/**
 * Minimal RLP (Recursive Length Prefix) encoder for EVM transaction serialization.
 *
 * Implements the RLP encoding scheme as specified in the Ethereum Yellow Paper,
 * Appendix B. Only encoding is needed — decoding is not required for transaction
 * construction.
 *
 * @see https://ethereum.org/en/developers/docs/data-structures-and-encoding/rlp/
 */
/** An RLP-encodable value: bytes, or a nested list of encodable values. */
export type RlpItem = Uint8Array | RlpItem[];
/**
 * RLP-encodes a single item or nested list of items.
 */
export declare function rlpEncode(input: RlpItem): Uint8Array;