Homework on Stale Blocks

Blockchain and Bitcoin 101
#3834

  1. the block needs to propagate throughout the network across the globe. If 2 miners both solve a block, the longest chain of blocks (with the highest proof of work) will be accepted by the network and the other block rejected (known as an orphaned or stale block).

  2. a stale block is a confirmed block that has been rejected from the network.

  3. Stale blocks occur when 2 or more confirmed blocks are appended to the network, but only one version of the truth can be accepted and thus the network drops those blocks with the least amount of POW or chain length.

  4. It is important to wait for more than one block to be confirmed when sending and receiving a transaction. as you want to make sure that your block has been fully accepted by the network and did not by coincidence and less POW get rejected ie dropped by the network. To verify this wait at least 6 blocks to be sure.

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#3835

1.A block which has longer chain wins and the other block would be dropped.
2.A stale block is a block which is discarded because the other block with longer chain is accepted.
3.When 2 miners solve the problem at the same time, only one block with longer chain can win.The other block will be stale block.
4.in order to ensure the transaction which is in the right chain.

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#3836
  1. When two miners solve a block at the same time, the chain will temporarily be split into 2 forks. Nodes will temporality receive two different versions of truth.
  2. A stale block is the one creating shorter chain and eventually being dropped.
  3. Stale block occur when the block creating longer chain being accepted by the network and the other one being dropped out of the chain.
  4. Because the transaction will be sent back to mempool if the block it belongs to being dropped.
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#3837

  1. What happens in the bitcoin network when two miners solve a block at the same time? We get 2 verions of the truth. The longest Blockchain always wins.

  2. What is a stale block? Stale Blocks are the blocks that are not accepted into the blockchain. Because they were overridden by a longer chain.

  3. How do stale blocks occur? It occurs when you have 2 diffrent truths at the same time. The shortest block gets dropped from the blockchain

  4. Why is it important to wait for more than one block to be confirmed when sending or receiving a transaction? By having several conformations you are more sure that your transaction is not the stale block. You cant have 2 diffrent versions of truths. Always wait for 6 confirmations

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#3838
  1. When two miners solve a block at the same time it turns into two different chains and the blockchain will choose whichever one was longest
  2. A stale block is a block that goes back to the mempool because it wasn’t as recognized by its peers
  3. They occur when 2 miners mine valid blocks at the same time
  4. This way there wont be two chains there will just be the chain that reaches the 6 blocks first
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#3839

When 2 miners solve a block at the same time the block in the longest chain wins and the other block is discarded and considered a stale or orphaned block. All the transactions are returned to the mempool.

A stale block is the block that was in the blockchain but then dropped because another block that was produced at the same time was part of a longer chain.

Stale blocks occur when a block was valid for a while because 2 were produced with the same version of the truth but then dropped because the blockchain continued on another block.

It is important to wait for 6 confirmations to be sure that the block your transactions are in is not dropped from the chain.

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#3840
  1. What happens in the bitcoin network when two miners solve a block at the same time?
    The chain splits into two chains. The longest chain will win, the transactions of the other chain will be dumped into the mempool.
  2. What is a stale block?
    The block of the shortest chain after a fork, which will be moved to the mempool
  3. How do stale blocks occur?
    After a fork. Its the block with the shorthest chain.
  4. Why is it important to wait for more than one block to be confirmed when sending or receiving a transaction?
    How more confirmation how better. Someone could maybe double spend his utxo.
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#3841

  1. What happens in the bitcoin network when two miners solve a block at the same time?
    a fork occurs on the block chain.

  2. What is a stale block?
    A stale block is the block in the fork that is discarded because the other block in the fork becomes longer.

  3. How do stale blocks occur?
    a stale block occurs when a block in a fork has to be discarded because, even though both blocks are correct, the stale block has become shorter than the other block in the fork.

  4. Why is it important to wait for more than one block to be confirmed when sending or receiving a transaction?
    so that you know that your transaction hasn’t been dropped from the chain and returned to the mempool.

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#3842

  1. Both blocks are added with some one on some nodes and the other on different nodes.

  2. A stale block is a block that was added to the chain but did not have further blocks added or has fewer block added than another block that forked in the network.

3.Stale blocks occur when more than one miner adds a block to the chain at the same exact time.

  1. It is important that at least 6 blocks are confirmed before ensure a transactions completion because the block including the transaction could end up a stale block and invalidated from the chain.
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#3843
  1. What happens in the bitcoin network when two miners solve a block at the same time?
    2 blocks get propogated, each to the closest-to-each-miners nodes first. Subsequently, other miners could append their blocks to both new blockchains but eventually the network will chose the longest blockchain, where long refers to the difficulty level, meaning the chain with the highest level of difficulty will remain.
  2. What is a stale block?
    It´s a block that get “unblocked” and the TXs will go back to the mempool. The case is the one described above
  3. How do stale blocks occur?
    when two miners solve a block at the same time and temporarily 2 blockchains are created. The blockchain to be reversed contains those STALE blocks.
  4. Why is it important to wait for more than one block to be confirmed when sending or receiving a transaction?
    To avoid get a false confirmation in the case of STALE block. Best practices require 6 confirmation to be sure the TX is finally accepted
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#3844

  1. When two miners solve a block at the same time, the next block minted will be based upon one of the two, and whichever is solved first will become the next legitimate part of the blockchain

  2. Stale blocks are solved blocks which are not utilized by the protocol

  3. Stale blocks occur because there may be multiple blocks which have solved the nonce riddle, but only one can be used.

  4. It is important to wait for multiple confirmations incase the block that you were confirmed on ends up being a stale block and returned to the mempool.

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#3845
  1. the chain splits into two. However, the chain with more blocks wins (proof of work).
  2. Stale block is the shortest chain after splitting.
  3. Stale blocks occur when split happens and it is the shortest chain after splitting.
  4. So there doesn’t happen stale block, and the recommended length is 6 proofs.
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#3846

  1. What happens in the bitcoin network when two miners solve a block at the same time?
    One part of the network has it’s truth with block A, the other part has also it’s truth with block B. This situation is resolved with the next miner as he appends his block C to either:
    a) BC with A
    or
    b) BC with B
    One of those BC will be the longest and that is chosen by the network as the final truth.

  2. What is a stale block?
    A block that has been added to the BC but then dropped back to the mempool due to the situation described above.

  3. How do stale blocks occur?
    It is not chosen by the network because a longer BC has been propagated so this block is dropped back to the mempool

  4. Why is it important to wait for more than one block to be confirmed when sending or receiving a transaction?
    Because the transaction can be still dropped. Best practise is to wait for 6 confirmations

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#3847

  1. What happens in the bitcoin network when two miners solve a block at the same time?
    Two competing chains will exist of which one only will win at the moment a new block is made for one of the two chains is made and propagated through the network. Longest chain wins.

  2. What is a stale block?
    A block that is discarded by the network

  3. How do stale blocks occur?
    These can occur when two parallel chains are existing in the same network and when the network decides to discard one of these chains with corresponding blocks.

  4. Why is it important to wait for more than one block to be confirmed when sending or receiving a transaction?
    Because a transaction might only exist in one block with a chance of becoming a stale block and not processed by the network.

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#3848

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

When two miners in the bitcoin network solve a block at the same time, two versions of truth are created and a fork in the block results (the nodes closest to the first miner attempts to program will get his block and the nodes closest to the other miner will also be propagating their block in the same fashion; each unbeknownst to the other, thereby a creating a fork).

2. What is a stale block?

A stale block is when a hash chain is unused or dropped.

3. How do stale blocks occur?
Stale blocks were on the blockchain at one time but were simply dropped because it took them longer to solve the puzzle or there is another version in the blockchain that is simply longer without those blocks in it.

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

It is important to wait for more than one block to be confirmed when sending or receiving a transaction because it ensures that the issues with stale/orphan blocks are minimized and the blockchain links confirmed.

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#3849

  1. What happens in the bitcoin network when two miners solve a block at the same time?
    The network forks the chain and confirms the longer one and drops the shorter one.

  2. What is a stale block?
    A stale block is a dropped block from the blockchain and put back into the mempool.

  3. How do stale blocks occur?
    Stale blocks occur when 2 miners solve a block at the same time but then one of their blocks gets dropped due to their block not being carried on to the blockchain.

  4. Why is it important to wait for more than one block to be confirmed when sending or receiving a transaction?
    To minimize the risk of a Stale block.

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#3850

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

They simultaneously start to propagate their version of block across the network to all nods as they are not aware of the other block or still want to compete with each other. So now we have 2 versions of tj blockchain, both valid both good nonce both good transactions and we will not know u till further which one will survive.

What is a stale block?

It is a version of the block that was dropped and its content all transactions come to mempool

How do stale blocks occur?

So 2 versions of the blockchain starts to occur. The miners start receiving the version of the block they mine new blocks and the leg that will have at one Pont more prove of work and will be for this reason longest will be accepted and the other dropped

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

For the reason explained above. Its recommended that we wait for 6 confirmations to make sure that the block our transaction is in has not dropped becoming the stale block with our transaction landing back in mempool

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#3851

What happens in the bitcoin network when two miners solve a block at the same time?
When this happens both blocks are propagated throughout the nodes and two versions of the chain will exist until miners add blocks to one chain making it longer. The longest and most difficult block is chosen to continue the chain, the other block becomes a stale block and transactions are returned to the mempool.
What is a stale block?
A stale block is a block that was part of the chain at some point but was dropped because another longer block was accepted as the truth and thus all TXs in that stale blocked are returned to the mempool.
How to stale blocks occur?
Stale blocks occur when two miners solve blocks at the same time but only one can be accepted to continue the blockchain.
Why is it important to wait for more than one block to be confirmed when sending or receiving a transaction?
Because there’s a chance that your transaction is in a block that could become a stale block.

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#3852
  1. there are two parallel blockchains that only differ by the last block.
  2. a stale block is a block that was temporarilly included in the blockchain but then got removed to mempool
  3. when two blocks get added at the same time, there are 2 blockchains coexisting. Once one of these receives another block, it “wins” and all the txs of the last block of the other blockchain need to return to mempool
  4. because you only can be sure that your transaction is not part of an orphan block when there are several blocks and therefore confirmations afterwards.
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#3853
  1. shortest block is staled and longest chain of blocks wins
  2. stale block is 2 legitimate blocked confirmed via different nodes based on distance
  3. when multiple miners guess the nonce at very similar time
  4. to drop and remove any stale blocks lurking in the network.
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