Ekubo Governance

Contracts for token-based governance on Starknet.

Components

Contracts in this repository are designed so that they may be used together or independently.

Distribution

Airdrop

Airdrop is a highly-optimized distribution contract for distributing a fungible ERC20-like token to many (O(1e6)) accounts. To use it, you must compute a binary merkle tree using the pedersen hash function of an id-sorted list of Claim structs. The root of this tree and the token address are passed as constructor arguments and cannot change.

• Compute a merkle root by producing a list of Claim structs, hashing them, sorting by sequentially-assigned ID, and arranging them into a merkle binary tree
  • Claim IDs must be sorted, start from 0 and be contiguous to make optimal use of the contract's claim_128 entrypoint
• Deploy the airdrop with the root from this merkle tree and the token address
• Transfer the total amount of tokens to the Airdrop contract
• Unclaimed tokens can be refunded to the specified-at-construction refund_to address after the refundable_timestamp, iff refundable_timestamp is not zero

Governance

Staker

Staker enables users to delegate the balance of a token towards an account, and tracks the historical delegation at each block. In addition, it allows the computation of the time-weighted average delegated tokens of any account over any historical period.

• Users call Token#approve(staker, stake_amount), then Staker#stake_amount(delegate, stake_amount) to stake and delegate their tokens to other addresses
• Users call Staker#withdraw_amount(delegate, recipient, amount) to remove part or all of their delegation
• The average delegation weight is computable over any historical period
• The contract has no owner, and cannot be updated nor configured

Governor

Governor enables stakers to vote on whether to make a batch of calls.

• A user's voting weight for a period is determined by their average total delegation over the period voting_weight_smoothing_duration
• A delegate may create a proposal to make a batch of calls if their voting weight exceeds the proposal creation threshold
• After the voting_start_delay, users may choose to vote yea or nay on the created proposal for the duration of the voting_period
  • A voter's voting weight is computed based on their average delegation over the period voting_weight_smoothing_duration from before the start time of the proposal
• If a proposal receives at least quorum in voting weight, and the simple majority of total votes is yea, and the voting period is over, the proposal may be executed exactly once
  • Must happen after the voting has ended and the execution delay has passed
  • If any of the calls fails, the transaction will revert, and anyone may attempt to execute the proposal again, up until the end of the execution window
• Proposals can be canceled at any time by anyone iff the voting weight of the proposer falls below the proposal creation threshold, up until it is executed
• The proposer may also cancel the proposal at any time before the end of the voting period
• Proposers may only have one active proposal at any time
• The contract can be upgraded via calls to self

Testing

Make sure you have Scarb with asdf installed. You can look at the .tool-versions file to know which version of Scarb is currently used.

To run unit tests:

scarb test

Disclaimer

These contracts are unaudited. Use at your own risk. Additional review is greatly appreciated.