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Why is the Gateway implemented as an Arbitrum rollup? 
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Do the coprocessors need to act as L1 nodes as well, or can they operate independently? 
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It seems that ZAMA tokens are not currently required when making encryption or decryption requests. Are these operations free for now? 
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When a homomorphic operation request is submitted on L1 and an event is emitted for the corresponding ciphertext handle, who is responsible for watching the event and triggering the actual execution request — the Gateway or the coprocessors? (Similar to question 2) 
Why are the KMS, Coprocessor, and Gateway separated in Zama’s architecture? Are they operated by different entities?