How to check the balance of bitcoin wallets offline?

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eegmak2020-12-24 23:32:31

bitcoin

eegmak, 2020-12-24 23:32:31

It is known that the information is stored in the "database" of bitcoin, which occupies about 60 GB. Advise a library or something like that to be able to check the balance at the address?

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3 answer(s)

Z

zohan1993, 2020-12-25
@zohan1993

1. Buy a VPS, run a bitcoin node, use JSON-RPC
https://developer.bitcoin.org/reference/rpc/
2. Look for free APIs that suit the request limits
https://btc.com/api-doc
https://www.blockchain.com/api/blockchain_api
https://www.coinapi.io/pricing?apikey

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Vasily Bannikov, 2020-12-24
@vabka

which occupies about 60 GB.

It is no longer relevant - now it occupies more than 300GB.
I can’t say about the library, because there is no language specification.
I was able to google this thing: https://github.com/bitcoin-abe/bitcoin-abe
Under C# there is a library https://www.nuget.org/packages/NBitcoin/

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rPman, 2020-12-26
@rPman

Wallet balances are the UTXO base, its size is now about 4 gigabytes
, download the bitcoin-core database, you don’t need to store it all, because you only need chainstate (the --prune 512 key will take about 5GB)
Then you get the entire list with the utility and look for your address there.