used_addr_check (Python)

A tool to efficiently check if a Bitcoin Address has ever been used before

Description

Based on loyce.club's "all bitcoin addresses ever used" list, this library and CLI tool can search the list very, very fast and efficiently.

Features

• Lookup either a single address, or a long list of potential addresses.
• CLI and library options
• Generates a binary search tree index from the text file, and then uses that to search for the address.

Getting Started

This project depends on the large address list being downloaded and extracted.

# Download the zipped text file of used addresses, where each line is a used Bitcoin address.
wget http://alladdresses.loyce.club/all_Bitcoin_addresses_ever_used_sorted.txt.gz

# Extract the file
gunzip -d ./all_Bitcoin_addresses_ever_used_sorted.txt.gz --stdout | pv > all_Bitcoin_addresses_ever_used_sorted.txt

Optionally, if you intend to use the scan_file subcommand, install ripgrep from optimal performance:

# first, install cargo/rust
# then, run:
cargo install ripgrep

Usage - CLI

pip install used_addr_check

# download and extract the required file:
wget http://alladdresses.loyce.club/all_Bitcoin_addresses_ever_used_sorted.txt.gz
gunzip -d ./all_Bitcoin_addresses_ever_used_sorted.txt.gz --stdout | pv > addr_list.txt

# generate the index file (optional):
used_addr_check index -f ./addr_list.txt
# the index file is now at: ./addr_list.index.parquet

# search a couple of addresses:
used_addr_check search -f ./addr_list.txt -s moW9o415jNfgyuzytEMZD84Kovri5DJ64e -s mncqTEYTidNdbqGZnXTd1JFYRrruuh5StV

# search for a long list of addresses (extracted by regex):
used_addr_check scan_file -f ./addr_list.txt -n file_with_addresses_to_lookup.txt

Usage - Library

This example will generate the index file, if required.

from used_addr_check import search_multiple_in_file

needles = [
    'moW9o415jNfgyuzytEMZD84Kovri5DJ64e',
    'mncqTEYTidNdbqGZnXTd1JFYRrruuh5StV'
]
haystack_file_path = './addr_list.txt'

addresses_found_list: List[str] = search_multiple_in_file(
    haystack_file_path=haystack_file_path,
    needles=needled,
)
print(f"{addresses_found_list=}")

Performance Notes

• With the default indexing size of one index entry per 1000 addresses in the "haystack" file, the index is a 140MB Parquet file.
• On a 2023 mid-range laptop with an SSD:
  • Indexing takes 4 minutes.
  • Addresses can be searched at 20 query addresses ("needles") per sec.

There are certainly opportunities for further improvement, but this performance is adequate.

Contributing

Please Star this repo if it's helpful.

Please open GitHub Issues and Pull Requests with features/bugs/fixes.

Future Features

• Optionally disable loguru logging in subfunctions
• Convert "found address" result to an iterator.
• Test cases.