Smart Contract Security Audit Report

The RNOISE RECORDS engineering team commissioned a comprehensive security audit of all core smart contracts deployed on RNOISE Chain and BSC, including the token contract, IDO presale contract, staking contract, and marketplace. The audit covered reentrancy vulnerabilities, arithmetic overflow, access control integrity, and cross-chain bridging safety. No unresolved critical or high-severity vulnerabilities were found; all reported issues have been resolved and re-verified.

RNOISE Chain

AUDIT PASS

All core smart contracts meet production security standards

Audit Scope

In-scope contracts: Token minting & deflationary burn logic (RNSToken.sol), IDO crowdfunding exchange-rate logic (RNSPresale.sol), staking reward calculation (RNSStaking.sol), and decentralized music rights trading engine (BeatMarketplace.sol).

Key Findings & Remediations

1. USDT Decimal Precision Fix (Medium)

Description: In the RNSPresale contract, the presale accepted standard USDT with 6 decimal precision. The initial calculation logic could cause precision loss or minor slippage when converting between 6-decimal USDT and 18-decimal RNS token amounts.

Fix Applied: The exchange rate algorithm was optimized with explicit scalar adjustment. Updated code applies multiplication first before division, completely eliminating any precision-loss risk. Fully verified via Hardhat unit and scenario tests.

2. Reentrancy Protection (Medium)

Description: The BeatMarketplace contract distributed token withdrawal earnings via external calls. If the receiving address was a malicious contract, it could call withdraw() again before balances were decremented, enabling reentrancy.

Fix Applied: Integrated OpenZeppelin ReentrancyGuard and applied nonReentrant modifiers to all withdrawal and settlement functions. Strict Checks-Effects-Interactions pattern now enforced throughout.

Security Checklist

• ✓
  Reentrancy: Fully mitigated via nonReentrant decorators; all state changes precede external calls.
• ✓
  Access Control: All privileged configurations use Ownable2Step two-phase owner transfer, preventing single-point compromise.
• ✓
  Front-Running: Presale and staking caps enforced by contract logic, preventing slippage manipulation.
• ✓
  Randomness Predictability: Core algorithms do not rely on manipulable on-chain sources such as timestamps or block hashes.
• ✓
  Integer Overflow/Underflow: Solidity 0.8.x built-in overflow protection supplemented with SafeMath-style bounds checks.
• ✓
  Upgrade Safety: OpenZeppelin Transparent Proxy standard adopted to prevent storage collisions and uninitialized implementation bugs.

Audited Contract Addresses