Nostr notes by FRANCIS

Guess who's back

2025-11-13T19:58:49Z

Guess who's back

Nostr event nevent1qqst7mj9dqqnssxj6nsatazmh20s6ekxvuld7m4jz3fvr7mtc7znqaqzypdgukqlz6sp9cjd9fjqz54d2cs93jcxtcwl9r5s0sdl4qkp2ryt584z2af

2025-01-21T14:23:07Z

y'a tu des quebecois icitte?

Bull Bitcoin becomes the first mobile Bitcoin wallet that allows ...

2024-12-28T16:33:10Z

Bull Bitcoin becomes the first mobile Bitcoin wallet that allows users to send and receive asynchronous Payjoin transactions without needing to run their own server, using BIP77!

I am very excited about this new and bleeding-edge feature, because it has been a long-standing ambition of Bull Bitcoin to become the first Bitcoin exchange to process Bitcoin withdrawals via Payjoin (Pay-to-Endpoint) transactions.

However, it was hard to justify Bull Bitcoin investing time into building this feature since there were no commercially available end-user Bitcoin wallets that were able to receive Payjoin payments.

Indeed, in order to receive Payjoin payments (BIP78), a Bitcoin wallet needed to be connected to a full node server and be online at the moment the payment is made. This means in practice that only merchants, professional service providers and advanced full node users had the capacity to receive Payjoin payments. This is, we believe, one of the major reasons why Payjoin had failed to gain significant traction among Bitcoin users.

For this reason, the Payjoin V2 protocol (BIP77) was conceived and developed by Dan Gould, as part of the Payjoin Dev Kit project, to outsource the receiver's requirement to run his own server to an untrusted third-party server called the Payjoin Directory. In order to prevent the server from spying on users, the information is encrypted and relayed to the Payjoin Directory via an Oblivious HTTP server.

Bull Bitcoin’s Payjoin ambitions had been put on hold since 2020, until there was more adoption of Payjoin receiving capabilities among end-user Bitcoin wallets…

But it turns out that in the meanwhile, Bull Bitcoin developed its own mobile Bitcoin wallet. And it also turns out that the open-source Bitcoin development firm Let There Be Lightning, which we had collaborated with in the past, had itself collaborated with Dan to build a software library for Payjoin that was compatible with and relatively straightforward to integrate into our own wallet software. All that was missing was to put the pieces together into a finished product.

Thanks to the collaborative open source effort of the Payjoin Dev Kit team, Let There Be Lightning team and the Bull Bitcoin team, the Bull Bitcoin wallet has now become the first commercially available end-user mobile wallet on the Google Play store to implement the BIP 77 Payjoin V2 protocol.

Moreover, the Bull Bitcoin wallet has also implemented asynchronous Payjoin payments, which means that a Payjoin transaction can be “paused” until the receiver or the sender come back online. This way, the receiver's mobile phone can be “turned off” when the sender makes the payment. As soon as the recipient’s phone is turned back on, the Payjoin session will resume and the recipient will receive the payment. This is a major breakthrough in the mobile Payjoin user experience.

We would like to thank the Human Rights Foundation for allocating a generous bounty for the development of a Serverless Payjoin protocol and its implementation in a mobile Bitcoin wallet, as well as OpenSats and Spiral for supporting the work of Payjoin Dev Kit, which made this all possible.

Why does this matter?

Payjoin, also known as Pay-to-endpoint, is a protocol which allows the Bitcoin wallet of a payments receiver and the Bitcoin wallet a payments sender to communicate with each other for the purpose of collaborating on creating a Bitcoin transaction.

I first heard about Payjoin (then called Pay-to-endpoint) in 2018 and it completely blew my mind. What I liked most about it was that it was not a protocol change to Bitcoin, but rather it was an application-layer protocol that allows wallets to communicate in order to create smarter and more efficient Bitcoin transactions.

Whereas in a normal Bitcoin payment the transaction is created by the sender, and all the inputs of that transaction belong to the sender, in a Payjoin payment both the sender and the receiver contribute coins as inputs.

In the Bitcoin whitepaper, Satoshi wrote:

"some linking is still unavoidable with multi-input transactions, which necessarily reveal that their inputs were owned by the same owner"

With Payjoin, this assumption is no longer true. With Payjoin, we have fixed one of Bitcoin’s most fundamental privacy problems... without changing the Bitcoin protocol!

In a Payjoin transaction, the output amounts visible on the blockchain does not necessarily reflect the value of the payment that was actually exchanged. In other words, you can’t easily tell how much money one wallet sent to the other. This is great for users that are concerned a malicious third party may be attempting to obtain sensitive information about their finances without their consent. This does not however pose an accounting problem for the Bitcoin wallets involved in that transaction: since both wallets are aware of which coins they used as inputs and outputs, they are independently able to calculate the "actual" value of the payment that was sent even if the payment on the blockchain appears to be a of a different amount.

Payjoin breaks the common input ownership heuristic, an assumption used by hackers and fraudsters to track ownership of addresses on the blockchain. The neat thing about this property of Payjoin is that it benefits everyone on the network, not just the Payjoin users themselves.

It allows the receiver of a payment to opportunistically consolidate his utxos when he is receiving funds, in a way which does not necessarily appear to be a consolidation transaction on the blockchain. Depending on the configuration of a payment transaction, it can also make a regular payment look like a consolidation.

In addition to these benefits, the introduction of collaborative peer-to-peer transaction protocols opens up exciting opportunities for the creation of Lightning Network channels, as well as efficiencies for transaction batching.

How to use Payjoin in the Bull Bitcoin wallet:

It’s so seamless, you may not even realize you are using it!

To receive via Payjoin, simply navigate to the “Receive tab” using the network “Bitcoin” and you will see a Payjoin invoice. When you want to get paid, send this invoice to the payer, or show them the QR code. If the sender’s wallet is compatible with Payjoin, it will be up to the sender to decide whether or not they want to use Payjoin.

To send via Payjoin, simply paste the receiver's Payjoin invoice, or scan the associated QR code, in the Bull Bitcoin wallet. If you decide that you don’t want to pay with Payjoin, simply turn off the Payjoin toggle.

Original post: https://www.bullbitcoin.com/blog/bull-bitcoin-wallet-payjoin

Download the wallet: https://play.google.com/store/apps/details?id=com.bullbitcoin.mobile&hl=en-IN

The Rare Sat Lie Let's start with some facts. You cannot ...

2024-04-17T22:36:23Z

*The Rare Sat Lie*

Let's start with some facts.

You cannot own a satoshi (sat). You can only own a utxo, who's value is measured in sats. Just like you cannot own a "kilogram" but you can own something which weights a kilogram.

The idea that a sat can be rare is a lie, since sats don't exist.

A utxo also cannot be sold, because as soon as it is spent, a completely new utxo is created, and the creation of this new utxo makes the previous utxo (which you wanted to sell) spent. To act of spending "an unspent transaction output" (UTXO) transforms it into something fundamentally different, a "spent transaction output" (STXO) and creates a new UTXO.

The idea that a utxo can be sold is a lie, since even utxos cannot be sold.

The idea that a rare sat from a "special" utxo can be bought is thus a double lie.

*Rare Sat Sophistry*

The conmen, the useful idiots and the otherwise honest but contrarian pundits will rationalize the spreading of the "Rare Sat Lie" with sophistry and appeals to libertarian morality such as "it's a free market, people can believe whatever they want and waste their money however they wish".

Of course, this line of reasoning is meant to create strawmen arguments so that every person that is righteously indignated at the spreading of these lies can be painted as being opposed to the concept of individual freedon itself, which immediately places the TruthSeeker's outrage outside of the Overton Window (and subject to ridicule).

Let us dispell the strawman argument.

The "market" (a small niche of degenerate gamblers) can want whatever it wants, yes. But it till cannot change the reality that individual satoshis (sats) do not exist as "things" or virtual objects. This reality is not subjective.

The sophists will also rationalize that "it cannot be stopped" and thus all you can do is "cry harder" (ironic eh?) and that any and all attempts to combat the lies are futile (at best) or stupid.

It may be true all the truthseeker can do is cry and shout, but it is also true that to combat the spreading of such lies is a virtuous and noble pursuit. And it is also true that the direct result of the shouting can be to save a victim from otherwise being conned. Which is, we would all agree I hope, a moral good, if not a moral imperative.

People are free to spread the lie that such things ("rare" "sats") are real, and fraudulently sell utxos of low value presented as "rare" "sats" for utxos of higher value, but to do so by exploiting the ignorance of people and confusion around the complex technology of Bitcoin is evil according to nearly almost moral code that ancient and modern civilizations have produced.

I am the last person that would deny someone the right to be evil. But I believe if you see a fraud and you don't call out the fraud then you too are a fraud.

So, the strawman is really just straw.

*The Rare Sat Con*

Beyond it being morally bad to spread lies generally, the spreading of the lie also occurs within the context of textbook confidence trick.

Confidence tricks involve :

- the mark: the victims whose money is to be acquired fraudulently
- the roper: reels in the mark via exposure and marketing, peaking the curiosity of the mark (i.e. a conference or media organization)
- the inside man: provides a venue for the con to take place, or supplies goods and services used in the context of the scam (a mining pool or a marketplace)
- the conman: gains the confidence of the mark extracts the money (the seller of a rare sat)
- the convincer: an acolyte of the conman which gives a taste of the profits to the mark either by investing in the mark, or showing off his profits to the mark (a fellow rare sat trader)

The conman and the convincer can interchange roles. For example, conmen and convincers can publicly con each other repeatedly and alternatively, with gains and losses which compensate, with the tacit understanding that the goal is really to gain the confidence of a mark from which both convincer and conman can extract money from.

Everyone except benefits in this zero sum game, except obviously the mark.

In the end, the mark was never forced to give up his money. He willingly parted ways with his funds, deceived by the confidence trick.

Selling "rare sats" for utxos of higher sat value is without doubt a confidence trick.

I will let it up to your imagination who you think plays which role in the rare sat con.

I blindly followed everyone in the replies and who like this note ...

2024-04-04T22:08:43Z

I blindly followed everyone in the replies and who like this note

quoting
note1a00…j0ha

shill me your favorite people I should follow and I will follow them. can be yourself, unless you are lame and cringe.

shill me your favorite people I should follow and I will follow ...

2024-04-04T18:29:40Z

shill me your favorite people I should follow and I will follow them. can be yourself, unless you are lame and cringe.

Red snapper filet baked in butter with orange, passion fruit and ...

2023-02-22T01:08:04Z

Red snapper filet baked in butter with orange, passion fruit and lemon.

15 baked oysters with garlic, butter, mozarella/parmesan mix and bread crumbs.

Total prep time ~10 minutes. Cook time ~15 minutes. Total cost ~80k sats give or take.

Restaurants are scams. Cook at home revolution is happening.

Pura Vida

Guess how many sats I paid for 20 large-size organic local ...

2023-02-18T21:31:46Z

Guess how many sats I paid for 20 large-size organic local bananas at Bitcoin Jungle farmer's market

Nostr notes by FRANCIS

Guess who's back

Nostr event nevent1qqst7mj9dqqnssxj6nsatazmh20s6ekxvuld7m4jz3fvr7mtc7znqaqzypdgukqlz6sp9cjd9fjqz54d2cs93jcxtcwl9r5s0sdl4qkp2ryt584z2af

Bull Bitcoin becomes the first mobile Bitcoin wallet that allows ...

*The Rare Sat Lie* Let's start with some facts. You cannot ...

I blindly followed everyone in the replies and who like this note ...

shill me your favorite people I should follow and I will follow ...

Red snapper filet baked in butter with orange, passion fruit and ...

Guess how many sats I paid for 20 large-size organic local ...

The Rare Sat Lie Let's start with some facts. You cannot ...