/**
 * Robinhood Chain EIP-1559 签名
 */
export interface RobinhoodSignParams {
    rpcUrl?: string;
    privateKey: string;
    to: string;
    data: string;
    value?: bigint;
    gasLimit: bigint;
    gasPrice?: bigint;
    nonce?: number;
}
export interface RobinhoodSignedTx {
    signedTx: string;
    from: string;
    nonce: number;
    hash: string;
}
export declare function signRobinhoodTx(params: RobinhoodSignParams): Promise<RobinhoodSignedTx>;