Solidity swap and add liquidity in contract

Solidity Programming
#1

I don’t understand what the error is, when you execute the ZapInToken function with a pair of Cake/WBNB or Cake/USDT tokens, everything is completed successfully. If you take a pair with a commission of 5% (pancakeswap), it returns the error: “Gas estimation errored with the following message (see below). The transaction execution will likely fail. Do you want to force sending? Returned error: {“jsonrpc”:“2.0”,“error”:“execution reverted”,“id”:2392006384191628}” Despite the fact that the contract has the SetFee function, and I set the required commission there.

ZapV2.sol

I tried to change the commission size using the SetFee function, approve everything was done, the number of tokens was also sufficient.

#2

This error can occur if you are calling the contract function on the wrong chain or if the function which you are calling does not exist.