ArtemisX
Smart Contract Audit Report
Audit Summary
ArtemisX is a new BEP-20 token on the Binance Smart Chain with an elastic supply that performs automatic liquidity adds and pays dividends to holders in BUSD.
For this audit, we reviewed the project team's ArtemisX contract and DividendDistributor contract at 0xB45f305ACAf7beC63E30c669737ed8E7aA4C1d33 on the Binance Smart Chain Mainnet.
Audit Findings
Please ensure trust in the team prior to investing as they have substantial control in the ecosystem.
Date: April 18th, 2022.Finding #1 - ArtemisX - Informational
Description: There are four instances in the takeFee() function where multiplication is performed on the result of a division. Division can lead to integer truncation, therefore dividing and subsequently multiplying can cause results to lose precision and become less accurate.Recommendation: We recommend modifying these calculations to perform all multiplication before division.uint256 feeAmount = gonAmount.div(feeDenominator).mul(_totalFee); _gonBalances[autofirePit] = _gonBalances[autofirePit].add( gonAmount.div(feeDenominator).mul(autofirePitFee) ); _gonBalances[address(this)] = _gonBalances[address(this)].add( gonAmount.div(feeDenominator).mul(_treasuryFee.add(safuDividendFee)) ); _gonBalances[autoLiquidityReceiver] = _gonBalances[autoLiquidityReceiver].add( gonAmount.div(feeDenominator).mul(liquidityFee) );
Finding #2 - ArtemisX - Informational
Description: Several state variables can never be modified, but are not declared constant.Recommendation: These state variables should be declared constant for additional gas savings on each call.DEAD, ZERO, autofirePitFee, feeDenominator, liquidityFee, safuDividendFee, swapEnabled, treasuryFee
Contract Overview
- The initial supply of the token is set to 325,000 $ArtemisX.
- The maximum supply of the token is 3.25 billion [3,250,000,000] $ArtemisX.
- No mint or burn functions are present, though the circulating supply can be reduced by sending tokens to the 0x..dead address.
- At the time of writing this report, there are 669 total token holders. The token allocation is as follows:
- 12.12% of the total supply is in Pancakeswap liquidity.
- Of that liquidity, 96.77% of the LP tokens are stored in a token locking contract and will vest to the team on April 7th, 2023.
- 7.52% of the total supply has been sent to the 0x..dead address.
- The next five holders own a cumulative 6.1% of the total supply.
- There is a Liquidity fee, Treasury fee, SafuDividend fee, and an AutoFirePit fee on all transfers via Pancakeswap where neither the sender nor the recipient is excluded from fees.
- There is an additional Sell fee added to all sell transactions via Pancakeswap.
- Blacklisted accounts are not permitted to transfer tokens.
- The contract enforces a maximum wallet amount that prevents a transfer from occurring if the recipient's token balance will exceed the limit number of tokens (determined by the owner) after the transfer occurs.
- The contract features an auto-rebase mechanism that is triggered on token transfers when the following conditions are met:
- The auto-rebase mechanism is enabled by the team.
- The token has not reached the maximum supply.
- The caller is not initiating a buy transaction via Pancakeswap.
- The contract is not currently swapping tokens, performing a rebase, or performing an automatic liquidity add.
- 15 minutes have passed since this functionality has previously occurred.
- During a rebase, tokens are automatically added to the total supply. The newly added tokens are distributed proportionally amongst holders in a frictionless manner.
- The number of tokens added to the total supply is dependent on the total supply at the time of rebasing and the time since deployment.
- The rebase function properly calls sync() on the Pancakeswap Pair contract to prevent theft-of-liquidity attacks that have occurred with other rebase tokens.
- Also during transfers, an automatic liquidity add will occur if at least 2 days have passed since the previous automatic liquidity add.
- A liquidity-add is funded by selling half of the tokens collected as liquidity fees, pairing the received BNB with the token, and adding it as liquidity to the BNB pair.
- The LP tokens received through this process are sent to the Liquidity address set by the team. We recommend that the team lock these newly acquired LP tokens.
- The tokens collected through the Treasury fee are swapped for BNB and sent to the team's Treasury wallet.
- The tokens collected through the SafuDividend fee are swapped for BNB and deposited into the DividendDistributor contract where it is swapped for BUSD and distributed as dividends amongst holders.
- The tokens collected through the AutoFirePit Fee are sent to the AutoFirePit address set by the team.
- Any user that holds any number of tokens is eligible to claim dividends once the amount of dividends they are due reaches the minimum threshold value determined by the team.
- Once dividends are distributed, they will need to be claimed; claiming happens automatically on each transfer.
- Alternatively, a user can manually claim dividends as an individual.
- There is a wait-time (determined by the owner) between claiming dividend rewards.
- Claimed dividends are sent to the user's wallet address.
- The owner can enable/disable automatic liquidity adds and the auto-rebase mechanism at any time.
- The owner can set the additional sell fee to any value up to 9%.
- The owner can include/exclude accounts from transfer fees and dividends at any time.
- The owner can add/remove any contract address from the transfer blacklist at any time. EOAs cannot be blacklisted.
- The owner can update the maximum wallet amount to any value at any time.
- The owner can exclude and include accounts from the maximum wallet amount at any time.
- The owner can swap all of the $ArtemisX in the contract for BNB and send it to the team's Treasury wallet at any time.
- The owner can set the amount of gas used for processing to any value up to 750,000.
- The owner can update the minimum threshold of dividends a user must be due in order to claim rewards to any value at any time.
- The owner can update the wait time between claiming rewards to any value at any time.
- The owner can update the Pancakeswap Pair address, Liquidity address, Treasury wallet, and the AutoFirePit address to any addresses at any time.
Audit Results
Vulnerability Category | Notes | Result |
---|---|---|
Arbitrary Jump/Storage Write | N/A | PASS |
Centralization of Control |
| PASS |
Compiler Issues | N/A | PASS |
Delegate Call to Untrusted Contract | N/A | PASS |
Dependence on Predictable Variables | N/A | PASS |
Ether/Token Theft | N/A | PASS |
Flash Loans | N/A | PASS |
Front Running | N/A | PASS |
Improper Events | N/A | PASS |
Improper Authorization Scheme | N/A | PASS |
Integer Over/Underflow | N/A | PASS |
Logical Issues | N/A | PASS |
Oracle Issues | N/A | PASS |
Outdated Compiler Version | N/A | PASS |
Race Conditions | N/A | PASS |
Reentrancy | N/A | PASS |
Signature Issues | N/A | PASS |
Unbounded Loops | N/A | PASS |
Unused Code | N/A | PASS |
Overall Contract Safety | PASS |
Inheritance Chart
Function Graph
Functions Overview
($) = payable function
# = non-constant function
Int = Internal
Ext = External
Pub = Public
+ [Lib] SafeMathInt
- [Int] mul
- [Int] div
- [Int] sub
- [Int] add
- [Int] abs
+ [Lib] SafeMath
- [Int] add
- [Int] sub
- [Int] sub
- [Int] mul
- [Int] div
- [Int] div
- [Int] mod
+ [Int] IERC20
- [Ext] totalSupply
- [Ext] balanceOf
- [Ext] allowance
- [Ext] transfer #
- [Ext] approve #
- [Ext] transferFrom #
+ [Int] IPancakeSwapPair
- [Ext] name
- [Ext] symbol
- [Ext] decimals
- [Ext] totalSupply
- [Ext] balanceOf
- [Ext] allowance
- [Ext] approve #
- [Ext] transfer #
- [Ext] transferFrom #
- [Ext] DOMAIN_SEPARATOR
- [Ext] PERMIT_TYPEHASH
- [Ext] nonces
- [Ext] permit #
- [Ext] MINIMUM_LIQUIDITY
- [Ext] factory
- [Ext] token0
- [Ext] token1
- [Ext] getReserves
- [Ext] price0CumulativeLast
- [Ext] price1CumulativeLast
- [Ext] kLast
- [Ext] mint #
- [Ext] burn #
- [Ext] swap #
- [Ext] skim #
- [Ext] sync #
- [Ext] initialize #
+ [Int] IPancakeSwapRouter
- [Ext] factory
- [Ext] WETH
- [Ext] addLiquidity #
- [Ext] addLiquidityETH ($)
- [Ext] removeLiquidity #
- [Ext] removeLiquidityETH #
- [Ext] removeLiquidityWithPermit #
- [Ext] removeLiquidityETHWithPermit #
- [Ext] swapExactTokensForTokens #
- [Ext] swapTokensForExactTokens #
- [Ext] swapExactETHForTokens ($)
- [Ext] swapTokensForExactETH #
- [Ext] swapExactTokensForETH #
- [Ext] swapETHForExactTokens ($)
- [Ext] quote
- [Ext] getAmountOut
- [Ext] getAmountIn
- [Ext] getAmountsOut
- [Ext] getAmountsIn
- [Ext] removeLiquidityETHSupportingFeeOnTransferTokens #
- [Ext] removeLiquidityETHWithPermitSupportingFeeOnTransferTokens #
- [Ext] swapExactTokensForTokensSupportingFeeOnTransferTokens #
- [Ext] swapExactETHForTokensSupportingFeeOnTransferTokens ($)
- [Ext] swapExactTokensForETHSupportingFeeOnTransferTokens #
+ [Int] IPancakeSwapFactory
- [Ext] feeTo
- [Ext] feeToSetter
- [Ext] getPair
- [Ext] allPairs
- [Ext] allPairsLength
- [Ext] createPair #
- [Ext] setFeeTo #
- [Ext] setFeeToSetter #
+ [Int] IDividendDistributor
- [Ext] setDistributionCriteria #
- [Ext] setShare #
- [Ext] deposit ($)
- [Ext] process #
+ DividendDistributor (IDividendDistributor)
- [Pub] #
- [Ext] setDistributionCriteria #
- modifiers: onlyToken
- [Ext] setShare #
- modifiers: onlyToken
- [Ext] deposit ($)
- modifiers: onlyToken
- [Ext] process #
- modifiers: onlyToken
- [Int] shouldDistribute
- [Int] distributeDividend #
- [Ext] claimDividend #
- [Pub] getUnpaidEarnings
- [Int] getCumulativeDividends
- [Int] addShareholder #
- [Int] removeShareholder #
+ Ownable
- [Pub] #
- [Pub] owner
- [Pub] isOwner
- [Pub] renounceOwnership #
- modifiers: onlyOwner
- [Pub] transferOwnership #
- modifiers: onlyOwner
- [Int] _transferOwnership #
+ ERC20Detailed (IERC20)
- [Pub] #
- [Pub] name
- [Pub] symbol
- [Pub] decimals
+ ArtemisX (ERC20Detailed, Ownable)
- [Pub] #
- modifiers: ERC20Detailed,Ownable
- [Int] rebase #
- [Ext] transfer #
- modifiers: validRecipient
- [Ext] transferFrom #
- modifiers: validRecipient
- [Int] _basicTransfer #
- [Int] _transferFrom #
- [Int] takeFee #
- [Int] addLiquidity #
- modifiers: swapping
- [Int] swapBack #
- modifiers: swapping
- [Ext] withdrawAllToTreasury #
- modifiers: swapping,onlyOwner
- [Int] shouldTakeFee
- [Int] shouldRebase
- [Int] shouldAddLiquidity
- [Int] shouldSwapBack
- [Ext] setAutoRebase #
- modifiers: onlyOwner
- [Ext] setAutoAddLiquidity #
- modifiers: onlyOwner
- [Ext] setMaxBalance #
- modifiers: onlyOwner
- [Ext] allowance
- [Ext] decreaseAllowance #
- [Ext] increaseAllowance #
- [Ext] approve #
- [Ext] checkFeeExempt
- [Ext] setIsDividendExempt #
- modifiers: onlyOwner
- [Ext] setDistributionCriteria #
- modifiers: onlyOwner
- [Ext] setDistributorSettings #
- modifiers: onlyOwner
- [Pub] getCirculatingSupply
- [Ext] isNotInSwap
- [Ext] manualSync #
- [Ext] setFeeReceivers #
- modifiers: onlyOwner
- [Pub] getLiquidityBacking
- [Ext] setWhitelist #
- modifiers: onlyOwner
- [Ext] setMaxExempt #
- modifiers: onlyOwner
- [Ext] setContractBotBlacklist #
- modifiers: onlyOwner
- [Ext] setLaunchBotterBlacklist #
- modifiers: onlyOwner
- [Ext] setSellFee #
- modifiers: onlyOwner
- [Ext] setLP #
- modifiers: onlyOwner
- [Ext] totalSupply
- [Pub] balanceOf
- [Int] isContract
- [Ext] ($)
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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.