import { AllowanceType, TokenAllowance, TokenInstanceKey } from "@gala-chain/api";
import { BigNumber } from "bignumber.js";
import { GalaChainContext } from "../types";
export declare function isAllowanceSpent(allowance: TokenAllowance): boolean;
export declare function isAllowanceExpired(ctx: GalaChainContext, allowance: TokenAllowance): boolean;
/**
 * @description
 *
 * Iterate through the provided `TokenAllowance` chain objects,
 * deleting those from world state that: a) have exhausted all uses, b) are expired,
 * c) are otherwise invalid or unnecessary
 *
 * @param ctx
 * @param allowancesToClean `TokenAllowance[]`
 * @param authorizedOnBehalf `string`
 * @returns `Promise<Array<TokenAllowance>>`
 */
export declare function cleanAllowances(ctx: GalaChainContext, allowancesToClean: TokenAllowance[], authorizedOnBehalf: string): Promise<Array<TokenAllowance>>;
/**
 * @description
 *
 * Given an array of allowances,
 *
 * 1. clean up and delete expired / fully used allowances
 * 2. Match the remaining allowances against the `TokenInstanceKey` and `AllowanceType`
 * 3. Sum up and return the total useable allowance quantity available
 *
 * @param ctx
 * @param applicableAllowances
 * @param tokenInstanceKey
 * @param action
 * @param callingOnBehalf
 * @returns `Promise<BigNumber>`
 */
export declare function checkAllowances(ctx: GalaChainContext, applicableAllowances: TokenAllowance[], tokenInstanceKey: TokenInstanceKey, action: AllowanceType, callingOnBehalf: string): Promise<BigNumber>;
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