Glamsterdam follows the Fusaka upgrade, advancing Ethereum’s L1 scaling roadmap with enshrined proposer-builder separation, block-level entry lists, and modifications to gasoline pricing that higher mirror the price of execution and state progress.
The Glamsterdam community improve is scheduled to activate on Sepolia at epoch 353,024, slot 11,296,768 (October 6, 2026, 13:53:36 UTC). See the activation table beneath for the deployment schedule. Hoodi and mainnet activation dates haven’t but been determined.
Sepolia-compatible shopper variations will probably be added to the client release tables as they’re confirmed. Node operators should replace each their execution and consensus layer shoppers earlier than activation.
Glamsterdam Overview
Glamsterdam combines the Amsterdam execution layer improve with the Gloas consensus layer improve. Its headlining modifications are enshrined proposer-builder separation (ePBS) and block-level entry lists (BALs), which change how blocks are produced and validated to assist better L1 throughput.
Enshrined Proposer-Builder Separation
EIP-7732 brings the separation between block proposers and builders into Ethereum’s consensus protocol. A proposer features a builder’s dedication to an execution payload, and the builder subsequently reveals that payload. The protocol handles cost to the proposer, decreasing reliance on trusted middleware for the trade between proposers and builders.
The change additionally separates consensus validation from execution validation, giving validators extra time to validate execution payloads. A payload timeliness committee attests as to if the builder revealed its payload and the corresponding blob knowledge was accessible on time. Validator operators and groups sustaining builder infrastructure ought to assessment the brand new duties and interfaces earlier than the improve.
Block-Degree Entry Lists
EIP-7928 introduces enforced block-level entry lists that report the accounts and storage areas accessed throughout a block, along with post-transaction state modifications. These lists permit shoppers to learn state from disk in parallel, validate transactions in parallel, and compute state roots extra effectively.
Collectively, ePBS and BALs present a basis for scaling execution capability whereas retaining block validation sensible for node operators.
Fuel Pricing and State Progress
Glamsterdam adjusts gasoline accounting to raised mirror useful resource utilization. EIP-8037 will increase and individually meters the price of creating state, whereas EIP-8038 updates state-access prices. Extra modifications cowl intrinsic transaction gasoline, calldata, entry lists, and block gasoline accounting.
Software builders ought to take a look at contracts and gasoline estimation in opposition to the brand new guidelines. Contracts that depend on fastened gasoline stipends, hardcoded gasoline limits, or assumptions about remaining gasoline may have modifications. See the Glamsterdam repricing impact guide for the affected-contracts search and testing steering.
Developer and Validator Enhancements
Glamsterdam additionally consists of ETH switch logs, a slot-number opcode, the next most contract dimension, a deterministic manufacturing unit contract, and new stack-manipulation directions. Consensus modifications embody forward-compatible knowledge constructions, excluding slashed validators from proposing, and elevated exit and consolidation churn. The entire scheduled EIP checklist is beneath.
Glamsterdam Specs
EIP-7773 tracks the Glamsterdam improve. The next EIPs are scheduled for inclusion:
EIP-7773 additionally lists supporting networking and informational EIPs:
Glamsterdam Safety
The Ethereum Bug Bounty Program is now energetic for Glamsterdam specs and EIPs. Consumer implementations grow to be eligible as quickly as their releases are added to the client release tables beneath. See the Ethereum Bug Bounty Program for extra data, together with reward multipliers and reporting necessities.
Glamsterdam Activation
The agreed deployment schedule, mirrored within the Sepolia activation update to EIP-7773, is:
| Community | Epoch | Slot | UTC Time | UNIX Timestamp |
|---|---|---|---|---|
| Sepolia | 353,024 | 11,296,768 | 2026-10-06 13:53:36 | 1791294816 |
| Hoodi | TBD | TBD | TBD | TBD |
| Mainnet | TBD | TBD | TBD | TBD |
Hoodi and mainnet activation instances will probably be introduced as soon as determined by shopper groups. This announcement covers Sepolia; it doesn’t schedule a mainnet improve.
Consumer Releases
Sepolia-compatible shopper releases are listed beneath. The tables will probably be up to date as extra releases grow to be accessible. Solely use a launch whose notes explicitly verify assist for the scheduled Glamsterdam activation on Sepolia.
Consensus Layer Sepolia Releases
When working a validator, each the Consensus Layer Beacon Node and Validator Consumer have to be up to date.
Prysm 7.2.0 helps the Sepolia fork however defaults to a 60M gasoline restrict after activation. Validators wishing to suggest with a 200M gasoline restrict should configure it explicitly utilizing model 2 proposer settings or the keymanager API; –suggested-gas-limit has no impact after Gloas. See the Prysm release notes for directions.
Teku 26.9.1 helps the Sepolia fork however defaults to a 60M gasoline restrict after activation. Validators wishing to suggest with a 200M gasoline restrict should configure it explicitly utilizing –validators-builder-registration-default-gas-limit=200000000. See the Teku docs for particulars.
Execution Layer Sepolia Releases
Builder and validator tooling compatibility steering will probably be added as soon as confirmed for Sepolia. Operators utilizing exterior block-building infrastructure also needs to assessment its Glamsterdam-specific improve directions.
FAQ
How do Ethereum community upgrades work?
Ethereum community upgrades require express opt-in from node operators. Consumer builders coordinate the protocol modifications, and validators and non-staking nodes replace their software program to assist them.
A node that doesn’t assist the brand new guidelines can not comply with the upgraded community after activation. Coordinating these updates is due to this fact important for a profitable improve.
For a extra exhaustive overview of Ethereum’s governance course of, see this talk by Tim Beiko.
As an Ethereum mainnet person or ETH holder, is there something I have to do?
No. This announcement considerations Sepolia. A separate announcement will cowl Glamsterdam’s activation on mainnet.
If you would like to look at the improve go stay, you may be a part of the online viewing party!
As a non-staking Sepolia node operator, what do I have to do?
Earlier than October 6, 2026 at 13:53:36 UTC, replace each your execution and consensus layer shoppers to releases that assist the scheduled Sepolia activation. The client release tables will probably be up to date as variations are confirmed.
As a Sepolia staker, what do I have to do?
Replace your execution and consensus layer shoppers earlier than activation. Ensure each your beacon node and validator shopper are up to date. Evaluate your shopper’s improve directions for the brand new ePBS duties and any modifications required to builder or validator tooling.
As a Hoodi or mainnet node operator or staker, what do I have to do?
No motion is required for these networks because of this Sepolia announcement. Their activation dates and appropriate shopper releases will probably be introduced individually.
As an software or tooling developer, what ought to I do?
Evaluate the EIPs scheduled for Glamsterdam, take a look at on Sepolia after activation, and verify whether or not modifications to gasoline accounting, logs, opcodes, or shopper interfaces have an effect on your undertaking. Specifically, comply with the repricing impact guide to establish contracts that rely upon fastened gasoline assumptions and replace gasoline estimation the place wanted.
Why “Glamsterdam”?
Execution layer upgrades are named after Devcon or Devconnect host cities, and consensus layer upgrades use star names. Glamsterdam combines Gloas and Amsterdam, the placement of Devconnect in 2022.
