Overview
MegaETH network upgrade history — hardfork timeline from MiniRex through Rex4 with activation dates and behavioral deltas.
This section documents each MegaETH network upgrade, describing what changed, why, and what developers need to know.
Hardfork History
0 (Genesis)
0 (Genesis)
Dual gas model, multidimensional resource limits, gas detention, 98/100 gas forwarding, SELFDESTRUCT disabled, system contracts (Oracle, Timestamp)
MiniRex1
N/A
1764845637 (Dec 4, 2025, 10:53 UTC)
Rollback: reverted to Equivalence spec (maps to EQUIVALENCE). The MiniRex features were deactivated on the network; no chain reorg or state rollback occurred. Contracts deployed during MiniRex remained on-chain.
MiniRex2
N/A
1764849932 (Dec 4, 2025, 12:05 UTC)
Restoration: re-activated MiniRex spec (maps to MINI_REX). All MiniRex features (dual gas model, resource limits, gas detention) were re-enabled.
1764694618 (Dec 2, 2025, 16:56 UTC)
1764851940 (Dec 4, 2025, 12:39 UTC)
Transaction intrinsic storage gas, revised storage gas economics (base × (multiplier − 1)), consistent CALL-like opcode behavior, state growth tracking
1766147599 (Dec 19, 2025, 12:33 UTC)
1766282400 (Dec 21, 2025, 02:00 UTC)
Fix: compute gas limit reset between transactions
1770116400 (Feb 3, 2026, 11:00 UTC)
1770246000 (Feb 4, 2026, 23:00 UTC)
SELFDESTRUCT re-enabled (EIP-6780), KeylessDeploy system contract
1771380000 (Feb 18, 2026, 02:00 UTC)
1771639200 (Feb 21, 2026, 02:00 UTC)
Oracle gas cap raised to 20M, SLOAD-based oracle detention, keyless deploy compute gas tracking
Upcoming (Unstable)
Per-call-frame resource budgets, relative gas detention, MegaAccessControl, MegaLimitControl, sandbox environment inheritance.
Rex4 is the current unstable specification and is subject to change before activation.
How to Read These Pages
Each upgrade page follows a consistent structure:
Summary — What changed and why
What Changed — Previous vs new behavior for each change
Developer Impact — What you need to care about
Safety and Compatibility — Backward-compatibility boundaries and failure-mode differences
References — Links to the normative spec and related documentation
Last updated