Especially for optimistic rollups....When funds are withdrawn from an optimistic rollup back to Ethereum using a roll-up bridge, funds are...Optimistic rollups exist so that the L1, Ethereum, does not have to do the compute-heavy job of executing...

ZK (Validity) Rollups: Entering the General Purpose Era [Excerpt from a Delphi Insights report] Rollups...Rollups (ORU) and ZK Rollups (ZKR)....Fraud proofs, as used in Optimistic rollups, are only needed when disputing the transactions posted to...

In this report, we look at how the Layer 2 ecosystem is shaping up and dive into the varying rollup solutions...order to unlock the next phase of growth, the scaling torch has been passed over to Layer 2s, led by rollup...

...functions as a p2p liquidity bridge across chains In contrast to this, Optimism and Arbitrum, two Optimistic...Rollup implementations, are designed to be general-purpose....This is because, as part of the Rollup security model, the Rollup Sequencer (the party that replaces...

This simplified graphic depicts the parts which apply to both Ethereum optimistic rollups (ORUs) and...Settlement from Rollups – Rollups post proofs to the L1....It’s quite optimistic that every rollup will run near the lower bound of DA efficiency....rollup.

Synthetix and Optimism While the rollups we know and love today were still being built, Synthetix committed...to building on Optimism – one of the earliest projects to commit to a specific rollup.

Based rollups Quoting Justin Drake: “A rollup is said to be based, or L1-sequenced, when its sequencing...With based rollups, every rollup and their competitors can opt-in to use the already bootstrapped and...If current rollups were to switch to become a based rollup, they’d be giving up this value to the L1...

...and there are two main categories: Optimistic Rollups (ORU) and ZK Rollups (ZKR)....Fraud proofs, as used in Optimistic rollups, are only needed when disputing the transactions posted to...This is where the term Optimistic comes in – all state changes are assumed valid until they are proven...

In the case of Optimistic Rollups, fraud proofs require access to the transaction data along with the...The funds would be secured by the underlying Bitcoin miners until the optimistic withdrawal is settled...The final proof combines all of them and is optimistically verified by BitVM.

⚡ The Complete Guide to Rollups Current rollups settle to Ethereum where they have a smart contract...As rollups decentralize and smart contracts become battle-tested, these rollups could scale Ethereum...You can also build rollups on top of these rollups, so-called “L3s.”...It could serve as a settlement layer for other rollups.

Chart of The Day: Arbitrum vs Optimism Arbitrum and Optimism are the two leading Optimistic rollups...For more on L2s, Delphi members can read our Delphi Pro report on ZK Rollups here!...Chart of The Day: Arbitrum vs Optimism Arbitrum and Optimism are the two leading Optimistic rollups for...

The optimistic bridge evokes the optimistic roll-ups in my mind, because roll-ups at the end are just...optimistic roll-ups....roll-ups with optimistic interop....In both of these systems, optimistic roll-ups and optimistic interoperability protocols, you’re attempting...to optimistic roll-ups?

This is a Snippet from “Solana the Modular” MagicBlock, instead of building a general purpose rollup,...is extending execution using ephemeral rollups....Using PDAs, the execution for accounts can be delegated to an Ephemeral rollup which could have its own...Validators are hyper-specialised and run the Ephemeral rollups. They are co-located near users.

We can view finality in ZK-Rollups as a spectrum.

UMA provides an optimistic oracle that Prediction markets rely on for resolution....(Optimistic Oracle) to process data and resolve the market....multi-sig of 7-9 people aligned with the success of a prediction market is far more secure then an optimistic...

This offers orders of magnitude cheaper alternative way for rollups to secure their data....Namely, an Ethereum-settled rollup, instead of paying expensive Etheruem gas for DA, can now use Celestia...Instead of rollups relying purely on Ethereum, they will now be relying on attestations of Celestia validators...

...its advantages, such as amortizing the cost of engineering and providing a competitive experience for rollup...The landscape of optimistic rollups versus ZK rollups is constantly evolving, with ZK technology progressing...Shared Sequencers 25:11 Value Accrual in a World with Shared Sequencers 32:41 The Evolving Landscape of Optimistic...

Can a rollup be Ethereum aligned if it uses Solana as a shared sequencer?...Once executed, confirmations are sent to rollup indexers and the rollup state is advanced....It creates two orders: a buy order on Rollup 1, where the price is lower, and a sell order on Rollup...

...co-founder and CEO of Chainway Labs, the company behind Citrea – Bitcoin’s first zero-knowledge (ZK) rollup...Virtual Machine) primitive to create a trust-minimized bridge between Bitcoin’s base layer and the Citrea rollup...

These two leading optimistic rollups have been able to effectively incentivize usage via airdrops....These are classified as optimistic rollups (ORUs) because the transactions are assumed to be valid....We cover rollups in more detail in our guide to rollups, published exclusively for Delphi Pro members...