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Home Sponsored Post

USDC Token Smart Contract Audit

admin by admin
November 16, 2024
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Theta Token Smart Contract Audit
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  May 29, 2024

Project Background

Website Details

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  • USD Coin (USDC) is a digital dollar stablecoin issued by Circle, fully backed by US dollar reserves. It offers global, near-instant, low-cost transactions and is regulated with transparent monthly reserve attestations. USDC is widely used across numerous blockchain networks and is designed to maintain a 1:1 value with the US dollar, making it a stable and secure digital currency. Businesses and individuals can easily mint and redeem USDC, ensuring liquidity and reliability.

Website: circle.com/en/usdc

Code Details

  • This Solidity code defines a token contract called FiatTokenV2_2, which is an upgraded version of the original FiatToken contract. Let’s break down its key features:
    • Versioning: The contract has multiple versions (FiatTokenV1, FiatTokenV1_1, FiatTokenV2, FiatTokenV2_1, FiatTokenV2_2). Each version introduces new functionalities or upgrades existing ones. The versioning allows for smooth upgrades without disrupting existing functionality.
    • Initial Setup: The contract initializes various parameters such as name, symbol, currency, decimals, master minter, pauser, blacklister, and owner. It ensures that these parameters are set correctly during contract deployment.
    • Minting and Burning: The contract supports minting and burning of tokens. Minters are designated addresses that can mint new tokens, subject to an allowance specified by the master minter.
    • Token Transfers: It facilitates token transfers between addresses. The transfer, transferFrom, and approve functions handle standard ERC-20 token transfer functionality.
    • Authorization: The contract implements ERC-3009 and ERC-2612 standards for token authorization. Users can approve spending tokens on their behalf without interacting with the contract directly. This functionality enhances security and usability.
    • Blacklisting: The contract allows for blacklisting specific accounts, preventing them from sending or receiving tokens. This feature is useful for compliance and security purposes.
    • Pausing: The contract can be paused and unpaused by the pauser address. When paused, token transfers are disabled, adding an extra layer of security and control.
    • Rescue Functionality: The contract includes a rescuer address that can recover ERC-20 tokens mistakenly sent to the contract address. This feature prevents tokens from being lost irreversibly.
    • Domain Separation: The contract uses domain separation for enhanced security in signature verification. It generates a unique domain separator for each version of the contract.
    • Upgradeability: The contract design allows for future upgrades by introducing new versions (FiatTokenV2_1, FiatTokenV2_2). Upgrades can introduce new functionalities or fix bugs while maintaining compatibility with existing applications.
  • Overall, the FiatTokenV2_2 contract provides a comprehensive set of features for managing and transferring ERC-20 tokens, with a focus on security, flexibility, and upgradability.
Audit Report in PDF:
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