Glamsterdam follows the Fusaka improve, advancing Ethereum’s L1 scaling roadmap with enshrined proposer-builder separation, block-level entry lists, and adjustments to fuel pricing that higher replicate the price of execution and state development.
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 desk under for the deployment schedule. Hoodi and mainnet activation dates haven’t but been determined.
Sepolia-compatible consumer variations can be added to the consumer launch tables as they’re confirmed. Node operators should replace each their execution and consensus layer purchasers earlier than activation.
Glamsterdam Overview
Glamsterdam combines the Amsterdam execution layer improve with the Gloas consensus layer improve. Its headlining adjustments are enshrined proposer-builder separation (ePBS) and block-level entry lists (BALs), which change how blocks are produced and validated to help larger 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 fee to the proposer, decreasing reliance on trusted middleware for the alternate 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 whether the builder revealed its payload and the corresponding blob knowledge was obtainable on time. Validator operators and groups sustaining builder infrastructure ought to assessment the brand new duties and interfaces earlier than the improve.
Block-Stage Entry Lists
EIP-7928 introduces enforced block-level entry lists that document the accounts and storage places accessed throughout a block, along with post-transaction state adjustments. These lists permit purchasers 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 maintaining block validation sensible for node operators.
Gasoline Pricing and State Development
Glamsterdam adjusts fuel accounting to raised replicate useful resource utilization. EIP-8037 will increase and individually meters the price of creating state, whereas EIP-8038 updates state-access prices. Extra adjustments cowl intrinsic transaction fuel, calldata, entry lists, and block fuel accounting.
Software builders ought to check contracts and fuel estimation in opposition to the brand new guidelines. Contracts that depend on fastened fuel stipends, hardcoded fuel limits, or assumptions about remaining fuel might have adjustments. See the Glamsterdam repricing affect information for the affected-contracts search and testing steering.
Developer and Validator Enhancements
Glamsterdam additionally contains ETH switch logs, a slot-number opcode, the next most contract measurement, a deterministic manufacturing facility contract, and new stack-manipulation directions. Consensus adjustments embrace forward-compatible knowledge buildings, excluding slashed validators from proposing, and elevated exit and consolidation churn. The whole scheduled EIP record is under.
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 lively for Glamsterdam specs and EIPs. Shopper implementations grow to be eligible as quickly as their releases are added to the consumer launch tables under. 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 replace to EIP-7773, is:
Hoodi and mainnet activation occasions can be introduced as soon as determined by consumer groups. This announcement covers Sepolia; it doesn’t schedule a mainnet improve.
Shopper Releases
Sepolia-compatible consumer releases are listed under. The tables can be up to date as further releases grow to be obtainable. Solely use a launch whose notes explicitly verify help for the scheduled Glamsterdam activation on Sepolia.
Consensus Layer Sepolia Releases
When working a validator, each the Consensus Layer Beacon Node and Validator Shopper have to be up to date.
Prysm 7.2.0 helps the Sepolia fork however defaults to a 60M fuel restrict after activation. Validators wishing to suggest with a 200M fuel 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 launch notes for directions.
Execution Layer Sepolia Releases
Builder and validator tooling compatibility steering can be added as soon as confirmed for Sepolia. Operators utilizing exterior block-building infrastructure must also assessment its Glamsterdam-specific improve directions.
FAQ
How do Ethereum community upgrades work?
Ethereum community upgrades require express opt-in from node operators. Shopper builders coordinate the protocol adjustments, and validators and non-staking nodes replace their software program to help them.
A node that doesn’t help the brand new guidelines can’t comply with the upgraded community after activation. Coordinating these updates is subsequently important for a profitable improve.
For a extra exhaustive overview of Ethereum’s governance course of, see this discuss by Tim Beiko.
As an Ethereum mainnet consumer or ETH holder, is there something I must do?
No. This announcement considerations Sepolia. A separate announcement will cowl Glamsterdam’s activation on mainnet.
As a non-staking Sepolia node operator, what do I must do?
Earlier than October 6, 2026 at 13:53:36 UTC, replace each your execution and consensus layer purchasers to releases that help the scheduled Sepolia activation. The consumer launch tables can be up to date as variations are confirmed.
As a Sepolia staker, what do I must do?
Replace your execution and consensus layer purchasers earlier than activation. Ensure each your beacon node and validator consumer are up to date. Overview your consumer’s improve directions for the brand new ePBS duties and any adjustments required to builder or validator tooling.
As a Hoodi or mainnet node operator or staker, what do I must do?
No motion is required for these networks on account of this Sepolia announcement. Their activation dates and appropriate consumer releases can be introduced individually.
As an utility or tooling developer, what ought to I do?
Overview the EIPs scheduled for Glamsterdam, check on Sepolia after activation, and verify whether or not adjustments to fuel accounting, logs, opcodes, or consumer interfaces have an effect on your venture. Particularly, comply with the repricing affect information to establish contracts that rely upon fastened fuel assumptions and replace fuel 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 situation of Devconnect in 2022.
