Open-source code doesn’t mean it’s secure: how can ordinary users verify the real risks of a smart contract?
In the Web3 world, we often hear a few terms:
Open source, decentralization, smart contracts, audits, on-chain transparency.
These words all sound reassuring.
But there’s one question worth thinking about carefully:
If a project’s code is public, why might users still risk losing their assets?
The reason is that making code public only makes verification possible. It doesn’t mean everyone has verified it, that the contract has no vulnerabilities or the administrators have no special privileges, or that users won’t make mistakes.
For everyday users, what really matters is not seeing a project claim that it is “open source,” but being able to determine:
Can I verify the contracts it actually runs?
Does the contract have any special permissions that could affect assets?
What exactly did the audit report examine?
Do the actions I authorized the contract to perform exceed what is actually necessary?
If something unusual happens, can I identify the risk in time?
Today, we are not discussing which projects are definitely safe, nor recommending any tokens.
From the perspective of everyday users, we are building a practical framework for checking smart contract risks.
I. Step One: Confirm that the contract you see is actually the one in operation
Many users see a contract address on a project's official website and assume they have completed the first verification step.
But that is not enough.
You need to verify a few basic details.
1. Does the contract address match?
Check the contract address published through the project's official channels, and look it up using a trusted block explorer for the relevant blockchain.
Do not rely only on search results, social media comments, group chat messages, or links sent by other users to verify an address.
Pay particular attention to tokens with identical names, spoofed websites, and lookalike addresses.
2. Is the blockchain network correct?
The same project may deploy different contracts on different blockchains.
Even if the names and icons are the same, this does not mean the contracts have the same permissions, assets, or security status.
When checking an address, you must also confirm the network.
3. Has the source code been verified?
If a block explorer indicates that a contract's source code has been verified, it means the publicly available source code meets that explorer's verification requirements for the corresponding deployed bytecode.
This helps external parties inspect the contract logic.
But it is important to understand:
Verified source code does not mean the source code is free of vulnerabilities.
Verification establishes whether the code corresponds to the deployed contract, not whether it is secure.
You also need to make sure you are checking the contract actually in use, rather than an unrelated contract address in the project.
II. Step Two: Check Contract Permissions, Not Just Whether the Code Is Public
This is the aspect everyday users are most likely to overlook.
Some contracts retain administrator permissions after deployment.
These permissions do not necessarily mean the project is acting maliciously, but they may affect users' assets, trading rules, or protocol operations.
Pay particular attention to the following types of permissions.
1. Pause permissions
Some contracts allow specific addresses to pause transfers, trading, or other functions.
You need to know:
Who has the authority to pause the contract?
Which functions can be paused?
How would a pause affect users?
Is there a clear mechanism for resuming operations?
A pause function may serve as an emergency safeguard. But if the scope of the permission and the rules for using it are not transparent, it is difficult for users to assess the associated risks.
2. Minting permissions
For tokens that can be minted, verify who can create new tokens and whether minting is subject to limits on quantity or timing, or to governance rules.
If a specific address can mint tokens without clear restrictions, this could affect the token supply and holders' interests.
However, not all tokens have minting functionality, and not all minting mechanisms mean that a project is unsafe.
What matters is whether the permissions are clear and the rules are verifiable.
3. Administrator permissions to change parameters
Some protocols allow administrators to change fees, trading restrictions, whitelists, fund usage rules, or other key parameters.
These permissions may serve legitimate operational purposes, but users should know:
Who can make changes?
What can be changed?
Are changes subject to a timelock or governance mechanism?
Can these operations be checked on-chain?
Do not assume that all key decisions are made by the community simply because a project claims to use decentralized governance.
4. Upgrade permissions for proxy contracts
This is an area that deserves particular attention.
Some smart contracts use a proxy pattern, allowing the contract's implementation logic to be upgraded while retaining the original address or some of its state.
This design can make it easier to fix vulnerabilities and add features, but it also raises a concern:
If an administrator or multisig address can upgrade the implementation contract, the code executed in the future may differ from the code you see today.
Therefore, you should also verify:
Does the contract use a proxy pattern?
Which implementation contract does it currently point to?
Who has upgrade permissions?
Do upgrades require a multisig or timelock?
Are upgrade records public and traceable?
The fact that today's code can be inspected does not mean the code will never change in the future.
That is why you cannot assess a smart contract by looking only at its code at a single point in time.
III. Step Three: What Does an Audit Report Actually Prove?
When a project says it has undergone a security audit, many users jump to the conclusion:
“If it has been audited, it should be fine.”
That is not a rigorous way to interpret an audit.
An audit can help identify code vulnerabilities, permission design issues, and other security risks, but its scope and findings are limited to a specific time and codebase.
Everyday users should check at least four things.
First, who conducted the audit?
Check whether the audit report comes from an official source that can be independently verified, rather than just an image on the project's promotional page.
Second, which version was audited?
Does the code version covered by the report match the contract currently deployed?
If the project changed its code after the audit, you need to further check the scope of those changes and whether they were reviewed again.
Third, what was included in the audit scope?
Did the report cover the core contracts, fund management modules, permission management, and related components?
An audit of one module does not mean that every component of the project has undergone the same level of review.
Fourth, were the issues found addressed?
Check the issues identified in the audit, the project's explanation of fixes, and whether the auditing firm confirmed those fixes.
Even if the report lists no unresolved high-risk issues, that does not mean the contract is absolutely safe.
Audit findings should be understood in the context of the actual code, permission settings, and operating conditions.
Remember:
An audit is a security assessment, not a guarantee that assets will remain safe in the future.
IV. Step Four: Sometimes the Truly Risky Action Is the Authorization You Grant
In addition to the contract's design, user actions can also introduce risks.
For example, during some token trades, DeFi interactions, or NFT transactions, a website may ask you to authorize a contract to use your tokens or perform specific actions.
Many users focus only on whether a transaction succeeds and overlook what the authorization itself means.
What is token approval?
For a common ERC-20 token, an approval typically allows a specified contract address to use the relevant tokens on your behalf, up to a certain amount.
The approval amount may be limited, very large, or even have no explicit cap.
It is important to distinguish between two things:
Connecting a wallet is not the same as authorizing token transfers.
Connecting a wallet mainly establishes an interaction between a website and your wallet. Signing an approval transaction may give a specified contract permission to actually use your tokens.
So whenever you receive an approval request, check:
What is the address of the contract being approved?
Which token does the approval apply to?
What is the approval amount?
Is this permission necessary for the operation you are performing?
Do the website and contract address come from trusted official channels?
If the approval amount seems significantly greater than necessary, carefully consider whether you need to proceed.
For approvals you no longer need, you can use a trusted block explorer or approval management tool to check and revoke the relevant permissions.
However, note that revoking an approval usually requires an on-chain transaction and may incur network fees. Revoking one token approval also does not automatically eliminate other approvals or other types of risk.
Also, not every signature is a regular transfer.
Some signatures may be used for off-chain approvals, orders, or other on-chain operations. So do not assume a signature is risk-free just because the signing interface does not directly show a transfer amount.
If you do not understand what a signature means, the safest thing to do is pause and first confirm what the request entails.
V. Step Five: Don't Just Look at What the Project Says—Check What Actually Happens On-Chain
One important feature of Web3 is that many key operations leave public on-chain records.
This makes independent verification possible.
For example, depending on the protocol, you can check:
Contract deployment and upgrade records;
Changes to administrator permissions;
Adjustments to important parameters;
Funds moving in and out;
Related event logs;
Publicly disclosed governance proposals and execution records.
However, the fact that something is visible on-chain does not mean it is easy to understand.
Some operations can only be interpreted correctly by examining event logs, contract code, transaction calldata, and relevant protocol documentation together.
Everyday users do not need to try to understand all on-chain data at once.
You can start with a simple habit:
When a project announces a major update, try to check the corresponding on-chain transaction, executing address, and details of the change.
If a project claims to have completed an important feature but cannot provide verifiable deployment information or operation records, that is at least worth asking about further.
Likewise, not finding a particular record does not immediately prove that a project is being deceptive. You should also consider the relevant network, search scope, indexing status, and implementation details.
Truly meaningful transparency is not just about providing information; it is about enabling outsiders to verify it independently.
VI. Step Six: A Practical Security Checklist for Everyday Users
Before interacting with an unfamiliar Web3 project or smart contract, you can complete the following checks.
A. Project and addresses
☐ Confirm the website and contract address through trusted official channels.
☐ Confirm the relevant blockchain network.
☐ Check for projects with identical names or spoofed addresses.
☐ Check the source code verification status and whether it corresponds to the deployed contract.
B. Contract permissions
☐ Check for permissions to pause the contract, mint tokens, or change key parameters.
☐ Check whether a proxy upgrade mechanism is used.
☐ Confirm who controls administrator or upgrade permissions.
☐ Understand how multisigs, timelocks, and governance mechanisms work in practice.
C. Security audits
☐ Read the full audit report rather than relying only on promotional images.
☐ Check the audited version against the version currently deployed.
☐ Understand the audit scope and how identified issues were handled.
☐ Do not interpret audit results as an absolute guarantee of security.
D. User authorizations
☐ Confirm which contract is being authorized and which asset is involved.
☐ Check the authorization amount and whether it is necessary.
☐ Read signature and transaction requests carefully.
☐ Regularly review authorizations you no longer need.
E. Ongoing verification
☐ Monitor important permission changes and upgrade records.
☐ Check whether verifiable evidence supports key developments announced by the project.
☐ Avoid making decisions based only on social media buzz or other people's recommendations.
☐ Be cautious about unusual operations you cannot explain.
If you cannot verify some of these points, you do not need to immediately conclude that something is wrong with the project. But you should trust it less, and avoid putting in funds you cannot afford to lose while the risks remain unclear.
VII. One Final Question Worth Considering: Who Should Prove That Something Is Safe?
Many projects want users to trust them.
They may showcase technical architecture, audit reports, partners, roadmaps, and extensive feature descriptions.
But from a user's perspective, what really matters is whether this information can be verified.
A Web3 project worth taking seriously should, at a minimum, be as clear as possible in answering the following questions:
Which features have already been implemented?
Which features are still in development?
Which permissions are controlled by the team?
Which risks remain?
How can users verify things independently?
This does not mean every project must use exactly the same technical architecture, or that fewer permissions always mean greater security.
The key is to help users understand how the system actually works and what risks they need to bear.
We should hold ONEA to the same standard: when discussing features that have been implemented, provide verifiable evidence; when discussing future plans, clearly distinguish plans from actual results, and do not present a vision as an accomplished fact.
In Web3, trust should not come from promises alone. It should be built on evidence that is continuous, independent, and verifiable.
Discussion
Suppose you are about to use a DeFi protocol you have never encountered before. Which of the following would you most want to verify first?
A. Whether the smart contract has been independently audited, and whether the audit report corresponds to the current version.
B. Whether administrators have the authority to upgrade, pause, or change key parameters.
C. What authorizations you need to sign, and what actions the contract can perform after authorization.
D. Whether the project's publicly stated features, fund movements, and major updates can be verified through on-chain records.
Feel free to choose an option in the comments, or share what you think is the risk most easily overlooked by everyday users.
If you find this checklist useful, save it and review it again before connecting to an unfamiliar Web3 protocol next time.
Coming next: What is the difference between blacklists, whitelists, transfer pauses, and trading restrictions? How should everyday users assess what these mechanisms mean for their assets?
Disclaimer: This article is for Web3 technical knowledge and security risk education only. It does not constitute investment advice or a guarantee of the security of any project. Smart contract audits, source code verification, and public on-chain records all have their limitations. Before taking any on-chain action, independently verify the address, permissions, and transaction details, and assess the risks yourself.
