MIP-6

MONAD_NINE Network Upgrade

Final Meta Hardfork ⏶ MONAD_NINE hardfork GitHub ↗ Forum ↗

Idea Draft Review Last Call Final Living

Meta MIP for the `MONAD_NINE` network upgrade

Authors: Category Labs (@category-labs)
Created: 2026-01-22
Updated: Oct 22, 2026
Forum: 1p · 1♥

Stakeholder Impact

What this MIP changes for each audience. Severity and action flags are model-derived with deterministic floors per MIP type/category.

TL;DR

The MONAD_NINE network upgrade introduces several enhancements to the Monad network, aimed at improving functionality and performance. This upgrade is scheduled for activation on both the testnet and mainnet in March 2026.

What's Changing

MIP-3: Linear Memory - This proposal introduces a linear memory model to enhance data handling efficiency.
MIP-4: Reserve Balance Introspection - This allows for better visibility and management of reserve balances within the network.
MIP-5: Fusaka EIP Activation - This activates a specific Ethereum Improvement Proposal to integrate additional features.

⌘

Developers

Smart contract & dapp builders, RPC consumers, tooling authors

The inclusion of MIP-3, MIP-4, and MIP-5 introduces changes that may affect existing contracts, particularly with the new linear memory model and introspection features. Developers may need to review and potentially update their contracts to ensure compatibility with these changes.

Medium

◉

Users

Wallet users, EOA holders, dapp visitors

The MONAD_NINE network upgrade may introduce changes that could affect transaction fees and confirmation speeds, but specific details are not provided. Users should monitor for any updates regarding these aspects as the activation date approaches.

Medium

◆

Validators

Node operators, RPC operators, delegators

The MONAD_NINE network upgrade is a mandatory client upgrade that will require validators to update their software to continue participating in the network. This upgrade may also affect validator revenue depending on the specifics of the included MIPs, particularly if they alter fee structures or reward distributions.

High action required

✦

Foundation

Monad Foundation & Category Labs core devs

The MONAD_NINE network upgrade requires coordination for activation across multiple clients and partners, as well as communication regarding the changes and their implications. This sets a precedent for future upgrades and their governance processes.

High action required

Generated Oct 28, 2026, 9:14 AM · model: gpt-4o-mini

Specification

Subsystems consensus evm


## Abstract

This Meta MIP specifies the changes included in the `MONAD_NINE` revision of the
Monad network.

## Specification

### Included MIPs

- [MIP-3: Linear Memory](./MIP-3.md)
- [MIP-4: Reserve Balance Introspection](./MIP-4.md)
- [MIP-5: Fusaka EIP Activation](./MIP-5.md)

### Activation

| Network | Activation Timestamp |
|---------|---------------------|
| Monad Testnet | `1773153000` (Mar 10, 2026, 14:30 UTC) |
| Monad Mainnet | `1773930600` (Mar 19, 2026, 14:30 UTC) |

## Rationale

This upgrade includes:

- [MIP-3: Linear Memory](./MIP-3.md)
- [MIP-4: Reserve Balance Introspection](./MIP-4.md)
- [MIP-5: Fusaka EIP Activation](./MIP-5.md)

## Security Considerations

Deferred to the individual MIPs included.

## Copyright

Copyright and related rights waived via [CC0](../LICENSE.md).

Forum discussion

1 posts · 1 likes · 10 months ago