Welcome to OpenBuild Dev Digest #111!
This digest covers emerging physical security risks, new RWA Layer2 and AI-driven on-chain security changes. CertiK’s H1 report reveals a 33.3% year-on-year jump in violent wrench attacks targeting crypto holders, with $124.1 million total exposed assets, France as the core hotspot and home invasion incidents skyrocketing. Robinhood Chain, an Arbitrum-based Ethereum L2 focused on tokenized stocks and RWAs, went live with surging DEX volume, though real-world asset applications remain immature. The long-standing security assumption that exploits take human experts weeks to craft is invalidated: AI agents can mass-scan contracts and generate functional exploits at unprecedented speed, creating severe defense asymmetry for all Web3 builders.
📅 July 2 - August 9 📍 Singapore Apply
AI CAN DO IT | Tencent Cloud Hackathon-“Age Well” Social Good Challenge Singapore is now officially launched!
Co-organized by Tencent Cloud, Tencent Institute of Games, Tencent WeTech Academy, and Tencent Interactive Entertainment Group (IEG) Social Value Exploration Center and is organized by the SMU AI Club.
This is an AI-driven creation challenge open to developers from universities and colleges worldwide. Whether you are a programmer who thrives on elegant architectur
📅 July 6 - August 1 📍Online 💸 1,500USD Apply
Build confidential DeFi applications by integrating Nox — iExec’s confidential computing layer — into existing open-source protocols like Aave, Uniswap, Safe, or MetaMask. Add privacy flows without modifying the underlying protocols. Judged on integration cleanliness, privacy guarantees, and production readiness.
📅 July 6 - July 31 📍 Online 💸 17,000USD Apply
Build a Mini App that runs inside Nimiq Pay with built-in wallet and payment access. Build games, tools, marketplaces, social apps, or anything useful — your app just needs to connect to at least one supported wallet interaction. Four weeks, three winners per cycle. Scored by the Nimiq Community Council across design, functionality, originality, and marketing.
✍️ CertiK Intel3D H1 2026 Wrench Attacks 👉Read(EN)
CertiK Intel3D’s H1 2026 Wrench Attacks report shows that physical violence against crypto holders has become a serious and growing threat. CertiK recorded 52 verified incidents worldwide in the first half of 2026, up 33.3% year over year, with reported losses and ransom demands reaching about $124.1 million.
The threat is highly concentrated in Europe, especially France, which accounted for 33 of the 52 incidents. The biggest tactical shift was the rise of crypto-related home invasions, which jumped from 1 reported case in H1 2025 to 20 in H1 2026. Kidnappings also remained high, while torture and murder continued to appear in confirmed cases.
✍️ Ten Questions and Answers: A Comprehensive Guide to Robinhood Chain 👉Read(EN)
On July 1, 2026, Robinhood officially launched the public mainnet of Robinhood Chain. It is an Ethereum Layer 2 designed for financial services and real-world assets (RWAs). Built using Arbitrum technology, the network supports Stock Tokens, decentralized finance (DeFi), perpetual futures, and applications powered by AI agents.
Onchain activity grew rapidly following the mainnet launch. According to a Bernstein report published on July 13, Robinhood Chain recorded approximately $3.1 billion in decentralized exchange (DEX) trading volume over the previous seven days, briefly ranking among the five largest blockchain networks by DEX volume. The network held approximately $300 million in stablecoins and $13 million in tokenized stocks. However, memecoin trading accounted for a large share of the early activity, while the RWA applications for which the network was designed remained at an early stage.
The following ten questions explain Robinhood Chain’s positioning, technology, Stock Tokens, user access, and current ecosystem.
✍️ The Exploit Asymmetry: AI Attacks Faster Than You Can Patch 👉Read(EN)
For years, the comforting story in smart-contract security was that exploits were hard. Finding a real, profitable bug took a skilled human, weeks of staring at code, and a lot of luck. Audits, bug bounties, and formal verification were built around that assumption: that the attacker’s job was slow.
That assumption is breaking. Research now shows that AI agents can autonomously read a contract, find a vulnerability, and produce a working, validated exploit, fast and at scale. One study concluded that more than half of the blockchain exploits carried out in 2025 could have been executed autonomously by current AI agents. The attacker’s job stopped being slow.
This lands in the middle of a brutal stretch for DeFi, with one recent quarter setting a record for the sheer number of exploits and roughly three quarters of a billion dollars stolen. So the question for anyone shipping on-chain code is not whether this matters. It is what the asymmetry actually is, how much of it is real versus hype, and what defense looks like when the other side has the same AI you do, plus better incentives.
💸 Aevo
Maximum Bounty $300,000 👉 Apply
Aevo is a new protocol that creates crypto structured products for DeFi. Structured products are packaged financial instruments that use a combination of derivatives to achieve some specific risk-return objective, such as betting on volatility, enhancing yields or principal protection.
💸 Origin Protocol
Maximum Bounty $1,000,000 👉 Apply
Origin Protocol is a suite of complimentary DeFi products designed to increase economic opportunity for all. These permissionless and composable smart contracts provide superior user experiences across DeFi in a groundbreaking multichain yield ecosystem.
💸 Hydration
Maximum Bounty $3,333,333 👉 Apply
Olympus is building the value layer of global finance. A programmatic treasury-backed framework for monetary policy, credit, and liquidity
Selected open courses from technical skills to practical tasks, accessible to everyone with no cost!
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