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trezor-firmware/python/.changelog.d/2036.fixed
Alois Klink 5c4703c9bb fix(core,legacy): Fix domain-only ethTypedData
When doing Ethereum signTypedData, and the primaryType="EIP712Domain",
we completely ignore the "message" part and only sign the domain.

According to the community, this is technically allowed by the spec,
and may be used by ETH smart contracts to save on gas.

Test case generated by @MetaMask/eth-sig-util's library.

See: https://ethereum-magicians.org/t/eip-712-standards-clarification-primarytype-as-domaintype/3286
2022-01-14 14:22:46 +01:00

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Allow passing empty `message_hash` for domain-only EIP-712 hashes
for Trezor T1 (i.e. when `primaryType`=`EIP712Domain`)