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In response to the issues found in the audit report: | ||
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1. Indeed, with the current EVM design, it is impossible to guarantee that a contract will never receive Ether. The balance assertion has been removed. | ||
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2. This is intentional. When paying fees in the protocol token, Exchange users have the option to pay no fees. Relayers, which host off-chain orderbooks, can require particular fees for submission to their orderbooks. | ||
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3. Relayers can choose to whitelist or blacklist tokens to prevent user confusion, so implementing token restrictions at the protocol layer is unnecessary. |
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