modifier isDisaster(uint256 marketIndex, uint256 epochEnd) {
        address[] memory vaultsAddress = vaultFactory.getVaults(marketIndex);
        if(
            vaultsAddress.length != VAULTS_LENGTH
            )
            revert MarketDoesNotExist(marketIndex);

        address vaultAddress = vaultsAddress[0];
        Vault vault = Vault(vaultAddress);

        if(vault.idExists(epochEnd) == false)
            revert EpochNotExist();

        if(
            vault.strikePrice() < getLatestPrice(vault.tokenInsured())
            )
            revert PriceNotAtStrikePrice(getLatestPrice(vault.tokenInsured()));

        if(
            vault.idEpochBegin(epochEnd) > block.timestamp)
            revert EpochNotStarted();

        if(
            block.timestamp > epochEnd
            )
            revert EpochExpired();
        _;
    }
        if(
            vault.strikePrice() < getLatestPrice(vault.tokenInsured())
            )
            revert PriceNotAtStrikePrice(getLatestPrice(vault.tokenInsured()));
if(
            vault.strikePrice() <= getLatestPrice(vault.tokenInsured())
            )
            revert PriceNotAtStrikePrice(getLatestPrice(vault.tokenInsured()));
