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getting balance of xpub key using bitcoind
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Topic: getting balance of xpub key using bitcoind (Read 1973 times)
btc_enigma
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getting balance of xpub key using bitcoind
July 31, 2015, 09:59:59 AM
Last edit: July 31, 2015, 10:21:54 AM by btc_enigma
#1
I want to know how
https://blockchain.info/xpub/xpub6CUGRUonZSQ4TWtTMmzXdrXDtypWKiKrhko4egpiMZbpiaQL2jkwSB1icqYh2cfDfVxdx4df189oLKnC5fSwqPfgyP3hooxujYzAu3fDVmz
works ?
How does it calculate the balance from utxo ? Does it match each address in utxo to check if it is a child of given xpub key (I don't think so), or it always computes say 10 child addresses and shows their balance.
Sorry, couldn't find answer in other places. Feel free to point me it post if its already answered.
Blockonomics - Decentralized and permissionless payment solution
Muhammed Zakir
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Re: getting balance of xpub key using bitcoind
July 31, 2015, 11:01:54 AM
#2
AFAIK it derives tree and scan external chain addresses to see transactions.
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btc_enigma
(OP)
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Re: getting balance of xpub key using bitcoind
July 31, 2015, 11:06:22 AM
#3
Quote from: Muhammed Zakir on July 31, 2015, 11:01:54 AM
AFAIK it derives tree and scan external chain addresses to see transactions.
Do you know how far does it derive the tree(depth and breath) ?
Blockonomics - Decentralized and permissionless payment solution
Muhammed Zakir
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Re: getting balance of xpub key using bitcoind
July 31, 2015, 11:53:44 AM
#4
Quote from: btc_enigma on July 31, 2015, 11:06:22 AM
Quote from: Muhammed Zakir on July 31, 2015, 11:01:54 AM
AFAIK it derives tree and scan external chain addresses to see transactions.
Do you know how far does it derive the tree(depth and breath) ?
It stops searching until "X" number of consecutive unused addresses is found, where X is gap limit. By default, gap limit is 20 but it depends on wallet software. I think you can also go with 20 as gap limit.
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ChipMixer
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{
MIXING
REINVENTED
FOR YOUR
PRIVACY
#
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ChipMixer
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btc_enigma
(OP)
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Re: getting balance of xpub key using bitcoind
August 01, 2015, 07:11:22 AM
Last edit: August 01, 2015, 07:21:52 AM by btc_enigma
#5
Quote from: Muhammed Zakir on July 31, 2015, 11:53:44 AM
Quote from: btc_enigma on July 31, 2015, 11:06:22 AM
Quote from: Muhammed Zakir on July 31, 2015, 11:01:54 AM
AFAIK it derives tree and scan external chain addresses to see transactions.
Do you know how far does it derive the tree(depth and breath) ?
It stops searching until "X" number of consecutive unused addresses is found, where X is gap limit. By default, gap limit is 20 but it depends on wallet software. I think you can also go with 20 as gap limit.
Thanks MZ, now I had a look at Account discovery in
https://github.com/bitcoin/bips/blob/master/bip-0044.mediawiki
and it seems to match what you described. Also had a look at
HD wallets
I see wallets using m/44'/0'/0'/c/i , and also m/0/0'/a'/c/i . I would assume
https://blockchain.info/xpub/xpub6CUGRUonZSQ4TWtTMmzXdrXDtypWKiKrhko4egpiMZbpiaQL2jkwSB1icqYh2cfDfVxdx4df189oLKnC5fSwqPfgyP3hooxujYzAu3fDVmz
is searching using m/c/i .
I think its easiest for blockonomics to ask user to enter wallet name so that we use the appropriate path to import addresses.
Blockonomics - Decentralized and permissionless payment solution
Muhammed Zakir
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I prefer Zakir over Muhammed when mentioning me!
Re: getting balance of xpub key using bitcoind
August 01, 2015, 12:03:27 PM
#6
Quote from: btc_enigma on August 01, 2015, 07:11:22 AM
-snip-
I think its easiest for blockonomics to ask user to enter wallet name so that we use the appropriate path to import addresses.
That is a good idea. Feel free to ask if you have any doubt/problem. Good luck!
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ChipMixer
.
{
MIXING
REINVENTED
FOR YOUR
PRIVACY
#
.
ChipMixer
.
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btc_enigma
(OP)
Hero Member
Offline
Activity: 688
Merit: 567
Re: getting balance of xpub key using bitcoind
August 11, 2015, 04:56:54 AM
#7
HI MZ,
Would it possible for you to help us test xpub search in blockonomics, find details here
https://bitcointalk.org/index.php?topic=880995.msg12105873#msg12105873
Thanks
Blockonomics - Decentralized and permissionless payment solution
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