/**
 * Solana tx wire-format helpers (pure byte ops, no @solana/web3.js).
 * Wire format: [shortvec sigCount] [sigCount × 64-byte sigs] [message bytes].
 * Used to confirm a wallet only ADDED a signature and didn't change the message.
 */
/** Offset where the message begins, or -1 if the tx bytes are malformed. */
export declare function solanaMessageOffset(serializedTx: Uint8Array): number;
/** V0 messages set the high bit (0x80) on the first message byte; legacy don't. */
export declare function isVersionedTransactionBytes(serializedTx: Uint8Array): boolean;
/**
 * Throw unless `returned` keeps the byte-identical message of `sent` — signing
 * may only add a signature. Compares the message region only (sigs differ).
 */
export declare function assertSameMessage(sent: Uint8Array, returned: Uint8Array): void;
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