When run in daemon mode, bitcoind accepts a parameter -walletnotify=<cmd> which runs <cmd> whenever a wallet transaction changes due to sending/receiving. Is there a similar feature in Electrum? If not, how can it be simulated? […]

weird thing happened to me. I kept backup in cloud under Dropbox/bitcoinz. I can see many mbhd-XXXXXXXXXXXXXXXXXXXXXXXXXXXXXX.zip.aes files, I also have wallet words but when I try to restore old wallet after fresh install on […]

I use the Blockchain.info receive payments API. It’s all working nice and good, but now I have a payment that doesn’t reach my adress. It is unconfirmed for almost 24 hours. Also, the payment doesn’t […]

I am running Bitcoin-qt on my server. I use .Net library to query it through windows services. It all works when I start bitcoin-qt manually. But if the server is restarted, I see that it […]

I am a beginner and just starting to explore the possibilities of Bitcoins. So I would be very grateful if somebody could help me with this question. Is there a risk that my Bitcoins are […]

What metrics can I use as indicators of the health of (a) a full Bitcoin node I am running and (b) the bitcoin network as a whole. Some examples I’ve considered: recency of last block […]

I have been writing a php file intended to create a Bitcoin private key and change it to wallet import format. The issue is when I try a command in a gnome-terminal such as: bitcoin-cli […]

I installed the bitcoind and started it as daemon. After 10hours I’ve tried “du -h” ubuntu@ip-172-31-37-93:~/.Bitcoin$ du -h 16K ./database 59M ./blocks/index 29G ./blocks 646M ./chainstate 30G . How to know if it synced or […]

Is there any Web API available for us to query Blockchain data in hex format? The format should follow the standard (https://en.Bitcoin.it/wiki/Block#Block_structure) structure rather than JSON.

I backed up my private key and restored it into a new copy of Multibit (difference machine). The import was successful but the public key address has not been updated with my previous address. I’ve […]