Kubi Mensah(@kubimensah):I had a great chat with @tw_tter to walk through what actually happens between a user clicking 'swap' and the transaction landing in a block. Public and private mempools, what a builder is doing once everything arrives, why this layer concentrates the way it does, what ePBS and FOCIL each change.

2026.05.01 16:57

I had a great chat with @tw_tter to walk through what actually happens between a user clicking 'swap' and the transaction landing in a block. Public and private mempools, what a builder is doing once everything arrives, why this layer concentrates the way it does, what ePBS and FOCIL each change.

Epicenter Podcast@epicenterbtc

2026.05.01 16:48

New Episode: Inside The Anatomy of Ethereum @kubimensah, CEO of @gattacahq (Titan Builder), joins @tw_tter to pull back the curtain on Ethereum’s most secretive and competitive sector: Block Building. Kubi explains how Titan captures nearly 50% of Ethereum’s block production and why the industry naturally gravitates toward a builder oligopoly. The conversation dives into the "fair exchange" problem, the dark forest of private mempools, and why the upcoming FOCIL upgrade is crucial for preserving Ethereum’s censorship resistance by breaking the builder monopoly on transaction inclusion. 00:00 Gattaca’s Origin in Proprietary Trading 05:15 Reality of Block Building 10:30 Public vs. Private Mempools 16:00 Why 50%+ of Transactions are Private 24:45 Anatomy of an Ethereum Block 33:20 Why Block Building Naturally Centralizes 42:15 Trust & Private Order Flow 51:40 Builder-Solver Convergence 58:30 ePBS, FOCIL, and the Future of Ethereum Episode Links👇