# Ethereum Metropolis and Byzantium Development Roundup

DevFeed: [Ethereum Metropolis and Byzantium Development Roundup](<https://devfeed.tech/articles/roundup-6-16812.md>)

Original publisher: [Read original article](<https://blog.ethereum.org/en/2017/10/09/roundup-6>)

Author: Ethereum Foundation

Published: 2017-10-09T09:55:53Z

Content type: news

Language: en

Sources: [Ethereum Foundation Blog](<https://devfeed.tech/sources/ethereum-foundation-blog.md>)

Topics: [Ethereum](<https://devfeed.tech/topics/ethereum.md>), [Metropolis](<https://devfeed.tech/topics/metropolis.md>), [resharper](<https://devfeed.tech/topics/resharper.md>), [rust refactoring](<https://devfeed.tech/topics/rust-refactoring.md>), [Algorithms, Complexity](<https://devfeed.tech/topics/algorithms-complexity.md>)

Tags: [code](<https://devfeed.tech/tags/code.md>), [cryptographic](<https://devfeed.tech/tags/cryptographic.md>), [deadlock](<https://devfeed.tech/tags/deadlock.md>), [documentation](<https://devfeed.tech/tags/documentation.md>), [ethereum](<https://devfeed.tech/tags/ethereum.md>), [features](<https://devfeed.tech/tags/features.md>), [metropolis](<https://devfeed.tech/tags/metropolis.md>), [new-features](<https://devfeed.tech/tags/new-features.md>), [python](<https://devfeed.tech/tags/python.md>), [race-condition](<https://devfeed.tech/tags/race-condition.md>), [research-development](<https://devfeed.tech/tags/research-development.md>), [sharding](<https://devfeed.tech/tags/sharding.md>), [unit-test](<https://devfeed.tech/tags/unit-test.md>), [warp](<https://devfeed.tech/tags/warp.md>)

## AI overview

An Ethereum development roundup reports progress on the Metropolis and Byzantium fork, including testnet success, a projected mainnet block, new opcodes and cryptographic precompiles. It also covers Casper, sharding, client updates, synchronization, refactoring, bug fixes, and testing improvements.

## Source excerpt

Metropolis is finally (almost) here! The fork for Byzantium, the first and larger part of Metropolis, succeeded on the testnet over two weeks ago, and the likely date for the fork on the mainnet has been set to block 4.37 million, which is expected to be on Oct 17. New features...