CryptoCurrent Staking - Smart Contract Audit Report

Summary

CryptoCurrent Staking CryptoCurrent Staking is a staking contract which is part of the larger CryptoCurrent ecosystem. We previously reviewed the team's presale platform here and their HedgeTech vault here.

We reviewed CryptoCurrent's SingleStaking contract at commit 44572506b42de63c887b7307f417dc9c0eb990c3 on GitHub.

    Notes on the Contract:
  • Users can stake their HTG tokens in this contract to earn NFTs as rewards.
  • Users will be able to claim an NFT after a certian number of blocks. The number of blocks one must wait decreases as one stakes a larger amount of tokens.
  • Users will not forfeit any tokens when redeeming the NFT.
  • Staking a second time will push back the user's redemption time.
  • Upon unstaking, users will receive all of the HTG tokens they deposited earlier.
  • The only ownership-restriction function allows the Owner to update the metadata URI.
  • Utilization of SafeMath to prevent overflow issues.

Audit Findings Summary:
  • No security issues from external attackers were identified.
  • Date: May 4th, 2021

Combined Audit Results

Vulnerability CategoryNotesResult
Arbitrary Storage WriteN/APASS
Arbitrary JumpN/APASS
Delegate Call to Untrusted ContractN/APASS
Dependence on Predictable VariablesN/APASS
Deprecated OpcodesN/APASS
Ether ThiefN/APASS
ExceptionsN/APASS
External CallsN/APASS
Integer Over/UnderflowN/APASS
Multiple SendsN/APASS
SuicideN/APASS
State Change External CallsN/APASS
Unchecked RetvalN/APASS
User Supplied AssertionN/APASS
Critical Solidity CompilerN/APASS
Overall Contract Safety PASS

Function Graph

Smart Contract Graph

Inheritence Chart

Smart Contract Inheritance

Functions Overview



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

 +  Context 
    - [Int] _msgSender
    - [Int] _msgData

 + [Int] IERC165 
    - [Ext] supportsInterface

 + [Int] IERC721 (IERC165)
    - [Ext] balanceOf
    - [Ext] ownerOf
    - [Ext] safeTransferFrom #
    - [Ext] transferFrom #
    - [Ext] approve #
    - [Ext] getApproved
    - [Ext] setApprovalForAll #
    - [Ext] isApprovedForAll
    - [Ext] safeTransferFrom #

 + [Int] IERC721Metadata (IERC721)
    - [Ext] name
    - [Ext] symbol
    - [Ext] tokenURI

 + [Int] IERC721Enumerable (IERC721)
    - [Ext] totalSupply
    - [Ext] tokenOfOwnerByIndex
    - [Ext] tokenByIndex

 + [Int] IERC721Receiver 
    - [Ext] onERC721Received #

 +  ERC165 (IERC165)
    - [Int]  #
    - [Pub] supportsInterface
    - [Int] _registerInterface #

 + [Lib] SafeMath 
    - [Int] tryAdd
    - [Int] trySub
    - [Int] tryMul
    - [Int] tryDiv
    - [Int] tryMod
    - [Int] add
    - [Int] sub
    - [Int] mul
    - [Int] div
    - [Int] mod
    - [Int] sub
    - [Int] div
    - [Int] mod

 + [Lib] Address 
    - [Int] isContract
    - [Int] sendValue #
    - [Int] functionCall #
    - [Int] functionCall #
    - [Int] functionCallWithValue #
    - [Int] functionCallWithValue #
    - [Int] functionStaticCall
    - [Int] functionStaticCall
    - [Int] functionDelegateCall #
    - [Int] functionDelegateCall #
    - [Prv] _verifyCallResult

 + [Lib] EnumerableSet 
    - [Prv] _add #
    - [Prv] _remove #
    - [Prv] _contains
    - [Prv] _length
    - [Prv] _at
    - [Int] add #
    - [Int] remove #
    - [Int] contains
    - [Int] length
    - [Int] at
    - [Int] add #
    - [Int] remove #
    - [Int] contains
    - [Int] length
    - [Int] at
    - [Int] add #
    - [Int] remove #
    - [Int] contains
    - [Int] length
    - [Int] at

 + [Lib] EnumerableMap 
    - [Prv] _set #
    - [Prv] _remove #
    - [Prv] _contains
    - [Prv] _length
    - [Prv] _at
    - [Prv] _tryGet
    - [Prv] _get
    - [Prv] _get
    - [Int] set #
    - [Int] remove #
    - [Int] contains
    - [Int] length
    - [Int] at
    - [Int] tryGet
    - [Int] get
    - [Int] get

 + [Lib] Strings 
    - [Int] toString

 +  ERC721 (Context, ERC165, IERC721, IERC721Metadata, IERC721Enumerable)
    - [Pub]  #
    - [Pub] balanceOf
    - [Pub] ownerOf
    - [Pub] name
    - [Pub] symbol
    - [Pub] tokenURI
    - [Pub] baseURI
    - [Pub] tokenOfOwnerByIndex
    - [Pub] totalSupply
    - [Pub] tokenByIndex
    - [Pub] approve #
    - [Pub] getApproved
    - [Pub] setApprovalForAll #
    - [Pub] isApprovedForAll
    - [Pub] transferFrom #
    - [Pub] safeTransferFrom #
    - [Pub] safeTransferFrom #
    - [Int] _safeTransfer #
    - [Int] _exists
    - [Int] _isApprovedOrOwner
    - [Int] _safeMint #
    - [Int] _safeMint #
    - [Int] _mint #
    - [Int] _burn #
    - [Int] _transfer #
    - [Int] _setTokenURI #
    - [Int] _setBaseURI #
    - [Prv] _checkOnERC721Received #
    - [Int] _approve #
    - [Int] _beforeTokenTransfer #

 + [Lib] Counters 
    - [Int] current
    - [Int] increment #
    - [Int] decrement #

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

 +  ERC20 (Context, IERC20)
    - [Pub]  #
    - [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 #

 +  Ownable (Context)
    - [Int]  #
    - [Pub] owner
    - [Pub] renounceOwnership #
       - modifiers: onlyOwner
    - [Pub] transferOwnership #
       - modifiers: onlyOwner

 +  SingleStaking (ERC721, Ownable)
    - [Pub]  #
       - modifiers: ERC721
    - [Ext] changeTokenURI #
       - modifiers: onlyOwner
    - [Ext] stake ($)
    - [Ext] unstake #
    - [Ext] getRedeemBlock
    - [Ext] redeem #
    - [Ext] getHTGDeposited
    - [Int] mintNFT #

Source Code

Click here to download the source code as a .sol file.