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SYND [SynDEX] Token

About SYND

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Token 11 months
white paper

SynDEX protocol is a decentralized crypto volatility index with an elastic supply. It is designed to systematically and automatically track the market performance of the components constituting the SynDEX Index by neutralizing market capitalization dominance and measuring real-time volatility.

The SynDEX Index tracks the growth and adoption of the 10 key crypto assets that are selected on the basis of market trends, permeation, liquidity, and cross-asset interdependency.

Laser Scorebeta Last Audit: 19 February 2022

report
Code:


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

Address.isContract(address) (#449-458) uses assembly
- INLINE ASM (#456)
Do not use evm assembly.

Additional information: link

SYNDToken._setRebaser(address).rebaser_ (#881) lacks a zero-check on :
- rebaser = rebaser_ (#886)
SYNDToken._setPendingGov(address).pendingGov_ (#893) lacks a zero-check on :
- pendingGov = pendingGov_ (#898)
SYND.initialize(string,string,uint8,address,uint256).initial_owner (#1009) lacks a zero-check on :
- gov = initial_owner (#1020)
Check that the address is not zero.

Additional information: link

Reentrancy in SYNDToken.approve(address,uint256) (#828-836):
External calls:
- rebaseAtTheEnd() (#830)
- IRebaser(rebaser).checkRebase() (#599)
State variables written after the call(s):
- _allowedFragments[msg.sender][spender] = value (#833)
Reentrancy in SYNDToken.decreaseAllowance(address,uint256) (#862-875):
External calls:
- rebaseAtTheEnd() (#864)
- IRebaser(rebaser).checkRebase() (#599)
State variables written after the call(s):
- _allowedFragments[msg.sender][spender] = 0 (#869)
- _allowedFragments[msg.sender][spender] = oldValue.sub(subtractedValue) (#871)
Reentrancy in SYNDToken.increaseAllowance(address,uint256) (#845-854):
External calls:
- rebaseAtTheEnd() (#847)
- IRebaser(rebaser).checkRebase() (#599)
State variables written after the call(s):
- _allowedFragments[msg.sender][spender] = _allowedFragments[msg.sender][spender].add(addedValue) (#850-851)
Reentrancy in SYNDToken.transfer(address,uint256) (#728-750):
External calls:
- rebaseAtTheEnd() (#731)
- IRebaser(rebaser).checkRebase() (#599)
State variables written after the call(s):
- _syndBalances[msg.sender] = _syndBalances[msg.sender].sub(syndValue) (#743)
- _syndBalances[to] = _syndBalances[to].add(syndValue) (#746)
Reentrancy in SYNDToken.transferFrom(address,address,uint256) (#758-776):
External calls:
- rebaseAtTheEnd() (#760)
- IRebaser(rebaser).checkRebase() (#599)
State variables written after the call(s):
- _allowedFragments[from][msg.sender] = _allowedFragments[from][msg.sender].sub(value) (#765)
- _syndBalances[from] = _syndBalances[from].sub(syndValue) (#771)
- _syndBalances[to] = _syndBalances[to].add(syndValue) (#772)
Apply the check-effects-interactions pattern.

Additional information: link

Reentrancy in SYNDToken.approve(address,uint256) (#828-836):
External calls:
- rebaseAtTheEnd() (#830)
- IRebaser(rebaser).checkRebase() (#599)
Event emitted after the call(s):
- Approval(msg.sender,spender,value) (#834)
Reentrancy in SYNDToken.decreaseAllowance(address,uint256) (#862-875):
External calls:
- rebaseAtTheEnd() (#864)
- IRebaser(rebaser).checkRebase() (#599)
Event emitted after the call(s):
- Approval(msg.sender,spender,_allowedFragments[msg.sender][spender]) (#873)
Reentrancy in SYNDToken.increaseAllowance(address,uint256) (#845-854):
External calls:
- rebaseAtTheEnd() (#847)
- IRebaser(rebaser).checkRebase() (#599)
Event emitted after the call(s):
- Approval(msg.sender,spender,_allowedFragments[msg.sender][spender]) (#852)
Reentrancy in SYNDToken.transfer(address,uint256) (#728-750):
External calls:
- rebaseAtTheEnd() (#731)
- IRebaser(rebaser).checkRebase() (#599)
Event emitted after the call(s):
- Transfer(msg.sender,to,value) (#747)
Reentrancy in SYNDToken.transferFrom(address,address,uint256) (#758-776):
External calls:
- rebaseAtTheEnd() (#760)
- IRebaser(rebaser).checkRebase() (#599)
Event emitted after the call(s):
- Transfer(from,to,value) (#773)
Apply the check-effects-interactions pattern.

Additional information: link

Different versions of Solidity is used:
- Version used: ['0.5.16', '^0.5.0', '^0.5.5']
- 0.5.16 (#7)
- ^0.5.0 (#18)
- 0.5.16 (#179)
- 0.5.16 (#247)
- 0.5.16 (#317)
- ^0.5.0 (#347)
- ^0.5.5 (#426)
- ^0.5.0 (#499)
- 0.5.16 (#578)
Use one Solidity version.

Additional information: link

Address.sendValue(address,uint256) (#488-494) is never used and should be removed
Address.toPayable(address) (#466-468) is never used and should be removed
SafeERC20.safeApprove(IERC20,address,uint256) (#525-534) is never used and should be removed
SafeERC20.safeDecreaseAllowance(IERC20,address,uint256) (#541-544) is never used and should be removed
SafeERC20.safeIncreaseAllowance(IERC20,address,uint256) (#536-539) is never used and should be removed
SafeERC20.safeTransferFrom(IERC20,address,address,uint256) (#521-523) is never used and should be removed
SafeMath.mod(uint256,uint256) (#152-154) is never used and should be removed
SafeMath.mod(uint256,uint256,string) (#169-172) is never used and should be removed
Remove unused functions.

Additional information: link

Pragma version^0.5.0 (#18) allows old versions
Pragma version^0.5.0 (#347) allows old versions
Pragma version^0.5.5 (#426) is known to contain severe issues (https://solidity.readthedocs.io/en/latest/bugs.html)
Pragma version^0.5.0 (#499) 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.sendValue(address,uint256) (#488-494):
- (success) = recipient.call.value(amount)() (#492)
Low level call in SafeERC20.callOptionalReturn(IERC20,bytes) (#552-571):
- (success,returndata) = address(token).call(data) (#564)
Avoid low-level calls. Check the call success. If the call is meant for a contract, check for code existence

Additional information: link

Constant TokenStorage.internalDecimals (#224) is not in UPPER_CASE_WITH_UNDERSCORES
Variable TokenStorage._syndBalances (#236) is not in mixedCase
Variable TokenStorage._allowedFragments (#238) is not in mixedCase
Function TokenInterface._setRebaser(address) (#310) is not in mixedCase
Function TokenInterface._setPendingGov(address) (#311) is not in mixedCase
Function TokenInterface._acceptGov() (#312) is not in mixedCase
Function SYNDToken._setRebaser(address) (#881-888) is not in mixedCase
Function SYNDToken._setPendingGov(address) (#893-900) is not in mixedCase
Function SYNDToken._acceptGov() (#905-913) is not in mixedCase
Parameter SYND.initialize(string,string,uint8,address,uint256).initial_owner (#1009) is not in mixedCase
Follow the Solidity naming convention.

Additional information: link

initialize(string,string,uint8,address,uint256) should be declared external:
- SYND.initialize(string,string,uint8,address,uint256) (#1005-1021)
Use the external attribute for functions never called from the contract.

Additional information: link

Holders:


Average 30d PancakeSwap liquidity is less than $100. Token is either dead or inactive.


Average 30d PancakeSwap volume is less than $100. Token is either dead or inactive.


Average 30d number of PancakeSwap swaps is less than 1. Token is either dead or inactive.


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


Number of Binance Smart Chain (BSC) token holders is low.


Token is deployed only at one blockchain


Telegram account has relatively few subscribers


Twitter account has relatively few followers


Unable to find Youtube account

Search:


Unable to crawl data from the website


Unable to find token on CoinMarketCap

Additional information: link


Unable to find token contract audit


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


Young tokens have high risks of price dump / death


Token has relatively low CoinGecko rank

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