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Binance also accepts debit and credit cards for purchasing dozens of cryptocurrencies for a fee. So in the end, you have two transactions that are negotiated with just one request and youtu.be response, one where the initiator is paying the fee, one where the non-initiator is paying the fee, and each of them chose the fee they are ready to pay. I will pay that fee. And the other party can also say, "I want a transaction too, here is the fee I’m ready to pay. Bastien Teinturier: Yeah, even though this creates also potential issues, because the commitment transaction right now, the fees are paid by the channel initiator. Bastien Teinturier: No, I don’t think so. Bastien Teinturier: Because there’s only one other party can actually change the feerate of a commitment transaction and it’s the channel initiator. Why is the fee for the commitment transaction paid by the opener of the channel? I understand why that would be the case for the initial open commitment, because when the opener opens a channel and the - well, I guess the other party does accept it anyway. So, if I’m the initiator and I want to close the channel, I’m going to say, "I’m closing that channel with that fee that is taken from my output.

Mark Erhardt: I really like that the person that wants to close the channel now has to pay for it, because it always baffled me that the person that started the channel also had to pay the closing fee. Mark Erhardt: Okay, I have one more question. And then there’s also a question about when do we jump? Maybe you want to talk about that briefly, and then we can kind of jump into some of these items? Mike Schmidt: Yeah, I think it’s probably good to jump into the second news item, then we can continue some of this discussion. Crypto is highly speculative and subject to volatility on the slightest bit of news. Binance might not offer the largest selection of cryptocurrencies, but it offers much more than the general financial apps such as Robinhood and Webull that have been encroaching into the crypto space. Without a central authority such as a bank to stoke the economy or offer credit, the economy could move into a deflationary spiral. So, since we all want to move to taproot, and this was one of the blocking points for taproot, that we didn’t have a good way of closing taproot channels and exchanging the nonce securely beforehand, I think everyone will just implement that version.

But if you play that game, the channel initiator will just blacklist you and you have to come up with a new node ID if you want to have channels with them, because force closing on someone is just, yeah, not a gentleman’s agreement. So, this is basically a channel that cannot be used any more, there’s nothing urgent to do on it apart from closing, so having even a few more round trips is just not at all an issue. That made no sense, and this makes a lot more sense to me. And already, with only one side of a channel being able to send that message, it creates a lot of issues, because updating the fee of a commitment transaction while you have a lot of HTLCs in flight can actually make you deep into your reserve. So, when you have a channel non-initiator, maybe you have more of an incentive to force close than to mutual close because this way it’s going to be the channel initiator that will pay the fees. So, if you are not the channel initiator and you are paying for part of the fee and only the initiator is able to choose that feerate, that would be an issue.

And so that will be part of the kind of economics that will determine, you know, who chooses to hold Bitcoin versus who chooses to convert it back to regular currency. If you let a third party hold them for you, they may get hacked. So now, it’s going to be a very simple version of RBF, where the incentive should be properly aligned because only one party is paying the fees and they are the one proposing that RBF. So, since our goal is rather to go in the direction of removing update fee entirely and using zero-fee commitment transactions, we’re just not going to bother changing how the fee is paid before we get to that point. The goal is to just get to a point where the commitment transaction doesn’t pay any fee so that everything is simpler. So, we would have to introduce the ability for both sides to send the update fee message to change the fees of a commitment transaction. Notable improvements include a more featureful and visually appealing wallet setup wizard, the ability to import wallets created using Specter, and more efficient QR codes for bech32 addresses.