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mining pools – How does a Bitcoin block get generated and ‘agreed upon’ by everyone?

Miner ASICs have one job: Change the meaningless parts of the block until the difficulty target (related to the hash of the block) is satisfied.

ASICs connect to the pool to first download the block template (they regularly do that – maybe every few seconds?). The block template contains the transactions. They calculate the merkle hash of the transactions, embed it in the block header, and hash the block header many times.

When the target is satisfied, the block is published. From then on, no one can change the transactions in the block.

all that work is wasted

This is a lottery where everyone’s chances of finding the next block is proportional to their hashrates. If you need to mine all day to find one block per day — congratulations! You can afford solo mining and you don’t lose anything, and your reward is fair.

Trivia: Block mining is a Poisson process. One property of this is memory-less-ness. That is, given that the average time until the next block is 10 minutes (it is for Bitcoin):

  • After about how many blocks will someone find a block if everyone started just now: 10 minutes (t = 10)
  • What if you all had been mining for 2 minutes? Still 10 minutes (block to be released at t = 12)
  • What if you all had been mining for 20 minutes? Still 10 minutes (block to be released at t = 30)

Here’s a fun puzzle by Russel O’Connor and Pieter Wuille.

So, there is no wasting in mining: it’s memoryless. If you fail, you just keep trying, and everything works as intended in the end.

blockchain – Understanding Transactions, Mining, and the 10 minutes block solved

How do miners decide how many transactions they should have in a block in order to mine 1 bitcoin?

The amount of work miners do has no impact on the amount of Bitcoin they make. The block subsidy is a fixed amount, and transaction fees are determined from transactions. Mining 1 Bitcoin does not require some specific amount of work.

Miners determine how many transaction they should have by determining how much in transaction fees they stand to gain from including those transactions. This is typically done by ordering all known unconfirmed transactions by their fee rate. Then the miner just includes as many transactions that is allowed by the consensus rules, starting from the transaction with the highest transaction fees.

When miners compete to find the “nonce” that has the smallest possible hash number, would it be faster/easier to find the “nonce” if there are fewer transactions?

No. The number of transactions has no significant effect on the difficulty of a block or the amount of work required to mine a block. While including more transaction nominally requires computing more hashes, this is negligible in the grand scheme of things, especially since this calculation is only done once for a set of nonces and extraNonces.

Do all miners try to solve a solution where all the transactions should be the same in a single block and everyone’s trying to compete to finding the nonce and hash?

Everyone chooses their own set of transactions to include. Everyone is making their own block, just each block points to the same parent block.

Or is it random, and its just whoever finds a hash the quickest, saves those transactions and adds it to the blockchain?

It is entirely random. It’s however finds a block first and broadcasts it.

Also, I noticed looking at btc.com, there are blocks being mined less than 10 minutes back to back, I thought it needs to be 10 minutes to be mined?

The average time between blocks is 10 minutes, but that is an average, not a requirement. Blocks can be found in less than 10 minutes, or more than 10 minutes. The average block is ~10 minutes.

Does bitcoin mining pool hash randomly and separately

Most mining pools use the stratum protocol. Part of this protocol includes a field for part of the extraNonce, named extraNonce1. The extraNonce is just extra data that is put in the coinbase transaction and used as a nonce in addition to the block’s nonce. Each mining worker can then append their own extraNonce to extraNonce1. This second part is named extraNonce2

Typically what mining pools do is they issue work to each worker with a different extraNonce1. This allows the worker to use the entirety of the nonce field as well as their own space for extraNonce2. The submitted work can also be identified to belong to a particular worker by examining the extraNonce1.

I’m not sure how specific mining pool software determine what extraNonce1 to give out, but an obvious method would be to do so sequentially – each time work is issued, extraNonce1 is incremented so that each worker gets something different to work on.

mining pools – Higher Hashrate VS Incorrect Shares

I recently started mining eth on my 5700 bios flashed to XT, mining on Nanopool. Getting around 48MH/s but i saw a method by Red Panda Mining which can increase my MH/s by around 10 giving me 60MH/s but a high ratio of incorrect shares using a config edit on Phoenix Miner. Im wondering if this is worth the increase in hashrate but ultimately still leads me to incorrect shares. My incorrect share rate is 2:1 using this edit. Thoughts?

how to fix mining software make error? bfgminer bitcoin

so i have bfgminer up on a linux machine running fine purring away at 67Mh/s solo mining (geforce gtx460)

im attempting to build on a windows 10 machine

i have tried msys2 mgwin32 and 64 bit

nothing seems to work i get errors in all stages: autogen, configure and make

im using mgwin64bit now and got to the make stage succesfully…

i am able to autogen, configure but when it comes to make i get an error:

make(3): Leaving directory '/home/virtu/bfgminer/libblkmaker'
  CCLD     bfgminer.exe
C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/10.2.0/../../../../x86_64-w64-mingw32/bin/ld.exe: bfgminer-miner.o:miner.c:(.rdata$.refptr.cpus(.refptr.cpus)+0x0): undefined reference to `cpus'
collect2.exe: error: ld returned 1 exit status
make(2): *** (Makefile:1340: bfgminer.exe) Error 1
make(2): Leaving directory '/home/virtu/bfgminer'
make(1): *** (Makefile:2844: all-recursive) Error 1
make(1): Leaving directory '/home/virtu/bfgminer'
make: *** (Makefile:1209: all) Error 2

Could someone help me come up with a solution?

in the meantime i will return to mingw32 and attempt to fix the no gcc or c compatible compiler issue on autogen/configure

Iran's new crypto mining law requires crypto miners to sell directly to central bank

As reported by Bitcoin.com, Iran has made a new revision to its crypto mining law and now the new law requires licensed miners to sell their crypto directly to the country’s central bank. This is done so that the funds from crypto mining can be used to fuel the country’s import. The government has tasked the ministry of energy to regulate crypto mining operations in the country.