Worldbit Logo

Worldbit Token Sale Smart Contract Audit

Reading Time: 6 minutes

CoinFabrik’s Smart Contract Audit team audited WorldBit Token sale ICO’s smart contracts. The contracts audited are taken from the WorldBit repository on The audit is based on the commit 445cc0c28894a85cb58f54631666deafdd35d859, and updated to reflect changes on 21abcc3bde6d64d4aee391544fc9332fc9f2749d. Summary The audited contracts are: ERC20Basic: non-approval half of ERC20 interface. ERC20: Full ERC20 interface. FractionalERC20: Full ERC20 interface […]

Realisto Token Logo

Realisto Token Sale Smart Contract Audit

Reading Time: 5 minutes

By Ismael Bejarano and Pablo Yabo Coinfabrik smart contract audit’s team was hired to review the contracts for the Realisto’s ICO or token sale. We audited the contracts from repository at commit b8f68bd4330f4852260636c00013794ffec1c6a7. In the next section, we provide a short summary of the contracts and our discoveries. After that, we present our detailed […]

Flixxo Token

Flixxo Token Sale Security Audit

Reading Time: 6 minutes

Coinfabrik’s smart contracts auditing team was asked to audit the contracts for the Flixxo Token sale. In the first part, we will give a summary of our discoveries and then the details of our findings.
The audited contracts are in Flixxo repository on The audit is based on the commit 739f8dda4fdeffb65a6631ed9d86a42233085cd3, and updated to reflect changes at a2e9ba2cd1953a886c4e367b672cab34f8dede08

Lif Token

Líf Token Smart Contract Audit

Reading Time: 9 minutes

By Pablo Yabo and Ismael Bejarano Introduction CoinFabrik’s smart contract audit team was requested to review contracts of the Líf Token for the Winding Tree platform. In the following sections, we will write the discoveries of this process. The contracts audited are from the repository, the audit was started at commit fa503ebe495b7ec11d19333731b1f506e897929b, and completed […]

REAL token

Smart Contract Audit: REAL Estate Crypto Token

Reading Time: 4 minutes

By Sergio Demian Lerner Executive Summary In August 2017, REAL engaged Coinfabrik smart contract audit team to perform a security audit of the REAL crowdsale smart contracts. The purpose of the audit was to evaluate the security of the smart contracts. The source code was retrieved by Coinfabrik from commit e8af021445785ad0e36c54adf6568b079ec6293d on August 11th […]

Smart Contract Short Address Attack Mitigation Failure

Reading Time: 3 minutes

Overview Our  smart contract audit team found that Short Address Attack mitigations can cause several problems with smart contracts. A Short Address Attack is when a contract receives less data than it was expecting, and Solidity fills the missing bytes with zeros. The deployed smart contract cannot prevent this and will interpret those extra zeros as […]

Security Auditing: Beware of Duplicated Storage in Solidity Smart Contract Development

Reading Time: 2 minutes

Solidity semantics are confusing for smart contract developers with experience in traditional programming languages. This semantics can lead to security issues like the one we found in a recent smart contract security audit we did. The following code caught our attention: In the above code, the create method stores the same information in two different […]

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Security Audit for Patientory (PTOY) Token ICO

Reading Time: 3 minutes

CoinFabrik smart contract audit‘s team was hired to audit contracts written by TokenMarket for the PTOY Token ICO. The result of this security review is reflected in this document. Audited Files The contracts we audited are hosted at Github repository: MintableToken.sol CrowdsaleToken.sol ReleasableToken.sol UpgradeableToken.sol Commit hash f968cffe1abf4a3d96d6705ec1befd6cfec13ae3. Vulnerabilities Found Short Address Attack The version reviewed […]

Comparison of Cryptocurrency Developments

Reading Time: 3 minutes

Working for our customers in our blockchain development company we built this spreadsheet which is a work in progress, comments are welcome here, which describes the features of multiple blockchain and sidechain technologies. Views about blockchain technologies range from hype to skepticism. A blockchain is a distributed database and consensus network that can be used to […]