Homework on Stale Blocks

Blockchain and Bitcoin 101
#4475

1 - One will win eventually win, the longest chain will end up winning and the shortest one will be abandoned
2 - A stale block is an orphaned block on the shortest blockchain that will end up being dropped
3 - Stale block occurs when two blocks are created almost at the same time, before the 10 mins limit and prior long enough propagation
4 - To ensure that the block containing the transaction is going to be accepted as the unique version of truth by the network

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#4476

  1. The miners move on to the next block and eventually the network will settle on the chain with the longest proof of work.

  2. A stale block is a block that was part of a chain that was dropped due to it not being part of the longest PoW block.

  3. Stale blocks may occur when different valid blocks are accepted by different nodes within the network.

  4. To avoid your transaction not ultimately forming part of the blockchain because it was part of a stale block that was ultimately dropped and returned to the mempool.

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#4477

  1. Some nodes will add the block of one miner in their copy of the blockchain and other nodes will add the block of the other miner and the next block that is mined on top of either block the fastest with the most difficulty will become the actual block of the true chain that is propagated throughout the entire network.

  2. A legitimate block that has been dropped and transactions returned to the mempool.

  3. When a block that has been dropped due to another legitimate block taking its place by being processed and accepted by other nodes faster.

  4. The longer you wait for more confirmations the less likely the block that your transaction is in will become stale.

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#4478

1- There are two versions of truth, eventually the longest chain(chain with more pow) will win, and the transactions in the discarded block will be putted back into mempool
2. A valid block, not accepted by the network, because is in the shortest chain
3- Because is also a physical network, and the problem is solved by two miners, but eventually only will go will survive
4-To be sure that you are in the correct version of truth and your transaction it’s not going to be dropped

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#4479

  1. Blocks will be in the blockchain. Next miner will decide which will be the right blockchain through connecting.

  2. A stable block is a block which is at first step in the block chain. This one comeptitions with another. When the next .iner comes and decides for the other block, this block will be dropped out and won´t be in the blockchain anymore.

  3. They occur because two miners will find a block in the same time and connect their blocks to the blockchain. After that one will be dropped out of the blockchain and thats how it will occur.

  4. Its safer because the chance is higher that the block will be synchronized from all the network.

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#4480

  1. Both blocks are valid - for a while. Until the next block comes, and whichever of these two gets to become the longest chain is valid, with the other one being dropped.

  2. A block that has been dropped by the network due to becoming the shorter chain.

  3. When there are two valid blocks at the same time and one of them gets an additional block faster than the other one.

  4. To make sure the block that sent the transaction is valid, preventing funds from being sent back to the original wallet.

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#4481

01 What happens in the bitcoin network when two miners solve a block at the same time?
When two miners solve a block at the same time, they both start propagating that block through the network and in that case, some nodes may have one block from the first miner while the other nodes may have the other block from the second miner. This would result in the network having conflicting thoughts about which block is the next block.
02 What is a stale block?
A stale block is a block that has the shortest proof of work when compared to another block that is competing for the same index position in the block chain. The stale block will be the one that is dropped/not accepted.
03 How do stale blocks occur?
Stale blocks happen when two conflicting blocks are competing for the same position in the block chain. The one with the shortest proof of work has to be dropped.
The other block will be dropped and all it’s transactions will be sent back to the mempool (each node will proceed).
04 Why is it important to wait for more than one block to be confirmed when sending or receiving a transaction?
To ensure that the block containing the transaction is not a stale block and will not be dropped in the near future, it will be a great idea to wait for multiple confirmations. This will allow time for the whole network to propagate the block throughout all nodes.

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#4482

  1. When two miners solve a block at the same time the next block mined will get appended to one of those blocks making that chain now longer. The block on the shorter chain will get dropped and the transactions will go to the mempool.

  2. A stale block is a block that was on the blockchain at one time but was dropped due to a longer chain on the blockchain without that block in it.

  3. Stale blocks occur when 2 blocks are produced at exactly the same time.

  4. It is important to wait for 6 confirmations as there is a chance your block could be dropped so this decreases the likelihood this will happen.

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#4483
  1. 2 blockchain versions occur.
  2. When the next block chooses one of the blocks of the previous two, the one which isn’t picked is cast out of the system and becomes a stale block.
  3. Because there is a chance to be a stale block. Confirmed by 6 blocks is the best practice.
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#4484
  1. What happens in the bitcoin network when two miners solve a block at the same time?

The less difficult one has to be dropped, all transactions in that block are put back to mempool.

  1. What is a stale block?

A stale block is the valid block, but not accepted by the network, has to start over again.

  1. How do stale blocks occur?

Because of physical distance in the globe network, two miners slove different block at the same time, but not knowing the other one exists.

  1. Why is it important to wait for more than one block to be confirmed when sending or receiving a transaction?

To avoid the stale block or orphaned block occur.

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#4485

  1. It will be intact until one of those blocks has a longer chain at a certain speed and time.

  2. Stale block or blocks are the blocks left behind after the whichever of the competing miners have the longer blockchain.

  3. Stale blocks occur when a miner mines the longer blockchain.

  4. Confirmation in the blockchain and avoiding stale blocks.

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#4486
  1. When two miners solve a block at the same time the chain is temporarily forked until another block is added to one of the forks, this becomes the chain with a higher POW and consensus dictates that this becomes the valid chain.
  2. A stale block is a block from a temporary fork that has been invalidated by consensus by the blockchain. All transactions from the stale block are returned to the mempool.
  3. Stale blocks occur when two miners solve a block at the same time and the chain is temporarily forked. The block from the forked chain that doesn’t meet consensus with the network is invalidated and becomes a stale block.
  4. It is important to wait for >1 blocks to be added to the blockchain to confirm the transactions have been verified and consensus achieved and to be certain that the block your transaction is in wasn’t part of a forked chain and become a stale block.
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#4487

What happens in the bitcoin network when two miners solve a block at the same time?
It is up to the next minor (3rd) choose which block to mining.
Let’s imagine both of this miners (block A and block B) produce block at the same time and now they propogate their block to the network and both of these block valid.
And then the next minor choose block B and continue propogate to the network.
Block A will be removed and all transaction in this block will return to the mempool.

What is a stale block?
Stale block are the blocks that were in the blockchain at same time but then got dropped because there’s another version of blockchain that is simply longer without those block in it.

How do stale blocks occur?
If there’s the block that coming out at faster rate (less than 10 minutes).It also mean the block
will not be able to propogate to entire network before new block is out and that block will start propogating before the first block even finish
propogating and in that sense.You have two block competing with each other and one of them might be dropped.

Why is it important to wait for more than one block to be confirmed when sending or receiving a transaction?
The best practice is to wait 6 confirmation just to be sure that your block dosen’t get dropped.

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#4488
  1. What happens in the bitcoin network when two miners solve a block at the same time? Both blocks continue until one block becomes longer than the other block
  2. What is a stale block? A stale block is a block that has been removed from the blockchain because it wasn’t selected to continue on the blockchain.
  3. How do stale blocks occur? Stale blocks occur when a block is removed from the blockchain after being part of the blockchain.
  4. Why is it important to wait for more than one block to be confirmed when sending or receiving a transaction? It’s important to wait until a least 6 blocks have been confirmed to reduce the risk of being removed/becoming a stale block.
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#4489

  1. If they solve a block at the same time. Whatever block ends up being longer will be added to chain. This happens by another miner continuing the block of their choice.

  2. Is a block that does not get added to the blockchain and the transactions are added back into the mem pool

  3. Stale blocks is the result of the blocks that do not get added to the blockchain after two miners solving at the same time is resolved. The “loser” does not get added to the block chain and their blocks are added back to the mem pool.

  4. It’s important to wait for more than one block because you don’t know if your block will for sure be added. There could be situations were blocks are mined at the exact same time and time is needed to determine which block will be added and which will end up back in the mem pool.

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#4490

  1. the miner with the highest quantity of quality blocks will win the block reward, the ‘second best’ miner / blockchain is sent to the mempool in shame…

  2. a stale block is the lower quality block at the fork and it’s moved to the mempool, this happens when two miners solve the block at the same time, the miner with the highest quantity of quality blocks win the block reward producing the byproduct of what we call a stale block.

  3. they occur when miners solve the block at the same time.

  4. because of the stale block event, it’s in best practice to make 6 confirmations, in the occurrence that a stale block is sent to the mempool your transactions are dropped from the chain.

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#4491

  1. They will both start propagating their blocks. And at the end, the network will only accept the longest chain and the transactions in the unaccepted blocks will be returned to the Mempool

  2. A stale block is a block that was previously mined and added to the blockchain, but was removed because another chain was accepted

  3. When two miners archive the target, and start propagating their new blocks at the same time. Then the network end up with two or more version of the chain. So the network chooses the longest chain and drops all the other unaccepted blocks.

  4. To allow time for the block to be propagated and accepted.

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#4492
  1. What happens in the bitcoin network when two miners solve a block at the same time?

Both of the blocks will get added/appended to the network.

  1. What is a stale block?

A stale block is a block that was confirmed on the blockchain at one point; but was then kicked off because a longer version of the blockchain was verified.

  1. How do stale blocks occur?

It occurs by two miners solving the puzzle at the same time and getting both of their blocks added to the blockchain. Some of the transactions in such respective blocks will be different, thus leading to two different versions of the blockchain. When the next block is mined and gets added to one specific path, that it is when the other path is deleted from the blockchain. This deleted block ends up becoming either a stale/orphaned block.

  1. Why is it important to wait for more than one block to be confirmed when sending or receiving a transaction?

You want to allow time for your block to be confirmed, so procedure is to let 6 new blocks be confirmed after yours. This will highly reduce the event of your block becoming a stale block and losing your transactions.

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#4493

  1. The network will just keep running like always and the network (miners) will decide on which block of the two they’ll continue mining. The other block will eventually be removed and the transactions of the removed block will return to the mempool.

  2. Block that are removed/ dropped from the network.

  3. These stale blocks where once ‘valid’ blocks because the particular miner guessed the nonce correctly, but other miners decided to continue mining on an other correct block. So the block will be removed, because it’s no longer valid.

  4. Nodes can have different versions of the blockchain. So it’s possible that your transaction will be in a stale block that eventually will be dropped. That’s why it’s important to wait for 6 confirmations.

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#4494
  1. The longest chain will win, other block will be dropped and deemed a stale block.
  2. A stale block is the product of the competition between 2 miners. the “losing” miner will be dropped and is then considered a stale block.
  3. Stale blocks occur when 2 miners are mining the same block. whichever miner has the longer chain will “win” and the other block will “lose” and becomes a stale block. It is released back to the mempool.
  4. To ensure the block with you transactions won’t be dropped and become stale. The longer the chain, the better.
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