This week’s newsletter describes a demo implementation of eltoo and several discussions related to it, requests comments on limiting the normal number of LN gossip updates to one per day, and provides our longest-to-date list of notable changes to popular Bitcoin infrastructure projects. Myers’s sample implementation works by using the Bitcoin Core functional test framework to simulate payments in an eltoo payment channel. Bitcoin (BTC) is a cryptocurrency, a virtual currency designed to act as money and a form of payment outside the control of any one person, group, or entity, thus removing the need for third-party involvement in financial transactions. With this PR, RBF fee bumping of the carve-out is now possible, making it an even more useful tool for fee management of settlement transactions in two-party LN payment channels. 3078 adds support for creating and using channels that spend Liquid-BTC on the Liquid sidechain. For the first time ever, this testing can include creating a reproducible build of LND and verifying that it has the same hash as the binaries distributed by the LND developers. For scripts that need signatures or other data from multiple wallets, miniscript can guide the wallet into creating all the witness data it can so that the data can be bundled into a Partially Signed Bitcoin Transaction (PSBT).

If the finalizer is miniscript aware, it can sort the witness data from all the provided PSBTs into a single complete witness, making the spending transaction valid. With miniscript telling the wallet what it needs to do, wallet developers don’t need to write new code when they switch from one script template to another. However, only one order is allowed to be fulfilled. Taker trades occur on an order that trades immediately before going on the order book, regardless of whether you partially or fully fulfill an order. In some cases, the primary account number is assigned exclusively for use on the Internet and there is no physical card. Tolerating Bitcoins as installment at a block and mortar store is pretty much as simple as tolerating charge card or money installments on account of various Bitcoin vendor administrations accessible to little entrepreneurs. This hype and the perceived limited nature of coins has driven the price of bitcoins much higher over the last decade, though it continues to fluctuate significantly. Mostly, crypto traders are speculating on the prices of cryptocurrencies, trying to buy them at the lowest possible rate and sell for the higher price. All you need to do is choose and buy the cryptocurrency you wish to invest in.

Due to a security flaw in its system, the largest DeFi hack of all time lost $624M worth of cryptocurrency assets. When it came time to broadcast the transaction, they could use Child-Pays-For-Parent (CPFP) fee bumping to set an appropriate fee for the current network conditions. The system checks itself at every transaction, and it provides a directory (Blockchain) where every transaction is registered. If at least one of them doesn’t set this flag, they’ll fall back to the older protocol of using a different payout address for each commitment transaction, with the addresses created by combining the remote peer’s pubkey with a commitment identifier. Our goal was to gently persuade as many developers as possible to add support for paying bech32 addresses in their applications. The authenticity of each transaction is protected by digital signatures corresponding to sending addresses, allowing all users to have full control over sending Bitcoins from their own Bitcoin addresses. 3401 caps the amount of onchain fee that a node will propose paying in a channel update transaction (commitment transaction), limiting it to 50% of the node’s current in-channel balance (the 50% default is adjustable). An adversary that can map all of a node’s connections can attack that node, either by identifying which transactions originate from that node (a privacy leak) or by isolating the node from the rest of the network (potentially making theft of funds from the node possible).

We don’t usually cover refactors, sdfw2ef2.tistory.com but this one has a tantalizing comment: „this is in preparation for re-using these validation components for a new version of AcceptToMemoryPool() that can operate on multiple transactions (‘package relay’).“ Package relay could allow nodes to accept a transaction below the node’s minimum feerate if the transaction came bundled with a child transaction whose fee was high enough to pay the minimum feerate for both it and its parent. Alice can publish onchain must pay bc1bob and any commitment transactions that Bob can publish onchain must pay bc1ally. Other wallets can create their own PSBTs, all of which are given to a PSBT finalizer. ● Evaluate miniscript: wallet developers are encouraged to evaluate this proposed language that can allow wallets to adapt to new script templates without requiring changes to the underlying wallet code for each new template. 15450 allows users to create new wallets for multiwallet mode from the GUI, completing a set of GUI actions that also allows users to load and unload wallets. The LN protocol only allows the node that opens a channel to propose new commitment transactions with feerate changes, so this change only applies to channel initiators. 3545 adds code and documentation that allows users to create reproducible builds of LND.