Strategyx Token

Smart Contract Audit Report

Audit Summary

Strategyx Finance is building a new ERC-20 token and a token vesting mechanism on Fantom.

For this audit, we reviewed the project team's STAYToken contract at 0xA5365f2E77bCe1cb2D42F5c808012C01b1548d3C on the Fantom Mainnet.

Audit Findings

All findings have been resolved.
Date: June 28th, 2022.
Updated: June 29th, 2022 to reflect the contract's new mainnet address that resolves Finding #1.

Finding #1 - STAYToken - High (Resolved)

Description: Any assigned Minter address can use the burn() function to burn any account's tokens without an allowance.

function burn(address _from, uint256 _amount) external onlyMinter {
	_burn(_from, _amount);
}

Risk/Impact: The team can burn any user's tokens at any time.
Recommendation: The team should modify the burn() function to enforce that the owner can only burn their own tokens or tokens that they have an approval for.
Resolution: The team has removed the burn() function from the contract.

Contracts Overview

STAYToken Contract:

• The total supply of the token is set to 1 billion $STAY [1,000,000,000].
• No mint or burn functions are present, though the circulating supply can be decreased by sending tokens to the 0x..dead address.
• At the time of writing this report, there are 15 total token holders. The token allocation is as follows:
  • 69.98% of the total supply belongs to the team's upgradeable Farm contract.
  • 10.16% of the total supply belongs to the team's unverified DAO contract.
  • 9.85% of the total supply is in SpookySwap liquidity.
  • Of that liquidity, 100% of the LP tokens are stored in the LiquidityLock contract.
  • 5% of the total supply belongs to the team's unverified Partner Lock contract.
  • 2% of the total supply belongs to the team's unverified Ad Lock contract.
  • 2% of the total supply belongs to the team's unverified Team Lock contract.
  
  
• There are no fees associated with transferring tokens.
• As the contract is deployed with Solidity v0.8.0, it is protected from overflows/underflows.
• The contract complies with the ERC-20 token standard.

TokenVesting Contract:

• This contract is used to lock tokens for a specified period of time and vest them to a single beneficiary.
• Three TokenVesting contracts were created upon initialization of the STAYToken contract that were each assigned a unique cliff time and duration.
• The deployer of the STAYToken contract is set as the beneficiary for each contract.
• Any user can begin releasing tokens to the beneficiary once the cliff time of the contract has passed by specifying a token address.
• The beneficiary will receive 100% of the tokens after the duration time has passed.
• If the duration time has not passed and the beneficiary releases tokens, the number of tokens the beneficiary will receive is proportional to the amount of time that has passed in the vesting schedule.
• Any user can begin releasing tokens from the Ad Lock contract at any time. 100% of the tokens can be released after 365 days.
• Any user can begin releasing tokens from the Partner Lock contract at any time. 100% of the tokens can be released after 90 days.
• Any user can begin releasing tokens from the Team Lock contract after 1 month. 100% of the tokens can be released after 36 months.

Audit Results

Inheritance Chart

Function Graph

Functions Overview

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

 +  Initializable 
    - [Prv] isConstructor

 +  Context (Initializable)
    - [Int] __Context_init #
       - modifiers: initializer
    - [Int] __Context_init_unchained #
       - modifiers: initializer
    - [Int] _msgSender
    - [Int] _msgData

 +  Ownable (Initializable, Context)
    - [Int] __Ownable_init #
       - modifiers: initializer
    - [Int] __Ownable_init_unchained #
       - modifiers: initializer
    - [Pub] owner
    - [Pub] renounceOwnership #
       - modifiers: onlyOwner
    - [Pub] transferOwnership #
       - modifiers: onlyOwner

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

 + [Lib] SafeMath 
    - [Int] add
    - [Int] sub
    - [Int] sub
    - [Int] mul
    - [Int] div
    - [Int] div
    - [Int] mod
    - [Int] mod

 +  ERC20 (Initializable, Context, IERC20)
    - [Int] __ERC20_init #
       - modifiers: initializer
    - [Int] __ERC20_init_unchained #
       - modifiers: initializer
    - [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] _setupDecimals #
    - [Int] _beforeTokenTransfer #

 + [Lib] SafeERC20 
    - [Int] _safeApprove #
    - [Int] safeApprove #
    - [Int] safeTransfer #
    - [Int] safeTransferFrom #
    - [Int] safeTransferETH #

 +  TokenVesting 
    - [Pub]  #
    - [Pub] release #
    - [Pub] releasableAmount
    - [Pub] vestedAmount

 +  STAYToken (ERC20, Ownable)
    - [Pub] initialize #
       - modifiers: initializer
    - [Pub] initFarm #
       - modifiers: onlyOwner
    - [Ext] addMinter #
       - modifiers: onlyOwner
    - [Ext] setMinter #
       - modifiers: onlyOwner
    - [Ext] mint #
       - modifiers: onlyMinter
    - [Ext] burn #
       - modifiers: onlyMinter

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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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