This is needed to deploy individual new `StakeManager` instances in
both, production environment and testing.
The script can be used as follows:
Within tests, to get a new `StakeManager` instance that has a reference
to an older `StakeManager` instance, run:
```solidity
function setUp() public virtual override {
super.setUp();
DeployMigrationStakeManager deployment = new DeployMigrationStakeManager(address(stakeManager), stakeToken);
newStakeManager = deployment.run();
}
```
Where `address(stakeManager)` is the address of the current
`StakeManager` and `stakeToken` is the address of the stake token.
To deploy a new instance from the CLI using `forge`, one can make use of
the `PREV_STAKE_MANAGER` and `STAKE_TOKEN_ADDRESS` environment variables
like this:
```sh
$ PREV_STAKE_MANAGER=0x123 STAKE_TOKEN_ADDRES=0x456 forge script script/DeployMigrationStakeManager.s.sol
```
The script will revert when `STAKE_TOKEN_ADDRESS` is `address(0)`.
Closes#71
r4bbit