To improve security and user confidence during Ethereum smart contract transactions, I propose adding a feature to display a hash (e.g., SHA-256 or Keccak-256) of the raw calldata or contract call payload on the hardware wallet screen. Because calldata can be very long and complex, displaying it fully on a small device screen is impractical and may lead to blind signing risks. Showing a concise hash digest provides a compact, verifiable fingerprint that users can cross-reference with off-device tools or UIs, ensuring the integrity of the transaction input before signing. This feature would be especially valuable for users interacting with complex contracts or multisig wallets, helping prevent unauthorized or malicious payloads from being signed unknowingly. Ideally, this hash display could be optional or part of an advanced security mode, to balance usability and security.