Polygon zkEVM
2 storiesPolygon zkEVM was an Ethereum validity rollup designed for EVM-compatible smart contracts, zero-knowledge proofs, sequencer-based batching, and settlement through Ethereum. Polygon Labs completed the network's sunset on July 3, 2026; the sequencer no longer produces blocks, and ordinary Agglayer Bridge withdrawals are unavailable. This historical tag should cover the former Mainnet Beta, proof and bridge architecture, ecosystem migration, shutdown decisions, and the dedicated claims process for eligible externally owned account balances. Polygon PoS, other Polygon scaling products, and assets locked in third-party contracts require separate treatment because their recovery paths and operating status differ.
Ethereum Researchers Push to Close zkEVM Security Gap by December 2026
Ethereum researchers are working to resolve a critical cryptographic proof gap in zkEVM security, aiming to meet the 128-bit system-level requirement before the December 2026 deadline. The outcome could shape the future of Ethereum scaling and security.
Crypto Exchanges Shut Down as Institutions Embrace Blockchain
Major crypto exchanges BitMEX and BitMart are winding down operations amid a deepening 2026 bear market, while traditional financial institutions accelerate adoption of blockchain infrastructure and tokenization