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Rollups
Scroll Confirms Mainnet Live, as Co-Founder Predicts Speed Gains Over Ethereum
Blockchain data showed that Scroll’s smart contract was deployed on Oct. 8, but the team held off making its official announcement until this week.

Manta's Layer-2 Blockchain Already Plans to Ditch OP Stack for Polygon
The network, which just went live a couple weeks ago as a so-called optimistic rollup – the core underpinning of OP Stack – will now become a “ZK-rollup,” which is what Polygon’s software kit provides.

Scroll zkEVM Launches, Blockchain Data Shows, Competing With Polygon, Matter Labs
The new Ethereum layer-2 network's debut adds to the competition among rival providers of so-called "zkEVMs," including Polygon and Matter Labs.

At Last, Blockchain Developer OP Labs Delivers ‘Fault Proofs’ Missing From Core Design
The developer’s OP Stack software, the blueprint for Coinbase’s new Base blockchain, had been criticized for the lack of a crucial security feature – likened to driving a fast car without airbags.

Buenos Aires Releases Blockchain Digital Identity Solution Powered by zkSync's ZK Proofs
Citizens of Buenos Aires can access the identity solution, the QuarkID wallet, where they can store their birth and marriage certificates, according to the city government.

Polygon Emerges as Suitor for Celo’s New Layer-2 Blockchain, Competing With OP Stack
Celo, which is ditching its standalone blockchain in favor of a new "layer-2" network atop Ethereum, had originally signaled plans to rely on Optimism's OP Stack, a similar customizable kit to Polygon's but using Optimism’s “optimistic” technology.

‘Sequencers’ Are Blockchain’s Air Traffic Control. Here’s Why They’re Misunderstood
Leading rollup operators are criticized for using "centralized sequencers" to package transactions and pass them down to Ethereum, but the real risks may lie elsewhere.

Ethereum Handled Friend.tech Frenzy Without 'Gas Fee' Spike. Why That’s a Big Deal
Friend.tech, Crypto's latest fad, didn't drive up congestion and fees on Ethereum the way frenzies have in the past – possibly a sign that the blockchain's efforts to scale by fostering supplemental "layer-2" networks, like Coinbase's new Base, are bearing fruit.

Coinbase’s Chosen Blockchain Brand Sees Zero Threat from Zero Knowledge
Many Ethereum aficionados have predicted that the most promising layer-2 blockchains would be built not using the OP Stack’s “optimistic rollup” technology – favored by the U.S. crypto exchange Coinbase – but with a different setup known as “ZK rollups,” reliant on "zero-knowledge" cryptography.

Zero-Knowledge Rollup ZKM Sets Out to Make Ethereum 'Universal Settlement Layer'
With funding from the foundation that oversees development of the Metis layer-2 Ethereum protocol, ZKM is developing a hybrid rollup that combines an Optmistic rollup and Zero-Knowledge rollup into one.
