryFeeAddress: string;
}, secondaryFees: SecondaryFee[]) => PreparedApproval | null;
/**
 * Get an unsigned approval transaction if needed
 *
 * @param provider The provider to use for the call
 * @param ownerAddress The address of the owner of the token
 * @param tokenAddress The address of the token to approve
 * @param tokenAmount The amount of the token to approve
 * @param spenderAddress The address of the spender
 * @returns The unsigned ERC20 approve transaction, or null if no approval is needed
 */
export declare const getApproveTransaction: (provider: JsonRpcProvider, ownerAddress: string, tokenAmount: CoinAmount<ERC20>, spenderAddress: string) => Promise<TransactionRequest | null>;
export declare function getApproveGasEstimate(provider: JsonRpcProvider, ownerAddress: string, spenderAddress: string, tokenAddress: string): Promise<bigint>;
export declare const getApproval: (provider: JsonRpcProvider, ownerAddress: string, preparedApproval: PreparedApproval, gasPrice: CoinAmount<Native> | null) => Promise<TransactionDetails | null>;
export {};