Tezos activates Kathmandu protocol upgrade on its mainnet

Quick Take

  • Contributors to the Tezos blockchain activated the Kathmandu protocol upgrade.
  • This was the 11th network upgrade for Tezos since its inception.

Layer 1 blockchain Tezos activated an upgrade called Kathmandu, adding new scaling capabilities.

The Kathmandu upgrade went live on the Tezos proof-of-stake mainnet at block 2,736,129 on Friday at 4:30 p.m. ET, according to the Tezos team.

This was the 11th upgrade for Tezos since its inception in 2018, and one that promises potential scalability improvements.


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According to the upgrade’s formal proposal, it has added the potential to support off-chain computation via Layer 2 solutions like optimistic roll-ups, and streamlined the block validation process for better transactional throughput. Furthermore, the contributors said that Kathmandu introduced a permanent testnet for experimenting with new features, and improved randomness in how the mainnet picks delegates for enhanced security, among other protocol improvements. 

Kathmandu was proposed in July by Tezos contributors and development firms Nomadic Labs, Marigold, TriliTech, Oxhead Alpha, Tarides, DaiLambda and Functori & Tweag. It was later approved by the community through an on-chain governance process.

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About Author

Vishal Chawla is The Block’s crypto ecosystems editor and has spent over six years covering tech protocols, cybersecurity, artificial intelligence and cloud computing. Vishal likes to delve deep into blockchain intricacies to ensure readers are well-informed about the continuously evolving crypto landscape. He is also a staunch advocate for rigorous security practices in the space. Before joining The Block, Vishal held positions at IDG ComputerWorld, CIO, and Crypto Briefing. He can be reached on Twitter at @vishal4c and via email at [email protected]