Key Highlights:
- Cardano reached a symbolic community milestone with Epoch 666 as mainnet transactions surpassed the 127 million mark.
- The DijkstraNet testnet successfully hard forked to protocol version 12 using Node 11.2, unlocking testing for the Dijkstra feature set.
- Cardano sidechain Midnight advanced to Ledger 9, implementing native support for Ethereum-compatible cryptographic standards Keccak-256 and ECDSA.
Cardano Surpasses 127 Million Transactions Amid Epoch 666 Milestone
The Cardano blockchain has achieved significant network activity milestones as it quietly navigated Epoch 666. Operating on a scheduled cadence, Cardano structures its network consensus and operational timeline into epochs lasting five days, each composed of 432,000 one-second slots. While Epoch 666 carries strictly symbolic significance rather than technical weight—introducing no fundamental hard forks or underlying protocol changes—it served as a focal talking point across the Cardano community.
Alongside this sequential milestone, the layer-1 network crossed an essential adoption threshold. On-chain metrics from blockchain analytics platform Cexplorer reveal that Cardano has officially processed over 127,000,000 transactions on its mainnet, logging an exact count of 127,203,164 transactions. The sustained transaction count underscores continuous settlement and decentralized application usage across the broader ecosystem.
DijkstraNet Hard Forks to Protocol Version 12
Beyond transactional metrics, Cardano ecosystem engineers have advanced several core infrastructure upgrades. In technical developments, DijkstraNet—the dedicated testnet for Cardano’s upcoming Dijkstra hard fork—has officially hard forked to protocol version 12. Following this upgrade, DijkstraNet is now accessible for ecosystem participants to test and integrate against the full suite of Dijkstra features, with the sole exception of Linear Leios.
The successful transition of DijkstraNet into the Dijkstra era was executed using Cardano Node 11.2, which saw a pre-release deployment on October 28. Concurrently, technical support for tracking on-chain data improved with the release of DB Sync version 13.8.0.0, which has been deployed across all network environments.
Midnight Upgrades to Ledger 9, Adding Keccak-256 and ECDSA Cryptography
Simultaneously, major enhancements have arrived for Midnight, Cardano’s partner blockchain focused on data protection. Midnight has finalized a transition from Ledger 8 to Ledger 9, delivering a broader set of developer capabilities alongside general network enhancements aimed at security, system compatibility, and performance.
A central pillar of the Ledger 9 release is the native incorporation of established cryptographic standards, specifically Keccak-256 and the Elliptic Curve Digital Signature Algorithm (ECDSA). Keccak-256 represents the cryptographic hashing algorithm utilized by the Ethereum network to transform arbitrary data into fixed-length cryptographic fingerprints. Meanwhile, ECDSA serves as the prominent digital signature standard utilized by both Bitcoin and Ethereum to verify address ownership. By integrating these systems, Ledger 9 expands institutional custody and multi-asset wallet compatibility while enabling direct contract-to-contract interactions within the Midnight environment.
Why This Matters
The progression across Cardano’s core nodes and sidechain ecosystems reflects a strategic dual focus on scaling and cross-chain compatibility. The evolution of DijkstraNet provides developers with an active sandbox to prepare smart contracts and decentralized applications for protocol version 12 prior to any future mainnet implementation. Concurrently, Midnight’s integration of ECDSA and Keccak-256 removes long-standing cryptographic barriers between Cardano’s privacy-focused framework and the broader Web3 ecosystem, streamlining integrations for wallet providers, institutional custodians, and Ethereum-native decentralized protocols.
Frequently Asked Questions
What is an epoch on the Cardano blockchain?
An epoch is a defined operational timeframe in the Cardano consensus design. Each epoch lasts five days and contains 432,000 one-second slots, serving as the window in which stake pool distribution, block production, and network parameters are periodically updated.
What new features does the Ledger 9 upgrade bring to Midnight?
Ledger 9 provides Midnight developers with native support for Keccak-256 and ECDSA cryptographic algorithms, improved wallet and custody solution compatibility, direct inter-contract communication capabilities, as well as general performance and security enhancements.
Which feature is currently excluded from DijkstraNet version 12 testing?
While DijkstraNet is available for testing against the complete Dijkstra feature set under protocol version 12, Linear Leios is the only major feature currently excluded from this release phase.
