Trezor has officially enabled clear signing via the ERC-7730 standard, giving hardware wallet users a way to verify Ethereum smart contract transactions in human-readable form instead of approving an opaque hexadecimal hash. The rollout was confirmed on September 8 by Trezor and the Ethereum Foundation, extending the Foundation’s Trillion Dollar Security Initiative to another major hardware wallet family.
The update targets a long-standing weakness known as blind signing. Previously, a user might see a friendly description on a computer screen—such as “swap 2,000 USDC for ETH”—while the actual transaction data arriving at the wallet was an unreadable string of calldata. If the connected computer was compromised, the wallet screen could not reveal the mismatch, and the user could unknowingly approve a malicious transaction. The Ethereum Foundation has linked blind signing to some of the largest thefts in crypto history, including the $1.5 billion Bybit breach.
With ERC-7730 clear signing active, supported Trezor devices break down contract calls and render the action, token amounts, and destination directly on the device. Trezor says users do not need to install or toggle anything: the feature works automatically via Trezor Suite, WalletConnect, and Trezor Connect, and the underlying decoding stack is open-source. At launch, supported protocols include 1inch, Aave, Lido, Tether, LiFi, and Hyperliquid. On the hardware side, the feature is available on the Trezor Safe 7, Safe 5, Safe 3, and Model T, while the Model One is not supported.
ERC-7730 was originally built by Ledger as an internal feature and later formalized as a standard in 2024. Governance was handed to the Ethereum Foundation to keep the format neutral. Contract descriptors live in an off-chain registry at clearsigning.org, allowing existing contracts to adopt the format without redeployment, while an attestation layer lets independent auditors verify that descriptors match actual contract behavior. The security benefit grows as more decentralized applications and networks are added to the registry.
