import { TransactionReceipt } from 'ethers';
import { RpcSource } from './index.js';
/**
 * Waits for a transaction to be mined and returns the transaction receipt.
 *
 * @param txHash - The hash of the transaction to wait for.
 * @param rpc - The RPC source to use for querying the blockchain.
 * @param timeout - The time to wait between checks, in milliseconds. Defaults to 20000ms.
 * @returns A promise that resolves to the TransactionReceipt, or null if the transaction is not found.
 */
export declare function awaitTx(txHash: string, rpc: RpcSource, timeout?: number): Promise<TransactionReceipt | null>;