import { UseQueryResult } from '@tanstack/react-query';
import { ChainId, Token } from '@ape.swap/apeswap-lists';
/**
 * useAllowance hook: fetches the amount approved by the user for a given token
 * useApproval hook: returns the approval state (not approved, pending or approved) and a function to approve on chain
 * getTokenAllowance function fetches the allowance on chain
 */
export declare enum ApprovalState {
    NOT_APPROVED = "NOT_APPROVED",
    PENDING = "PENDING",
    APPROVED = "APPROVED"
}
export default function useAllowance(currency: 'NATIVE' | Token | null, spender: string | null, account: string | null, chainId: ChainId | null): UseQueryResult<number | null>;
export declare const getTokenAllowance: (currency: "NATIVE" | Token | null, spender: string | null, account: string | null, chainId: ChainId | null) => Promise<number | null>;
export declare const useApproval: (amount: string, currency: "NATIVE" | Token | null, spender: string | null, account: string | null, chainId: ChainId | null) => [ApprovalState, () => Promise<string | null | undefined>];