Afluenta

Smart Contract Audit Report

Audit Summary

Afluenta is building a new ERC-20 token.

For this audit, we reviewed the project team's AFLToken contract at commit de0f6a3add1e7de12562ae774d7d2cfa96c34e0f on the team's private GitHub repository.

Audit Findings

Please ensure trust in the team prior to investing as they can mint tokens at any time.
Date: April 4th, 2022.

Contract Overview

• The initial supply of the token will be set upon deployment and minted to the owner.
• The contract utilizes a Minter role. The assigned addresses can mint any number of tokens to any address at any time.
• Any user can burn their own tokens to reduce the total supply.
• Any user can burn tokens on another user's behalf if an allowance has been granted.
• There was no token allocation for our team to analyze as the contract has yet to be deployed to the mainnet.


• The contract utilizes a Pauser role. The assigned addresses can pause the contract at any time which will prevent all transfers, minting, and burning from occurring.
• There are no fees associated with transferring tokens.
• As the contract is implemented with Solidity v0.8.x, it is protected from overflows/underflows.
• The contract complies with the ERC-20 token standard.

Audit Results

Inheritance Chart

Function Graph

Functions Overview

 ($) = payable function
 # = non-constant function
 
 Int = Internal
 Ext = External
 Pub = Public

 + [Int] IERC20 
    - [Ext] totalSupplyyyy
    - [Ext] balanceOf
    - [Ext] transfer #
    - [Ext] allowance
    - [Ext] approve #
    - [Ext] transferFrom #

 + [Int] IERC20Metadata (IERC20)
    - [Ext] name
    - [Ext] symbol
    - [Ext] decimals

 +  Context 
    - [Int] _msgSender
    - [Int] _msgData

 +  ERC20 (Context, IERC20, IERC20Metadata)
    - [Pub]  #
    - [Pub] name
    - [Pub] symbol
    - [Pub] decimals
    - [Pub] totalSupply
    - [Pub] balanceOf
    - [Pub] transfer #
    - [Pub] allowance
    - [Pub] approve #
    - [Pub] transferFrom #
    - [Pub] increaseAllowance #
    - [Pub] decreaseAllowance #
    - [Int] _transfer #
    - [Int] _mint #
    - [Int] _burn #
    - [Int] _approve #
    - [Int] _spendAllowance #
    - [Int] _beforeTokenTransfer #
    - [Int] _afterTokenTransfer #

 +  ERC20Burnable (Context, ERC20)
    - [Pub] burn #
    - [Pub] burnFrom #

 +  Pausable (Context)
    - [Pub]  #
    - [Pub] paused
    - [Int] _pause #
       - modifiers: whenNotPaused
    - [Int] _unpause #
       - modifiers: whenPaused

 +  ERC20Pausable (ERC20, Pausable)
    - [Int] _beforeTokenTransfer #

 + [Int] IAccessControl 
    - [Ext] hasRole
    - [Ext] getRoleAdmin
    - [Ext] grantRole #
    - [Ext] revokeRole #
    - [Ext] renounceRole #

 + [Int] IAccessControlEnumerable (IAccessControl)
    - [Ext] getRoleMember
    - [Ext] getRoleMemberCount

 + [Lib] Strings 
    - [Int] toString
    - [Int] toHexString
    - [Int] toHexString

 + [Int] IERC165 
    - [Ext] supportsInterface

 +  ERC165 (IERC165)
    - [Pub] supportsInterface

 +  AccessControl (Context, IAccessControl, ERC165)
    - [Pub] supportsInterface
    - [Pub] hasRole
    - [Int] _checkRole
    - [Int] _checkRole
    - [Pub] getRoleAdmin
    - [Pub] grantRole #
       - modifiers: onlyRole
    - [Pub] revokeRole #
       - modifiers: onlyRole
    - [Pub] renounceRole #
    - [Int] _setupRole #
    - [Int] _setRoleAdmin #
    - [Int] _grantRole #
    - [Int] _revokeRole #

 + [Lib] EnumerableSet 
    - [Prv] _add #
    - [Prv] _remove #
    - [Prv] _contains
    - [Prv] _length
    - [Prv] _at
    - [Prv] _values
    - [Int] add #
    - [Int] remove #
    - [Int] contains
    - [Int] length
    - [Int] at
    - [Int] values
    - [Int] add #
    - [Int] remove #
    - [Int] contains
    - [Int] length
    - [Int] at
    - [Int] values
    - [Int] add #
    - [Int] remove #
    - [Int] contains
    - [Int] length
    - [Int] at
    - [Int] values

 +  AccessControlEnumerable (IAccessControlEnumerable, AccessControl)
    - [Pub] supportsInterface
    - [Pub] getRoleMember
    - [Pub] getRoleMemberCount
    - [Int] _grantRole #
    - [Int] _revokeRole #

 +  ERC20PresetMinterPauser (Context, AccessControlEnumerable, ERC20Burnable, ERC20Pausable)
    - [Pub]  #
       - modifiers: ERC20
    - [Pub] mint #
    - [Pub] pause #
    - [Pub] unpause #
    - [Int] _beforeTokenTransfer #

 +  AFLToken (ERC20PresetMinterPauser)
    - [Pub]  #
       - modifiers: ERC20PresetMinterPauser

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What is a SourceHat Audit?

Typically, a smart contract audit is a comprehensive review process designed to discover logical errors, security vulnerabilities, and optimization opportunities within code. A SourceHat Audit takes this a step further by verifying economic logic to ensure the stability of smart contracts and highlighting privileged functionality to create a report that is easy to understand for developers and community members alike.

How Do I Interpret the Findings?

Each of our Findings will be labeled with a Severity level. We always recommend the team resolve High, Medium, and Low severity findings prior to deploying the code to the mainnet. Here is a breakdown on what each Severity level means for the project:

• High severity indicates that the issue puts a large number of users' funds at risk and has a high probability of exploitation, or the smart contract contains serious logical issues which can prevent the code from operating as intended.
• Medium severity issues are those which place at least some users' funds at risk and has a medium to high probability of exploitation.
• Low severity issues have a relatively minor risk association; these issues have a low probability of occurring or may have a minimal impact.
• Informational issues pose no immediate risk, but inform the project team of opportunities for gas optimizations and following smart contract security best practices.

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