import type { Hex } from "../../utils/encoding/hex.js";
import { type SerializableTransaction } from "../serialize-transaction.js";
export type SignTransactionOptions = {
    transaction: SerializableTransaction;
    privateKey: Hex;
};
/**
 * Signs a transaction to be sent to a node.
 * @param options The options for signing.
 * @param options.transaction - The transaction object to sign
 * @param options.privateKey - The account private key
 * @returns The signed transaction as a hex string
 * @example
 * ```ts
 * import { signTransaction } from "thirdweb";
 * signTransaction({
 *   transaction: {
 *     ...
 *   },
 *   privateKey: "0x...",
 * });
 * ```
 * @transaction
 */
export declare function signTransaction({ transaction, privateKey, }: SignTransactionOptions): Hex;
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