Episode notes
Francis is the Founder of Bull Bitcoin, one of the best bitcoin brokerage services. They recently launched a self custody mobile wallet on ios and android: Bull Wallet. This rip was earlier today, in person, in Lugano. We are both here for the PlanB Forum.
Francis on Nostr: https://primal.net/francis
Francis on X: https://x.com/francispouliot_
Bull Wallet: https://wallet.bullbitcoin.com
PlanB Forum: https://planb.lugano.ch/planb-forum/
EPISODE: 181
BLOCK: 920238
PRICE: 929 sats per dollar
(00:00:00) Catching up from Lugano: old rips, 2019 memories, and lore
(00:01:07) Introducing Bull Wallet: goals, BDK under the hood, and UX vision
(00:02:21) Lightning lessons: LDK attempts, liquidity pain, and Phoenix tradeoffs
(00:04:38) Fee shocks and “just-in-time” channels: why Liquid entered the plan
(00:06:24) Liquid + Boltz atomic swaps: architecture, Rootstock notes, and standards push
(00:07:37) Designing for privacy and power users: Sparrow on mobile, Payjoin journey
(00:12:21) Data minimization in practice: no push, no cloud leaks, strict dependencies
(00:13:56) Shipping realities: iOS approval grind and cross‑platform necessity
(00:15:11) Secure versus Instant: Liquid framing, hype cycles, and collaborative custody
(00:19:13) The UX–compromise matrix: placing Liquid among trust models
(00:21:24) Auto‑swap safety rails: keeping Liquid balances modest by default
(00:24:26) Confidential transactions and buying flows: privacy wins via Liquid
(00:27:24) Swap providers and resilience: Boltz today, multi‑provider tomorrow
(00:31:05) Builders who ship: moving fast, potentially Ark or Spark in the future
(00:32:11) Why Ark: unilateral exits, pre‑confirmed states, and costs
(00:50:00) Ark tradeoffs without soft forks: watchtowers, refresh, and liveness
(00:57:15) Ark vs Liquid in Bull Wallet: timelines, reckless testing, and user defaults
(01:04:12) Payjoin, heuristics, and passive consolidation
(01:11:01) Consolidation strategies: Liquid swaps, CT, and fee‑aware UTXO management
(01:15:48) Lightning address UX with Liquid: directories, costs, and tiny payments
(01:17:10) Nostr as a wallet backend: zaps, contact book, and secure comms
(01:18:01) Multisig in practice: BitPay’s UX, Miniscript future, and mobile approvals
(01:20:19) Operator messaging and alerts: following npubs inside the app
(01:20:49) Core v30, OP_RETURN, and policy vs consensus
(01:31:09) Funding open source: OpenSats, private companies, and shipping culture
(01:35:15) Why open source keeps us sane: creativity, legacy, and closing notes
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