Welcome to OpenBuild Dev Digest #108!
This issue covers cutting-edge cryptography, agent economy infrastructure and two leading on-chain AI ecosystems. Vitalik publishes an in-depth breakdown of indistinguishability obfuscation (iO), a powerful cryptographic primitive that hides program logic yet suffers from prohibitive runtime overhead for real-world deployment. Beyond payment settlement, x402 evolves into a native discovery layer for AI agents, enabling one-step service matching and machine-to-machine transactions. Base and Bittensor stand out as the two most active ecosystems for on-chain AI projects, with distinct growth models built around crowdsourced incentives and flexible structural frameworks respectively.
📅 June 28 - July 15 📍 Online 💸 8,000USD Apply
Build on Tether. Play like a knockout tournament.
The Tether Developers Cup is a global developer competition that runs like a football knockout tournament. Teams of 1 to 4 build a real project on the Tether open-source stack, declare a nation to represent, and compete through five rounds until one team wins.
Each round is timed , Every cut...the field gets smaller. The last team standing wins the overall prize, and track winners are named along the way.
📅 May 20 - July 14 📍Online 💸 42,000USD Apply
The next era of productivity is agentic—and it lives in Slack.
We’re calling on all builders—from seasoned Slack veterans to “vibe coders” picking up the Slack CLI for the first time—to join the Slack Agent Builder Challenge. This is your opportunity to redefine the workplace by building intelligent agents that automate workflows, surface real-time insights, and connect systems in ways we haven’t imagined yet.
Whether you’re building a specialized agent for your organization, a tool for social good, or the next viral Slack Marketplace app, we want to see your creativity in action. Leverage the Slack Agent Builder, MCP integrations, and the Real-Time Search (RTS) API to show the world why Slack is the ultimate surface for AI.
📅 June 15 - July 12 📍 Online 💸 7,000USD Apply
Build institutional-grade financial applications on Canton Network over 4 weeks. Tracks cover tokenized assets, settlement infrastructure, private DeFi, treasury operations, and agentic commerce. Top 3 teams across all tracks share the prize pool.
✍️ Obfuscation: building the final boss of cryptography (Part I) 👉Read(EN)
Indistinguishability obfuscation (iO) is a highly advanced cryptographic concept that can hide a program’s internal workings while still allowing it to run normally
While mathematically secure methods can now be built by stacking complex lattice-based techniques like homomorphic encryption, their current runtimes are completely impractical and require much more optimization
✍️ x402 Is More Than Agent Payments 👉Read(EN)
At its core x402 is becoming the discovery layer for the agent economy, the place where agents find the services they need and where providers get found and paid in the same call. The payment is the visible part, and the discovery is the nascent opportunity. For a provider, the value shows up as distribution, demand that arrives intent-attached and only when an agent actually calls. Whereas agents, cab discover and find the right service and pay for it in one step. Teams onboarding onto x402 should expect the first-order value to show up as distribution before it shows up as massive revenue.
✍️ AI on Bittensor vs AI on Base 👉Read(EN)
If we’re talking about the onchain ecosystems with highest amount of unique AI projects — it’s definitely these two ecosystems.
One is filled with 128 projects utilizing incentives + crowdsourced talents to scale AI infrastructure/product of their choosing.
The other has flexibility in how things are structured & distribution that can help attract partners, investors, and users they may need.
💸 Lido
Maximum Bounty $2,000,000 👉 Apply
Lido is a liquid staking solution for Ethereum, backed by industry-leading staking providers and community stakers. It allows users to stake their ETH without locking up assets or maintaining infrastructure, while still participating in on-chain activities.
💸 Folks Finance
Maximum Bounty $200,000 👉 Apply
Folks Finance is a community-driven DeFi protocol offering a variety of tools for digital asset management
💸 TermMax
Maximum Bounty $50,000 👉 Apply
TermMax is a DeFi protocol that reinvents borrowing, lending, and leveraging by combining fixed-rate mechanisms with customizable Automated Market Maker (AMM) pricing curves.
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