Modify MerkleDistributor to allow guild to withdraw unclaimed OMN

[hexyls]

At the moment the default MerkleDistributor does not allow us to retrieve unclaimed OMN, should add this functionality so OMN does not get stuck in the smart contract forever.

[hexyls]

MerkleDistributor has been updated with a simple withdraw function: https://github.com/hexyls/omen-airdrop/blob/master/contracts/MerkleDistributor.sol#L217

@KadenZipfel can you please checkout this change 👆

I don't think we should specify how long until we can withdraw, we can just lean on a social consensus target of three months and then vote to withdraw when ready.

[kadenzipfel]

MerkleDistributor has been updated with a simple withdraw function: https://github.com/hexyls/omen-airdrop/blob/master/contracts/MerkleDistributor.sol#L217

@KadenZipfel can you please checkout this change 👆

I don't think we should specify how long until we can withdraw, we can just lean on a social consensus target of three months and then vote to withdraw when ready.

Should be function withdraw() public onlyOwner, and I actually think that we should set a minimum time until withdraw since it takes some time for the guild to properly stabilize and decentralize, and until then we probably don't want to have such a powerful function. I've also made a note to make sure this is reviewed in audit

[hexyls]

@KadenZipfel updated: https://github.com/hexyls/omen-airdrop/blob/master/contracts/MerkleDistributor.sol#L219 What do you think about the three month withdraw delay? Too long, too short, just right? 😄

[kadenzipfel]

@KadenZipfel updated: https://github.com/hexyls/omen-airdrop/blob/master/contracts/MerkleDistributor.sol#L219 What do you think about the three month withdraw delay? Too long, too short, just right? 😄

Still need to remove the brackets () on onlyOwner, but I think 90 days is a good amount