Editor's Note: This article comes fromHoneycomb Finance News (ID: fengchao-caijing)Honeycomb Finance News (ID: fengchao-caijing)

, Author: JX kin, reproduced by Odaily with authorization.

According to the news on March 26, Optimism, the most high-profile expansion project of Ethereum, stated that the main network "roughly estimates" that it will not be publicly available until July. Optimism originally planned to announce the mainnet at the end of March. It is one of the Ethereum Layer 2 solutions.

The development team gave the reason for delaying the launch of the mainnet, "We only considered our own needs, but did not consider the schedule and requirements of our partners." In the eyes of the community, rushing into Layer 2 is dangerous, which may lead to popular Decentralized applications are forked and released by adversaries to deceive users.

The postponement of Optimism also means that Ethereum's "speed up" plan has to be delayed again.

In order to solve the problems of network congestion and high transaction fee rates, Ethereum has been upgrading to 2.0, and the process of this upgrade is very long. The ever-growing DApps and users on the network have been troubled by the problems of low transaction efficiency and high cost for a long time, and the calls for expansion have increased greatly.

It is difficult and high-risk to expand the current Ethereum Layer 1 network, and a Layer 2 transition plan was proposed. Subsequently, state channels, side chains, Plasma, and Rollup became the four major Layer 2 solutions. Among them, Rollup technology is the most respected and has become the hope to solve the current congestion situation of Ethereum. Optimistic is an expansion project using Rollup technology.

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Introduction

Introduction

At the Ethereum Foundation Research Forum in July 2019, John Adler, a member of the development team ConsenSys, proposed the Optimistic-Rollup solution. They believe that this solution can increase Tps to 3000, and DeFi applications based on this protocol layer can be very fast. Well compatible with Ethereum Layer1 network.

In mid-January this year, the Optimism team started the soft launch (trial run) of the mainnet of the expansion solution.

On March 26, Optimism stated that the mainnet is roughly estimated to be delayed until July.

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Operating principle

Since the calculation process is the most time-consuming and costly part of a transaction, processing calculations at Layer 2 (L2) can greatly reduce the demand for the current Ethereum mainnet Layer 1 (L1), thereby increasing the throughput of the Ethereum network And lower transaction fees.

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features

features

John Adler explained the characteristics of the Optimistic Rollup (ORU) scheme in detail in an article:

Trust-free - trust is minimized, you can withdraw your funds from ORU at any time, and the vast majority of block producers on the network are honest.

License-free - anyone can become a block producer on ORU, because all block data on ORU is published on Ethereum and can be obtained from Ethereum.

Custody-free - Since ORU is both trust-free and permission-free, you can withdraw your funds at any time, and no one can stop you.

Expressiveness - whether it is a Bitcoin-like UTXO payment, or a mature compatible EVM implementation, ORU can handle it.

Open participation - ORU supports smart contracts and is open to everyone like Uniswap.

High capital efficiency - ORU does not require users to lock up funds in advance.

Anti-chain congestion - ORU does not calculate time-consuming and resource-consuming on-chain transactions, it calculates data for smart contracts.

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Potential problems

Potential problems

Although the problem of transaction rate and handling fee can be solved by Layer 2, since the consensus mechanism of the Optimistic-Rollup network contains the premise of "believing that the vast majority of block verifiers are credible", it is not ruled out that some trickster. If there is a dispute, a referee on L1 re-runs the calculation on the Ethereum network and checks the results.

The impact of this is that ORUs are not as trustworthy as zero-knowledge proofs.

For example, the MakerDAO smart contract team plans to launch the Optimism-Dai Bridge solution to resolve the problem that Optimistic-Rollup requires a one-week withdrawal time. Specifically, the solution allows L1 DAI to be locked to mint L2 oDAI, and oDAI to be instantly burnt to access L1DAI.

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Deployed application

Synthetix, a DeFi synthetic asset platform, is already testing Optimism. According to the developers, after using Optimism, the gas fee can be reduced by up to 143 times, and the transaction confirmation time can be as low as 200 milliseconds. The application plans to fully transfer its staking and mining functions to L2, while the application's transaction functions are intended to remain on both L1 and L2.

Uniswap, the flagship DEX application on Ethereum, plans to deploy the V3 version on the Optimistic layer. On October 19 last year, Uniswap ran a gamified proof of concept (Unipig) using Optimistic Rollups. Tests show that the gas fee can be reduced by up to 100 times, and the transaction confirmation time is as low as 169 milliseconds.

SushiSwap's CTO Joseph Delong previously tweeted that he plans to complete the deployment after the Optimism mainnet goes live.

MakerDAO will launch the "official" version of DAI on Optimism. The smart contract team plans to launch a solution, Optimism DaiBridge, to solve the problem of long withdrawal cycles on the L2 network.