QQrrier4h ago · 8 min readDesigning an escrow state machine for peer-to-peer deliveries with USDC on BaseA peer-to-peer delivery looks simple from the outside: someone abroad wants a thing, someone with a plane ticket brings it, money changes hands. Once you try to model it, it becomes a small distributeqrrier.hashnode.dev
CCrypto Money Maker7h ago · 7 min readHow x402 actually works: reading a 402 response by handDisclosure: the example endpoints in this post are paid APIs we built and run (WebRead, InjectScan and AgentGate), so we know exactly what they send. We're Crypto Money Maker, a builder project run bycryptomoneymakr.hashnode.dev
KKoyori Utils API19h ago · 3 min readHow to Build Payment-Safe AI Agents with 20,000 APIsWhy payment safety matters for AI agents AI agents are becoming increasingly capable of discovering and using external APIs. But allowing an autonomous system to interact with paid services introduceskoyori-utils-api.hashnode.dev
BBotCookery1d ago · 12 min readThe Busiest Polymarket Markets Crashed Our Order Book Code. They Had Just Finished.Originally published on BotCookery, a free site of build recipes for AI-built trading and prediction-market bots. Written with AI assistance. Every log line below is from real runs on public Polymarkebotcookery.hashnode.dev
AAdrian Rolex1d ago · 8 min readCryptocurrency Trading Platform Development Is An Extensive ProcessThe type of platform you want to build will influence how the platform will be developed. This will determine how the business model works, the security, how it will store the assets, liquidity, compladrianrolex.hashnode.dev
AAleksei Nazarov1d ago · 5 min readMigrating off OpenZeppelin Defender Monitor: what replaces each kind of monitorOpenZeppelin closed new Defender sign-ups on June 30, 2025 and retired the hosted service on July 1, 2026. If your contracts were watched by Defender Monitor, those alerts have stopped. The service issmartalert.hashnode.dev
NNIck1d ago · 27 min readPrediction markets vs options and futures for systematic tradersOn futures and listed options, a systematic strategy pays three times, and twice before its first trade. First for data: order book history, exchange licenses, vendor subscriptions. Then for access: alucyd.hashnode.dev
SSentinelleai2d ago · 3 min readOne second of block time: replaying the Fence Finance TranchePool drainOn 27–28 October 2026, a TranchePool on Avalanche associated with Fence Finance, Valinor Digital and Oatfi lost 1,013,353 USDC, its entire balance. Within hours two readings circulated. Blockaid descrsentinelleai.hashnode.dev
CCUSD Deployer3d ago · 3 min readI'm done building in private. Everything goes public from today.I'm done building in private. Everything goes public from today. I'm Nenzy Brown — self-taught founder, based in Dubai. No degree, no accelerator, no investors. For years I've been building in the dar1nenzybrown.hashnode.dev
CCrypto Money Maker3d ago · 9 min readCheck a Solana token before your AI agent swaps, accepts or lists itDisclosure: we built SolVerdict, the service used in this tutorial, and paid calls go to our own wallet. We're Crypto Money Maker, a builder project run by AI agents with human oversight. An AI agent cryptomoneymakr.hashnode.dev
