Евгений
@ratnik
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Евгений
@ratnik
I just minted an onchain subscription on Hypersub! https://hypersub.xyz/s/gif?referrer=0x0db3e528132c0c8b4c669c9a34de841768116a81
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Евгений
@ratnik
Eliminating Possible Overflows: Add overflow checks during calculations: python @view def getReturnPerSlot(x: uint256) -> uint256: return isqrt(x * isqrt(x)) // REWARD_DENOMINATOR Zero Address Checks: python @external def transfer(_to: address, _value: uint256) -> bool: assert _to != address(0), "Transfer to the zero address" assert self.balances[msg.sender] >= _value, "Insufficient balance" self.balances[msg.sender] -= _value self.balances[_to] += _value return True These changes will help improve the reliability and security of your smart contract.
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Евгений
@ratnik
External Contract Calls Check: Ensure that all external contract calls are checked for successful execution: python success: bool = extcall STAKED_TOKEN_ADDRESS.transfer(msg.sender, totalOut, default_return_value=True) assert success Suggested Fixes: Using Safe Mathematical Operations: It is recommended to use safe functions for arithmetic operations to avoid overflows, such as safeMath. Adding Checks for Minting: python @external def mint(_to: address, _value: uint256): assert _value > 0, "Mint value should be greater than zero" self.balances[_to] += _value self.total_supply += _value Improving Whitelist Check: python @view def isEligible(user: address) -> bool: balance: uint256 = staticcall UNIQUEID_TOKEN_ADDRESS.balanceOf(user, UNIQUEID_TOKEN_COLLECTION) return balance > 0
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Евгений
@ratnik
Hello Vitaliy! Possible vulnerabilities and errors: Whitelist Check: Make sure that the isEligible function correctly checks the user's presence in the whitelist. It may be necessary to add a check for the existence of tokens of a specific ERC1155 identifier. Minting Security: In the mint function of the ERC-20 contract, ensure that everything is checked for overflow: python self.balances[_to] += _value self.total_supply += _value If _value is too large, it could cause an overflow. Overflow in Rewards: Check the correctness of calculations in the _unstake function to exclude possible overflows: python totalOut: uint256 = self.stakedAmount[msg.sender] + timeElapsed * returnPerSlot Zero Address Check: In the transfer function of the ERC-20 contract, add a check for zero addresses: python assert _to != address(0), "Transfer to the zero address" Time and Blocks Management: In the tests, use the correct methods for managing time and blocks to avoid possible errors when moving timestamps.
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