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Merge branch 'certora/erc20' of github.com:Certora/openzeppelin-contracts into remotes/origin/certora/erc20

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This commit is contained in:
Nick Armstrong
2022-03-25 12:57:21 -07:00
parent 6895946f41 5153c462d5
commit 140f019155
2 changed files with 15 additions and 11 deletions
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12
certora/specs/ERC20FlashMint.spec
View File

@ -1,7 +1,7 @@
import "erc20.spec"
methods {
onFlashLoan(address, address, uint256, uint256, bytes) => HAVOC_ALL // HAVOC_ECF
onFlashLoan(address, address, uint256, uint256, bytes) => HAVOC_ALL
_burn(address account, uint256 amount) returns(bool) => specBurn(account, amount);
}
@ -13,19 +13,11 @@ function specBurn(address account, uint256 amount) returns bool { // retuns ne
return true;
}
// ghost to save args that were passed to burn function
// summarize burn
// assert ghost == amount + fee
// STATUS - in progress
// HAVOC_ALL - everything is havoced => violation
// HAVOC_ECF - verified
// https://vaas-stg.certora.com/output/3106/8795450b626f2ca53a2b/?anonymousKey=dd774da10cc595e4e38357af9e4f50bf2c0cb02a
// STATUS - verified
// fee + flashLoan amount is burned
rule letsWatchItBurns(env e){
address receiver; address token; uint256 amount; bytes data;
require amount > 0;
uint256 feeBefore = flashFee(e, token, amount);

14
certora/specs/ERC20Wrapper.spec
View File

@ -12,7 +12,7 @@ methods {
// STATUS - verified
// totalsupply of wrapped should be less than or equal to underlying (assuming no transfer they should be equal) - solvency
// totalsupply of wrapped should be less than or equal to underlying (assuming no external transfer) - solvency
invariant whatAboutTotal(env e)
totalSupply(e) <= underlyingTotalSupply()
filtered { f -> f.selector != certorafallback_0().selector }
@ -29,6 +29,18 @@ invariant whatAboutTotal(env e)
}
// STATUS - in progress
// https://vaas-stg.certora.com/output/3106/a5f4943cd2987dccab94/?anonymousKey=9428fb1588845c0222c2abe5b00dedd59c925870
// totalsupply of wrapped should be less than or equal to the underlying balanceOf contract (assuming no external transfer) - solvency
invariant underTotalAndContractBalanceOfCorrelation(env e)
totalSupply(e) <= underlyingBalanceOf(currentContract)
{
preserved {
require underlying() != currentContract;
}
}
// STATUS - verified
// check correct values update by depositFor()
rule depositForSpecBasic(env e){