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So now we know the entire strategy of bitcoin functioning and the way Bitcoins can be used for making all sorts of actual transactions. Bitcoins are exchangeable for fiat currency through cryptocurrency exchanges and can be used to make purchases from merchants and retailers that settle for them. Greg Sanders: Yeah, if I can leap in. Mark Erhardt: So I’m questioning, one among the issues that seems to leap out after i hear you speaking about this is, what if one side retains making updates however not concluding it? And we’ve always gone again and forth between those, because we don’t know if we should do a easier model first and anticipate later to do a much more complicated model, or if we should just jump to the extra complex version right now. Because we’ve all the time been discussing the truth that asserting, having the channel announcement level to a specific onchain output, was fairly dangerous for privateness and that we could most likely do better. So, those are issues that we’ve always been simply hand-wavy about how we'd try this in the future. Read More: Amid value drops and elevated regulation, what’s the way forward for cryptocurrency?

But I don’t think we’ll permit you to have any form of multiplier, as a result of one in all the other ideas was that you might additionally just announce some UTXOs that you simply own, with the proof that you own them, with a complete worth of, for instance, 2 bitcoin, and then that may grant you the ability to announce up to X times that in channels with out having to point to any specific onchain output. I didn’t suppose it was too dangerous, however the one key difference right here is that for the payment channels with penalties as currently designed, it’s necessitating that you simply retailer these secret nonces without end till channel close. These charts are cardinal part of the whole affair as with them traders are ready to predict the movement close to accuracy. But, figuring out that the markets by no means shut is a useful safeguard to have. In case you have another Lightning-like channel specification that you simply coded up or a customized channel type, you can too include that on this channel announcement and it'll just work. That’s why we’re not doing that proper now, and that’s why most individuals will simply keep saying the output that actually corresponds to the channel in order that when it will get spent, individuals truly notice it and may take away it from that graph and know that they cannot route through that channel anymore.

I feel we’re going to follow a simple model, where you enable pointing to any sort of output to pay on your channel. PTLC fixes that by ensuring that instead of utilizing the preimage of a SHA256 hash and its hash, we’re going to make use of elliptic curve factors and their personal keys. This could seem pointless provided that BIP32 already supplies extended personal keys (xprvs) that can be shared between signing wallets. Maybe we will start with t-bast. Can the channel stay open when the UTXO will get spent? And alternatively, how do you be sure that the identical UTXO just isn't reused for the announcement; and what happens if that UTXO gets spent? So, will we need to be maintaining track of the UTXO truly not being moved whereas it is the stand-in to have introduced the channel? Mike Schmidt: The taproot and MuSig2 channel discussion somewhat leads into the up to date channel announcement discussion and how gossip protocol would should be upgraded as a way to help shifting to P2TR outputs. So, we need to change that, as a result of we'd like to permit taproot, which suggests permitting additionally input, particularly if we use MuSig2; we don’t need to reveal the inner keys.

And proper now, it’s going to make use of the same payment hash with all these nodes, which means that if someone owns two of the nodes in the path, they're studying information, and this is dangerous for privateness. Right now, everytime you send a payment, this payment is going to go through multiple nodes on the community. Bastien Teinturier: Sure. So proper now, after we announced the channel on the network, we explicitly introduced node IDs and the Bitcoin keys which are inside the multisig 2-of-2, and people verified that the output that we are referencing is definitely locked with the script hash of multisig 2-of-2 of these two keys, so you'll be able to only use it with scripts that really observe the format of Lightning channels with out taproot. Mike Schmidt: Murch or youtu.be t-bast, every other feedback on taproot and MuSig2 channels? Mike Schmidt: Go ahead, Murch. Mike Schmidt: Next section from the Summit discussed PTLCs and redundant overpayments. Bastien Teinturier: Okay, so PTLCs are a change that's allowed by taproot and adaptor signatures.