# Upgrade Pacaya Inbox protocol for bug fixing (v2)

**URL:** <https://community.taiko.xyz/t/upgrade-pacaya-inbox-protocol-for-bug-fixing-v2/3894>\
**Category:** 🔬 DAO Proposals\
**Created:** [January 14, 2026, 9:05am UTC](https://community.taiko.xyz/t/upgrade-pacaya-inbox-protocol-for-bug-fixing-v2/3894 "2026-01-14T09:05:10Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![odesium](https://yyz1.discourse-cdn.com/flex029/user_avatar/community.taiko.xyz/odesium/32/735_2.png) [@odesium](https://community.taiko.xyz/u/odesium)\
**Post date:** [January 14, 2026, 9:05am UTC](https://community.taiko.xyz/t/upgrade-pacaya-inbox-protocol-for-bug-fixing-v2/3894/1 "2026-01-14T09:05:10Z")

</div>

## Proposal description

* * *

This new proposal replaces **[https://dao.taiko.xyz/plugins/emergency-council/#/proposals/24. So please do not approve proposal 24.](https://dao.taiko.xyz/plugins/emergency-council/#/proposals/24)**

**The bug**

In **[TaikoInbox.sol](https://github.com/taikoxyz/taiko-mono/blob/taiko-alethia-protocol-v2.3.1/packages/protocol/contracts/layer1/based/TaikoInbox.sol)**, within the **[\_verifyBatches](https://github.com/taikoxyz/taiko-mono/blob/4146959fc6ffbfa6780b410bec3fbfb7f0bcd662/packages/protocol/contracts/layer1/based/TaikoInbox.sol#L594)** function, there is a **[for-loop](https://github.com/taikoxyz/taiko-mono/blob/4146959fc6ffbfa6780b410bec3fbfb7f0bcd662/packages/protocol/contracts/layer1/based/TaikoInbox.sol#L628)** that iterates to find the next batch to verify. If the next batch is not verifiable, the current implementation mutates some variables that live outside the loop scope. These side effects can corrupt the final verification result.

The fix ensures there are no such “dirty” side effects. When the next batch is not verifiable, the correct data is still written on-chain.

### Before this proposal:

Inbox Proxy (0x06a9Ab27c7e2255df1815E6CC0168d7755Feb19a)

→ PacayaForkRouter (0xbB1f830636e1A017b81C3E38b7f6219344149Eb7)  
→ TaikoInbox.sol (0xaF95C030c7b8994Ba9213B6A3964baa64E7dF9D8)

### After this proposal:

Inbox Proxy (0x06a9Ab27c7e2255df1815E6CC0168d7755Feb19a)

→ TaikoInbox.sol (0xB0600e011e02eD35A142B45B506B16A35493c3F5)

### Code Diff

\*\*[https://codediff.taiko.xyz/?addr=0xaF95C030c7b8994Ba9213B6A3964baa64E7dF9D8&newimpl=0xB0600e011e02eD35A142B45B506B16A35493c3F5&chainid=1](https://codediff.taiko.xyz/?addr=0xaF95C030c7b8994Ba9213B6A3964baa64E7dF9D8&newimpl=0xB0600e011e02eD35A142B45B506B16A35493c3F5&chainid=1)

Latest Status:\*\*

- **Status:** Executed

- **Type:** Emergency Proposal