This already summaries the issue I’m currently trying to figure out to calculate the transaction fee to prevent negative balance. (testnet) I tried using createrawtransaction answered. When I tried to send all balance to an […]

I’ve created a crypto-currency wallet for Bitcoin using BitcoinJ. Now I want to add Litecoin in this wallet. How to implement BitcoinJ dependency for Litecoin? While using BitcoinJ for both Litecoin and Bitcoin, I was […]

I followed the tutorial https://medium.com/@meeDamian/c-lightning-node-on-rbp3-b950660fb835 without error. When I type: sudo systemctl start lightningd I get Failed to start lightningd.service: Unit bitcoind.service not found. Note: Blockchain syncronization is not finished Any idea? thank you

Lets say that I execute the code below when the user accesses the deposit page. my_private_key = random_key() my_public_key = privtopub(my_private_key) my_address = pubtoaddr(my_public_key) And I let the user deposit into my_address. How would I […]

Trying to create a Bitcoin based webapp in python which takes BTC deposits (New to Bitcoin in general, but want to get involved). Although I would preferably want to use a different address for each […]

Is there any Javascript code out there or examples on how to sign a transaction by using the extended-private-key? What I am essentially looking for is code that will help derive the private key, that […]

I am trying to configure the Bitcoin core build , as I use make , I received the following issue . ~/Desktop/bitcoin$ make Making all in src make[1]: Entering directory ‘/home/fu/Desktop/bitcoin/src’ make all-recursive make[2]: Entering […]

Trying to run the Main file of the wallet template from bitcoinj but JavaFX not found. When I run the main file of the wallettemplate I get multiple errors of javafx packages not found. When […]

I am a newbie to Bitcoin. Looking at curl https://blockchain.info/unspent?active=1Cdid9KFAaatwczBwBttQcwXYCpvK8h7FK I guess that the script is the owner’s address.I am not sure about this. “unspent_outputs”:[ { “tx_hash”:”f2c245c38672a5d8fba5a5caa44dcef277a52e916a0603272f91286f2b052706″, “tx_hash_big_endian”:”0627052b6f28912f2703066a912ea577f2ce4da4caa5a5fbd8a57286c345c2f2″, “tx_index”:47854970, “tx_output_n”: 1, “script”:”76a9147f9b1a7fb68d60c536c2fd8aeaa53a8f3cc025a888ac”, “value”: 8450000, “value_hex”: […]

Using OpenSSL ver 1.1.0h on win 8.1 – 32 bit Im trying to recreate this post using cmd: OpenSSL generate Bitcoin address But on step 3: openssl ec -in c:keysprivate.pem -outform DER|tail -c +8|head -c […]