Warning Signs on Bitcoin You Should Know

The Winklevoss twins have purchased bitcoin. ● Address input field length restrictions: some services might have supported sending to bech32 addresses, but when we attempted to enter a bech32 address, either it was rejected as being too long or the field simply refused to accept all the characters. 3. Test again with the uppercase form of each address (these are useful with QR codes). The proposed implementation also makes it easy for teams to create their own independent signets for specialized group testing, e.g. signet author Kalle Alm reports that "someone is already working on a signet with bip-taproot patched on top of it." Signet has the potential to make it much easier for developers to test their applications in a multi-user environment, so we encourage all current testnet users and anyone else interested in signet to review the above code and documentation to ensure signet will fulfill your needs. ● Help test Bitcoin Core 0.18.1 release candidates: this upcoming maintenance release fixes several bugs that affected some RPC commands and caused unnecessarily high CPU use in certain cases. 3025 updates the listfunds RPC with a blockheight field for confirmed transactions indicating the height of the block containing them.

Another notable difference is in how the two networks validate transactions. ● Additional Just-In-Time (JIT) LN routing discussion: in the JIT discussion described in the newsletter two weeks ago, contributor ZmnSCPxj explained why routing nodes needed zero-fee rebalance operations in many cases for JIT routing to be incentive compatible. When carve-out was added, the exception to those rules was not applied to transaction replacements, so nodes would accept carve-outs but not RBF fee bumps of them. 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. In some cases, this may have been done for privacy benefits (e.g. Bitcoin Core currently tries to match the type of change output to the type of payment output) but, in most cases, this seems like a missed opportunity for wallets to send change to their own bech32 addresses for increased fee savings. For example, a motivation for the change was allowing bloom filters to be provided to particular peers (such as a user’s own lightweight wallet) even if the filters are disabled by default.

The RPC already added a checksum to any descriptor provided without one, but it also normalized the descriptor by removing private keys and youtu.be making other changes users might not want. True for wallets that have private keys disabled (i.e. that are only useful as watch-only wallets). For instance, wallets and similar software technically handle all bitcoins equally, none is different from another. Some software - such as Bitcoin apps developed for Android smartphones - has generated random numbers improperly, making them easier to guess. 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). In theory, the channel can still be used after this-which is why it isn’t closed-although the node may not have enough funds to initiate a spend, possibly making receiving its only option unless onchain feerates drop. However, many of these wallets also use P2SH-wrapped segwit addresses for receiving change sent from themselves to themselves. Although this isn’t the near-universal support we’d like to see, it may be enough support that we’ll soon see more wallets switching to bech32 receiving addresses by default.

● Most tools support paying bech32 addresses: 74% of the wallets and services surveyed support paying to segwit addresses. 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. This week’s newsletter notes a change to Bitcoin Core’s consensus logic and announces a new feature on the Optech website for tracking technology adoption between different wallets and services. More recent innovations such as Atomic Multipath Payments (AMP) will allow the same invoice to be paid incrementally by multiple HTLCs, so this change makes it possible to independently track either individual HTLCs or the overall invoice. 41:44 Diego Zuluaga: I think the developments, the very specific developments around Bitcoin from its start, lead to it being more attractive than others, because there was no one, no individual person identifying themselves and saying, "I’m the leader of this project. There are several coins out there that can be mined using nothing but your CPU, but don't expect it to be very profitable unless you have a ton of machines.