Audits

Audited for zkLink Nova

Auditor	Time	Report	Description
Secure3 ABDK	Mar. 8th, 2024 Mar. 27th, 2024	Secure3_zklink_Nova_2024.3 ABDK_zkLink_Nova_2024.3	zkLink Nova is built upon ZK Stack, which uses the same code of zkSync Era. For the codes deployed on the primary chain used for ZKP verification, the auditors only audited the difference versus zkSync Era's source code. The auditors audited all the codes deployed on the secondary chains used for hosting users' fund and execute on-chain transactions.
Secure3	Apr. 8th, 2024	Secure3_zkLink_Nova_mergeToken & bridgeUpdate_2024.4	Multiple tokens with the same value can be merged into one token via the smart contracts deployed on the Nova network. Users can automatically merge and redeem tokens when depositing or withdrawing through the official rollup bridge.
Secure3	Apr. 13th, 2024	Secure3_zkLink Nova Arbitrator Upgrade_2024.4	This upgrade optimized the cost of synchronizing the batch root hash from the primary chain to the all other secondary chains. Batch root hashes are compressed to a single hash, so that the number of messages that forward via Ethereum can be be greatly reduced.

Audited for zkSync Era

Auditor	Time	Report	Description
OpenZeppelin	Jan. 2024	zkSync Era Governance Audit Report	zkLink Nova applies the same Governance contract used by zkSync Era. It is implemented to slow down the execution of protocol changes.