export interface IBitcoinWallet {
    sendTransaction(address: string, amount: bigint, feeRate?: number): Promise<string>;
    getTransactionFee(address: string, amount: bigint, feeRate?: number): Promise<number>;
    getReceiveAddress(): string;
    getBalance(): Promise<{
        confirmedBalance: bigint;
        unconfirmedBalance: bigint;
    }>;
    getSpendableBalance(): Promise<{
        balance: bigint;
        feeRate: number;
        totalFee: number;
    }>;
}