tallinnupgrade

On January 24, 2026, at 16:06:56 UTC, Tezos successfully activated its 20th protocol upgrade, named Tallinn, at mainnet block #11,640,289. This upgrade follows the network’s established on-chain governance model, allowing protocol changes to be adopted without hard forks or chain splits. The proposal was developed collaboratively by Nomadic Labs, Trilitech, and Functori and approved through a vote by Tezos bakers.

Key Improvements

1. Reduced Block Time and Accelerated Finality

Layer 1 block time reduced from 8 seconds to 6 seconds
Transaction finality now achieved in approximately 12 seconds (2 blocks) instead of 16
Resulting in lower latency for applications and faster transaction confirmations
No additional hardware requirements for bakers

2. Enhanced Baker Attestations with BLS Signatures

Once 50% of bakers adopt tz4 addresses, all bakers will attest every block
Employs Boneh–Lynn–Shacham (BLS) aggregated signatures, consolidating multiple signatures into a single, efficient signature
Benefits include reduced data processing overhead, leaner consensus, and improved network security

3. Improved Storage Efficiency via Address Indexing

Introduces an Address Indexing Registry to compress on-chain storage of addresses
Replaces full addresses with short references, yielding up to 100× storage efficiency gains for certain Michelson-based applications
Particularly beneficial for NFT ledgers and large-scale smart contracts
Reduces disk space requirements for nodes

4. Layer 2 Impact and Tezos X Roadmap

Faster L1 blocks enhance the performance of Etherlink, Tezos’ EVM-compatible layer 2 network
Supports faster and more efficient settlement of layer 2 data on L1
Aligns with the Tezos X roadmap, which focuses on improved scalability, faster settlement, and lower operational costs for applications

Strategic Significance

The Tallinn upgrade demonstrates Tezos’ continued commitment to its self-amending, forkless protocol model, delivering meaningful improvements in performance, scalability, and governance efficiency. By combining faster block times, advanced signature aggregation, and optimized storage, Tallinn strengthens both base-layer infrastructure and layer 2 integration, reinforcing Tezos’ position as a high-performance, developer-friendly blockchain platform.
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