/**
 * Major functions of this file have been taken from https://github.com/LedgerHQ/app-solana/blob/develop/examples/example-sign.js
 * Thus, have not been fully tested (unit tests + manual tests)
 * We should add more tests in the future
 */
/**
 * V1 wire format (sRFC 38, per app-solana parser):
 *   signing domain  (16 B): 0xFF + "solana offchain"
 *   version         ( 1 B): 0x01
 *   signer count    ( 1 B): 1
 *   signer          (32 B)
 *   [message length ( 2 B): little-endian uint16] — only when includeLengthPrefix
 *   message body    (variable)
 *
 * The finalised sRFC 38 layout drops the length prefix. `includeLengthPrefix`
 * reproduces the pre-spec-update layout for backward compatibility with older
 * firmware that rejects the no-prefix form with 6a81.
 */
export declare function toOffChainMessageV1(message: string, signerAddress: string, includeLengthPrefix?: boolean): Buffer;
export declare function toOffChainMessage(message: string, signerAddress: string, isLegacy: boolean): Buffer;
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