Project overview - Flasko

Type ERC20/BEP20
Language Solidity
Request date 2022/08/31
Latest Revision date In progress


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Audit Summary

Static analysis Dynamic analysis Symbolic Execution SWC check
Network Ethereum Mainnet
License & Compiler MIT / v0.8.15+commit.e14f2714
Contract address 0x1B8EAcf3D0f1B151925b1686b8ce089ae050e3b8
Critical issues found The contract does contain issues of high or medium criticality.
Contract owner cannot mint It's not possible to mint new tokens.
Contract owner cannot blacklist addresses. It's not possible to lock user funds by blacklisting addresses.
Contract owner cannot set fees above 25%/nearly 100%. Contract owner unable to set fees above 25% or nearly to 100%.
Token transfer can be locked Owner can lock user funds with owner functions.
Token cannot be burned There is no burn function within the contract.
Ownership is not renounced Contract can be manipulated by owner functions.
No Issues found.
No Issues found.
1 Issue found. 0 resolved.
3 Issues found. 0 resolved.
2 Issues found. 0 resolved.
1 Issue found. 0 resolved.

  • Owner can lock user funds by setting "maxTxAmount" to 0
  • liquidity will be added to the owner address
  • Tokens will be burned while transferring but only if the contract take fees from the sender

Audit Scope

This audit covered the following files listed below with a SHA-1 Hash. The above token Team provided us with the files that needs to be tested.

We will verify the following claims:
  • Correct implementation of Token standard
  • Deployer cannot mint any new tokens
  • Deployer cannot burn or lock user funds
  • Deployer cannot pause the contract
  • Overall checkup (Smart Contract Security)
The auditing process follows a routine series of steps:
  • Review of the specifications, sources, and instructions provided to SolidProof to make sure we understand the size, scope, and functionality of the smart contract.
  • Manual review of code, which is the process of reading source code line-by-line in an attempt to identify potential vulnerabilities.
  • Comparison to specification, which is the process of checking whether the code does what the specifications, sources, and instructions provided to SolidProof describe.
  • Test coverage analysis, which is the process of determining whether the test cases are actually covering the code and how much code is exercised when we run those test cases.
  • Symbolic execution, which is analysing a program to determine what inputs causes each part of a program to execute.
  • Best practices review, which is a review of the smart contracts to improve efficiency, effectiveness, clarify, maintainability, security, and control based on the established industry and academic practices, recommendations, and research.
  • Specific, itemized, actionable recommendations to help you take steps to secure your smart contracts.

A file with a different Hash has been modified, intentionally or otherwise, after the security review. A different Hash could be (but not necessarily) an indication of a changed condition or potential vulnerability that was not within the scope of this review.

Public functions Public state variables Total lines of code Capabilities
90 15 732

Public functions Public state variables Total lines of code Capabilities
90 15 732

Audit details

Throughout the review process, care was taken to evaluate the repository for security-related issues, code quality, and adherence to speciïŹcation and best practices. To do so, reviewed line-by-line by our team of expert pentesters and smart contract developers, documenting any issues as there were discovered.

Risk represents the probability that a certain source-threat will exploit vulnerability, and the impact of that event on the organization or system. Risk Level is computed based on CVSS version 3.0.

#3 | State variables shadowing (shadowing-state)
Severity Location Status
Medium Flasko.sol: 444 Pending

Remove the state variable shadowing.

#1 | Missing Events Arithmetic (events-maths)
Severity Location Status
Low Flasko.sol: 512-515, 525-528, 628-637, 639-648 Pending

Emit an event for critical parameter changes.

#2 | Missing Zero Address Validation (missing-zero-check)
Severity Location Status
Low Flasko.sol: 500 Pending

Check that the address is not zero.

#3 | Visibility is missing
Severity Location Status
Low Flasko.sol: 420 Pending

Visibility of state variable is missing. Please add explicitly a visibility.

#1 | Functions that are not used (dead-code)
Severity Location Status
Informational Flasko.sol: 140-146, 167-178, 161-166, 153-155, 157-159 Pending

Remove unused functions.

#6 | Wrong comment
Severity Location Status
Informational Flasko.sol: 719 Pending

"Can't withdraw negative or zero" comment is wrong. An uint256 cannot be negative.

#1 | Public function that could be declared external (external-function)
Severity Location Status
Optimization Flasko.sol: 98-101, 107-111, 126-128, 129-131, 132-134, 469-471, 475-478, 479-481, 482-485, 486-490, 491-494, 495-498, 507-510, 516-518, 520-522, 628-637, 639-648 Pending

Use the `external` attribute for functions never called from the contract.


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