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I am working on a app in which my project communicates with the bitcoin server to get the details of a transaction with transaction id as the parameter. I have bitcoind, bitcoin-cli and bitcoin-qt installed on my system. When I run the bitcoin-qt in regtest mode, I am able to create test transactions in which I can send money to an address and get the transaction id for the same. I use this transaction id in my app, I am able to get the transaction details from bitcoin-qt. The problem is, now my testing is limited to only outward transactions wherein I transfer bitcoins to another account. How can I create some test transactions wherein bitcoins are credited to my wallet?

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1 Answer 1

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You probably want to run multiple bitcoind instances in regtest to simulate multiple nodes. Thats pretty easy. You can run a second instance by starting bitcoind with a clean data directory and a different RPC and P2P port.

For that, you could create a 2nd data directory (example: /tmp/datadir2). Create /tmp/datadir2/bitcoin.conf.

Use something similar than:

regtest=1
rpcuser=rt
rpcuser=rt
port=12340
rpcport=10340
discover=0

Now you need to connect your first node with your 2nd node by sending a addnode over the RPC interface.

bitcoin-cli addnode 127.0.0.1:10340 onetry

You can than distinct between both nodes with the -datadir argument while calling bitcoin-cli.

bitcoin-cli -datadir=/tmp/datadir2/ getinfo

Some examples:

generate coins in first node (50 BTC available)

bitcoin-cli generate 101

get address from 2nd node

bitcoin-cli -datadir=/tmp/datadir2/ getnewaddress

send coins to 2nd node

bitcoin-cli sendtoaddress <address> 10.0
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  • Thanks for the reply. I had done the exact same thing and got it running. I was setting the datadir on my host system to a separate directory when starting bitcoin-qt. This was somehow preventing my app from talking with bitcoin-qt.
    – plbit
    Aug 20, 2015 at 9:28
  • After doing the above, when I do getmempoolinfo for the node that receives the transaction, it still shows 0. How do I send the transaction over.
    – thenakulchawla
    Aug 6, 2018 at 18:38
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    Maybe the received funds are not yet confirmed,... call a generate(1) again or try to list unconfirmed balance
    – Jonas Schnelli
    Aug 9, 2018 at 10:39
  • I am trying to use the same above script but its adding the following error to the log 2019-01-10T12:35:51Z Binding RPC on address ::1 port 18443 failed. 2019-01-10T12:35:51Z Binding RPC on address 127.0.0.1 port 18443 failed. 2019-01-10T12:35:51Z Unable to bind any endpoint for RPC server 2019-01-10T12:35:51Z Error: Unable to start HTTP server. See debug log for details. 2019-01-10T12:35:51Z Shutdown: In progress...
    – Pankaj Kumar
    Jan 10, 2019 at 12:37
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    For the record, starting at 0.18 the command generate is deprecated and in 0.19 it will be completely removed. Use generatetoaddress instead.
    – Thalis K.
    Apr 6, 2019 at 18:22

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