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Topic: Questions for developing application for bitcoin (Read 141 times)
Jessica432
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Questions for developing application for bitcoin
September 26, 2018, 09:24:23 AM
#1
I am new to bitcoin world. I want to set up a local bitcoin full running node and develop my Node JS code talks to node, and provides web api for:
1) Getting balance for any bitcoin address
2) Doing a transfer of bitcoins from any account to any other account. (It may need private key of sender for transfer)
I tried bitcoin core earlier, but seems I can not get balance of any address there.
I will really appreciate any pointers how can I achieve this.
Thanks,
Jessica
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aleksej996
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Re: Questions for developing application for bitcoin
September 26, 2018, 10:32:33 AM
#2
In order to get balance for an address that isn't in your wallet in Bitcoin Core, you need to import it first and do a rescan of the blockchain.
You can use importaddress command for this, which will by default do a rescan automatically once the address is imported, unless specified otherwise in an argument.
Furthermore, when checking the balance of an address with getbalance command, you need to set include_watchonly argument to true, in case you imported an address without importing it's private keys.
Jessica432
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Re: Questions for developing application for bitcoin
September 27, 2018, 12:19:23 AM
#3
Quote from: aleksej996 on September 26, 2018, 10:32:33 AM
In order to get balance for an address that isn't in your wallet in Bitcoin Core, you need to import it first and do a rescan of the blockchain.
Can above be done programmatically? If yes, would it slow down the execution significantly?
NeuroticFish
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Re: Questions for developing application for bitcoin
September 27, 2018, 06:28:57 AM
#4
While researching I've found
this "Bitcoin transaction explorer" code
.
What caught my eyes and may be interesting for this topic was:
Quote
If this explorer is run on top of a node that has an address index such as this one:
https://github.com/btcdrak/bitcoin/tree/addrindex-0.11
then this explorer will be able to look up the
balance
of an address and show every output associated with it.
The problem is that I didn't understand that "address index" part, nor what's at that link. However, it can be a direction...
.
.
HUGE
.
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