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Proof of Payment design choices

In this post I’ll try to explain some design choices for BIP 120, Proof of Payment, and also comment on some critique against it. Basically a Proof of Payment looks exactly like a Bitcoin transaction: Note how Pop(T) in indistiguashable from a Bitcoin...

Sorting out Replace By Fee

Recent months, I’ve been pretty confused over all the different flavors of Replace By Fee (RBF). There’s RBF, FSS-RBF, RBF scorched earth, opt-in RBF and possibly heaps of other variants. This blog post aims at bringing clarity (to me) what all this means...

Impressions from Scaling Bitcoin workshop

Last week I attended Scaling Bitcoin in Hong Kong. I will try to summarize my main takeaways from that. Segregated witness The talk that caused most buzz was Pieter Wuille on segregated witness. This is a really interesting idea that’s actually implemented (sort...

Proof of Payment in Mycelium

Mycelium has implemented Proof of Payment (BIP120 and BIP121), and I’m really glad they did. It’s one of the most popular wallets out there. Plus, I implemented most of it. I’d like to show you how smooth the user experience can be when PoP is used...

Proof of Payment explained

I have written two BIPs (Bitcoin Improvement Proposal), BIP120 and BIP121, that specify how a wallet can prove that it has made a payment. This blog post takes a stab at explaining this process. If you want to play with this, install Mycelium on android and go to my...