Tweak validation of pre-authorized GetOwnershipProof #2122
Merged
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Implements #1160 (comment).
This PR modifies the validation rules for pre-authorized
GetOwnershipProof
messages. Trezor will only check that commitment data starts with a length-prefixed name of the CoinJoin coordinator. The name can be followed by any other challenge that the coordinator chooses, typically a 32-byte round ID.