Overview
MegaETH network upgrade history — hardfork timeline from MiniRex through Rex7 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
MiniRex
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.
Rex
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
Rex1
1766147599 (Dec 19, 2025, 12:33 UTC)
1766282400 (Dec 21, 2025, 02:00 UTC)
Fix: compute gas limit reset between transactions
Rex2
1770116400 (Feb 3, 2026, 11:00 UTC)
1770246000 (Feb 4, 2026, 23:00 UTC)
SELFDESTRUCT re-enabled (EIP-6780), KeylessDeploy system contract
Rex3
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
Rex4
1776400000 (Apr 17, 2026, 04:26 UTC)
1776659200 (Apr 20, 2026, 04:26 UTC)
Per-call-frame resource budgets, relative gas detention, storage gas stipend, MegaAccessControl, MegaLimitControl, sandbox environment inheritance.
Rex5
1780459200 (Jun 3, 2026, 04:00 UTC)
1780632000 (Jun 5, 2026, 04:00 UTC)
SequencerRegistry system contract, Oracle v2.0.0 with dynamic system address, caller-account update deduplication for data size and KV updates, storage gas stipend separated-allowance model, value-transfer CALL/CALLCODE parent compute gas attribution, CREATE code-deposit compute-gas atomicity, EIP-2935/EIP-4788 pre-block gas floor with fail-closed block rejection, CREATE2 empty-initcode short-circuit, KeylessDeploy trailing-bytes rejection, sandbox resource accounting, and empty-code log forwarding, precompile compute gas correction, EIP-7702 state growth tracking, non-delegating metering inspection, SELFDESTRUCT beneficiary accounting.
Rex6
1786330800 (Aug 10, 2026, 03:00 UTC)
1787626800 (Aug 25, 2026, 03:00 UTC)
Unified per-opcode gas metering order, consolidated EIP-7702 authorization accounting with dynamic SALT account-creation gas for net-new authorities, CREATE-frame accounting corrections, KeylessDeploy sandbox hardening, post-execution fee-reward accounting, system-originated transaction metering exemption, extended beneficiary detention / volatile-access coverage, per-log data size base, forwarded-gas return on compute-limit halts, value self-transfer account-info dedup, SequencerRegistry v2.0.0 rotation hardening (EIP-712 possession proof + minimum rotation delay).
Rex7
Not yet scheduled
Not yet scheduled
Unstable; under active development. No behavioral change over Rex6 yet.
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 contract authors and integrators need to know
Safety and Compatibility — Backward-compatibility boundaries and failure-mode differences
References — Links to the normative spec and related documentation
Last updated