# Protocol Announcements Published articles for Protocol Announcements. This is one page of public article previews, not the complete archive. Follow Next page to continue. Summaries are not the original full articles. ## Announcing the Platåberget Testnet DevFeed: [Announcing the Platåberget Testnet]() Original publisher: [Read original article]() Author: Protocol DevOps Published: 2026-08-17T00:00:00Z Content type: news Language: en Sources: [Ethereum Foundation Blog]() Topics: [Ethereum](), [Tooling](), [Network]() Tags: [ethereum](), [network](), [protocol-announcements](), [scale](), [tooling](), [validation]() ### AI overview The Platåberget testnet is an early, publicly joinable testing ground for Ethereum's Glamsterdam upgrade. It is intended to run for several months so the community can test post-Glamsterdam changes, including consensus and execution-layer changes, gas repricings, block-level access lists, larger contracts, and updated consensus data structures. Tools that hardcode maximum gas limits, including wallets, indexers, and gas estimators, will need updates. ### Source excerpt tl;dr: Meet Platåberget: Glamsterdam's (Gloas + Amsterdam) early testing ground open to public participation. This upgrade comes with breaking changes for application developers. Notably, any tool that relies on a hardcapped maximum gas limit (think wallets, indexers and gas estimators) will break and needs to be updated. Please use this... ## Fusaka Mainnet Announcement DevFeed: [Fusaka Mainnet Announcement]() Original publisher: [Read original article]() Author: EF Protocol Support Published: 2025-11-06T00:00:00Z Content type: release Language: en Sources: [Ethereum Foundation Blog]() Topics: [Ethereum](), [networking](), [Availability](), [Protocol (disambiguation)](), [releases]() Tags: [2025](), [announcement](), [availability](), [capacity](), [ethereum](), [fees](), [improvements](), [network](), [networking](), [performance](), [protocol](), [protocol-announcements](), [releases](), [upgrade](), [upgrades](), [user-experience]() ### AI overview Ethereum's Fusaka network upgrade is scheduled for mainnet activation on December 3, 2025. It introduces PeerDAS to support higher blob throughput, along with execution- and consensus-layer optimizations and planned BPO parameter adjustments. ### Source excerpt Fusaka follows this year's Pectra upgrade, representing a major step forward in Ethereum's scaling roadmap that improves L1 performance, increases blob throughput, and enhances user experience. The Fusaka network upgrade is scheduled to activate on the Ethereum mainnet at slot 13,164,544 (December 3, 2025, 21:49:11 UTC). Fusaka also introduces... ## Fusaka Testnet Announcement DevFeed: [Fusaka Testnet Announcement]() Original publisher: [Read original article]() Author: EF Protocol Support Published: 2025-09-26T00:00:00Z Content type: news Language: en Sources: [Ethereum Foundation Blog]() Topics: [Ethereum](), [Network](), [networking](), [Availability](), [Protocol (disambiguation)](), [releases]() Tags: [announcement](), [availability](), [ethereum](), [network](), [networking](), [protocol](), [protocol-announcements](), [releases](), [scale]() ### AI overview Ethereum's Fusaka upgrade introduces PeerDAS and planned Blob Parameter Only forks to increase blob throughput while maintaining data-availability guarantees. The article announces activation schedules for the Holesky, Sepolia, and Hoodi testnets and describes expected scaling benefits for layer 2 rollups. ### Source excerpt Fusaka follows this year's Pectra upgrade, representing a major step forward in Ethereum's scaling roadmap by introducing PeerDAS and key improvements that enhance blob throughput, L1 performance, and user experience. This post announces the testnet activation schedule for the first three testnets, beginning with Holesky at slot 5,283,840 (October... ## Holešky Testnet Shutdown Announcement DevFeed: [Holešky Testnet Shutdown Announcement]() Original publisher: [Read original article]() Author: EF Protocol Support Published: 2025-09-01T00:00:00Z Content type: release Language: en Sources: [Ethereum Foundation Blog]() Topics: [Ethereum](), [Network](), [Testing](), [Protocol (disambiguation)]() Tags: [announcement](), [end-of-life](), [ethereum](), [network](), [protocol-announcements](), [upgrades]() ### AI overview The Ethereum Foundation announces the planned shutdown of the Holešky testnet after the Fusaka upgrade finalizes. Holešky will no longer receive support, and operators are directed to Hoodi or Sepolia depending on their testing needs. ### Source excerpt As previously announced, the Holešky testnet has reached its planned end-of-life date and will be sunset shortly. The vast majority of remaining validator nodes will be shut down 2 weeks after the Fusaka upgrade has finalized on Holešky. After this, Holešky will no longer be supported by client, testing or... ## Partial history expiry announcement DevFeed: [Partial history expiry announcement]() Original publisher: [Read original article]() Author: Matt Garnett Published: 2025-07-08T00:00:00Z Content type: release Language: en Sources: [Ethereum Foundation Blog]() Topics: [Ethereum](), [Blockchain](), [data]() Tags: [announcement](), [blockchain](), [disk-space](), [ethereum](), [protocol](), [protocol-announcements](), [snap](), [space](), [storage]() ### AI overview Ethereum execution clients now support partial history expiry under EIP-4444. Removing block data from before the Merge can reduce the disk space required for an Ethereum node by 300-500 GB, while full rolling history expiry remains in development. ### Source excerpt As of today, all Ethereum execution clients support partial history expiry in accordance with EIP-4444. While work on full, rolling history expiry is ongoing, users can expect to reduce the disk space required for an Ethereum node by 300-500 GB by removing the block data prior to the Merge. This... ## Pectra Mainnet Announcement DevFeed: [Pectra Mainnet Announcement]() Original publisher: [Read original article]() Author: EF Protocol Support Published: 2025-04-23T00:00:00Z Content type: release Language: en Sources: [Ethereum Foundation Blog]() Topics: [Ethereum](), [releases](), [Transactions](), [Authentication](), [Passkeys](), [Security]() Tags: [2025](), [abstraction](), [authentication](), [batching](), [ethereum](), [protocol-announcements](), [releases](), [security](), [upgrade]() ### AI overview The Pectra network upgrade is scheduled to activate on Ethereum mainnet on May 7, 2025. The article explains how EIP-7702 adds smart contract capabilities to externally owned accounts and outlines related safety mechanisms. ### Source excerpt The Pectra network upgrade is scheduled to activate on the Ethereum mainnet on May 07, 2025 at epoch 364032 (10:05:11 UTC)! Mainnet client releases are listed below.... ## Holesky and Hoodi Testnet Updates DevFeed: [Holesky and Hoodi Testnet Updates]() Original publisher: [Read original article]() Author: Tim Beiko Published: 2025-03-18T00:00:00Z Content type: release Language: en Sources: [Ethereum Foundation Blog]() Topics: [Ethereum](), [Network](), [releases](), [migration](), [Protocol (disambiguation)]() Tags: [ethereum](), [infrastructure](), [migration](), [network](), [node](), [protocol](), [protocol-announcements](), [releases](), [updates](), [upgrade]() ### AI overview Ethereum's Pectra testnet activation exposed client configuration issues and left Holesky unsuitable for full validator-lifecycle testing because of its large exit queue. The article announces Hoodi as a new testnet for validator testing, outlines the migration timeline, and describes the intended roles and end-of-life dates for Holesky, Sepolia, and Hoodi. ### Source excerpt The Pectra testnet activation revealed issues in clients with deposit contract configurations changes on Ethereum testnets. While Sepolia's recovery was straightforward and the network has since fully recovered, Holesky experienced extensive inactivity leaks as part of its recovery mechanism. The Holesky network has since then finalized, but the exited... ## Mekong Deprecation Announcement DevFeed: [Mekong Deprecation Announcement]() Original publisher: [Read original article]() Author: EF Protocol Support Published: 2025-03-06T00:00:00Z Content type: release Language: en Sources: [Ethereum Foundation Blog]() Topics: [Ethereum](), [Testing](), [Tooling]() Tags: [2025](), [announcement](), [developers](), [ethereum](), [lifecycle](), [protocol-announcements](), [testing](), [tooling](), [ux]() ### AI overview The Mekong devnet will be deprecated on March 7, 2025, as Ethereum's Sepolia and Holesky testnets now support testing of the Pectra upgrade. Developers and stakers are directed to alternative environments, including Sepolia, Holesky, local networks, and Ephemery. ### Source excerpt The Mekong devnet was meant to be a playground for wallet developers to experiment with UX changes and for stakers to gain confidence in the upcoming Pectra changes. The Pectra network upgrade has been activated on the Ethereum Sepolia and Holesky testnets. These networks can now be used to... ## Sepolia Pectra Incident Update DevFeed: [Sepolia Pectra Incident Update]() Original publisher: [Read original article]() Author: Tim Beiko Published: 2025-03-05T00:00:00Z Content type: news Language: en Sources: [Ethereum Foundation Blog]() Topics: [incident](), [Network](), [Deployment](), [Transactions](), [configuration](), [client]() Tags: [compatibility](), [configuration](), [deployment](), [incident](), [issue](), [network](), [protocol-announcements](), [transactions](), [update]() ### AI overview An issue with Sepolia's permissioned deposit contract disrupted transaction inclusion after the Pectra upgrade went live on the Sepolia testnet. The issue was specific to Sepolia's configuration, and validators deployed a fix that restored normal throughput. Node operators must upgrade their execution layer clients for compatibility. ### Source excerpt At 7:29 UTC today, on epoch 222464, the Pectra network upgrade went live on the Sepolia testnet. Unfortunately, an issue with Sepolia's permissioned deposit contract prevented many execution layer clients from including transactions in blocks. The root cause was identified within minutes, and client teams immediately began working on... ## Pectra Testnet Announcement DevFeed: [Pectra Testnet Announcement]() Original publisher: [Read original article]() Author: EF Protocol Support Published: 2025-02-14T00:00:00Z Content type: release Language: en Sources: [Ethereum Foundation Blog]() Topics: [Ethereum](), [releases](), [Transactions](), [Authentication](), [Hardware]() Tags: [announcement](), [ethereum](), [protocol-announcements](), [releases](), [transactions]() ### AI overview The article announces the Pectra upgrade's rollout on the Holesky and Sepolia testnets, describes a Holesky chain split caused by a client configuration issue, and outlines Pectra improvements for Ethereum accounts, validators, and Layer 2 scaling. It highlights EIP-7702 features including transaction batching, gas sponsorship, alternative authentication, spending controls, and recovery mechanisms. ### Source excerpt ... ## Dencun Mainnet Announcement DevFeed: [Dencun Mainnet Announcement]() Original publisher: [Read original article]() Author: EF Protocol Support Published: 2024-02-27T00:00:00Z Content type: release Language: en Sources: [Ethereum Foundation Blog]() Topics: [Ethereum](), [Network](), [Protocol (disambiguation)](), [releases]() Tags: [announcement](), [ethereum](), [improvements](), [network](), [protocol](), [protocol-announcements](), [releases](), [software](), [update]() ### AI overview The announcement states that the Dencun upgrade will activate on Ethereum mainnet at epoch 269568 on March 13, 2024, at 13:55 UTC. It introduces ephemeral data blobs through EIP-4844, or protodanksharding, intended to reduce Layer 2 transaction fees, and includes changes to Ethereum's consensus and execution layers. A later update notes Dencun-compatible client releases with performance and stability improvements. ### Source excerpt March 12, 2024 update: Since the initial publication of this post, several client teams have made Dencun-compatible releases containing significant performance and stability improvements. While previously announced versions are still considered sufficient for the upgrade, a column has been added to the Client Releases tables highlighting the latest recommended versions... ## Sepolia & Holesky Dencun Announcement DevFeed: [Sepolia & Holesky Dencun Announcement]() Original publisher: [Read original article]() Author: EF Protocol Support Published: 2024-01-24T00:00:00Z Content type: release Language: en Sources: [Ethereum Foundation Blog]() Topics: [Ethereum](), [releases](), [Network](), [Protocol (disambiguation)]() Tags: [ethereum](), [network](), [protocol](), [protocol-announcements](), [python](), [release](), [releases](), [update]() ### AI overview The Ethereum Dencun network upgrade activated on the Goerli testnet and was scheduled for deployment on the Sepolia and Holesky testnets. The upgrade introduces ephemeral data blobs through EIP-4844, also known as protodanksharding, intended to reduce L2 transaction fees. The article lists relevant client releases and upgrade specifications. ### Source excerpt Important update: since the initial publication of this post, Lodestar has published a new release, v1.15.0, which Holesky users must upgrade to prior to Dencun's activation on February 7th. Additionally, Prysm and Nimbus have both published highly recommended releases for Holesky. Prysm users are encouraged to use v4.2.1, and Nimbus... ## Goerli Dencun Announcement DevFeed: [Goerli Dencun Announcement]() Original publisher: [Read original article]() Author: EF Protocol Support Published: 2024-01-10T00:00:00Z Content type: release Language: en Sources: [Ethereum Foundation Blog]() Topics: [Ethereum](), [Network](), [Protocol (disambiguation)](), [releases]() Tags: [announcement](), [ethereum](), [protocol](), [protocol-announcements](), [releases](), [specifications]() ### AI overview The announcement states that the Dencun upgrade will activate on the Goerli testnet at 6:32 UTC on January 17, 2024. It describes EIP-4844 data blobs, other consensus and execution-layer changes, planned activation on Sepolia and Holesky if Goerli proceeds without major issues, and the end of Goerli support after mainnet activation. ### Source excerpt The blobs are coming: Dencun will go live on Goerli at 6:32 UTC on January 17, 2024. Dencun will be Goerli's last upgrade before core teams stop supporting it. More on this in a previous post. Assuming the Goerli upgrade goes well, the Sepolia and Holesky testnets will activate Dencun... ## Goerli Long Term Support Update DevFeed: [Goerli Long Term Support Update]() Original publisher: [Read original article]() Author: Protocol Support Published: 2023-11-30T00:00:00Z Content type: release Language: en Sources: [Ethereum Foundation Blog]() Topics: [Ethereum](), [Network](), [Testing](), [Tooling]() Tags: [ethereum](), [network](), [protocol-announcements](), [testing](), [tooling](), [upgrade]() ### AI overview This update announces that Goerli will stop being supported by Ethereum client and testing teams after the Dencun upgrade. Developers and users are advised to migrate to Sepolia or Holesky, while other testing needs can use local environments or Ephemery. ### Source excerpt March 18, 2024 update: The Dencun network upgrade successfully activated on the Ethereum mainnet on March 13, 2024. As per the original wording of this... ## Mainnet Shapella Announcement DevFeed: [Mainnet Shapella Announcement]() Original publisher: [Read original article]() Author: EF Protocol Support Published: 2023-03-28T00:00:00Z Content type: release Language: en Sources: [Ethereum Foundation Blog]() Topics: [Ethereum](), [releases](), [Network](), [API]() Tags: [announcement](), [api](), [beacon](), [consensus](), [ethereum](), [protocol-announcements](), [python](), [release](), [specifications](), [upgrade]() ### AI overview Ethereum's Shapella network upgrade was scheduled for mainnet activation on April 12, 2023. The upgrade combined Shanghai execution-layer changes, Capella consensus-layer changes, and Engine API changes, enabling full and partial validator withdrawals. ### Source excerpt Withdrawals are coming! The Shapella network upgrade will activate on the Ethereum network at epoch 194048, scheduled for 22:27:35 UTC on Apr. 12, 2023 Stakers & node operators should read this post as well as the Withdrawals FAQ From now until April 5th, the Ethereum Bug Bounty rewards have been... ## Goerli Shapella Announcement DevFeed: [Goerli Shapella Announcement]() Original publisher: [Read original article]() Author: EF Protocol Support Published: 2023-03-08T00:00:00Z Content type: news Language: en Sources: [Ethereum Foundation Blog]() Topics: [Ethereum](), [upgrade](), [Network](), [API](), [Specifications]() Tags: [announcement](), [ethereum](), [network](), [protocol-announcements](), [upgrade]() ### AI overview The Shapella network upgrade is scheduled to activate on the Goerli testnet on March 14, 2023. The upgrade enables validators to withdraw their stake from the Beacon Chain to the execution layer and introduces changes to the execution layer, consensus layer, and Engine API. ### Source excerpt Withdrawals are coming! The Shapella network upgrade will activate on the Goerli network at epoch 162304, scheduled for 10:25:36 PM UTC on Mar. 14, 2023 Stakers & node operators should read this post as well as the Withdrawals FAQ The Zhejiang testnet can be used to test Shapella functionality prior... ## Sepolia Shapella Announcement DevFeed: [Sepolia Shapella Announcement]() Original publisher: [Read original article]() Author: EF Protocol Support Published: 2023-02-21T00:00:00Z Content type: release Language: en Sources: [Ethereum Foundation Blog]() Topics: [Ethereum](), [upgrade](), [releases](), [API](), [Testing]() Tags: [api](), [ethereum](), [protocol-announcements](), [releases](), [test](), [upgrade]() ### AI overview The Ethereum Shapella network upgrade is scheduled for deployment on the Sepolia testnet on February 28, 2023. It enables full and partial validator withdrawals and introduces changes to the execution layer, consensus layer, and Engine API. ### Source excerpt Withdrawals are coming! The Shapella network upgrade will activate on the Sepolia network at epoch 56832, scheduled for 4:04:48 AM UTC on Feb. 28, 2023 Stakers & node operators should read this post as well as the Withdrawals FAQ The Zhejiang testnet can be used to test Shapella functionality prior... ## Ropsten Shutdown Announcement DevFeed: [Ropsten Shutdown Announcement]() Original publisher: [Read original article]() Author: EF Protocol Support Published: 2022-11-30T00:00:00Z Content type: release Language: en Sources: [Ethereum Foundation Blog]() Topics: [Ethereum](), [Networks]() Tags: [announcement](), [deprecated](), [end-of-life](), [ethereum](), [networks](), [protocol-announcements]() ### AI overview Ethereum's Ropsten test network was deprecated and scheduled for shutdown during December 15-31, 2022, as infrastructure support and validator participation declined. Rinkeby was identified as the next testnet to be sunset, with users encouraged to migrate to Goerli or Sepolia. ### Source excerpt As previously announced, the Ropsten network has been deprecated and will be shut down in the coming weeks. Over the past few months, infrastructure providers have gradually stopped supporting the network and validator participation rates have been steadily declining. **The vast majority of remaining validator nodes will be shut... ## Kiln Shutdown Announcement DevFeed: [Kiln Shutdown Announcement]() Original publisher: [Read original article]() Author: EF Protocol Support Published: 2022-09-09T00:00:00Z Content type: release Language: en Sources: [Ethereum Foundation Blog]() Topics: [Ethereum](), [Networks]() Tags: [announcement](), [deprecated](), [ethereum](), [network](), [protocol-announcements](), [upgrade]() ### AI overview Ethereum announces that the Kiln merge testnet will shut down during the week of September 12, 2022. Ropsten and Rinkeby are also deprecated, and users and developers are advised to migrate to Goerli or Sepolia. ### Source excerpt The Merge is happening soon! This post explains how and when the upgrade will happen, along with the client versions compatible with it. Kiln, an Ethereum merge testnet launched in early 2022, will be shut down during the week of September 12, 2022. Ropsten and Rinkeby are also deprecated and... ## Mainnet Merge Announcement DevFeed: [Mainnet Merge Announcement]() Original publisher: [Read original article]() Author: EF Protocol Support Published: 2022-08-24T00:00:00Z Content type: release Language: en Sources: [Ethereum Foundation Blog]() Topics: [Ethereum](), [upgrade](), [proof of work](), [Network](), [hash](), [JSON](), [Remote Procedure Call (RPC)]() Tags: [consensus](), [ethereum](), [execution](), [hash](), [json](), [network](), [node](), [proof-of-work](), [protocol-announcements](), [rpc](), [upgrade]() ### AI overview Ethereum's mainnet transition from proof-of-work to proof-of-stake, known as The Merge, was scheduled in two phases: the Bellatrix upgrade on the Beacon Chain followed by the Paris transition when the execution layer reached the specified Terminal Total Difficulty. ### Source excerpt Ethereum is moving to proof-of-stake! The transition, known as The Merge, must first be activated on the Beacon Chain with the Bellatrix upgrade. After this, the proof-of-work chain will migrate to proof-of-stake upon hitting a specific Total Difficulty value. The Bellatrix upgrade is scheduled for epoch 144896 on the Beacon... ## Sepolia Post-Merge Upgrade Announcement DevFeed: [Sepolia Post-Merge Upgrade Announcement]() Original publisher: [Read original article]() Author: EF Protocol Support Published: 2022-08-03T00:00:00Z Content type: release Language: en Sources: [Ethereum Foundation Blog]() Topics: [Ethereum](), [Protocol (disambiguation)](), [Networks](), [Security]() Tags: [announcement](), [ethereum](), [networks](), [protocol](), [protocol-announcements](), [upgrades]() ### AI overview The article announces a post-Merge execution-layer upgrade for the Sepolia testnet at block 1,735,371, expected on August 17, 2022. Node operators must upgrade their execution-layer clients before that block. The change adds EIP-2124 compatibility so nodes can identify peers that have completed The Merge; no other functionality is introduced or deprecated. ### Source excerpt The Sepolia testnet will undergo a post-merge execution layer (EL) upgrade at block 1735371, expected on August 17, 2022 The upgrade will cause EL clients on the network to disconnect from peers which have not transitioned to proof-of-stake. It does not add additional functionality beyond this. Sepolia node operators must... ## Goerli/Prater Merge Announcement DevFeed: [Goerli/Prater Merge Announcement]() Original publisher: [Read original article]() Author: EF Protocol Support Published: 2022-07-27T00:00:00Z Content type: release Language: en Sources: [Ethereum Foundation Blog]() Topics: [Ethereum](), [Network](), [JSON]() Tags: [announcement](), [ethereum](), [json](), [proof-of-work](), [protocol-announcements](), [rpc](), [update](), [upgrades]() ### AI overview The article announces that Goerli will merge with Prater for Ethereum's final testnet proof-of-stake transition. It describes the Bellatrix and Paris phases, their expected activation conditions, and the continued availability of Goerli validators for individual stakers. ### Source excerpt For the last testnet proof-of-stake transition, Goerli will merge with Prater. The combined Goerli/Prater network will retain the Goerli name post-merge. Bellatrix, the Prater upgrade readying it for The Merge will happen at epoch 112260, expected at 12:24PM UTC on August 4, 2022. After Bellatrix is activated, the Goerli/Prater merge... ## Sepolia Merge Announcement DevFeed: [Sepolia Merge Announcement]() Original publisher: [Read original article]() Author: EF Protocol Support Published: 2022-06-30T00:00:00Z Content type: release Language: en Sources: [Ethereum Foundation Blog]() Topics: [Ethereum](), [Network](), [releases]() Tags: [beacon](), [consensus](), [ethereum](), [network](), [proof-of-authority](), [proof-of-work](), [protocol-announcements](), [releases]() ### AI overview Ethereum announces the next phase of the Sepolia testnet's transition from proof-of-work to proof-of-stake as part of The Merge. The transition is triggered by a Terminal Total Difficulty threshold, following the Bellatrix upgrade on the Sepolia Beacon Chain. ### Source excerpt Note: on July 5, 2022, the recommended releases for go-ethereum and Erigon were modified. See "Client Releases" for details. Sepolia will be the second of three public testnets to run through The Merge. The network will transition to proof-of-stake when the total difficulty on the proof-of-work chain exceeds 17,000,000,000,000,000, which... ## Ropsten, Rinkeby & Kiln Deprecation Announcement DevFeed: [Ropsten, Rinkeby & Kiln Deprecation Announcement]() Original publisher: [Read original article]() Author: EF Protocol Support Published: 2022-06-21T00:00:00Z Content type: release Language: en Sources: [Ethereum Foundation Blog]() Topics: [Ethereum](), [migration](), [Protocol (disambiguation)]() Tags: [announcement](), [deprecated](), [developers](), [ethereum](), [migration](), [proof-of-work](), [protocol-announcements](), [upgrade]() ### AI overview Ethereum is deprecating the Kiln, Ropsten, and Rinkeby testnets as it focuses long-term maintenance on Goerli and Sepolia. The article provides their planned shutdown timelines and encourages users and developers to migrate to Goerli or Sepolia. ### Source excerpt Reminder: the Gray Glacier upgrade is scheduled for block 15,050,000, expected June 29, 2022 The Kiln Merge testnet, launched earlier this year, will be shut down shortly after the Ethereum mainnet's transition to proof-of-stake. Ropsten, Ethereum's longest-lived proof-of-work testnet, has transitionned to proof-of-stake. It will be shut down in Q4... [Next page]()