Project Background

Website Details

• Kyber Network is a multi-chain crypto trading and liquidity hub that connects liquidity from different sources to enable trades at the best rates.
• Kyber’s technology connects the deepest crypto liquidity from diverse sources to provide the best rates and maximize returns for everyone. Swap tokens, earn yield, and build the best DeFi applications with Kyber.
• Kyber Network is a multi-chain crypto trading and liquidity hub. It aggregates liquidity from various sources to provide competitive trading rates. The platform allows users to swap tokens, provide liquidity, and earn rewards. Kyber Network is governed by the community through KyberDAO, where KNC token holders can stake tokens, vote on proposals, and earn rewards. It supports over 20,000 tokens and integrates with more than 100 decentralized applications (DApps).

Website: kyber.network

Code Details

This Solidity code defines an ERC20 token that is mintable and burnable via a bridge contract, specifically designed to work with the Optimism Layer 2 solution. Here’s an overview of the key components and functionalities:

Core Contract:

• Semver: Handles semantic versioning with `MAJOR_VERSION`, `MINOR_VERSION`, and `PATCH_VERSION`.

• ERC20:

• • Implements the standard ERC20 functionality with additional internal functions to handle minting, burning, allowances, and token transfers.
  • Functions include `name`, `symbol`, `decimals`, `totalSupply`, `balanceOf`, `transfer`, `allowance`, `approve`, `transferFrom`, `increaseAllowance`, `decreaseAllowance`, `_transfer`, `_mint`, `_burn`, `_approve`, `_spendAllowance`, `_beforeTokenTransfer`, and `_afterTokenTransfer`.

• OptimismMintableERC20:

• • Extends `ERC20` and `Semver` to create a mintable and burnable token for use with the Optimism bridge.
  • The constructor takes parameters for the bridge address, remote token address, token name, and symbol.
  • The `mint` and `burn` functions can only be called by the bridge contract.
  • Implements `supportsInterface` for interface detection.

This structure ensures that the token adheres to the ERC20 standard while adding the necessary functionalities for integration with the Optimism Layer 2 solution, specifically for minting and burning tokens via a designated bridge contract.

Audit Summary

• We observed 2 Informational issues in the smart contracts. but those are not critical.
• The security state of the reviewed smart contract, based on standard audit procedure scope, is “Secured”.

Executive Audit Summary

• According to the standard audit assessment, the Customer`s solidity smart contracts are “Secured”. This token contract does not have any ownership control, hence it is 100% decentralized.
  
• We used various tools like Slither, Solhint and Remix IDE. At the same time this finding is based on critical analysis of the manual audit.

Audit Report in PDF

Audit Report Flip book