Posts Tagged ‘python

Bismuth (BIS) is apparently the first Python blockchain based around modularity and efficiency with ready-made decentralized applications. It is a project that has been available since 2017, but is not yet very popular with a sum 1 million USD market capitalization and a very low trading volume at the moment, so it might be worth digging a bit more about it. BIS uses a custom Proof-of-Work algorithm plus HyperNodes (PoS implementation), so it ban bi mined using GPUs and you can also stake coins that you have mined as well. The mining reward is dropping however and is scheduled to drop to 0 at block 7,100,000 (there is still time before that happens) and then it will become PoS only.

There are a few exchanges trading BIS, though thy are mostly smaller ones and a number of mining pools available. Do note that there is a GPU miner available for both AMD and Nvidia, with performance apparently scalling well from lower-end to higher-end GPUs. Every pool however uses its own dedicated miner, so you need to firs select a pool and then download the miner they have available. You can check out BIS Pool, EggPool and Noncepool if you are interested in mining. Nvidia miners will probably be more interested, especially with higher-end GPUs like the GTX 1080 Ti than AMD owners of RX 480/580.

If you are interested in checking out the Bismuth (BIS) Python-based crypto project…

From time to time people tend to remember that they have minded BTC, LTC, DOGE or another of the earlier cryptocoins back in the day when they suddenly find an old wallet.dat file and then the problem with recovering the private keys and the coins in the wallet arises, we often get questions on how to do that. The easiest way would of course be to just copy the wallet.dat file in a new installation of Bitcoin Core or the respective local wallet and wait for the blockchain to sync in order to have access to any coins stored in the wallet. Int he case of Bitcoin however this is a slow process requiring you to download 150 GB of data (the whole blockchain), so alternative ways are being looked into and there are some that can be easier. One such way is to use the PyWallet Bitcoin wallet importer/exporter Python script that has been available for ages and that works great for giving you all your public and private keys from a wallet.dat file.

PyWallet however is a Python script that does require you to have Python installed and it requires an older version 2.7, so it will not work with the latest 3.x releases as there are changes that will prevent you from running the script. We are going to go through a short guide on how you can export your public/private keys from a wallet.dat under Windows here, the procedure for Linux is very similar as well. So you need to download and install Python 2.7 first, this is a Windows package of Python, there are no other dependencies to run the script under Windows. Then you need to install it in an easy folder like C:\Python27 for example, copy the script and the wallet.dat files in the same folder and then run the following command:

python --dumpwallet --datadir=.

If you have used the wallet for mining you may have more than just a few addresses inside, so you can use the below code to save the output into a wallet.txt file for easy use instead of just outputting it in the console window:

python --dumpwallet --datadir=. > wallet.txt

Just open up the text file and you will see a list of exported public keys (addresses) and private keys that were inside the wallet.dat wallet file. If you had the wallet encrypted you will also need to provide the password you used fr the encryption in order fro the data to be decrypted first. If you do not remember that password you have used to encrypt the wallet.dat file, well that would be a serious problem as recovering any coins inside the wallet has just become much harder that you though it could be.

You can use any block explorer for the respective coin to check if it has any balance inside by pasting your address (public key), so that you can be sure if there are coins or not in an address. If there are you can then just import the public/private key in a new wallet and then do whatever you want with the coins inside. Importing the key pair can vary depending on the wallet you choose to use, so check what is the procedure and make sure that you can import a wallet using the public and private key(s) you have just obtained using the PyWallet script.

There is also a more up to date fork of PyWallet available as well that offers some useful additional features, so you may also check it out if the original one does not do what you want it to, although the original one is perfectly fine for recovering the keys.