Set up vesting

[gpersoon]

Assuming we want to stay in the Openzeppelin family of contracts, we could use:

• https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/finance/VestingWallet.sol

Seems like you setup a vesting contract per recipient, with a vesting period. Then you send to tokens to the contract, which can be released via release(token).

Note: combining vested tokens with voting is somewhat complicated. The following strategies of snapshot retrieve the vested tokens from vesting contracts:

• https://github.com/snapshot-labs/snapshot-strategies/blob/master/src/strategies/the-graph/tokenLockWallets.ts
• https://github.com/snapshot-labs/snapshot-strategies/blob/master/src/strategies/vested-deversifi/index.ts