import { type TransactionObjectArgument } from '@mysten/sui/transactions';
import type { MergeCoinArgs } from '../types';
/**
 * Merges provided coins into a single transaction block.
 * @param {Transaction} tx - The transaction block to merge coins into.
 * @param {CoinStruct[]} coins - The coins to merge.
 * @return {TransactionObjectArgument} The merged coin.
 * @throws {Error} Throws an error if no coins are provided to merge.
 */
export declare function mergeCoins({ tx, coins, }: MergeCoinArgs): TransactionObjectArgument;