this repo shows an example of a vyper contract compatible with CWIA proxy factory.
unlike eip-1167, these proxies can contain a block of immutable data.
this data is appended to calldata when making a delegatecall to the logic contract.
the logic contract then can calculate the offset using the data length appended as the last 2 bytes.
it provides a guarantee the contract won't try reading immutables from user input.
call [selector][arg1][arg2]
delegatecall [selector][arg1][arg2][immutable1][immutable2][extra]it is up to you how to encode and decode immutables, but you must be very careful to not mix up their offsets.
i provide one example in the tests/ folder.
Q: what about a vyper cwia factory?
A: maybe soon