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I have created a coin by forking Bitcoin. Now I want to create web wallet for this, but do not know how to create json-rpc apis to communicate with the daemon server. Is there any proper documentation for this?

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Visit API reference (JSON-RPC)

There are several solutions:

  1. You can build bitcoin-cli (which provides json-rpc communication with deamon through command line), and call bash commands on the server. For example, if You run PHP server, You can asynchronously run bash commands.
  2. Also You can use json-rpc libraries on your server - feel free to google for them. For example, if You run PHP server, You can use a library like php-bitcoin-api.
  3. Also, I recommend You to run own blockchain explorer which will help You to communicate with a blockchain of Your coin. For example, try to run bitcoin-abe explorer or any other.

Hope it will be helpful!

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  • bitcoin wallet only allows one user for a single node, i am not getting how to enable my node so that anybody having privete key and address can connect and do transactions through my node.
    – rahul123
    Commented May 15, 2018 at 8:09
  • is there any javascript library like web3 .js for ethereum in bitcoin so that we can do transaction directlly without connecting with any wallet.
    – rahul123
    Commented May 15, 2018 at 8:14
  • In my opinion, the easiest way is to: 1) Use explorer to check balances and to get inputs and outputs of transactions 2) Use bitcoin-js-lib to generate new addresses, to build and sign transactions 3) Use command line on your server to broadcast transactions to the network (bitcoin-cli sendrawtransaction <hex>)
    – 0xuser
    Commented May 15, 2018 at 11:17
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The interface

There is a doc on the JSON-RPC Interface in the Bitcoin Core repository with some important security information.

Individual commands

bitcoin-cli [options] help                List commands
bitcoin-cli [options] help <command>      Get help for a command

This same information is also available at https://bitcoincore.org/en/doc/

These docs were added as part of the Bitcoin Core release process at least in part by this PR: https://github.com/bitcoin/bitcoin/commit/d6189ff20082a2617f843fa9b8e2635f52a3629a

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