Coding Challenge: Ballot

Run it

Install dependencies: yarn

Run tests: yarn test

Coverage: yarn coverage

build a voting app
eligible to vote are the stakers of a specific balancer pool
these stakers have voting rights proportionate to their stakes in the balancer pool
they can vote on adding/removing Owners to/from a Gnosis safe (= multisig contract)

to avoid double voting (that is using the same LP tokens to vote for the same proposal multiple times) LP token holders must stake their LP tokens to be able to propose or vote
if they unstake their tokens, all outstanding votes are erased
for a proposal to be accepted, the number of votes for the proposal must be larger than 50% of the total supply of LP tokens
the threshold for the Gnosis Safe (that is the number of signatures necessary to execute transactions) is handled by the voting app
the voting app takes care that this threshold is always set to the smallest possible majority (e.g. if there are 5 owners of the multisig the threshold will be 3 and if there are 2 owners the threshold will be 2)

the project consists of the voting app contract Ballot, the OwnerManager contract of the Gnosis Safe, a balancer pool contract BPool and two test token contracts TToken
Ballot inherits from OwnerManager and takes that ownership is managed through votes
there are also some slight modifications to the original OwnerManager module:
- adding and removing owners is only possible through internal function calls (-> Ballot) and not by multisig owners
- initially the deployer is set as first multisig owner in the constructor (see potential improvements)
- swapping owners is not possible anymore