feat(contracts): implement governance token system - #109
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- contracts/GOV_Token.sol: ERC-20 BOXMKT token
- 100M max supply cap
- Admin + authorised minter roles
- Linear vesting schedules with escrow (create / release / revoke)
- Weekly emission mints with configurable cooldown
- Full ERC-20: transfer, transferFrom, approve, increase/decreaseAllowance, burn
- contracts/Timelock.sol: 2-day timelock executor
- MIN_DELAY = 2 days, MAX_DELAY = 30 days, GRACE_PERIOD = 14 days
- queue() / execute() / cancel() with CEI pattern in execute()
- Separate proposer and executor roles (set to Voting contract)
- hashTransaction() view helper for off-chain tooling
- contracts/Voting.sol: veToken governance
- Lock BOXMKT 1–4 years; voting power = amount × lockYears (1×–4×)
- extendLock() increases power without unlock penalty
- Proposals: 5-day voting period, 4% quorum (QUORUM_BPS = 400)
- Proposal threshold: 1 000 BOXMKT locked
- Passes → auto-queued in Timelock via finalise()
- execute() forwards call through Timelock after 2-day delay
- Immutable on-chain voteHistory array for full audit trail
- cancel() works for both Active and Queued proposals
Closes GruftNet#80
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Closes #80 — Build Governance Token System
contracts/GOV_Token.sol — BOXMKT ERC-20 Token
transfer,transferFrom,approve,increaseAllowance,decreaseAllowance,burncreateVesting()/releaseVested()/revokeVesting()emitTokens()with cooldown enforcementcontracts/Timelock.sol — 2-day Timelock Executor
MIN_DELAY = 2 days,GRACE_PERIOD = 14 daysqueue()/execute()/cancel()— CEI pattern: state set toExecutedbefore external callproposerandexecutorroles (set to Voting contract on deploy)isReady()andhashTransaction()view helpers for off-chain toolingcontracts/Voting.sol — veToken Governance
lock()/extendLock()/unlock()— tokens held in escrow until expiryfinalise()→ queues passing proposals in Timelock automaticallyexecute()→ forwards call through Timelock after 2-day delayvoteHistory[]array;getVoteHistory(from, to)for paginationcancel()works for both Active and Queued proposals (also cancels in Timelock)closes Build Governance Token System #80