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chore: add cerora rules for `stakeSupply` ghost rule

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Nurit Dor 2024-01-24 12:16:01 +01:00 committed by r4bbit
parent 4f2f6d3a75
commit a0585d98e2
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certora/specs/StakeManager.spec
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@ -1,6 +1,7 @@
using ERC20A as staked;
methods {
function staked.balanceOf(address) external returns (uint256) envfree;
function stakeSupply() external returns (uint256) envfree;
}
function isMigrationfunction(method f) returns bool {
@ -15,6 +16,17 @@ function simplification() {
require currentContract.migration == 0;
}
ghost mathint sumOfBalances /* sigma account[u].balance forall u */ {
init_state axiom sumOfBalances == 0;
}
hook Sstore accounts[KEY address addr].balance uint256 newValue (uint256 oldValue) STORAGE {
sumOfBalances = sumOfBalances - oldValue + newValue;
}
invariant sumOfBalancesIsStakeSupply()
sumOfBalances == to_mathint(stakeSupply());
rule reachability(method f)
{