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arbitrum

Arbitrum is an Ethereum Layer 2 scaling solution created by the Offchain Labs team based on Optimistic Rollup technology. Arbitrum utilizes the communication capabilities between L1 and L2, allowing any form of Ethereum asset to be transferred between Layer 1 and Layer 2 without trust. Although Arbitrum transactions are still settled on Ethereum, Arbitrum only submits the raw transaction data to Ethereum, with execution and contract storage occurring off-chain. Therefore, the gas fees required by Arbitrum are significantly lower compared to the mainnet, and contracts are fully compatible with no gas limits.
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first_img Four Pillars Researcher: Robinhood Chain has not disappeared

On October 20, researcher 100y from the cryptocurrency research institution Four Pillars published a response to external doubts: Robinhood Chain has not disappeared, its ecosystem remains resilient, and it is preparing for the next round of growth. The chain is set to launch on July 1, 2026, positioning itself as an on-chain financial network centered around tokenized stocks. The article states that Robinhood's cryptocurrency business revenue share dropped from 27.2% in the first quarter of 2025 to 12.6% in the first quarter of 2026.According to data from The Rollup, the chain's daily network fees on September 4 were approximately $8.27 million, compared to Robinhood's total cryptocurrency business revenue of about $100 million in the second quarter of 2026. After the market weakened and meme popularity cooled, fees fell by over 99% from their peak, with daily fees in mid-October around $30,000 to $40,000, less than 1% of the peak. 100y attributed the spike in fees to congestion in September: the chain uses the Arbitrum tech stack, and the base fee index rises when usage exceeds target processing capacity.As of the publication date, the on-chain Total Value Locked (TVL) is approximately $1.1 billion. The Steakhouse Financial curation and the Steakhouse USDG Vault supplying USDG to Morpho account for about half of this, with a scale of approximately $540 million and still rising, and around 75,000 deposit wallets. Stocks and ETFs account for more than half of the issued Real World Asset (RWA) tokens, with an associated outstanding value of about $150 million. The spot trading volumes on September 4 and October 7 were approximately $3.27 billion and $3.24 billion, respectively, and daily trading volumes have remained at least around $600 million to $700 million since then. Robinhood has strategically invested in the perpetual platform Lighter and Arcus. 100y stated that the next round of growth depends on the scale of the treasury and stock tokens, meme trading, perpetual activities after the points period, as well as more builders and new on-chain financial primitives.

first_img Robinhood Chain evaluates the paid trading ranking system, with technical support from Arbitrum

According to CoinDesk, the Layer 2 blockchain Robinhood Chain, designed for tokenizing real-world financial assets, is evaluating a transaction sorting system that allows users to pay fees for prioritizing specific transactions. This technology is developed by Arbitrum, the infrastructure provider for Robinhood Chain. Insiders say that Arbitrum's previously launched paid transaction sorting technology, Time Boost, could provide users with a 200-millisecond prioritization advantage, but it was replaced on September 24 by the new Priority Gas Auctions model, which allows traders to pay higher fees to prioritize individual transactions. This new version is what Robinhood Chain is currently evaluating.Currently, Robinhood Chain employs a first-come, first-served transaction sorting strategy and has not yet utilized Arbitrum's original Time Boost application. Since launching its Ethereum-compatible network in July, Robinhood Chain has rapidly gained popularity and has entered the top ten blockchains ranked by total locked value. Robinhood's traditional brokerage business has long profited through "payment for order flow," where market makers pay brokers for the routing rights of customer orders.The mechanism of on-chain paid transaction prioritization operates differently; it provides advantages to traders by accelerating transaction processing speeds, helping professional institutions compete for fleeting trading opportunities.

first_img Arbitrum Security Committee urgently suspended the activation of the new contract Stylus and added BoLD protection

On October 2, at 11:30 AM Eastern Time, the Arbitrum Security Committee executed an emergency upgrade on Arbitrum One and Nova, suspending the activation of all new Stylus contracts on both chains, while adding a protective mechanism against BoLD single-step proofs in the dispute system of Arbitrum One. The Arbitrum Foundation stated that this action is part of ongoing proactive security measures aimed at protecting the security and integrity of the network.Stylus allows developers to write smart contracts using languages such as Rust and C++, while maintaining compatibility with the Ethereum Virtual Machine, with its programs compiled into WebAssembly format. This suspension primarily targets manually written WASM programs that do not use the standard Stylus compiler toolchain and have not yet been patched by the current version of ArbOS. The Security Committee increased the gas required for activation to the theoretical maximum by calling ArbOwner.setWasmActivationGas(2^64 - 1), making new activations economically unfeasible. Activated Stylus contracts are unaffected and can continue to execute and renew, and the deployment and execution of Solidity contracts are also unrestricted.The newly added BoLD protection allows anyone to pause the settlement from Arbitrum One to Ethereum when two conflicting and accepted answers appear in the same dispute step, which may delay unconfirmed withdrawals to allow the Security Committee to deploy fixes. Officials pointed out that the currently discovered Stylus-related vulnerabilities mainly affect the activity of the chain, such as denial-of-service attacks, and do not jeopardize user funds.
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