GovernorBravoDelegate
GovernorBravoDelegate
Venus Governance latest on chain governance includes several new features including variable proposal routes and fine grained pause control. Variable routes for proposals allows for governance paramaters such as voting threshold and timelocks to be customized based on the risk level and impact of the proposal. Added granularity to the pause control mechanism allows governance to pause individual actions on specific markets, which reduces impact on the protocol as a whole. This is particularly useful when applied to isolated pools.
The goal of Governance is to increase governance efficiency, while mitigating and eliminating malicious or erroneous proposals.
Details
Governance has 3 main contracts: GovernanceBravoDelegate, XVSVault, XVS token.
XVS token is the protocol token used for protocol users to cast their vote on submitted proposals.
XVSVault is the main staking contract for XVS. Users first stake their XVS in the vault and receive voting power proportional to their staked tokens that they can use to vote on proposals. Users also can choose to delegate their voting power to other users.
Governor Bravo
GovernanceBravoDelegate
is main Venus Governance contract. Users interact with it to:
Submit new proposal
Vote on a proposal
Cancel a proposal
Queue a proposal for execution with a timelock executor contract.
GovernanceBravoDelegate
uses the XVSVault to get restrict certain actions based on a user's voting power. The governance rules it inforces are:
A user's voting power must be greater than the
proposalThreshold
to submit a proposalIf a user's voting power drops below certain amount, anyone can cancel the the proposal. The governance guardian and proposal creator can also cancel a proposal at anytime before it is queued for execution.
Venus Improvement Proposal
Venus Governance allows for Venus Improvement Proposals (VIPs) to be categorized based on their impact and risk levels. This allows for optimizing proposals execution to allow for things such as expediting interest rate changes and quickly updating risk parameters, while moving slower on other types of proposals that can prevent a larger risk to the protocol and are not urgent. There are three different types of VIPs with different proposal paramters:
NORMAL
FASTTRACK
CRITICAL
When initializing the GovernorBravo
contract, the parameters for the three routes are set. The parameters are:
votingDelay
: The delay in blocks between submitting a proposal and when voting beginsvotingPeriod
: The number of blocks where voting will be openproposalThreshold
: The number of votes required in order submit a proposal
There is also a separate timelock executor contract for each route, which is used to dispatch the VIP for execution, giving even more control over the flow of each type of VIP.
Voting
After a VIP is proposed, voting is opened after the votingDelay
has passed. For example, if votingDelay = 0
, then voting will begin in the next block after the proposal has been submitted. After the delay, the proposal state is ACTIVE
and users can cast their vote for
, against
, or abstain
, weighted by their total voting power (tokens + delegated voting power). Abstaining from a voting allows for a vote to be cast and optionally include a comment, without the incrementing for or against vote count. The total voting power for the user is obtained by calling XVSVault's getPriorVotes
.
GovernorBravoDelegate
also accepts EIP-712 signatures for voting on proposals via the external function castVoteBySig
.
Delegating
A users voting power includes the amount of staked XVS the have staked as well as the votes delegate to them. Delegating is the process of a user loaning their voting power to another, so that the latter has the combined voting power of both users. This is an important feature because it allows for a user to let another user who they trust propose or vote in their place.
The delegation of votes happens through the XVSVault
contract by calling the delegate
or delegateBySig
functions. These same functions can revert vote delegation by calling the same function with a value of 0
.
Solidity API
initialize
Used to initialize the contract during delegator contructor
Parameters
Name | Type | Description |
---|---|---|
xvsVault_ | address | The address of the XvsVault |
proposalConfigs_ | struct GovernorBravoDelegateStorageV2.ProposalConfig[] | Governance configs for each governance route |
timelocks | contract TimelockInterface[] | Timelock addresses for each governance route |
guardian_ | address |
propose
Function used to propose a new proposal. Sender must have delegates above the proposal threshold. targets, values, signatures, and calldatas must be of equal length
Parameters
Name | Type | Description |
---|---|---|
targets | address[] | Target addresses for proposal calls |
values | uint256[] | BNB values for proposal calls |
signatures | string[] | Function signatures for proposal calls |
calldatas | bytes[] | Calldatas for proposal calls |
description | string | String description of the proposal |
proposalType | enum GovernorBravoDelegateStorageV2.ProposalType | the type of the proposal (e.g NORMAL, FASTTRACK, CRITICAL) |
Return Values
Name | Type | Description |
---|---|---|
[0] | uint256 | Proposal id of new proposal |
queue
Queues a proposal of state succeeded
Parameters
Name | Type | Description |
---|---|---|
proposalId | uint256 | The id of the proposal to queue |
execute
Executes a queued proposal if eta has passed
Parameters
Name | Type | Description |
---|---|---|
proposalId | uint256 | The id of the proposal to execute |
cancel
Cancels a proposal only if sender is the proposer, or proposer delegates dropped below proposal threshold
Parameters
Name | Type | Description |
---|---|---|
proposalId | uint256 | The id of the proposal to cancel |
getActions
Gets actions of a proposal
Parameters
Name | Type | Description |
---|---|---|
proposalId | uint256 | the id of the proposal |
Return Values
Name | Type | Description |
---|---|---|
targets | address[] | |
values | uint256[] | |
signatures | string[] | |
calldatas | bytes[] |
getReceipt
Gets the receipt for a voter on a given proposal
Parameters
Name | Type | Description |
---|---|---|
proposalId | uint256 | the id of proposal |
voter | address | The address of the voter |
Return Values
Name | Type | Description |
---|---|---|
[0] | struct GovernorBravoDelegateStorageV1.Receipt | The voting receipt |
state
Gets the state of a proposal
Parameters
Name | Type | Description |
---|---|---|
proposalId | uint256 | The id of the proposal |
Return Values
Name | Type | Description |
---|---|---|
[0] | enum GovernorBravoDelegateStorageV1.ProposalState | Proposal state |
castVote
Cast a vote for a proposal
Parameters
Name | Type | Description |
---|---|---|
proposalId | uint256 | The id of the proposal to vote on |
support | uint8 | The support value for the vote. 0=against, 1=for, 2=abstain |
castVoteWithReason
Cast a vote for a proposal with a reason
Parameters
Name | Type | Description |
---|---|---|
proposalId | uint256 | The id of the proposal to vote on |
support | uint8 | The support value for the vote. 0=against, 1=for, 2=abstain |
reason | string | The reason given for the vote by the voter |
castVoteBySig
Cast a vote for a proposal by signature
Parameters
Name | Type | Description |
---|---|---|
proposalId | uint256 | The id of the proposal to vote on |
support | uint8 | The support value for the vote. 0=against, 1=for, 2=abstain |
v | uint8 | recovery id of ECDSA signature |
r | bytes32 | part of the ECDSA sig output |
s | bytes32 | part of the ECDSA sig output |
_setGuardian
Sets the new governance guardian
Parameters
Name | Type | Description |
---|---|---|
newGuardian | address | the address of the new guardian |
_initiate
Initiate the GovernorBravo contract
Parameters
Name | Type | Description |
---|---|---|
governorAlpha | address | The address for the Governor to continue the proposal id count from |
_setProposalMaxOperations
Set max proposal operations
Parameters
Name | Type | Description |
---|---|---|
proposalMaxOperations_ | uint256 | Max proposal operations |
_setPendingAdmin
Begins transfer of admin rights. The newPendingAdmin must call _acceptAdmin
to finalize the transfer.
Parameters
Name | Type | Description |
---|---|---|
newPendingAdmin | address | New pending admin. |
_acceptAdmin
Accepts transfer of admin rights. msg.sender must be pendingAdmin
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