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News
Parse crypto amounts like hostile input, declare rounding first
16+ hour, 48+ min ago (712+ words) I have been building payment and crypto systems in production since 2018: custodial wallets for BTC and ETH, a fiat-to-crypto onramp, exchange order books, stablecoin rails in daily use. The amounts that gave me the most trouble were not the large…...
5 Errors I Hit Building DeFi Bots (And How to Fix Them)
22+ hour, 14+ min ago (580+ words) Building production bots on free APIs sounds cool in theory. In practice, you hit walls immediately. Here are the 5 real errors I encountered while building two Ethereum monitoring bots, and exactly how I fixed them. The Problem: I started monitoring…...
Endogenous Hazard: The Model Starts Listening to the Market
1+ day, 4+ hour ago (414+ words) Three articles ago I wrote that "endogeneity" was the deepest of the three critiques a derivatives-savvy reader made of my crash simulator. Two articles ago I built the margin spiral. Last article I built the dealer short-gamma spiral and ended…...
Why 90% of Candlestick Patterns Fail: Building an Institutional AI Confluence Scanner in Python
1+ day, 8+ hour ago (23+ words) If you have ever attempted to build an algorithmic trading bot in Python, you have almost certainly... Tagged with python, trading, ai, opensource....
150ms Taker Delay and Volume-Tier Limits
2+ day, 20+ hour ago (351+ words) Part 2 pinned the settlement target: 60s Chainlink TWAP. Part 3 is the matching layer. A correct P(up) still dies if the venue changed how taker orders are allowed to race. Add the older delay-lock behavior: once a taker order enters the…...
Building an investing knowledge graph, part 6: if you're merging data from more than one source, you'll hit this
3+ day, 3+ hour ago (444+ words) Since part 5 went up, I've had two conversations worth writing about. One was with someone building a financial news aggregation system who wanted to know if the ER setup here would work for their case. The other was with someone…...
Hedera's EVM speaks tinybar, its RPC speaks weibar, and both mistakes return SUCCESS
3+ day, 5+ hour ago (709+ words) I lost most of a day to a bug that never once failed. I was building a contract that pays for its own future: an access subscription that re-arms itself on-chain through the Hedera Schedule Service, so an agent pays…...
Building a Polymarket TWAP State Machine for Trading Bots
3+ day, 12+ hour ago (709+ words) Learn why a Polymarket TWAP state machine should model resolution, oracle observations, market time, and execution as separate states. A short-duration trading bot can receive every price update correctly and still make a structurally wrong decision. The reason is simple:…...
Borsa Verisiyle Çalışırken Sürekli Dönüp Dolaşıp Kullandığım 6 Python Kütüphanesi
3+ day, 18+ hour ago (59+ words) Arac secimi zeka degil tekrar meselesi, ayni ise ayni araci kullanmak hiz kazandiriyor. Tagged with finance, python, data....
The Option Pricing Model, Backsolve and PWERM (Part 2)
3+ day, 23+ hour ago (1166+ words) Part one of this series ended on a claim: for a venture-backed company that recently raised, the enterprise value is not really the hard part. Someone paid a price in an arm's-length transaction and that price is your anchor. The…...