spv – What is the distinction between BIP 157 and BIP 158? Are they supported by Bitcoin Core?

This response is a slight modification of the description used in the Bitcoin Optech Newsletter # 43. Full credit and thanks to Dave Harding!

BIP158 introduced Compact block filters, which are based on an efficient method of coding
a list of items of equal size. In the case of the "basic" block
filters described in the BIP, this is a list of all the
a scriptPubKeys expendable output in the current block plus all
the scriptPubKeys for the outputs expended by the entries of this block
(what the developers call the previous outputs (prevouts)). Each of
scriptPubKeys is hashed to give each element the same size, then
these items are sorted in a list containing duplicate items
removed. This list is then encoded using the Rice in Golomb
sets
Algorithm (GCS) also described in BIP158, lossless
reduce the size of the list. This specific base filter provides
enough information for anyone who knows a bitcoin address to find
any block containing a transaction paying this address
(output scriptPubKey) or spend funds previously received at this
address (previous script). Research can produce false postives
correspondences (thus blocks not containing transactions for this address)
will be included in the results), but will never give false negatives
(so blocks that make contain transactions for this address will never
be omitted from the results).

A separate BIP, BIP157, describes how these compact blocks
the filters can be served on the network using Bitcoin P2P
protocol. BIP157 is designed to work with BIP158 "basic" filters
but it can also be expanded to support additional filters
encode lists of other items. A particularly remarkable part of
BIP157 is that it introduces the concept of filter headers or
the header of each filter commits a hash of the previous block
filter header plus a hash of the current filter. This creates a
string of filters similar to Bitcoin's blockchain and is
designed to make it easy to compare filters from multiple peers:
each peer can only send the filter header (32 bytes) and, if it exists
are there any headings that do not match, the customer can request earlier and
the previous headers in the chain until the point of divergence is found.
Generate an on demand filter header for a particular block
would require hashing of all the previous filters, so the servers that provide
The BIP157 filter headers will usually need to store them in advance.

At the time of writing this article (April 2019), Bitcoin Core can generate and store
block filters and filter headers, and users can access them using the getblockfilter
PRC. Bitcoin Core does not currently provide blocking filters or filter headers.
on the P2P network.

here is an example getblockfilter return the object:

$ bitcoin-cli $ getblockfilter (bitcoin-cli getblockhash 170)
{
"filter": "0357e49590040c79b0",
"header": "349eaecc8bb7793c9f3c28e78df6675ef904515e9a310e4532785aeb45526090"
}

We selected block 170 because its filter is the first to contain
more than one element (it contains 3 elements) and because the last
the block from this write (block 572,879) has a filter that contains
8,599 items – way too much for us to print with elegance.

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Can I predict moments of high volatility / big movements for Bitcoin?

In the stock market, we can know in advance that in certain moments there can be a big move towards one of the sizes. For example, on the announcements concerning gross domestic product (GDP). Are there special moments that we can expect from large cryptographic movements?

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QUOTE

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QUOTE

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Bitcoin is the world's first cryptocurrency. It is a system of transactions and currency peer to peer created by Satoshi Nakamoto and based on a decentralized public book. This was based on the consensus called blockchain that records all transactions.

Cryptocurrency was used for the first time in 2009. In July 2010, the price in bitcoins was only 8 cents. In one year, the new alternative currency had reached 1 dollar and became a promising prospect for the future.

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banner_125.gif "src =" https://btca.biz/styles/images/banner_125.gif "/>
</p>
<p>I am not an administrator here!</p>
<blockquote class=

Welcome to btca.biz

Are you looking for the best return on your investments? btca.biz is an automated online investment platform that is part of btca.biz, a team of professional traders who focus primarily on bitcoin and other cryptographic currencies across multiple exchanges and markets. Thanks to the extraordinary diversification of our investments, we are able to generate stable income for our investors.
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banner_468.gif "src =" https://btca.biz/styles/images/banner_468.gif "/>
</p>
<p>
<strong>Standard plan: 35% to 50% time for 3 hours</strong><br />Plan Deposit Amount Hourly Profit (%)<br />Plan 1 $ 1.00 – $ 1000.00 35.00<br />Plan $ 2,100.00 – $ 5000.00 40.00<br />Plan $ 3,500.00 – $ 10,000.00 45.00<br />Plan 4 $ 10001.00 – $ 50000.00 50.00
</p>
<p>
<strong>Popular Plan: 18% to 25% schedule for 6 hours</strong><br />Plan Deposit Amount Hourly Profit (%)<br />Plan 1 $ 1.00 – $ 5000.00 18.00<br />Plan $ 2,5001.00 – $ 10,000.00 20.00<br />Plan 3 $ 10001.00 – $ 50000.00 22.00<br />Plan 4 $ 50001.00 – $ 150000.00 25.00
</p>
<p>
<strong>VIP package: 0.1% – 1% per hour for 3600 hours</strong><br />Plan Deposit Amount Hourly Profit (%)<br />Plan 1 $ 1.00 – $ 10,000.00 0.10<br />Plan 2 $ 10001.00 – $ 50000.00 0.30<br />Plan 3 $ 50001.00 – $ 150000.00 0.60<br />Plan 4 $ 150001.00 – $ 250000.00 1.00
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<blockquote class=

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<blockquote class=

The amount of $ 120 has been withdrawn from your account.

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CAN I RECEIVE BITCOIN FROM PANAMA FLORIDA

Can I receive BITCOIN from (Panama, Florida) on my Nigeria BITCOIN portfolio? Someone from Panama City, Florida, will buy and send me $ 600 worth in Bitcoin. She did not create the account that she will do. I want to know if she will be able to create the account then buy the bitcoin at $ 600 and then send it to my bitcoin wallet here in Nigeria … Please, I need to. a certified reply .. Thank you

bitcoin core – hash rate, transaction, and block relationship

I am aware that when the hash of the block hash is below the difficulty target, a block is considered validated.

But since I had never executed a bitcoin node before (it's not for soon), I had some questions about the extraction process.

1) When minors run the BTC software, do they default to the transactions in the memory pool based on the higher fees, or are they allowed to choose which transactions to validate?

2) If you have a higher hash rate, does this mean that you can also commit transactions faster?

3) When a block is validated on average every 10 minutes, as defined by the BTC protocol, do the miners also try to validate transactions?

4) How are transactions validated?