Thanks!

It's a pretty dumb bot that just looks for the same spam posts, e.g. the knc spam post. So long as the text remains the same, it will remove such posts.

Recently I have been seeing a newly created account creating a post with just the words
and that being a link to somewhere (some linkedin page IIRC). The title of the post is usually nonsense.

Can we get the anti-spam bot on this? It's getting annoying to report those every single time.

For example: https://bitcointalk.org/index.php?topic=1588435.0;topicseen#msg15951451

That is correct, you can begin the block with OP_NOTIF.

You don't. There actually is no way to request a block by height over p2p in Bitcoin. In order to do so, you need to somehow get the hash. Really the only way is to start from the genesis block and start requesting every block and keeping count of what height you are at.

What node does your blockchain scanner query? What software is that node?

There are a few things that I think could have happened here. You may have somehow caught a fork. The block that you saw disappear could have been part of a fork that was subsequently invalidated by a longer chain. Or it is possible that you received an invalid block. Since blocks are sent headers first, it is possible that the header was good, but something in the block was wrong, so when it was validating the block, it failed and removed the block. But because it received the header first, it originally added it to the blockchain before removing it.

How about btcarmory.org? Currently available on godaddy

It's possible that your transaction is a double spend because you are not synced. This would make your transaction invalid and thus rejected.

You cannot cancel a transaction. Once it is broadcast, you cannot abort it.

However, you can remove the transaction from your wallet and resend it. First you need to sync your wallet. You can enable pruning to save space.

To enable pruning, add
To the bitcoin.conf file in your data directory.

Then follow the instructions at http://www.achow101.com/2016/07/Bitcoin-Core-Troubleshooting#stuck-tx to fix your problem.

It means Bitcoin Improvement Proposal. Theses are proposals to change something in the bitcoin protocol.

I'm not entirely sure how it is calculated, but the functions for getting all of that data is in the code at https://github.com/bitcoin/bitcoin/blob/37d83bb0a980996338d9bc9dbdbf0175eeaba9a2/src/rpc/blockchain.cpp#L633

You need to set inv type 3, MSG_FILTERED_BLOCK. But in order to do so, you first must set a bloom filter using filterload.

Block Hash.

You first do the handshake with the version messages. Then you have to set a bloom filter using filterload. Then you send a getblocks message and the node returns you an inv. Then you can send a getdata and you will get a merkleblock in response.

BTW, it's merkleblock and merkle root, not memkle.

Post quality is subjective. To have high post quality, most of your posts must be relevant to the thread, informative, and contributes to the discussion. Posts that are considered spam are usually very short (but not always), contains nothing meaningful, or repeats what everyone else in the thread has already said.

In order to post with good quality, you must first read the thread you want to post in, then consider whether the post you are making contributes to the discussion. If it does not contribute, don't post. If you are posting for the sake of posting in order to increase your post count, don't post.

Not sure if this was already reported.

I don't see any of my addresses having a balance when I look at the wallet properties. But I can still send (at least fairly sure that I can) Bitcoin. But coin control doesn't work.

You should definitely do that. I setup a github pages site for Armory a while ago. Take a look http://www.achow101.com/BitcoinArmory/ and https://github.com/achow101/BitcoinArmory/tree/gh-pages. It hasn't been updated, but I can update it.

Yes.

The seed is for a heirarchical deterministic wallet. It is used to generate multiple keys. Paper wallets are just one key, thus there is no seed. If you want some sort of "seed" for a private key, then you need to use a brainwallet. However, I highly recommend against this since brainwallets are insecure, especially when the user has to think of the word to use as the seed.

The list is there forever because it is a list of all of your transactions. Without it, you wouldn't be able to send any Bitcoin because the software wouldn't know what it can spend from.

You can change those. Just go to the transactions tab and right click on a transaction. Then choose the option for "Edit label".

There's also abe: https://github.com/bitcoin-abe/bitcoin-abe

That transaction is already confirmed, there is nothing you can do about it. Bitcoin transactions are not reversible.

Make sure that your computer has no viruses. There are viruses that exist that modify your clipboard so that the address that it pastes is an attackers. These viruses can be hard to detect though.

You can do that using coin control to select the inputs that you want to spend. Otherwise, the wallet will automatically choose which inputs to spend and it may end up linking your addresses.

It isn't recommended because it can both hurt your security and your privacy. By reusing addresses, people who pay you can easily see how much money you have. It becomes fairly easy to track who you are paying and how much. New change addresses also makes it possible to say that the change was going to someone else and not back to yourself; it allows for plausible deniability, something you can't do with reusing addresses.

For security, using new addresses and never reusing addresses will help protect against any attack that would break ECDSA (any attack in which a private key can be found from a public key in a meaningful amount of time). When you spend, you are really spending to the hash of a public key. Once you spend the Bitcoin from that output, you will be revealing the public key in the spending transaction. This makes it potentially vulnerable to be cracked. However, if you always use new addresses, then your Bitcoin is still safe as by that time the public key is revealed and the private key cracked, the Bitcoin should already have been spent.