The example is in here: https://www.blockchain.com/BTC/tx/63910fdfa84db96bd1f28fead4c32f97388d5368c10059d035aac3c5f72fcdc0 Actually, there are two outputs DUP HASH160 PUSHDATA(20)[78ce48f88c94df3762da89dc8498205373a8ce6f] EQUALVERIFY CHECKSIG and RETURN PUSHDATA(36)[aa21a9ed9463ee420b10cbad1d997bfa132a89dc9ba3de04e7233e6e6954f1bc339ebb1a] The strange point is the first output has 12.77303443 BTC, the second is 0 BTC. There […]

I am trying to send a transaction in the cli using electrum with the command ~$ electrum –testnet payto mvYrQck9VfujSanmwvQxiLab3fLuywGdvh 0.01 -f 0.002 Password: (I entered the correct password here) Q { “complete”: true, “final”: […]

I am new to the whole Bitcoin thing, and I am having my first attempt almost going sour. I lost where I created my wallet. I have my Bitcoin address and only 11 of my […]

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 […]