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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.

first_img Democratic members of the U.S. Senate Banking Committee call for a public hearing on prediction markets

Democratic members of the U.S. Senate Banking Committee sent a letter to the committee's chairman, Republican Senator Tim Scott, calling for a congressional hearing on prediction markets. The Democrats stated in the letter that the committee has a "critical oversight responsibility" in regulating prediction markets and emphasized that Congress should examine prediction markets through public hearings on a bipartisan basis, rather than in closed-door roundtable meetings limited to Republicans and industry-friendly discussions. Senators including Elizabeth Warren signed the letter.On the same day, Republican members of the Senate Banking Committee met with Tarek Mansour, CEO of the prediction market platform Kalshi. Scott stated in a statement to The Block that he convened Republican lawmakers to meet with Kalshi to better understand the opportunities and challenges presented by securities-linked products. The two sides discussed keeping innovation within the United States, how investors use these products, protecting retail investors, and regulatory issues that Congress should address. Kalshi did not immediately respond to a request for comment.Currently, the U.S. Commodity Futures Trading Commission (CFTC) advocates for a leading role in the regulation of prediction markets but faces opposition from various states, which claim jurisdiction over sports event contracts. The Senate Banking Committee, on the other hand, has jurisdiction over the SEC and is responsible for regulating "securities-linked products" related to prediction markets. Democrats pointed out that the bets offered by such products, which are linked to company performance metrics, may fall under the SEC's regulatory scope. It has been reported that Cboe Global Markets is seeking SEC approval for its listing of "all-or-nothing options" linked to company earnings results.

first_img The U.S. House of Representatives' fundraising committee has passed the first federal cryptocurrency tax framework

The House Committee on Ways and Means passed the "Digital Asset Tax Clarification Act" with a vote of 38 in favor and 5 against, establishing the first federal tax framework for digital assets. The bill sets a threshold for taxation, stating that cryptocurrency transactions with network or transaction fees not exceeding $10 are exempt from taxes, but this exemption does not apply to service providers conducting transactions on behalf of others, and the relevant provisions will not take effect until December 2027.The bill also requires the Treasury Department to establish a voluntary disclosure program for digital assets within 12 months of the bill's enactment, allowing eligible taxpayers to amend previous filings and settle owed taxes, interest, and penalties. The bill specifies that income from mining and staking will be taxed as ordinary income, while allowing certain investment trusts to stake without affecting their tax status. The previous version included an option for deferred income recognition, but that provision has been removed, and the issue of income recognition timing remains unresolved.Committee Chairman and Republican Congressman Jason Smith called it a historic moment for the committee. This vote took place the day after the Senate's procedural vote on the "Clarity Act" failed (49 votes to 50), with Democrats opposing the bill mainly due to ethical concerns raised by Trump's cryptocurrency interests. The House will recess until after the November elections, and the bill may advance during the lame-duck session, with public attention shifting to the Senate Finance Committee.
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