Prysm Ethereum Client
@prylabs
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Core implementation of @ethereum protocol, a product of @OffchainLabs . See here for our code:
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Introducing our next test network release:
💎 The Topaz Testnet 💎
☑️ 32 ETH deposits
☑️ Full mainnet configuration
☑️ Latest ETH2 phase 0 spec v0.11.1
☑️ Built on Goerli 💪
☑️ 70+ contributors
Send your test deposits now!
Genesis in a few days🧑💻
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We are announcing v4.0.3-hotfix. This release contains the optimization to prevent the beacon node from high resource usage during turbulent times. It is highly recommended to upgrade if your node is under heavy usage.
See release notes for more info:
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💎 Prysm Phase 0 Testnet is here! 💎
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The latest development update is out! We are getting very close to a Prysm test net! 💎
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Introducing our next test network release:
💎The Onyx Testnet💎
✔️32 ETH deposits
✔️Full mainnet configuration
✔️Latest ETH2 phase 0 spec v0.12.1
✔️Multiclient ready
✔️80+ contributors
Send your test deposits now! 📨
Genesis in a few days ⏰
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Here is what happened to the Medalla testnet this past weekend, along with root cause analysis and our detailed plans moving forward.
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🎉 We are proud to promote Prysm to v1.0.0, it is ready for mainnet on December 1st, 2020
Check release notes for changes:
Follow our doc portal for guides:
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Latest sharding update is out!
💎 Rebranding as an ethereum 2.0 team, renaming from geth-sharding to Prysm
💎 Latest merged code, pull requests, and issues
💎 Discussion on upcoming work
💎 New grant from Wanxiang Blockchain Labs
@WXblockchain
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🥁🥁🥁 bi-weekly update is out! In this update we went over:
💎 Latest merged code, pull requests, and issues
💎 Future work
💎 Eth2.0 client implementers call
#1
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New week, new development updates! This week:
🔸Massive bug fixes & efficiency improvements
🔸Optimize LMD GHOST fork choice rule
🔸New benchmark numbers
🔸Simple Serialize Caching
🔸Integrating spec v0.6 to run time, and more!
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New release alert!
We are announcing v4.0.4. This release contains many optimizations since the last one. This is the first full release following the recent mainnet issue. It's highly recommended to upgrade to his release immediately.
Release notes:
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🚨 Attention Prysm + Geth users! 🚨
Please hold off on updating Geth to v1.13.0 A bug has been identified in Geth that interferes with block production from Prysm.
Note: While most clients don't need local production with mev-boost, Prysm always validates against the local…
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🐼v3.0.0 is here🐼
This is our mainnet merge release! All mainnet users MUST upgrade to the v3.0.0 release before the Bellatrix fork by Sep 6, 2022. Please visit release notes and documentation for further details ❤️
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New release drop!
v4.0.5 is a strongly recommended release with many significant optimizations. Release notes:
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📣 Latest development update is here!
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We have released Prysm v4.0.2. It includes a critical fix when the validator interacts with mev-boost. It's mandatory to upgrade if you are running mev-boost. V4.0.2 also contains misc optimizations and fixes. See release notes for detail.
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🚨 Please update Prysm to v1.3.8-hotfix-6c0942
This release contains two critical fixes to resolve on-going issues in mainnet
See release note for further details and the full retrospective will be coming in the next few days
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We are pleased to announce that we’ve selected
@Quantstamp
as our vendor for our first Prysm security audit! We received so many amazing proposals and met with many teams over the last two weeks.
@Quantstamp
really stood out to us and we are really excited to work with them!
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Gm fam! Our community update is back! Get it while it's fresh. Merge 🔜
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💎New release alpha.22 is up 💎
Thread ⬇️
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Read this and get ready for the merge! 🐼
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💎New release beta.1 is up💎
See release page for notable changes:
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Gm! We are releasing v3.1.1. It contains a fork choice bug fix which could lead to a memory leak and a gossipsub optimization. It's highly recommended you upgrade to this before the merge:
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New Prysm Release V4.2.0🎉
Highly recommended upgrade! Now includes support for Cancun on Goerli. Details:
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🎉New Prysm release v3.2.1🎉
This is our first official release for supporting the upcoming Capella / Shanghai network upgrade. It’s *mandatory on Sepolia testnet* & *recommended on Mainnet*. Change log & release binaries:
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Announcing v4.0.0 for the upcoming Shapella upgrade!
This release is mandatory for all the mainnet beacon nodes and validators. You must upgrade before April 12. See release notes for further detail.
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Earlier today, Prysm Beacon Nodes were unable to produce blocks for a period of 18 epochs (~2hours). This incident was widespread and resolved itself without intervention. Here's an initial update on our investigation.
Thread👇
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Our view on client diversity ♥️
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💎New release alpha.23 is up 💎
This release stabilizes the sync process, and has number of critical fixes (see full release notes below)
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An update on the mainnet block proposal incident!
The
@prylabs
team believes the incident is an extremely rare edge case. We have identified a potential solution, but we are working on increasing confidence to the highest level before issuing any emergency release.
Thread 👇
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⌛Onyx genesis time
2020-06-14 05:17:24 UTC
40 more hours until take off 🚀
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Prysm pre-genesis patch release!
- Several fixes in Prysm's UI
- Added more default bootnodes
- Updated go-ethereum version
- Log improvements
- And more
We recommend users update to this version. Please read the release notes:
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Announcing Prysm v5.0.0 with official Deneb support on Ethereum mainnet!
Release notes for details:
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💎New release alpha.29 is up💎
See release page for notable changes
2
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New Prysm release v4.0.8 🎉
This release is recommended. See release notes for details:
5
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🎉 New release v1.1.0 and it includes several significant changes.
Updating to this release is recommended at your earliest convenience, it is important to read the release notes before upgrading.👇
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March development update 💎
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Monthly update is out. Exciting times ahead! 💎
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The post mortem for the Shapella incident is out:
Please don't hesitate to reach out with any questions
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📣Release day! v2.0.0 is here!
⚠️You must update your prysm node and validator to v2.0.0 before Oct 27, 2021 or you will fork from rest of the network!
Full change list is available here:
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Excited to announce v4.1.0! 🎉
- Deneb foundational support
- Reduced memory via Multi-Value Slices
- EIP-4881 for optimized block processing
- BLST 0.3.11 boosts portable build performance
- Multiarch Containers Preview live
Release notes: )
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New release drop!
v4.0.6 highly recommended to upgrade with bug fixes and optimizations to shorten block proposal time under various edge cases. Highlights:
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16
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New Prysm release v4.0.7 with lots of great optimizations! 🎉
It is highly recommended to upgrade. Release notes with more details:
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Prysmatic Labs is seeking an external security assessment of Prysm! If your team conducts security audits and are familiar with ETH2, send us an email!
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Prysm v2 changes summarized below👇🏻 Everything you need to know with Altair hard fork, new slasher and more
Exciting times ahead! 💎
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🐼Gm! We are excited to announce v3.1.0. It contains several bug fixes from v3.0.0. It's highly recommended to upgrade to v3.1.0 before the merge date. Release note for more info:
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Prysm release v1.0.5 🎉
Updating to this release is highly recommended
Notable changes:
- Reduced disk I/O in validator client
- libp2p updated to 0.12.0
- Fallback option for eth1 nodes
See release notes for full change log:
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We have a new release v3.1.2! 🎉
This release includes several bug fixes and improvements since the merge. We recommend upgrading at your earliest convenience!
Release notes:
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Our new post summarizes we have accomplished in 2020 and what we have in the pipeline for 2021 ✨
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We have a patch release out! 🛠️
Update to v4.1.1 to resolve the issues mentioned in the notes below:
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We are excited to announce that we have received a grant from the
@EF_ESP
to continue our work on Prysm. Check out this post for more details!
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Gm. Announcing v4.0.3 with some important bug fixes for users with the mev-boost code path and key manager.
Recommended upgrade for everyone, but it especially improves those two areas of the application.
Notes and change list can be found here:
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💎New release alpha.25 is up💎
See release page for notable changes
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💎New release alpha.28 is up💎
See release page for notable changes
0
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Prysm v1.3.7 release 🎉
This release contains bug fixes including changes to default cryptography library and upcoming changes for Altair network upgrade.
Updating to this release is strongly recommended.
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The Topaz Testnet Launch Party will be hosted by /r/ethstaker tomorrow at 7:30pm ET!
Join us as we celebrate the genesis of our latest testnet release!
The Topaz Testnet from
@prylabs
now has a genesis time of April 18th, 2020 at 00:00:00 UTC!
In this genesis, we accepted around 5000 external deposits from users in our discord. Wow! 🤯
Should we have a virtual launch party?
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New release v2.1.0 is here! 🎉
- Bellatrix (merge) support 🐼
- Web3signer support 🔑
- Early weak subjectivity sync support ⛓️
- Vectorized sha256 optimizations 🔥
- ... and many more optimizations + bug fixes!
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Our first release including a local demo of Ethereum 2.0 so far, is live!
Come check out the following:
💎 Spin up a beacon chain node from a genesis config
💎 Connect a validator to the beacon node
💎 Validator gets shuffled into a shard and slot
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Excited to release v5.0.2 with loads of optimizations, UX upgrades, and bug fixes!
We strongly recommend all operators upgrade as soon as possible!
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We have a new release v3.2.0! 🎉
New API endpoints! new optimizations! and new bug fixes! Get it while hot!
Release notes:
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0/ We are now hiring a remote, full-time, frontend and UX software engineer to work on the software behind the eth2 blockchain. Come join us
#Typescript
#UX
#Ethereum
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- 0/ Prysmatic Labs is currently hiring for embedded security engineer and software development engineer in test (SDET) roles to work on our Ethereum proof of stake implementation, Prysm
2
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💎New release beta.0.rc is up💎

See release page for notable changes:
1
17
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New release v2.1.2 is here! 🎉
- Updated to Golang v1.18.1
- Updated to go-libp2p v0.18.0
- Important bug fixes
- Enable a lot of useful optimizations which has been in internal testing for months
See release notes:
4
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💎New release alpha.24 is up💎
See release page for notable changes
0
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Prysm patch release v1.0.4 🎉
This optional release includes features like runtime db backup, load graffitis from file, sync improvements and more…!
See release notes for full change log:
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Announcing v2.1.4. This is our last v2 release before v3. The Merge is coming soon! 🐼
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⚠️Users using mev-boost must to upgrade to 4.0.2 urgently to stop missing blocks!
If you are unable to upgrade at this time, you can disable mev boost but make sure to disable builder in your proposer-settings flags on the validator client.
We have released Prysm v4.0.2. It includes a critical fix when the validator interacts with mev-boost. It's mandatory to upgrade if you are running mev-boost. V4.0.2 also contains misc optimizations and fixes. See release notes for detail.
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Prysm v1.2.2 release 🎉
This release includes several performance improvements that are important given the increasing state size. Updating to this release is highly recommended at your earliest convenience.
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gm
@LidoFinance
, we are confirming our team is joining Lido as a Node Operator, "Prysmatic Labs", with address 0x3bF3A9260fE18A1239767aC6F0F0bc7c1E5d1cBC
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9
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💎New release beta.3 is up💎
See release page for changes:
0
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💎June development update💎
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📣Prysm pre-genesis minor patch release!
This minor patch release includes two bug fixes.
- Better lookback period for initial sync
- Handle missing block metadata better
Updating to this release is recommended prior to genesis. Full change log:
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📢 New release alert!
v2.1.3-rc.0 is available. It's only intended for testnets with full support for the Ropsten beacon chain. See release notes for detail
2
8
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Latest development update! Made progresses on RANDAO, validator rotation, BLS signature aggregation and more!
1
13
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Prysm v1.3.1 release 📣
This patch release contains an important fix for an issue in v1.3.0 where some validator databases could not be upgraded
Upgrading to this patch is only recommended for validator databases that managed many validating keys
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Gm Sepolia testnet node operators! ☀️
Shapella hard fork is tomorrow! (2/28/2023, 4:04:48 AM UTC) 🍴
We have a new release that's ONLY for Sepolia testnet. Please do not use this release on Mainnet and other testnets. See release notes for more details.
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Gm Goerli node operators! We got a new release! ☀️
Shanghai / Capella hard fork is coming soon! (March 14 10:25:36 pm) 🍴
We have a new release that's mandatory for Goerli testnet, and low priority for mainnet.
See release notes for more details.
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December update is out! 💎
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New dev updates! lots on beacon chain and geth-sharding repo!
🔹Research notes leading up to the beacon chain
🔹Removing go-ethereum codebase & introducing bazel
🔹Integrating the beacon chain with the geth-sharding repo
🔹Libp2p work for ruby release
Ethereum Sharding Biweekly Development Update #8 — Prysmatic Labs
Latest Research Updates
medium.com
2
13
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New release 5.0.3! This is a patch release with enhancements and bug fixes.
It is recommended for those on versions 5.0.0 or 5.0.1 to upgrade.
4
18
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Time for a bi-weekly development update!
💎Sharding and Casper Being Merged Through a Full PoS, Random Beacon Chain
💎Simulator and Sync Services
💎Handling Collation Data Requests Between Nodes
💎Validator Registration Contract for Beacon Chain
Ethereum Sharding Biweekly Development Update #7 — Prysmatic Labs
Latest Research Updates
medium.com
3
17
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Latest biweekly update!
💎Prylabs at Devcon, did you see us?
💎Attestation aggregation!
💎41 Merged PRs (not goofing off at devcon)
💎Faster epoch processing
💎SSZ is better than ever
💎Getting dirty with Phase 2
0
13
43
Prysm v1.4.4 is out! 🎉

This is an encouraged update for mainnet beacon nodes and validators
See release note for more detail:
5
13
38
Prysm patch release v1.0.3!
This release includes a fix that prevented users from proposing when setting up their validator accounts through certain workflows like DAppNode
Updating to this release is required if your validator is missing block proposal
0
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April Development Updates:
🔹New sharding phase 1.1 spec
🔹New proposals on sharded P2P network, collation body serialization and local state storage
🔹A special thanks to
@SpankChain
for the donations!
0
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🚀Calling all Ethereum solo stakers!
🌐Participate in the
@ethStaker
survey and shape the future of solo staking. It takes less than 15 mins and fully anonymous.
🔗Survey link: ✅ Available in English, Mandarin, Spanish, & Italian. Whether you're on…
2
18
44
Prysm V2.0.0-rc.0 is out! 🎉
This is a REQUIRED update for all pyrmont nodes in ~3 days
This is NOT intended for current mainnet
See release note for more detail:
3
12
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May Development Updates:
🔹Latest research on proof of custody and safety notary pool size
🔹Merged Code, pull requests, and issues
🔹First Bounty Closed with
@GetGitcoin
on a sharded blockchain explorer
🔹Accepted into the
@AragonProject
grant program
0
15
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Prysm v1.3.11 release 🎉
This optional release contains a fix for the validator web interface as well as other improvements/fixes.
2
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🚨 Reminder to update Prysm node to v2.0.2 before Oct 27
Upgrade guide
Any questions? Hop in our Discord. We are here to help!
4
12
29
Hey everyone! The latest development update is out!
💎 Latest research on sharding + casper 2.1 and p2p msg serialization standard
💎 Merged code, pull requests and issues
💎 Upcoming work
0
10
32
Earlier this week, our Co-Founders
@preston_vanloon
and
@terencechain
sat down with the Bankless team to help unpack
#Ethereum
's non-finality event.
Check out the conversation below!👇
...So, did Ethereum break?
Co-Founders of
@prylabs
,
@preston_vanloon
, &
@terencechain
will unpack Ethereum's non-finality event
- DID ETHEREUM BREAK?☢️
- What happened? Big deal?
- What is ‘non-finality’?
- What risk do L2s have?
LIVE @ 12pm EST
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2
19
25
Prysm v2.0.6 release is out!💎
V2.0.6 is a patch release with a few features enabled, improvements to memory usage, JSON API fixes, and many other great changes🔥
Happy staking! and happy birthday
@VitalikButerin
!🎂
4
9
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Mainnet is stable and there is no action required or recommended at this time for Prysm operators. Stand by for a hotfix release in the coming hours.
Thanks for your support and understanding.
1
1
29
👋 Gm everyone! Prysm release v2.1.1 is out!
This is a *required* release for users on v2.1.0. The release includes three fixes for regressions found in v2.1.0.
Release notes:
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