Currently there are 35 million unspent transaction outputs. Is there a site somewhere where I can query this data to see, for instance, how many UTXO's exist with a value less than 20,000 satoshis? Or the total unique scriptPubKey values found in a UTXOs?
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priestc
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To my knowledge, there is no such site. You could get this with some coding. For example accessing a node's levelDB; see chainstate db keys in the accepted answer of this question. – karask Apr 25 '16 at 08:17
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The standard bitcoind core daemon has no methods to query the UTXO set for reasons I don't know: it should be trivial to give access to it even on a pruned node since it needs to have the full UTXO set at any time to validate a new block.
Anyway a pull request seems in progress to add this capability: https://github.com/bitcoin/bitcoin/pull/8952
There are anyway third party apis to query a single address, for example https://www.blockcypher.com/dev/ or https://chain.so/api
Alessandro Polverini
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The pull request you refer to improves the
listunspentRPC, which queries the wallet. It does not give you access to the network-side UTXO set. The does exist agettxoutRPC, however. – Pieter Wuille Apr 17 '17 at 07:43 -
Thanks, I misinterpreted. Anyway I'm still at a loss in understanding why there is no way to query the UTXO. A simple command to check if tx/index is in the UTXO would be a great start, for example. – Alessandro Polverini Apr 17 '17 at 16:33
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No, I haven't find any method to list all the UTXO: you already have to know it to query one out of a tx. – Alessandro Polverini Jun 27 '17 at 09:28