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 CollateralAPI extends TransactionAPI {
    /**
     * @returns Total locked collateral
     */
    totalLocked(): Promise<Big>;
    /**
     * @param id The ID of an account
     * @returns The reserved balance of the given account
     */
    balanceLocked(id: AccountId): Promise<Big>;
    /**
     * @param id The ID of an account
     * @returns The free balance of the given account
     */
    balance(id: AccountId): Promise<Big>;
    /**
     * Subscribe to free balance updates, denominated in DOT
     * @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>;
    /**
     * Send a transaction that transfers from the caller's address to another address
     * @param address The recipient of the transfer
     * @param amount The balance to transfer
     */
    transfer(address: string, amount: Big): Promise<void>;
}
export declare class DefaultCollateralAPI extends DefaultTransactionAPI implements CollateralAPI {
    constructor(api: ApiPromise, account?: AddressOrPair);
    totalLocked(): Promise<Big>;
    balanceLocked(id: AccountId): Promise<Big>;
    balance(id: AccountId): Promise<Big>;
    subscribeToBalance(account: string, callback: (account: string, balance: Big) => void): Promise<() => void>;
    transfer(address: string, amount: Big): Promise<void>;
}