Crypto Chronic

CertiK29 Jun 2023Files named in the report

Audit

CertiK reviewed CryptoChronic (Crypto Chronic) on 29 Jun 2023: 8 findings, 0 critical; 2 marked fixed, 6 acknowledged.

No open critical findings

Open the report Open CryptoChronic’s security record

Report hosted on skynet.certik.com.

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Findings8

Statuses are the security firm’s own, from its report.

Severity	Acknowledged	Fixed
Critical	0	0
High	1	0
Medium	0	0
Low	5	2

LowMissing Error MessagesFixed

The **require** can be used to check for conditions and throw an exception if the condition is not met. It is better to provide a string message containing details about the error that will be passed back to the caller.

LowUsage of `transfer`/`send` for sending EtherFixed

It is not recommended to use Solidity's `transfer()` and `send()` functions for transferring Ether, since some contracts may not be able to receive the funds. Those functions forward only a fixed amount of gas (2300 specifically) and the receiving contracts may run out of gas before finishing the transfer. Also, EVM instructions' gas costs may increase in the future. Thus, some contracts that can receive now may stop working in the future due to the gas limitation. ```solidity=685 to.transfer(balance); ``` - `Breeder.withdraw` uses `transfer()`. --- ```solidity=482 to.transfer(balance); ``` - `Feeder.withdraw` uses `transfer()`.