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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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What is the precedence in terms of generating new addresses? Do wallets generate 10 on the go, then switch them out or do they generate a new one, each time the old one has been used? Also, do they …
asked Jan 16 '18 by Kyle Graham
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I was trying to use the api that is located at: https://api-r.bitcoinchain.com/v1/address/13gWtMQJdg3H6XBpFjMELcHLJc1HHp79vD However, for every address I look up, they seem to be missing some transa …
asked Jan 14 '18 by Kyle Graham
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If I was to search the blockchain for address X, then I see that it has two inputs in a transaction, X and Y. I can safely assume that X and Y are owned by the same person? Now if I look at all of …
asked Jan 12 '18 by Kyle Graham
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One possible answer to this: The API queries the blockchain on a specific node. This node for whatever reason could not be up to date with the blockchain. It could have even stopped synchronising with the blockchain from some date and therefore has outdated information. …
answered Jan 14 '18 by Kyle Graham
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Given the XPub and an address, can I write an algorithm to say whether or not that public key was derived from that XPub and consequently belongs to the same user?
asked Jan 16 '18 by Kyle Graham
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Can I download the blockchain onto a cloud service then build an api to search it? maybe put it on a noSQl database? What would be the best way? Or even better, is there a way to not download the … whole blockchain but, build an api that uses SPV to get just the transactions of a certain public address? I have been trying to use the apis out there such as blockchain, block.io, insightpay, etc …
asked Jan 13 '18 by Kyle Graham
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If two miners picked from the mempool two different sets of transactions, that were not dependent on each other. Then could both miners, mine both blocks and not create a fork? So miner 1 finishes …
asked Mar 20 '18 by Kyle Graham
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I recently looked at this bitcoin transaction: transaction: 3b0e8fae9640e1d043cfef14815c6885e58d71e7ee31cfa53f9c9d5acb138a4d For those who do not want to look at the transaction, I will give a simpl …
asked Jan 16 '18 by Kyle Graham
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most Proof-of-Work, also known as the longest chain or greatest cumulative work chain" If the blockchain was currently: Block1 -> Block2 -> Block3 And two miners pick from the mempool, transactions … that do not overlap. Then this will cause a fork in the blockchain, if both broadcast at the same time. This is because, even though the transaction do not overlap, the blockhash would be different …
answered Mar 20 '18 by Kyle Graham