It seems that exchangeProxy stored inside constants.ts is not used and instead the address is read via getContractAddressesForChainOrThrow from the @0x/contract-addresses package. See SellMarket.js file for instance.
I noticed that because the current Goerli exchangeProxy address is incorrect (0xdef1c0ded9bec7f1a1670819833240f027b25eff instead of 0xf91bb752490473b8342a3e964e855b9f9a2a668e), but 0x fill operations are still working.
Context
It seems that
exchangeProxystored insideconstants.tsis not used and instead the address is read viagetContractAddressesForChainOrThrowfrom the@0x/contract-addressespackage. SeeSellMarket.jsfile for instance.I noticed that because the current Goerli exchangeProxy address is incorrect (
0xdef1c0ded9bec7f1a1670819833240f027b25effinstead of0xf91bb752490473b8342a3e964e855b9f9a2a668e), but 0x fill operations are still working.Confirm and clean up.