0x Protocol Token (ZRX) Smart Contract Risk
No Revert on Transfer Failure
⚠ HIGH severityVulnerability
ZRX returns false on failure instead of reverting. If the return value is ignored, failed transfers may go undetected.
Related: Unchecked Return Values
Safe integration
Always check the boolean return value, or use SafeERC20.
Contract addresses
| Chain | Address |
|---|---|
| Ethereum | 0xe41d2489571d322189246dafa5ebde1f4699f498 |
Audit any contract that interacts with ZRX: SmartContract.us automatically detects ZRX integration risks →
Chain & standard security guides
What this contract permits today
Read live from Ethereum on 2026-10-14. This is a different question from the integration risk above: not how to call the token safely, but what the holders of its keys are able to do to the people holding it.
| Question | Answer |
|---|---|
| Can new tokens be created? | No |
| Can transfers be blocked? | No |
| Is there a trading tax? | No |
| Can the logic be replaced? | No |
| Can liquidity be withdrawn? | Yes |
No privileged address could be identified. This is not the same as there being none — see the limitation below.