Blockchain-downloader

Downloads information from the blockchain.

This code has been modified from several sources and is free to use.

Code used is modified versions of jean.py to download data from blockchain.info as well as the satoshi downloader script.

Instructions

Install Python 2 or 3 and pip
- Windows: https://github.com/BurntSushi/nfldb/wiki/Python-&-pip-Windows-installation
- Linux: $ sudo apt-get install python-pip
During install when it asks for what modules to install, ensure that the last option "install to PATH" is enabled.
After installing, run Command Prompt/Terminal
Change directory to where the file is saved (cd /path/to/folder)
Install the requirements with pip
- pip install -r requirements.txt
Run the command: python blockchain_downloader.py [TRANSACTION_ID] [OUTPUT_FILENAME]
- TRANSACTION_ID is optional (don't include the [] brackets). It will ask for one upon start if one isn't supplied.
- OUTPUT_FILENAME is optional (don't include the [] brackets). The default output filename is 'file'.
If you have the bitcoin RPC service setup with a local blockchain, add it to the rpclogin.txt file. -username in the first line and password in the second line.
enable RPC by adding bitcoin.conf to the folder with the blocks folder Appdata on windows default
- https://github.com/bitcoin/bitcoin/blob/master/contrib/debian/examples/bitcoin.conf
- Add txindex=1
- enable rpcport=8332
- change rpcuser and rpcpass to match rpclogin.txt
- Add server=1

Run this tool inside Terminal, navigate to the download folder (cd)
Run with "python blockchain_downloader.py " is the traditional usage
or Run with "python blockchain-downloader.py " for block ranges (note: that is index height)
inside dlfn.py under get_data_local() are self.save_file() functions used to save various versions of information:
- You may have to remove the "# " before these functions to download the data
- indata is the input script data
- inhex is the input data as hex
- hexdata is the output data as hex
- data is the output data following the satoshi length + checksum
- origdata is the original unmodified output data