Working with multiple version of openzeppelin

Smart Contracts
1

Hi all, I am trying to work with multiple versions of @openzeppelin, this is because I am using the @openzeppelin2.x crowdsales using sol 0.5 and I had some contracts using sol 0.8. Please How do I manage both?

And I observed that I could not use solc 0.8 in the contract inheriting from the @openzeppelin2.x crowdsales since it is built with solc 0.5 hence I'm forced to use solc 0.5 in my contract. See the error below:

> ParserError: Source file requires different compiler version (current compiler is 0.8.16+commit.07a7930e.Emscripten.clang) - note that nightly builds are considered to be strictly less than the released version
> --> @openzeppelin/contracts/crowdsale/Crowdsale.sol:1:1:
> |
> 1 | pragma solidity ^0.5.0;
> | ^^^^^^^^^^^^^^^^^^^^^^^

2

Hey @dtobi59
You could upgrade the crowdsale contract and use a newer version

3

@FreezyEx thanks for your response. I will really appreciate it if you point me to resources to help me to upgrade the crowdsales contract. Thanks

4

Would this be a good approach to follow?

5

@dtobi59 It should be fine but depends on what you want to do

6

Or do you think rewriting my code to use solc 0.5 will be best? Really confused. Please help , Thanks

7

Wow! it's been a journey. I have successfully upgraded the crowd sales smart contract to solc 0.8.9 with all test passing. My question now is should make this a new package on npm or can I submit a PR to the Openzepplin repo?

8

@dtobi59 We are not at the moment interested in adding back the Crowdsale contracts in the repo.

9

Thanks @frangio for your response. So I created the crowdsale contracts from the openzeppellin repo using solc 0.8.9. see repo here -> https://github.com/dtobi59/crowdsale