You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
147 lines
4.8 KiB
147 lines
4.8 KiB
//////////////////////////////////////////////////////////////////////////////
|
|
///////////////////// Governor.sol base definitions //////////////////////////
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
methods {
|
|
proposalSnapshot(uint256) returns uint256 envfree // matches proposalVoteStart
|
|
proposalDeadline(uint256) returns uint256 envfree
|
|
hashProposal(address[],uint256[],bytes[],bytes32) returns uint256 envfree
|
|
isExecuted(uint256) returns bool envfree
|
|
isCanceled(uint256) returns bool envfree
|
|
execute(address[], uint256[], bytes[], bytes32) returns uint256
|
|
// initialized(uint256) returns bool envfree
|
|
|
|
hasVoted(uint256, address) returns bool
|
|
|
|
castVote(uint256, uint8) returns uint256
|
|
|
|
// internal functions made public in harness:
|
|
_quorumReached(uint256) returns bool envfree
|
|
_voteSucceeded(uint256) returns bool envfree
|
|
|
|
}
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
////////////////////////////// INVARIANTS ////////////////////////////////////
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
|
|
|
|
/*
|
|
* A proposal cannot end unless it started.
|
|
*/
|
|
invariant voteStartBeforeVoteEnd(uint256 pId)
|
|
(proposalSnapshot(pId) > 0 => proposalSnapshot(pId) < proposalDeadline(pId))
|
|
&& (proposalSnapshot(pId) == 0 => proposalDeadline(pId) == 0)
|
|
|
|
|
|
/*
|
|
* A proposal cannot be both executed and canceled.
|
|
*/
|
|
invariant noBothExecutedAndCanceled(uint256 pId)
|
|
!isExecuted(pId) || !isCanceled(pId)
|
|
|
|
|
|
/*
|
|
* A proposal cannot be neither executed nor canceled before it starts
|
|
*/
|
|
invariant noExecuteOrCancelBeforeStarting(env e, uint256 pId)
|
|
e.block.number < proposalSnapshot(pId)
|
|
=> !isExecuted(pId) && !isCanceled(pId)
|
|
|
|
|
|
/*
|
|
* A proposal could be executed only if quorum was reached and vote succeeded
|
|
*/
|
|
invariant executionOnlyIfQuoromReachedAndVoteSucceeded(uint256 pId)
|
|
isExecuted(pId) => _quorumReached(pId) && _voteSucceeded(pId)
|
|
|
|
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
/////////////////////////////////// RULES ////////////////////////////////////
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
|
|
/*
|
|
* The voting must start not before the proposal’s creation time
|
|
*/
|
|
rule noStartBeforeCreation(uint256 pId) {
|
|
uint previousStart = proposalSnapshot(pId);
|
|
require previousStart == 0;
|
|
env e;
|
|
calldataarg arg;
|
|
propose(e, arg);
|
|
|
|
uint newStart = proposalSnapshot(pId);
|
|
// if created, start is after creation
|
|
assert(newStart != 0 => newStart >= e.block.number);
|
|
}
|
|
|
|
|
|
/*
|
|
* Once a proposal is created, voteStart and voteEnd are immutable
|
|
*/
|
|
rule immutableFieldsAfterProposalCreation(uint256 pId, method f) {
|
|
uint _voteStart = proposalSnapshot(pId);
|
|
uint _voteEnd = proposalDeadline(pId);
|
|
require _voteStart > 0; // proposal was created
|
|
|
|
env e;
|
|
calldataarg arg;
|
|
f(e, arg);
|
|
|
|
uint voteStart_ = proposalSnapshot(pId);
|
|
uint voteEnd_ = proposalDeadline(pId);
|
|
assert _voteStart == voteStart_;
|
|
assert _voteEnd == voteEnd_;
|
|
}
|
|
|
|
|
|
/*
|
|
* A user cannot vote twice
|
|
*/
|
|
rule doubleVoting(uint256 pId, uint8 sup) {
|
|
env e;
|
|
address user = e.msg.sender;
|
|
|
|
bool votedCheck = hasVoted(e, pId, user);
|
|
require votedCheck == true;
|
|
|
|
castVote@withrevert(e, pId, sup);
|
|
bool reverted = lastReverted;
|
|
|
|
assert votedCheck => reverted, "double voting accured";
|
|
}
|
|
|
|
|
|
/*
|
|
* When a proposal is created the start and end date are created in the future.
|
|
*/
|
|
rule proposalCreatedStartAndEndDateInFuture(address[] targets, uint256[] values, bytes[] calldatas){
|
|
env e;
|
|
uint256 pId = callPropose(e, targets, values, calldatas);
|
|
uint256 startDate = proposalSnapshot(pId);
|
|
uint256 endDate = proposalDeadline(pId);
|
|
assert(startDate >= e.block.number && endDate >= e.block.number, "Start or end date were set in the past");
|
|
}
|
|
|
|
|
|
/**
|
|
* Check hashProposal hashing is reliable (different inputs lead to different buffers hashed)
|
|
*/
|
|
/*
|
|
rule checkHashProposal {
|
|
address[] t1;
|
|
address[] t2;
|
|
uint256[] v1;
|
|
uint256[] v2;
|
|
bytes[] c1;
|
|
bytes[] c2;
|
|
bytes32 d1;
|
|
bytes32 d2;
|
|
|
|
uint256 h1 = hashProposal(t1,v1,c1,d1);
|
|
uint256 h2 = hashProposal(t2,v2,c2,d2);
|
|
bool equalHashes = h1 == h2;
|
|
assert equalHashes => t1.length == t2.length;
|
|
assert equalHashes => v1.length == v2.length;
|
|
assert equalHashes => c1.length == c2.length;
|
|
assert equalHashes => d1 == d2;
|
|
}
|
|
*/
|
|
|