Submitted by WatchPug
https://github.com/Plex-Engineer/zeroswap/blob/03507a80322112f4f3c723fc68bed0f138702836/contracts/uniswapv2/libraries/UniswapV2Library.sol#L20-L28
The init code hash in UniswapV2Library.pairFor() should be updated since the code of UniswapV2Pair has been changed. Otherwise, the pair address calculated will be wrong, most likely non-existing address.
There are many other functions and other contracts across the codebase, including  UniswapV2Oracle, UniswapV2Router02, and SushiRoll, that rely on the UniswapV2Library.pairFor() function for the address of the pair, with the UniswapV2Library.pairFor() returning a wrong and non-existing address, these functions and contracts will malfunction.
Update the init code hash from hex'e18a34eb0e04b04f7a0ac29a6e80748dca96319b42c54d679cb821dca90c6303' to the value of UniswapV2Factory.pairCodeHash().
tkkwon1998 (Canto) confirmed
Alex the Entreprenerd (judge) commented:
