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The blockchain forks momentarily, in which case, after a 10 minute period, whichever fork is longer(aka more confirmed blocks/POW/electricity spent) will be absorbed into the updated blockchain
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A stale block is a block that is rejected from the blockchain in favor of a longer fork of blocks
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Stale blocks occur when two blocks are created/confirmed at the same time
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It is best practice to wait to submit a block until there are 6 blocks following it to decrease the chances of you losing a stale block.
What happens in the bitcoin network when two miners solve a block at the same time?
Depending on where the next block is attached, the network will accept the longest version of the blockchain and the other block will be put back in the mempool.
What is a stale block?
A stale block is a block that was part of the blockchain but has been dropped because another version that was longer is adopted by the network.
How do stale blocks occur?
When a longer version is accepted by the network, the block on the smaller chain will be dropped and becomes a stale block.
Why is it important to wait for more than one block to be confirmed when sending or receiving a transaction?
There is a possibility that the transaction will be part of stale block and be send back to the mempool.
- In the bitcoin network when two miners solve a at the same time some nodes will accept one version of the truth while other nodes will accept the other. Over time within 10 mins the nodes will accept the version of truth with more proof of work. The other miners blocks which were not accepted became stale or orphaned blocks and are returned back to the mempool.
- A stale block is a valid block that was not confirmed to the blockchain.
- Stale blocks occur when a valid block is not confirmed and added to the block chain within 10 minutes.
- It is important to wait for more than one confirmation when sending and receiving because within 10 mins the block could become stale or dropped from the chain. It is important to wait and see if other nodes will pick up your block and verify it to the blockchain
- They 'âwaitâ for confirmation whose block is accepted as first. The second block will be rejected and all TX from it go back to mempool.
- It is the rejected block described above.
- When more then one miner produce nonce solution in the same time.
- To avoid a mess. Situations when TX was confirmed but soon rejected (when confirmed TX canât be rejected already confirmed) because the block when this TX was became an orphan block.
- One of the blocks will become orphaned or stale; whichever is shortest.
- A block that is dropped from the blockchain.
- A stale block occurs when two miners solve the puzzle at the same time, and some nodes recognize it but others do not.
- To ensure that the transaction is confirmed and it is not returned back to the mempool.
- What happens in the bitcoin network when two miners solve a block at the same time?
Then two valid blocks are attached to the blockchain in parallel, until another miner is mining a subsequent block based on one of the two parallel blocks. This is then the longest blockchain and therefore valid. - What is a stale block?
This is that one of the two parallel blocks to which no new block was attached. The transactions of this block got back to the mempool. - How do stale blocks occur?
They occur by having been mined at the same time as another block, but being left in the shorter chain. - Why is it important to wait for more than one block to be confirmed when sending or receiving a transaction?
To make sure that this transaction does not end up in a stale block and sent back to the mempool.
- When two miners solve a block at the same time, the next block will determine which block of the two will make a longer chain. Once the chain is longer for one block, the second block will be removed and the transactions within that block will returned to the mempool.
- A stale block is a block that is removed from the blockchain.
- A stale block occurs when two miners create two separate valid blocks and one of those blocks is not part of a longer chain within the blockchain.
- Your transaction might be in a block that needs to be removed because it is not part of a longer chain within the blockchain.
- Firstly they will propagate the blocks throughout the network, and miners in different part of the world will add the block they receive first to their version of the blockchain, meaning that it for a certain period of time exists different versions of the blockchain. This is solved by continuing the race with the following block, where the winner of the longest chain will leave the other block as an orphaned block
- A stale block is the block that looses the race, and have to reverse his block and use the other version of the blockchain
- Stale blocks occur when a valid PoW to two different blocks are found at approximately the same time
- Since it is possible that the block containing your transaction may be reversed in a situation with a naturally occurring fork. Its best practice to wait 6 confirmations to ensure your transaction can not be reversed
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What happens in the bitcoin network when two miners solve a block at the same time?
Both are valid and transmitted to the network -
What is a stale block?
A previously valid block that is dropped from the blockchain when a competing equally valid blockchain is longer and has propagated through the network -
How do stale blocks occur?
When two blocks are mined simultaneously and added at the same time to the blockchain, but one chain continues to get appended, the other previously valid block is dropped, -
Why is it important to wait for more than one block to be confirmed when sending or receiving a transaction?
To allow time for propagation through the network and thus minimize the occurrence of stale blocks.
1,another chain is created until one wins in length the shortest chain gets dumped
2, the block that got dumped from the shortest chain
3,when miners create a block at the same time causing a fork,the shortest chain will get dropped and that block becomes a staleblock
4,to validate the transaction incase a stale block occurs
- What happens in the bitcoin network when two miners solve a block at the same time?
Both of them will try to append their block to the blockchain ,some of the Nodes will pick one of the blocks and the other Nodes could pick up the other block. Because each Node take the closest block they see but in the end the Network will choose and validate just one of the blocks.The one in the longest chain. The other one will be rejected and all tx will go back to the Mempool. - What is a stale block?
A rejected block by the Network
3 How do stale blocks occur?
When 2 or more miners are trying to append their block at the same time the Network can propagate and process just one of them - Why is it important to wait for more than one block to be confirmed when sending or receiving a transaction?
To be sure itâs always better to wait for another 6 blocks after that block to have a clear confirmation that the Network accepted the block.
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Homework - Stale blocks
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What happens in the bitcoin network when two miners solve a block at the same time?
The block with the most proof of work will be accepted and the other one will be dropped. If there are multiple chains competing on the network, each one is referred to as a different version of truth. The version of truth that can get blocks appended to it quicker, thereby becoming longer, serves as the current best blockchain for Bitcoin. -
What is a stale block?
Orphan blocks, sometimes referred to as stale blocks, are blocks that are not accepted into the blockchain network due to a time lag in the reporting of the block in question to the network of miners, as compared to a qualifying block. -
How do stale blocks occur?
A block which was successfully mined but not included on the current longest blockchain, usually because another block at the same height was added to the chain first. -
Why is it important to wait for more than one block to be confirmed when sending or receiving a transaction?
Bitcoin clients always trust the longest chain, so if two blocks is mined on the same time, itâs up to (51% of) the miners to decide which is going to be âacceptedâ and which is going to be worthless.This is one of the reasons why you shouldnât trust only a few confirms, as the confirms could be a orphaned blockchain. After âenoughâ confirms, everyone will mine on the âcorrectâ blockchain, because any work(mining) on a orphaned blockchain is waste of power (unless your trying to perform a 51% attack).
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What happens in the bitcoin network when two miners solve a block at the same time?
Two versions of the blockchain will exist until one of them gets longer than the other. -
What is a stale block?
A valid block that gets dropped from the blockchain. -
How do stale blocks occur?
Another version of the chain gets longer and accepted as the new truth. -
Why is it important to wait for more than one block to be confirmed when sending or receiving a transaction?
Because the block that the transaction is in might get orphaned.
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When two miners solve a block at the same time, different nodes receive it. One miner make work on one of the blocks and another one make work on the other block and once someone solves it first the other block gets dropped.
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A stale block is a block that gets dropped from the chain.
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Stale blocks occur when the solve time is less then 10 minutes because people are getting different information at different times causing miners to see different things and solve different transactions. This causes the ones not being used to be be dropped.
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It is important to make sure your transaction doesnât get dropped from the chain.
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Each miner will pick the nodes closest to them so that they can propagate their blocks in the network. One side of the network of nodes will believe that the current block added to the blockchain would be miner 1âs block. Whilst the other side will believe itâs miner 2âs block that is added to the blockchain. Thus, this causes confusion within the network unless a 3rd miner is involved and supports one of the miners, as this will enable the network to make an informed decision as to which minerâs block will be removed from the blockchain.
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Itâs a minerâs block that is valid but has been removed from the blockchain and the transactions list within this block is sent to the mempool. This is because it wasnât part of the longest chain.
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By having 2 minerâs producing a block at the same time and one of them being dropped and discarded (despite being valid), resulting in the blockchain carrying on the other block.
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Must wait for 6 confirmations before confirming a block since there could be a case whereby your block full of transactions may be dropped.
1 - you get 2 versions of the blockchain. Eventually 1 version will be longer than the other (as more blocks are added) and that version will be chosen as the confirmed and validated blockchain accepted by all nodes.
2 - a block that has been dropped by the network
3 - stale bock occurs when there is another blockchain that is longer that is accepted by all nodes before the blockchain containing the stale block.
4 - because the transaction could end up in an orphaned block and return to the mempool. By waiting you can be sure your transaction is in a stable block.
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One attaches to the blockchain and the other is rejected/orphaned with its transactions sent back to the mempool.
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A stale/orphaned block is a block that has been successfully mined, however it lost its chance to permanently attach to the block chain due to a more successful competitor with a longer chain.
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Stale blocks occur when more than one block is mined at the same time and accepted to a number of nodes but before receiving enough confirmations within the 10 minute block creating window.
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Because you should wait for 6 confirmations to ensure your transaction isnât within a block whose transactions are sent back to the mempool due to a longer competing chain.
One block will be dropped back into the mempool and the other block will be validated. The chain splits into two possible ends with only the longest chain achieving validation.
The name given to a block that is dropped back into the mempool after a fork.
When there is a fork in the chain and the other contending block has a longer chain.
To avoid the occurrence of a stale block or an orphan block the accepted number of confirmed blocks is 6 which helps to verify the correct version of truth.
- What happens in the bitcoin network when two miners solve a block at the same time?
The longest blockchain in which at least six additional new blocks continue to add to the block by future miners will be confirmed and the other block will be staled and transactions associated with it get added back to the Mempool. This happens when two separate miner blocks are sent at the same time and due to different location of the nodes.
- What is a stale block?
A stale block is a valid block which had been discarded for not being in the longest chain.
- How do stale blocks occur?
When 2 miners solve a block at the same time. The chain now has two valid blocks, as soon as one block is becoming longer, the other one will be dropped.
- 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 at least 6 confirmation in case of a stale block occurring.
- This will create two blockchains with a different last block. Once few more blocks have been mined the longest blockchain will be accepted by all the nodes and the other one will be dropped.
- A stale block is a block dropped of the blockchain which dropped out as it is not the final, longest blockchain.
- When two different miners mine a block at the same time, one continues in the actual blockchain (the longest) and the other one is dropped. The dropped one has blocks that are not valid anymore which are then dropped - these are stale blocks.
- In case other blocks have been created.