• March 5th: Robinhood announced that it will soon list Arbitrum (ARB)!

• March 4th: DeriW, an Arbitrum-based Layer 3, announced the launch of its testnet. DeriW's security is guaranteed by Layer 2, which in turn is backed by Ethereum.

Arbitrum is a Layer 2 scaling solution for Ethereum, created by the Offchain Labs team using Optimistic Rollup technology. It began testing in May 2021 and officially launched in late August, quickly becoming the chain with the highest TVL (Total Value Locked) among all Layer 2 solutions. Arbitrum's suite of scaling solutions offers significantly faster speeds at a lower cost, with the same level of security as Ethereum. It provides seven times the throughput and lower fees compared to Ethereum, without compromising on security.

Arbitrum utilizes the Optimistic Rollup approach in Layer 2 technology, which is highly compatible with the EVM (Ethereum Virtual Machine) and offers low transaction fees. Unlike Optimism, which requires only one interaction between sequencers and validators to determine results, Arbitrum believes that a single interaction could lead to overly complex proofs that exceed gas limits. Therefore, it employs a different challenge mechanism and implementation.

To understand Arbitrum further, it's essential to know why Layer 2 solutions emerged:

1. Optimistic Rollup Technology: Arbitrum uses Optimistic Rollup to enhance interaction efficiency while ensuring security.

2. Low Transaction Fees: Leveraging Layer 2 advantages, Arbitrum's transaction fees are significantly lower than those on the Ethereum mainnet.

3. High Throughput: Arbitrum can handle more transactions than the Ethereum mainnet, improving overall efficiency.

4. Compatibility with Ethereum: Arbitrum is highly compatible with Ethereum, allowing developers to seamlessly migrate their applications.

The development team, Offchain Labs, was co-founded by former White House technology official and Princeton University computer science professor Ed Felten, along with Princeton PhD students Steven Goldfeder and Harry Kalodner:

• Steven Goldfeder: Co-founder and CEO of Offchain Labs. He previously worked at Google after obtaining his Ph.D. from Princeton University.

• Harry Kalodner: Co-founder and CTO of Arbitrum / Offchain Labs. He is a computer scientist with a Ph.D. in Computer Science from Princeton University.

• Ed Felten: Chief Scientist at Offchain Labs and a professor of Computer Science and Public Affairs at Princeton University. He has been educating students in computer science and public affairs for nearly 30 years.

The Ethereum scaling solution Arbitrum's developer, Offchain Labs, has completed multiple fundraising rounds:

• April 2019: Arbitrum raised $3.7 million in a seed round led by Pantera Capital, with participation from Compound VC, Raphael Ouzan, and Jake Seid.

• September 2019: Received support from Coinbase Ventures (details undisclosed).

• April 2021: Offchain Labs completed a $20 million Series A round (details of timing and investors not specified).

• September 14, 2024: Arbitrum completed a $120 million Series B round led by Lightspeed Venture, with participation from Pantera Capital, Polychain, Ribbit Capital, Redpoint Ventures, Alameda Research, Mark Cuban, and others.

Historically, Arbitrum's TVL has surpassed that of Polygon and continues to widen the gap, consolidating its position. Currently, DeFi and cross-chain applications are the main focus on Arbitrum. However, as developers and users grow, more new applications are expected to be deployed on the Arbitrum One and Arbitrum Nova networks. With the maturation of ZK Rollup technology, Arbitrum, which uses Optimistic Rollup, needs to stay vigilant about maintaining its technological edge and continuing to attract developers and users.

• March 5th: Robinhood announced that it will soon list Arbitrum (ARB)!

• March 4th: DeriW, an Arbitrum-based Layer 3, announced the launch of its testnet. DeriW's security is guaranteed by Layer 2, which in turn is backed by Ethereum.

Arbitrum is a Layer 2 scaling solution for Ethereum, created by the Offchain Labs team using Optimistic Rollup technology. It began testing in May 2021 and officially launched in late August, quickly becoming the chain with the highest TVL (Total Value Locked) among all Layer 2 solutions. Arbitrum's suite of scaling solutions offers significantly faster speeds at a lower cost, with the same level of security as Ethereum. It provides seven times the throughput and lower fees compared to Ethereum, without compromising on security.

Arbitrum utilizes the Optimistic Rollup approach in Layer 2 technology, which is highly compatible with the EVM (Ethereum Virtual Machine) and offers low transaction fees. Unlike Optimism, which requires only one interaction between sequencers and validators to determine results, Arbitrum believes that a single interaction could lead to overly complex proofs that exceed gas limits. Therefore, it employs a different challenge mechanism and implementation.

To understand Arbitrum further, it's essential to know why Layer 2 solutions emerged:

1. Optimistic Rollup Technology: Arbitrum uses Optimistic Rollup to enhance interaction efficiency while ensuring security.

2. Low Transaction Fees: Leveraging Layer 2 advantages, Arbitrum's transaction fees are significantly lower than those on the Ethereum mainnet.

3. High Throughput: Arbitrum can handle more transactions than the Ethereum mainnet, improving overall efficiency.

4. Compatibility with Ethereum: Arbitrum is highly compatible with Ethereum, allowing developers to seamlessly migrate their applications.

The development team, Offchain Labs, was co-founded by former White House technology official and Princeton University computer science professor Ed Felten, along with Princeton PhD students Steven Goldfeder and Harry Kalodner:

• Steven Goldfeder: Co-founder and CEO of Offchain Labs. He previously worked at Google after obtaining his Ph.D. from Princeton University.

• Harry Kalodner: Co-founder and CTO of Arbitrum / Offchain Labs. He is a computer scientist with a Ph.D. in Computer Science from Princeton University.

• Ed Felten: Chief Scientist at Offchain Labs and a professor of Computer Science and Public Affairs at Princeton University. He has been educating students in computer science and public affairs for nearly 30 years.

The Ethereum scaling solution Arbitrum's developer, Offchain Labs, has completed multiple fundraising rounds:

• April 2019: Arbitrum raised $3.7 million in a seed round led by Pantera Capital, with participation from Compound VC, Raphael Ouzan, and Jake Seid.

• September 2019: Received support from Coinbase Ventures (details undisclosed).

• April 2021: Offchain Labs completed a $20 million Series A round (details of timing and investors not specified).

• September 14, 2024: Arbitrum completed a $120 million Series B round led by Lightspeed Venture, with participation from Pantera Capital, Polychain, Ribbit Capital, Redpoint Ventures, Alameda Research, Mark Cuban, and others.

Historically, Arbitrum's TVL has surpassed that of Polygon and continues to widen the gap, consolidating its position. Currently, DeFi and cross-chain applications are the main focus on Arbitrum. However, as developers and users grow, more new applications are expected to be deployed on the Arbitrum One and Arbitrum Nova networks. With the maturation of ZK Rollup technology, Arbitrum, which uses Optimistic Rollup, needs to stay vigilant about maintaining its technological edge and continuing to attract developers and users.