Testing on forked chains

[Alderian]

Problem:

• Current TestHelper creates various endpoints, but the are all created on the same network
• The emulate message sending, but never leave the current network
• There is no way to test omnichain applications using already deployed contracts on forked chains

Solution:

The solution we came up with @shankars99 have these advantages:

1- It let you create and configure one endpoints for each fork you want to test
2- ensures oapps wires up thru the forks
3- It will let ppl test messaging and interact with already deployed contracts

Example usage:

• There is a MyOapp.t.sol that works
• Production example could be if you want a messaging system and you need to use Oracles or usa Uniswap to exchange, or any other contract that is already deployed and you want to test with those contracts.

Next steps:

1. Add something similar with hardhat (its possible to use the hardhat-switch-network plugin or similar
2. Add documentation on how to use this
3. Add the possibility to have more endpoints by fork