Is Billion Zone Xchange (ZBX) Safe? Smart Contract Security Analysis

Security Findings

1 High1 Med1 Low1 Info

High

Truncated Source Code Prevents Comprehensive Audit

H-01The provided source code for the `ZBX.sol` contract is truncated, specifically after the import statement. This prevents a complete and thorough security audit of any custom logic, state variables, function overrides, or specific tokenomics implemented within the BillionZoneXchange token. Without the full code, it is impossible to identify potential vulnerabilities such as reentrancy, logic errors, access control flaws in custom functions, or economic exploits unique to this contract's design.

IssueThe provided source code for the `ZBX.sol` contract is truncated, specifically after the import statement. This prevents a complete and thorough security audit of any custom logic, state variables, function overrides, or specific tokenomics implemented within the BillionZoneXchange token. Without the full code, it is impossible to identify potential vulnerabilities such as reentrancy, logic errors, access control flaws in custom functions, or economic exploits unique to this contract's design.

FixProvide the complete and untruncated source code for the `ZBX.sol` contract to enable a comprehensive security audit. This is crucial for identifying and mitigating any vulnerabilities specific to the custom implementation.

StatusUnresolved

Medium

Implications of Renounced Ownership

M-01The `Ownable` contract's ownership has been renounced, meaning the `owner` address is now `address(0)`. While this decentralizes control and prevents a single entity from executing owner-only malicious actions (e.g., unauthorized minting if such functions were exposed), it also renders any administrative functions that rely on `onlyOwner` modifier permanently inaccessible. If the contract was designed with any critical owner-controlled features (e.g., pausing, fee adjustments, or emergency upgrades), these are now disabled, potentially limiting the protocol's ability to respond to unforeseen circumstances or future needs.

IssueThe `Ownable` contract's ownership has been renounced, meaning the `owner` address is now `address(0)`. While this decentralizes control and prevents a single entity from executing owner-only malicious actions (e.g., unauthorized minting if such functions were exposed), it also renders any administrative functions that rely on `onlyOwner` modifier permanently inaccessible. If the contract was designed with any critical owner-controlled features (e.g., pausing, fee adjustments, or emergency upgrades), these are now disabled, potentially limiting the protocol's ability to respond to unforeseen circumstances or future needs.

FixEnsure that all necessary administrative functions were either removed, made public, or designed to be self-sufficient before ownership renouncement. For future projects, if administrative control is desired, consider using a multi-signature wallet or a time-locked governance mechanism instead of renouncing ownership, or clearly document the implications of renouncement for all stakeholders.

StatusUnresolved

Low

Lack of Emergency Pausability

L-01The standard ERC20 contract, as implemented, does not include a mechanism to pause token transfers or other critical operations. In the event of a major vulnerability in an integrated DeFi protocol, a market manipulation attack, or other unforeseen emergencies, the inability to pause could lead to cascading losses or further exploitation. Given that ownership is renounced, adding such a mechanism post-deployment is not possible.

IssueThe standard ERC20 contract, as implemented, does not include a mechanism to pause token transfers or other critical operations. In the event of a major vulnerability in an integrated DeFi protocol, a market manipulation attack, or other unforeseen emergencies, the inability to pause could lead to cascading losses or further exploitation. Given that ownership is renounced, adding such a mechanism post-deployment is not possible.

FixFor future token designs, consider integrating a pausable mechanism (e.g., OpenZeppelin's `Pausable` contract) if the token is intended for use in complex DeFi ecosystems where emergency intervention might be necessary. This feature should be carefully designed with appropriate access controls (e.g., multi-signature or governance-controlled) to prevent abuse.

StatusUnresolved

Info

Standard OpenZeppelin Contract Usage

I-01The core functionality of the token, including its ERC20 standard compliance and ownership management, is derived from well-audited and widely used OpenZeppelin contracts (`ERC20.sol` and `Ownable.sol`). These contracts have undergone extensive security reviews and battle-testing, significantly reducing the likelihood of common vulnerabilities such as reentrancy, integer overflows/underflows, or basic access control bypasses within their scope.

IssueThe core functionality of the token, including its ERC20 standard compliance and ownership management, is derived from well-audited and widely used OpenZeppelin contracts (`ERC20.sol` and `Ownable.sol`). These contracts have undergone extensive security reviews and battle-testing, significantly reducing the likelihood of common vulnerabilities such as reentrancy, integer overflows/underflows, or basic access control bypasses within their scope.

FixContinue to leverage established and audited libraries like OpenZeppelin for foundational contract components. Regularly review for updates and security patches to these libraries.

StatusResolved

Category Ratings

TechnicalLow9/10

The technical architecture (7.1) is a standard ERC20 token inheriting from OpenZeppelin's Ownable and ERC20 contracts, which are highly secure and widely adopted. Code security (7.2) benefits from the robust OpenZeppelin base, including safe use of `unchecked` blocks for gas optimization. However, the truncated `ZBX.sol` source code is a significant limitation, preventing a full assessment of any custom logic, potential reentrancy, or integer overflow/underflow vulnerabilities beyond the standard ERC20 implementation. Without the complete code, a thorough review of custom functions and their interactions is impossible.

GovernanceMedium4/10

The contract's access control (7.3) is managed by OpenZeppelin's Ownable pattern. The ownership has been renounced, which decentralizes control and eliminates the risk of a single owner performing malicious actions (e.g., unauthorized minting if such functions were owner-controlled). This design choice, however, means that no administrative functions can be executed post-renouncement, which could be a concern if future governance (7.5) or operational (7.8) changes were ever intended. The economic model (7.4) appears to be a standard ERC20 token, implying simple and predictable tokenomics, though specific details are unknown due to truncated code.

UpgradesLow10/10

The contract is not designed as a proxy (7.7) and is therefore not upgradeable. This eliminates all risks associated with upgrade mechanisms, such as proxy implementation vulnerabilities, storage collisions, or insecure upgrade paths. The immutability provides certainty regarding the contract's code and behavior post-deployment.

Security Checklist

5/5 checks passed

Contract VerifiedPass

Ownership RenouncedPass

No Mint FunctionPass

Liquidity LockedPass

Not a ProxyPass

Holder Composition

80.2% in top 10

67.2% in wallets13.1% in contracts

Effective Concentration72.4%

Share held by contracts — treasury, vesting, bridge or staking — is discounted against share held by wallets when the score is computed: a contract cannot decide to sell the way an anonymous holder can, though it can still be drained or voted to sell. Effective concentration is the figure the risk score is actually calculated from.

Liquidity Depth

$18.2K

The risk score reads depth across every pair. The volume figure and the volume-to-liquidity ratio elsewhere on this page describe only the pair this audit analysed, so the two are not directly comparable.

LP Distribution

LP Burned100.0% · ≈ permanent lock

LP Locked100.0% · Null Address

Key Addresses

2 addresses

Deployer

0xefa4…b25c

Unlocked LP Held By

0x02ad…b9d0

No privileged address appears among these holders: the unlocked liquidity sits with independent providers, not with the deployer.

What Raised This Score

6 factors

Top-10 concentration > 70% (80.2% total → 72.4% effective; 67.2% in EOAs, 13.1% in contracts — extreme)
Liquidity < $50k ($18,223 across 1 pairs — thin market)
Token age < 30 days (still settling)
1 High finding(s) from audit
1 Medium finding(s) from audit
1 Low finding(s) from audit

Each factor is an on-chain fact recorded at the time of this analysis. The score is computed from them by a deterministic function, so the same contract returns the same score for anyone who runs the audit. How scores are computed

Final Recommendation

AI Copilot

To ensure the highest level of security assurance, it is strongly recommended to provide the complete and untruncated source code for the `ZBX.sol` contract.…

Read the verdictHide

This would enable a full audit of any custom logic, tokenomics, and interactions, allowing for a comprehensive assessment of potential vulnerabilities. For future projects, carefully consider the implications of renouncing ownership, especially if any administrative functions (like pausing or emergency upgrades) might be required. If such controls are deemed necessary, implement them with robust multi-signature or time-locked mechanisms before renouncing ownership.

Contract

TypeToken

Audit History

1 audit on record

Aug 1321Sep 428

Score changes are recorded as dated snapshots — history is append-only and cannot be edited.

Is Billion Zone Xchange Safe?

Security Findings

Truncated Source Code Prevents Comprehensive Audit

Implications of Renounced Ownership

Lack of Emergency Pausability

Standard OpenZeppelin Contract Usage

Category Ratings

Security Checklist

Holder Composition

Liquidity Depth

LP Distribution

Key Addresses

What Raised This Score

Related Audits

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