Merge pull request #430 from gnosischain/main

Added Core devs call notes 19 April

updates/2023/04-19-core-devs-call.md

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+---
+title: Core Devs Call - 19/04/2023
+authors: [dapplion, armaganercan]
+tags: [CoreDevsCall, gnosis]
+---
+# Gnosis Core Devs Call Notes
+
+![](https://i.imgur.com/yWkAFed.png)
+
+Greetings everyone, and welcome to the weekly Gnosis Core Devs Call. Just a quick reminder that this meeting takes place every Wednesday.
+
+[Watch full record on YouTube](https://youtu.be/LInX7dJJ6Ak)
+
+Participants: Erigon, Gateway, Nethermind, Geth, Gnosis DevOps, Gnosis Core Devs, Gnosis DevRels, Gnosis Comms team and the contributors.
+
+April 19, 2023
+
+# Client Team Updates
+## EL
+* **Nethermind**: No updates. 
+* **Erigon**: No updates.
+* **Geth**: Was able to import the state (simulate snap sync)Is now starting the node in full sync, but it’s not connecting / downloading blocks. Once this is done, Guillaume should have a working prototype
+
+## CL
+* **Prysm**: No updates.
+* **Nimbus**: No updates.
+
+# Chain Infra
+**Gateway** 
+
+No peers found on Devnet (probably just the different genesis). Started provisioning an Optimism setup
+Bedrock Optimism. The same one will be reused for Oly
+
+# Devnet
+
+Wrong configuration was shared. There’s now a mismatch for outside nodes. There’s no Erigon node running at this point. 80% attestation rate (all nodes ran by Nethermind) Shapella went through
+**Lion: does Nethermind have metrics for the network?**
+I.e. withdrawal amounts per block etc. Apparently not.
+Might potentially be added. Most credentials are still 0x00. Meaning that no withdrawals are currently happening.
+
+# Research
+
+**Churn coefficient**
+https://hackmd.io/@dapplion/gnosis-churn-limit
+Defines the number of validators that can join or exit the network in a specific time frame. On Gnosis that number is a bit high, meaning that it would theoretically be possible to get a big stake in the network very quickly. This would require a consensus client code change. Technically a change on the deposit contract could also limit inflow. But that break a lot of assumptions. It doesn’t change anything in the case of outflows.Attacking the light client bridge is exclusively an inflow problem
+
+**Shutterized Beacon Chain: is there progress?**
+We’ve got more precise specs on a PR
+https://github.com/gnosischain/specs/pull/4
+Lion: how specific do you need the spec to be? It seems like EL clients have more lax requirements for specs, is that true? On CL everything is specced quite precisely.
+
+
+# Tests
+* **Hive**
+
+Will start writing Hive tests by the end of this week
+Improving the genesis loading for Erigon and Nethermind, but hasn’t been tested on Erigon yet. 
+**Lion: can we agree on which conditions tests would be considered good enough to move to testnet / mainnet?**
+Ruben thinks it would be enough if we can just run the contract specific parts (balances etc)
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