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This tag should be used for questions pertaining to the blockchain. The blockchain is a list of all transactions that have occurred using the Bitcoin currency. It consists of blocks which are linked to each other, and each block consists of transactions. DON'T USE THIS FOR THE SERVICE NAMED 'blockchain.info'!

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Most current such systems (Ethereum, Neo, WAVES, etc.) rely on proof of work to secure the blockchain and issue the native token (ether and waves are issued, Neo was all generated at genesis). The … incentives in these cases are: Transaction fees gained by executing contract transactions Block reward, if it exists There are also a number of private blockchain systems, such as Hyperledger …
answered May 13 '18 by Raghav Sood
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Edit: This is almost certainly a scam - I'm looking at the source right now, and they have replaced the actual Bitcoin seeds with IPs, so it is likely a cloned network that tries to trick you into acc …
answered Dec 12 '18 by Raghav Sood
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Alice creates her digital signature that contains transcation info like id etc. The digital signature only applies to certain inputs and outputs within the transaction, depending on the SIGHASH t …
answered Aug 5 '18 by Raghav Sood
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You can modify it, but in doing so, you will invalidate the signature on the transaction, since the data is no longer the same as what was signed. You could do so on transactions that don't involve s …
answered Aug 13 '18 by Raghav Sood
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My laptop, running an i7-4XXX can hit about 1 millions keys per second using a vanity address generator at its peak. This usually slows down as it heats up, and it is certainly possible to go faster w …
answered Aug 7 '18 by Raghav Sood
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inputs, outputs, and signatures, it is possible to view the history by simply going through the blockchain. …
answered Apr 3 '18 by Raghav Sood
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Bitcoin inputs and outputs are only limited by transaction size. There are scenarios when you may see a few inputs with many outputs, such as an exchange performing many user withdrawals in a single …
answered Aug 5 '18 by Raghav Sood
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The UTXO's script contains either a public key (in P2PK outputs, not really used anymore) or a HASH_160 of the public key or redeem script. Segwit outputs similarly contain a hash of the witness scrip …
answered Jun 2 '18 by Raghav Sood
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Satoshi is simply a denomination, not a different currency. 1 BTC is comprised of 100000000 Satoshi, similarly to how 1 dollar is 100 cents. To convert between them, all you need to do is multiply o …
answered Sep 14 '18 by Raghav Sood
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As far as I know, there is no way to download arbitrary blocks (although I suspect it's not too hard to do if you implement your own client). If you just want blocks for testing, you won't have much …
answered Sep 16 '18 by Raghav Sood
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A child pays for parent (CPFP) transaction is based on the assumption that the child actually spends the output created by the first transaction. In your case, your second transaction does not actual …
answered Jul 2 by Raghav Sood
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Blockchain.com is not a blockchain node, it is an explorer. They have no constraint on following the same rules as a Bitcoin Core node, and can keep orphaned and forked blocks available if they wish …
answered Jul 5 by Raghav Sood
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Each node will usually resolve and reorganize their local chain as soon as they are made aware of a chain with more work. If two blocks are mined at block height N, there is a fork. As soon as a sing …
answered Sep 28 '18 by Raghav Sood
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The first confirmation is simply the fact that your transaction was included in a block. Any confirmations after that are simply new blocks that extend the chain on top of the history that includes th …
answered Jun 10 '18 by Raghav Sood
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they receive a reward for this? There is no reward for this My question is, if the block is invalid and gets sent to the blockchain, why other miners check if said block is valid? They check it … "solved" the block wrong get a reward? If the block is invalid (“wrong”), then it will not be added to the blockchain by any other nodes/miners. So they will not get a reward. For finding a valid block …
answered Aug 5 '18 by Raghav Sood

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