• Sign In With Agent introduced.

• Coinbase introduces Agentic Wallets.

• UniswapX to support BlackRock BUIDL.

• Ondo brings tokenized stocks to DeFi.

[

Listen to this episode from Ethereum News on Spotify. Builders Garden introduces Sign In With Agent. Coinbase introduces Agentic Wallets. UniswapX will support BlackRock's BUIDL fund. And Ondo brings tokenized stocks to DeFi. Read more: https://ethdaily.io/881 Sponsor: Arkiv is an Ethereum-aligned data layer for Web3.

https://spotify.com

](https://open.spotify.com/episode/43awH1qh19kerma0v9Hm3i)

EarnUSD is a stablecoin vault by Lido for earning transparent, onchain USD-denominated rewards. Get started today at stake.lido.fi/earn

Builders Garden, a crypto product studio, introduced Sign In With Agent (SIWA), a new open standard for trustless identity and authentication for AI agents. Similar to "Sign In With Ethereum," but designed for agents, it aims to solve two major security risks: leaked API keys and insecure wallets embedded in agent runtimes. Built on ERC-8004 and ERC-8128, SIWA enables agents to create a wallet, register an onchain ERC-8004 identity, and authenticate requests using cryptographic signatures instead of shared secrets. Private keys never reside inside the agent. All signing operations are handled through a separate keyring proxy, allowing the agent to request signatures without ever accessing the private key.

Coinbase Developer Platform introduced Agentic Wallets, the first wallet infrastructure purpose-built for autonomous AI agents. The wallets allow agents to independently send, receive, trade, and manage funds onchain without constant human intervention. Agentic Wallets include programmable spending controls, non-custodial identity, and gasless transactions on Base. They're powered by the x402 protocol and built on Coinbase's CDP Wallet infrastructure, with private keys secured in Trusted Execution Environments (TEEs). Developers can launch Agentic Wallets in minutes via a simple CLI, equipping agents with financial capabilities and financial autonomy.

Uniswap Labs partnered with tokenization platform Securitize to enable trading of BlackRock's USD Institutional Digital Liquidity Fund (BUIDL) on UniswapX. Through the integration, eligible whitelisted investors can swap BUIDL shares for USDC using UniswapX's RFQ (request-for-quote) system. UniswapX is a permissionless, auction-based liquidity aggregation protocol that sources both onchain and offchain liquidity to deliver competitive pricing. The integration expands liquidity options for BUIDL holders. BUIDL remains restricted to qualified institutional investors and high-net-worth qualified purchasers.

Ondo Finance partnered with Chainlink to provide oracle pricing for its tokenized U.S. stocks and ETFs on Ethereum via Ondo Global Markets. The integration enables tokenized equities to be used as collateral in DeFi lending markets, with Euler now supporting borrowing of stablecoins against the real world assets. The collaboration unlocks liquidity and yield for equities.

• Teku v26.2.0 release

• Charon v1.8.2 release

• TheDAO funds SEAL 911

• Xatu execution trace data

• Requirements for zkVM

• ZK-based API usage protocol

• Houdini launches randomizer

• Octant announces Octant Labs

• Privacy ecosystem map

• OP yield opportunities

• Aave expands to Mantle

• UniFI AVS awarded EIGEN grant

• Status FIRM stablecoin

• Aztec proceeds with TGE

• Base releases leaderboards

Disclaimer: Content is for informational purposes only, not endorsement or investment advice. The accuracy of information is not guaranteed.

• Robinhood Chain live on testnet.

• Quick Slots proposed for Hegota.

• Stripe supports x402 Payments.

• Fusaka audit contest results.

[

Listen to this episode from Ethereum News on Spotify. Robinhood Chain goes live on testnet. Carl Beek proposes Quick Slots for Hegota. Stripe supports x402 Payments on Base. And Sherlock shares the Fusaka audit contest results. Read more: https://ethdaily.io/880 Sponsor: Arkiv is an Ethereum-aligned data layer for Web3.

https://spotify.com

](https://open.spotify.com/episode/0RW6DwEmf6ISZ1rt9HsxAt)

EarnUSD is a stablecoin vault by Lido for earning transparent, onchain USD-denominated rewards. Get started today at stake.lido.fi/earn

Robinhood launched the public testnet for Robinhood Chain, it's Ethereum Layer 2 network built on Arbitrum. Developers can now build and test apps ahead of a planned mainnet launch later this year. The testnet is EVM-compatible, supporting existing Ethereum dev tools, with early infrastructure from Alchemy and Chainlink. Robinhood Chain aims to accelerate onchain financial services and tokenized real-world assets (RWAs). The company plans to eventually migrate its 2,000+ tokenized U.S. stocks and equities to the network and is committing $1 million to support developers through the 2026 Arbitrum Open House program.

Ethereum developer Carl Beek proposed including "quick slots" as a non-headliner EIP in the Hegota upgrade. Rather than committing to a fixed slot duration, the proposal introduces variable slot timing infrastructure, enabling slot times shorter than today's 12 seconds. Beek notes that a full move to 6-second slots is unlikely as a headliner alongside FOCIL, so the goal is to reduce slot times as much as possible, given available resources. The proposal seeks to progressively shorten slot times where headroom exists. Shorter slots would significantly improve Ethereum's user experience by enabling faster transaction confirmations, deposits, and payments. They also improve protocol efficiency by tightening DEX pricing, reducing MEV surplus, accelerating sequencing for based rollups, and reducing reliance on preconfirmations.

Stripe, a leading online payments processor, launched support for x402 payments using USDC on Base, enabling developers to charge AI agents directly with just a few lines of code. Using Stripe's standard PaymentIntents API, businesses can bill agents for API usage, MCP calls, or HTTP requests, with agent-specific pricing. Stripe product lead Jeff Weinstein noted that agents require microtransactions, always-on global rails, low latency, HTTP-native flows, strong controls, and fast finality. Alongside the launch, Stripe released an open-source CLI called purl, as well as Node and Python examples to help developers test machine payments. The release is currently available in private preview.

Blockchain security firm Sherlock released the results of its $2 million audit contest for Ethereum's Fusaka upgrade, conducted in collaboration with the Ethereum Foundation. Over 500 security researchers participated, uncovering four high-severity issues alongside several medium and low findings, all of which were fixed before mainnet. No critical vulnerabilities were found, unlocking $500,000 of the prize pool. Activated on December 3, 2025, Fusaka introduced Peer Data Availability Sampling (PeerDAS) to improve scalability and reduce transaction costs. A $250,000 bug bounty remains active post-launch.

• ACDT #69 minutes

• Post-Fusaka shift to L1

• Solidity opens dev survey

• Aave V4 security audit

• 0xBow hiring backend engineer

• Optimism live on 8004scan

• Guide to securing ZKPs

• Uniswap wins Bancor lawsuit

• Arbitrum dynamic pricing

• Circles x Gnosis starter kit

• Zero Alt-L1 announced

Disclaimer: Content is for informational purposes only, not endorsement or investment advice. The accuracy of information is not guaranteed.

• MegaETH live on public mainnet.

• Base App removes Talk feed.

• Slice introduces ERC-8128.

• ZKsync ZK staking pilot.

[

Listen to this episode from Ethereum News on Spotify. MegaETH goes live on public mainnet. The Base App removes the Farcaster social feed. Slice introduces ERC-8128. And ZKsync launches a ZK staking pilot. Read more: https://ethdaily.io/879 Sponsor: Arkiv is an Ethereum-aligned data layer for Web3.

https://spotify.com

](https://open.spotify.com/episode/1jvE06lDHCxL52bT1WSmNW)

EarnUSD is a stablecoin vault by Lido for earning transparent, onchain USD-denominated rewards. Get started today at stake.lido.fi/earn

MegaETH launched its real-time, performance-focused blockchain built on Ethereum to public mainnet. Alongside the launch, MegaETH introduced Rabbithole, an all-in-one frontend for discovering and interacting with the MegaETH ecosystem. Rabbithole enables natural-language app discovery and asset management. MegaETH also integrated support for ERC-8004, enabling onchain registries for agentic service discovery and reputation. Powered by MegaEVM, its high-performance, EVM-compatible virtual machine, MegaETH delivers higher gas limits, real-time execution, sub-cent transaction fees, and native $USDM payments.

The Base App, the non-custodial wallet formerly known as Coinbase Wallet, announced it is removing its Farcaster-powered "Talk" feed as it refocuses the app on trading. Coinbase is also sunsetting its Base Creator Rewards program. The Base App will now feature a trading-first feed focused exclusively on tradable assets. Base contributor Jesse Pollak stated that the app was never intended to be a full-fledged Farcaster client, and that removing social content allows the team to fully commit to building the best onchain trading experience. Farcaster users are urged to return to the Farcaster client.

Slice, an Ethereum commerce infrastructure provider, introduced ERC-8128, a standard for signing HTTP requests with Ethereum accounts instead of traditional credentials like API keys or session tokens. It aims to enable stateless, secure web authentication without relying on shared secrets. With ERC-8128, each request is cryptographically signed by the sender's Ethereum account, binding identity and intent directly to the request content. The approach strengthens security and protects against credential leaks and replay attacks. Services can leverage ERC-8128 to verify identity, confirm eligibility, and accept payments.

ZKsync launched its staking pilot program that rewards ZK token holders who stake their tokens and delegate to an active governance delegate. Built on Tally's delegate-to-stake infrastructure, the program aims to boost delegated ZK and active voting power. Season 1 runs for three months, with rewards targeting ~3% APR and adjustable up to a 10% maximum based on participation levels. A broader rollout will follow in Season 2.

• EF sponsors SEAL 911

• Optimism Upgrade 18

• Optional Execution Proofs

• Alchemix v3 documentation

• Validator consolidation progress

• BitMine buys 40,613 ETH

• Derive launches Builder Codes

• Owocki Bot exposes private key

• DPRK uses legit LinkedIn profiles

• MrBeat acquires Step

Disclaimer: Content is for informational purposes only, not endorsement or investment advice. The accuracy of information is not guaranteed.