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MERL [Merlin] Token

About MERL

Listings

Token 19 months
CoinMarketCap 18 months

Merlin is an auto-compounding yield aggregator with an ecosystem optimized to focus on safe and sustainable maximum yield return.

Laser Scorebeta Last Audit: 30 November 2021

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Token is either risky or in presale. For presale 30+ is a fine score.

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Unable to find manual contract audit (e.g. Certik, PeckShield, Solidity...)

MerlinToken._writeCheckpoint(address,uint32,uint256,uint256) (contracts/MerlinToken.sol#212-230) uses a dangerous strict equality:
- nCheckpoints > 0 && checkpoints[delegatee][nCheckpoints - 1].fromBlock == blockNumber (contracts/MerlinToken.sol#222)
Don't use strict equality to determine if an account has enough Ether or tokens.

Additional information: link

BEP20._approve(address,address,uint256).owner (@pancakeswap/pancake-swap-lib/contracts/token/BEP20/BEP20.sol#294) shadows:
- Ownable.owner() (@pancakeswap/pancake-swap-lib/contracts/access/Ownable.sol#36-38) (function)
Rename the local variables that shadow another component.

Additional information: link

MerlinToken.delegateBySig(address,uint256,uint256,uint8,bytes32,bytes32) (contracts/MerlinToken.sol#78-119) uses timestamp for comparisons
Dangerous comparisons:
- require(bool,string)(now <= expiry,MERLIN::delegateBySig: signature expired) (contracts/MerlinToken.sol#117)
Avoid relying on block.timestamp.

Additional information: link

MerlinToken.getChainId() (contracts/MerlinToken.sol#237-241) uses assembly
- INLINE ASM (contracts/MerlinToken.sol#239)
Do not use evm assembly.

Additional information: link

Different versions of Solidity is used:
- Version used: ['>=0.4.0', '^0.6.12', '^0.6.2']
- >=0.4.0 (@pancakeswap/pancake-swap-lib/contracts/GSN/Context.sol#3)
- >=0.4.0 (@pancakeswap/pancake-swap-lib/contracts/access/Ownable.sol#3)
- >=0.4.0 (@pancakeswap/pancake-swap-lib/contracts/math/SafeMath.sol#3)
- >=0.4.0 (@pancakeswap/pancake-swap-lib/contracts/token/BEP20/BEP20.sol#3)
- >=0.4.0 (@pancakeswap/pancake-swap-lib/contracts/token/BEP20/IBEP20.sol#3)
- ^0.6.2 (@pancakeswap/pancake-swap-lib/contracts/utils/Address.sol#3)
- ^0.6.12 (contracts/MerlinToken.sol#2)
Use one Solidity version.

Additional information: link

SafeMath.sqrt(uint256) (@pancakeswap/pancake-swap-lib/contracts/math/SafeMath.sol#177-188) is never used and should be removed
Remove unused functions.

Additional information: link

Pragma version^0.6.2 (@pancakeswap/pancake-swap-lib/contracts/utils/Address.sol#3) allows old versions
Deploy with any of the following Solidity versions: 0.5.16 - 0.5.17, 0.6.11 - 0.6.12, 0.7.5 - 0.7.6 Use a simple pragma version that allows any of these versions. Consider using the latest version of Solidity for testing.

Additional information: link

Low level call in Address._functionCallWithValue(address,bytes,uint256,string) (@pancakeswap/pancake-swap-lib/contracts/utils/Address.sol#134-160):
- (success,returndata) = target.call{value: weiValue}(data) (@pancakeswap/pancake-swap-lib/contracts/utils/Address.sol#143)
Avoid low-level calls. Check the call success. If the call is meant for a contract, check for code existence

Additional information: link

Variable MerlinToken._delegates (contracts/MerlinToken.sol#20) is not in mixedCase
Follow the Solidity naming convention.

Additional information: link

Redundant expression "this (@pancakeswap/pancake-swap-lib/contracts/GSN/Context.sol#25)" inContext (@pancakeswap/pancake-swap-lib/contracts/GSN/Context.sol#15-28)
Remove redundant statements if they congest code but offer no value.

Additional information: link

mint(address,uint256) should be declared external:
- MerlinToken.mint(address,uint256) (contracts/MerlinToken.sol#8-11)
Use the external attribute for functions never called from the contract.

Additional information: link

Holders:


Average PancakeSwap trading volume, liqudity, number of swaps are extremely low. Token seems to be dead.


Token is deployed only at one blockchain


Token has only one trading pair


Unable to find PancakeSwap trading pair to compute liquidity.


Unable to find PancakeSwap trading pair to compute volume.


Unable to find PancakeSwap trading pair to compute number of swaps.


Twitter account link seems to be invalid


Telegram account has relatively few subscribers


Unable to find Youtube account


Unable to crawl data from the website


BscScan page for the token does not contain additional info: website, socials, description, etc.

Additional information: link


Token was delisted (assigned to inactive / untracked listing) from CoinMarketCap

Additional information: link


Unable to find token/project description on the website or on BscScan, CoinMarketCap


Unable to find token contract audit


Unable to verify token contract address on the website


Unable to find audit link on the website


Unable to find whitepaper link on the website


Unable to find Telegram link on the website


Unable to find Twitter link on the website


Unable to find token on CoinHunt

Additional information: link


Token has a considerable age, but we're still unable to find its website


Young tokens have high risks of scam / price dump / death


Token has no active CoinMarketCap listing / rank


Token has a considerable age, but social accounts / website are missing or have few users


Token has a considerable age, but average PancakeSwap 30d trading volume is low


Young tokens have high risks of price dump / death


Token has relatively low CoinGecko rank

Price for MERL