Token implementation

[vminkov]

Background

• ERC20 - name to be decided later

• Use Solmate ERC20 with permit

• Implement on the side linear time lock - use the Fei implementation https://github.com/fei-protocol/fei-protocol-core/blob/develop/contracts/timelocks/LinearTokenTimelock.sol

• Clawback / revoke

• Extra data arg for transfer() to enable direct deposits to CEX cold-wallets

Linked Issues & Documentation

• Midas Token Deployment #241

Definition Of Done

The token and timelock contracts are implemented and the permit function is tested in a unit test. The extra param on the transfer function is emitted with an addtional Transfer() event.
The deployment scripts are updated to include the token.

Tasks

• Implement ERC20 token
• Implement timelocks for vesting
• Unit test
• Deployment script updated