Solidity devs, need your help confirming something: 

Let’s say I have 100 ERC721 tokens that have a custom uint8 state, and I want to update that state by -1 for all tokens at once. Would you:

A. Loop over in the contract with high gas estimation 

B. Loop on the client sending lots of smaller transactions

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For only 100? One transaction 
General case with n? In batches 
Best to avoid this situation where possible. State writes are by far the most expensive operation in the evm