import { AccountId } from "@polkadot/types/interfaces/runtime";
import { ApiPromise } from "@polkadot/api";
import { AddressOrPair } from "@polkadot/api/types";
import Big from "big.js";
import { DefaultTransactionAPI, TransactionAPI } from "./transaction";
/**
 * @category PolkaBTC Bridge
 * The type Big represents DOT or PolkaBTC denominations,
 * while the type BN represents Planck or Satoshi denominations.
 */
export interface TreasuryAPI extends TransactionAPI {
    /**
     * @returns The total amount issued in the system
     */
    total(): Promise<Big>;
    /**
     * @param id The AccountId of a user
     * @returns The user's balance
     */
    balance(id: AccountId): Promise<Big>;
    /**
     * @param destination The address of a user
     * @param amount The amount to transfer
     */
    transfer(destination: string, amount: Big): Promise<void>;
    /**
     * Subscribe to balance updates, denominated in PolkaBTC
     * @param account AccountId string
     * @param callback Function to be called whenever the balance of an account is updated.
     * Its parameters are (accountIdString, freeBalance)
     */
    subscribeToBalance(account: string, callback: (account: string, balance: Big) => void): Promise<() => void>;
}
export declare class DefaultTreasuryAPI extends DefaultTransactionAPI implements TreasuryAPI {
    constructor(api: ApiPromise, account?: AddressOrPair);
    total(): Promise<Big>;
    balance(id: AccountId): Promise<Big>;
    subscribeToBalance(account: string, callback: (account: string, balance: Big) => void): Promise<() => void>;
    transfer(destination: string, amount: Big): Promise<void>;
}