Homework on Stale Blocks

Blockchain and Bitcoin 101
#1706

  1. There are now 2 versions of the blockchain propagating in the network.

  2. A block that is no longer part of the blockchain.

  3. A block can be added to the blockchain, but then a longer version of the blockchain is found (and does not include that block), thus rendering that block stale or orphaned.

  4. To make sure that the transaction is not part of a block that will become stale or orphan.

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#1707
  1. there will temporarly exist two versions of the blockchain, until the longer chain wins
  2. a stale block is a block that was part of the chain that “looses” to a longer chain when two blocks are found at the same time, the shorter chain and the stale block is discarded
  3. see 2
  4. because of stale blocks, otherwise the temporarly approved transaction might be part of a block that gets staled
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#1708
  1. each miner makes his own version of the blockchain and sends out to nearest nodes, then the next miner chooses one of those blocks and continues to build the chain. The longest chain survives and the shortest block gets dropped - transactions go to mempool again.
  2. Stale block is this block that got dropped and it’s transactions sent to mempool
  3. Stale block is made when a longer chain of blocks accur
  4. It’s important to wait at least 6 confirmations to make sure that the block my transaction is in is not dropped and sent back to mempool
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#1709
  1. What happens in the bitcoin network when two miners solve a block at the same time?

Both miners will start propagating their blocks in the network so they would be multiple versions of the truth, the longest chain that can be created in the meantime by the maximum number of nodes will win and will be integrated in the blockchain.

  1. What is a stale block?

Those are the blocks that could not be added to the blockchain because the larger one won the race. So those stale blocks and transactions will return to the Mempool.

  1. How do stale blocks occur?

When there are multiple versions of the Blockchain but could not get to be added because the longest version of the truth always win.

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

To make sure that your block is added to the Blockchain and it will not be returned to the Mempool.

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#1710

  1. When two miners solve a block at the same time both versions of the block chain will continue to spread through the network through different nodes

  2. A stale block is a block that is no longer part of the block-chain network

  3. A stale block is the block that gets dropped from the network in the case two or more miners add their blocks to the network at the same time. Occurs after one of the different versions in the blockchain gets the most proof of work, thus gets the longest blockchain and is considered as the only version of truth.

  4. Its important to wait for more than one block to be confirmed when sending or receiving a transaction because it will decrease the chances of your transaction being included in stale block

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#1711

  1. Both are recognized but only 1 is confirmed if the next miners appends their block to blockchain the block that is longer with more transactions is validated at the correct blockchain.

  2. A stale block is a block that was once on the network but was dropped due to another block having more transaction and validated as the next block.

  3. Stale block occur when competing miners figure out nonce at the same time but another miner has chosen to append his block to the miner which has a more difficult transaction to solve also know as a fork.

  4. So the blocks are validated correctly and you want have problems with stale blocks going back to the mempool. 10 minutes is sufficient time.

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#1712

  1. The block with more connections to the Bitcoin network will be first accepted by the network.

  2. A stale block is a block which was once in the blockchain but has been replaced by another and is thus no longer in the chain.

  3. A stale block occurs when there is a fork and another block has been accepted instead of this one due to it being connected to a longer chain of blocks.

  4. Because your transaction could be potentially part of a block that could become stale until there have been 6 blocks mined afterwards.

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#1713

  1. What happens in the bitcoin network when two miners solve a block at the same time?
    -both blocks are valid and so added to blockchain resulting in 2 parallel versions of blockchain.

  2. What is a stale block?
    -in case of the scenario above , resulting longer blockchain takes precedence and so the shorter version of the blockchain ceases to exist and therefore results in one or more so called “stale blocks”

  3. How do stale blocks occur?

  • version of blockchain that has not been accepted by the majority of nodes due to its shorter length of blocks
  1. Why is it important to wait for more than one block to be confirmed when sending or receiving a transaction?
    in order to make sure that your transaction does not become a part of the stale block and thus sent pack to the mempool
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#1714
  1. One block will eventually be accepted by the network and the other block will be orphaned. The most secure line of hashing will be accepted and the competing block will be sent back to the mempool.
  2. Stale blocks are the competing blocks that were orphaned when the more secure block was accepted into the network’s chain.
  3. When two competing blocks are vying for confirmation by the network, the less secure of the two will be rejected as unused or stale blocks.
  4. Waiting for confirmation of the proceeding block ensures that a party’s transaction is valid and sealed into the chain. It is possible that the transaction is orphaned along with the block so immediate confirmation is not feasible.
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#1715

eventually one will get dropped even though they are both valid blocks it depends on ho long the blockchain is

stale block is a block the is dropped from the blockchain

staleblock occurs when it is dropped from the blockchain because it had shorter on blocks

to see if block wont get dropped

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#1716
  1. In that case, the network will have two true chain.
  2. The block that is not appended by the next confirm block becomes stale block and gets dropped in the network. All transactions will be put back into the mempool.
  3. When (1) and (2) happen.
  4. To avoid such stale block happen.
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#1717
  1. When two miners volve a block at the same time in the bitcoin network, it creates a soft fork, with both miners propagating each their own version of the updated blockchain
  2. A stale block is a block which had valid transactions and got properly mined and validated with an adequate nonce, but got dropped from the block chain because it is part of the shorter Blockchain in a soft fork
    3.Stale blocks occur when 2 miners propagate each their own version of the blockchain with different transaction in the latest block resulting into two competing blockchains until one of them becomes longer and the other is dropped
  3. It is important to wait more than one block when sending or receiving a transaction to ensure that our transaction does not end in a stale block and returned to the mempool
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#1718

  1. When two miners solve a block at the same time, there will be two different versions of the blockchain on the network. Whichever version is the first to have the next block added onto it will be the longest chain and thus what is considered the valid chain. The other block versions will be dropped and transactions returned to the mempool.

  2. A stale block is a block that has been dropped, because it is no longer part of the longest chain. They are created when two miners solve a block at the same time and there are two versions of the blockchain, only one of them will get the next block added to it, and be considered the longest chain.

3.Stale blocks occur when a block is dropped because it is no longer part of the longest chain. This happens when two miners solve a block at the same time, and for a while there is 2 versions of the blockchain, whichever one has a block added to it first is considered the longest chain and the other is dropped and considered a stale block.

  1. The reason that it is important to wait for more than 1 block is because a block could end of becoming stale and dropped from the network, so it is best to wait for 6 block confirmations.
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#1719

  1. When 2 blocks appear at the same time - the 3rd miner chooses one of them to append the following block and this way a fork is created. The block that was not chosen for continuation of blockchain returns to mempool

  2. The stale block (orphaned block) is one of the “fork blocks” that has not been chosen by any miner to continue with blockchain

  3. When 2 miners solve a block at the same time with 2 different blocks. The network will continue with one of them and the other one (stale block) will be rejected and dropped to mempool

  4. The best practice is to wait for 6 following blocks to make sure that the particular mined block was the one that network has really accepted and continued with.

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#1720
  1. When two miners solve a block at the same time the blockchain splits and the longest chain after that wins and stays.
  2. A stale block is a block that was placed back into the mempool due to its chain not being continued fast enough after a split.
  3. A stale block occurs after a split in the chain returns to one chain and the shorter chained blocks return to mempool.
  4. It is important to wait for 6 confirmed transactions to make sure your block doesn’t become stale.
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#1721

What happens in the bitcoin network when two miners solve a block at the same time?
You then get two different chains going at once.

What is a stale block?
A stale block is when the network finds it was mining two chains, and drops one for the longer (valid) chain.

How do stale blocks occur?
When there was a tie mining two different, but valid blocks.

Why is it important to wait for more than one block to be confirmed when sending or receiving a transaction?
You are waiting for the tie to be settled by future miners who create the longer block and drop the shorter block. Until then, your transaction could be dropped if yours was one included in the dropped chain.

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#1722

1.The longest blockchain will win… The other will be orphanated
2.a block that was produced and not accepted do to a shorter pow.
3. A version of truth that was dropped do to pow
4. To make sure your block gets accepted and not drop

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#1723
  1. 2 versions of the chain is created
  2. a block which was on the chain but was subsequently dropped
  3. when 2 blocks are added to the chain at the same time creating 2 chains and after another block is added to only one of those blocks and as the longest chain “wins” the left over blocked will be dropped from the chain
  4. To be sure your transaction was not in a stale block
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#1724

  1. One block will eventually be dropped and become an orphaned block. This happens when the other block is longer.

  2. A stale block (or orphaned block) is a block that has been dropped because another version of the blockchain is longer.

  3. Stale blocks occur when more than one miner produces a block. The smaller block then becomes the stale block.

  4. It’s important to wait because the block containing your transaction has a chance to become a stale block and put your transaction back into the memepool. Waiting for multiple confirmations to occur will ensure your block is chosen by the network.

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#1725

  1. Both block are valid until another block is published onto one of them, then that longer chain is the blockchain.

  2. A stale block is a block that gets dropped from the blockchain.

  3. Stale blocks occur when two different blocks are mined at similar times that have a different network of nodes running around them so they both are “valid” at first.

  4. So you don’t run the risk of being in a dropped block

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