OpenZeppelin Completes Full Re-Audit of Blast Bridge Timelock Contracts

Smart contract evaluation firm OpenZeppelin published its final verification report on the updated layer-2 bridging infrastructure of Blast.io on Tuesday. The assessment focused on contract-level timelock logic and emergency pause capabilities governing deposits bridging from Ethereum mainnet.

Documents filed in the firm public security repository show researchers examined five distinct smart contract modules between December and January. The formal review followed an architecture proposal by the core team to restrict unilateral administrative upgrades.

Multi-signature threshold modifications

Engineers instituted a mandatory 48-hour delay for parameter adjustments across bridge custody contracts. The previous design permitted a 24-hour execution window, which external researchers flagged as tight for community verification during weekend events.

Auditors also verified a five-of-seven multisig quorum requirement for contract revisions. Three keys remain held by institutional custody partners based in Delaware and Wyoming, while the remaining four reside with protocol core contributors.

• Timelock buffer expanded to 48 hours across all token escrow contracts.
• Multisig quorum remains fixed at five of seven authorized signers.
• Re-entrancy guards renewed on native ether deposit endpoints.

The lengthened timelock ensures ecosystem participants can observe and evaluate pending administrative transactions well before execution.

Alicia Thorne, Lead Systems Auditor at OpenZeppelin

Extending the operational delay window gives the entire community actionable visibility over custody transactions.

Alicia Thorne, Lead Systems Auditor at OpenZeppelin

Remaining implementation steps

Treasury operations will now undergo automated verification through continuous monitoring tools connected to the Ethereum mempool. The core engineering team confirmed that bug bounty payouts on Immunefi for bridge vulnerabilities remain capped at two million dollars.

Independent verification nodes operated by infrastructure partners will begin broadcasting timelock queue notices directly to a public registry starting next week.