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This week’s newsletter describes the results of discussion about choosing activation parameters for a taproot soft fork and includes our regular sections with selected questions and answers from the Bitcoin Stack Exchange, releases and release candidates, and notable changes to popular Bitcoin infrastructure software. 910 updates the LN specification with two changes. Participants reviewed the PR over two meetings. Participants noted that Miniscript has helped optimize LN templates in the past. Additionally,

given some policy, the compiler generates a minimal Miniscript script (not necessarily the smallest possible, since Miniscript only encodes a subset of all scripts), which may be smaller than a hand-crafted one. Miniscript enables analysis of the maximum witness size and thus the ‘worst case’ cost to spend the output at a given feerate. 24408 adds an RPC to fetch mempool transactions spending from a given outpoint, streamlining the search for outpoints by selecting transactions individually rather than from a list of txids retrieved from getrawmempool. 22751 adds a simulaterawtransaction RPC which accepts an array of unconfirmed transactions and returns how much BTC those transactions will add or subtract from the wallet’s balance. Although it’s already possible to refer to the key in those cases using the existing raw() descriptor, which is primarily meant to be used with tools like Bitcoin Core’s scantxoutset RPC for scanning its database of UTXOs, the new rawtr() descriptor makes it easier to use other existing descriptor fields to associate additional information with the taproot output such as key origin information.

As I showed above, there's no way you could make money off mining on the IBM 1401. I did, however, really implement and run the SHA-256 algorithm on the IBM 1401, showing that mining is possible in theory. This is known as commodity money because the value is in the actual material from which it is made. Bitcoin is a virtual currency and has no tangible value that you can hide under the bed and use in difficult times. If any input value for any of these commands is longer than 4 bytes, the script must abort and fail. If bitcoin becomes the money we use in our daily lives, it must also become a unit of account. A sane node must be valid and its script semantics must match its policy, be consensus-valid and standardness-compliant, only have non-malleable solutions, not mix timelock units (i.e. use both block height and time), and not have duplicate keys. ● LND 0.15.0-beta.rc4 is a release candidate for the next major version of this popular LN node.

● What is the purpose of indexing the mempool by these five criteria? Murch and glozow explain the different mempool transaction indexes (txid, wtxid, time in mempool, ancestor feerate, and descendant feerate) in Bitcoin Core as well as their usages. This week’s newsletter includes our regular sections with the summary of a Bitcoin Core PR Review Club meeting, a list of new software releases and release candidates, and descriptions of notable changes to popular Bitcoin infrastructure software. ● Core Lightning 0.12.0rc2 is a release candidate for the next major version of this popular LN node implementation. Miniscript expressions can be represented as trees of nodes, where each node represents a fragment. What does it mean when a node is "sane" or "valid"? Do they mean the same thing? It is not exactly the same but it is very close. 151), which allows receiving the funds from a mutual close of a channel to a taproot output.

The first allows Short Channel Identifier (SCID) aliases which can improve privacy and also allow referencing a channel even when its txid is unstable (i.e., before its deposit transaction has received a reliable number of confirmations). Mt Gox requires a copy of government-issued photo ID and proof of address before a person can convert between conventional currencies and bitcoins. One other aspect of the regulation states that only "approved virtual currencies" can be sold, bought or promoted. A blockchain-based distributed app helps to prepare a system that can store a large amount of data that cannot be manipulated. For example, if an attacker can stuff extra data into the witness and still satisfy the spending conditions, they can lower the transaction’s feerate and negatively impact its propagation. Its release notes note that it includes breaking API changes but also numerous new features and bug fixes, including support for compact block relay data structures (BIP152) and improvements to taproot and PSBT support. This week’s newsletter includes our regular sections summarizing popular questions and answers from Bitcoin Stack Exchange, announcing new software releases and release candidates, and describing recent changes to Bitcoin infrastructure software.