Hey guys. Please tell me how to calculate gas price in my code for BUY transaction in BSC via Pancakeswap

The gasPrice in BSC is always the same: 5.5 gwei

Here triggers the error(in this method)

Exactly here

I ve deployed the contract and used new hex(pasted in here)
Then redeployed it a couple of times and got the same

keccak256(abi.encodePacked(type(UniswapV2Pair).creationCode));

Oh..., creation code is not the same, i think

Not hardcoded
bytes memory bytecode = type(UniswapV2Pair).creationCode;

But where i can set it

But why they have done deps like this: in order to alleviate the contract

yeah, otherwise library will be external and we should deploy and link it
e.g. setter for this