#bitcoin #blockchain #parser #cryptocurrency #litecoin #block-index #merkle-root

app rusty-blockparser

Blockchain Parser for most common Cryptocurrencies based on Bitcoin

12 releases (7 breaking)

0.11.0 Jul 10, 2023
0.9.0 Apr 17, 2023
0.8.1 Aug 9, 2020
0.8.0 Jul 22, 2020
0.4.0 Jan 29, 2016

#631 in Magic Beans

GPL-3.0 license



rusty-blockparser is a Bitcoin Blockchain Parser written in Rust language.

It allows extraction of various data types (blocks, transactions, scripts, public keys/hashes, balances, ...) and UTXO dumps from Bitcoin based blockchains.

Currently Supported Blockchains:

Bitcoin, Namecoin, Litecoin, Dogecoin, Myriadcoin, Unobtanium and NoteBlockchain.

IMPORANT: It assumes a local unpruned copy of the blockchain with intact block index and blk files, downloaded with Bitcoin Core 0.15.1+ or similar clients. If you are not sure whether your local copy is valid you can apply --verify to validate the chain and block merkle trees. If something doesn't match the parser exits.


Usage: rusty-blockparser [OPTIONS] [COMMAND]

  unspentcsvdump  Dumps the unspent outputs to CSV file
  csvdump         Dumps the whole blockchain into CSV files
  simplestats     Shows various Blockchain stats
  balances        Dumps all addresses with non-zero balance to CSV file
  opreturn        Shows embedded OP_RETURN data that is representable as UTF8
  help            Print this message or the help of the given subcommand(s)

          Verifies merkle roots and block hashes
          Increases verbosity level. Info=0, Debug=1, Trace=2 (default: 0)
  -c, --coin <NAME>
          Specify blockchain coin (default: bitcoin) [possible values: bitcoin, testnet3, namecoin, litecoin, dogecoin, myriadcoin, unobtanium, noteblockchain]
  -d, --blockchain-dir <blockchain-dir>
          Sets blockchain directory which contains blk.dat files (default: ~/.bitcoin/blocks)
  -s, --start <HEIGHT>
          Specify starting block for parsing (inclusive)
  -e, --end <HEIGHT>
          Specify last block for parsing (inclusive) (default: all known blocks)
  -h, --help
          Print help
  -V, --version
          Print version


To make a unspentcsvdump of the Bitcoin blockchain your command would look like this:

# ./blockparser unspentcsvdump /path/to/dump/
[6:02:53] INFO - main: Starting rusty-blockparser v0.7.0 ...
[6:02:53] INFO - index: Reading index from ~/.bitcoin/blocks/index ...
[6:02:54] INFO - index: Got longest chain with 639626 blocks ...
[6:02:54] INFO - blkfile: Reading files from ~/.bitcoin/blocks ...
[6:02:54] INFO - parser: Parsing Bitcoin blockchain (range=0..) ...
[6:02:54] INFO - callback: Using `unspentcsvdump` with dump folder: /path/to/dump ...
[6:03:04] INFO - parser: Status: 130885 Blocks processed. (left: 508741, avg: 13088 blocks/sec)
[10:28:47] INFO - parser: Status: 639163 Blocks processed. (left:    463, avg:    40 blocks/sec)
[10:28:57] INFO - parser: Status: 639311 Blocks processed. (left:    315, avg:    40 blocks/sec)
[10:29:07] INFO - parser: Status: 639452 Blocks processed. (left:    174, avg:    40 blocks/sec)
[10:29:17] INFO - parser: Status: 639596 Blocks processed. (left:     30, avg:    40 blocks/sec)
[10:29:19] INFO - parser: Done. Processed 639626 blocks in 266.43 minutes. (avg:    40 blocks/sec)
[10:32:01] INFO - callback: Done.
Dumped all 639626 blocks:
        -> transactions: 549390991
        -> inputs:       1347165535
        -> outputs:      1359449320
[10:32:01] INFO - main: Fin.


This tool should run on Windows, OS X and Linux. All you need is rust and cargo.

Latest Release

You can download the latest release from crates.io:

cargo install rusty-blockparser

Build from source

git clone https://github.com/gcarq/rusty-blockparser.git
cd rusty-blockparser
cargo build --release
cargo test --release
./target/release/rusty-blockparser --help

It is important to build with --release, otherwise you will get a horrible performance!

Tested on Gentoo Linux with rust-stable 1.44.1

Supported Transaction Types

Bitcoin and Bitcoin Testnet transactions are parsed using rust-bitcoin, this includes transactions of type P2SH, P2PKH, P2PK, P2WSH, P2WPKH, P2TR, OP_RETURN and SegWit.

Bitcoin forks (e.g.: Dogecoin, Litecoin, ...) are evaluated via a custom script implementation which includes P2PK, P2PKH, P2SH and some non-standard transactions.

Memory Usage

The required memory usage depends on the used callback:

  • simplestats: ~100MB
  • csvdump: ~100M
  • unspentcsvdump: ~18GB
  • balances: ~18GB

NOTE: Those values are taken from parsing to block height 639631 (17.07.2020).


Callbacks are built on top of the core parser. They can be implemented to extract specific types of information.

  • balances: dumps all addresses with a non-zero balance. The csv file is in the following format:

    address ; balance
  • unspentcsvdump: dumps all UTXOs along with the address balance. The csv file is in the following format:

    txid ; indexOut ; height ; value ; address

    NOTE: The total size of the csv dump is at least 8 GiB (height 635000).

  • opreturn: shows transactions with embedded OP_RETURN data that is representable as UTF8.

  • csvdump: dumps all parsed data as CSV files into the specified folder. See Usage for an example. I chose CSV dumps instead of an active db-connection because LOAD DATA INFILE is the most performant way for bulk inserts. The files are in the following format:

    block_hash ; height ; version ; blocksize ; hashPrev ; hashMerkleRoot ; nTime ; nBits ; nNonce
    txid ; hashBlock ; version ; lockTime
    txid ; hashPrevOut ; indexPrevOut ; scriptSig ; sequence
    txid ; indexOut ; height ; value ; scriptPubKey ; address

    If unclear what some of these fields are, see the block and transaction specifications. If you want to insert the files into MySql see sql/schema.sql. It contains all table structures and SQL statements for bulk inserting. Also see sql/views.sql for some query examples. NOTE: The total size of the csv dump is at least to 731 GiB (height 635000).

  • simplestats: prints some blockchain statistics like block count, transaction count, avg transactions per block, largest transaction, transaction types etc.

You can also define custom callbacks. A callback gets called at startup, on each block and at the end. See src/callbacks/mod.rs for more information.


Use the issue tracker to report problems, suggestions and questions. You may also contribute by submitting pull requests.

If you find this project helpful, please consider making a donation: 1LFidBTeg5joAqjw35ksebiNkVM8azFM1K

Customizing the tool for your coin

The tool can easily be customized to your coin. This section outlines the changes that need to be made and is for a beginner user (both with Rust and Blockchain). (This guide is made possible by reviewing the commits made by MerlinMagic2018). During this example the coin name used is NoCoinium.

  • The main change is src/blockchain/parser/types.rs.
  • Add a new entry pub struct NoCoinium above the line //pub struct Dash(The case you use here is to be carried in all subsequent references, except when noted)
  • You will then need to add a impl Coin for NoCoinium. You could easily copy a previous block e.g. Bitcoin. The changes you need to do are highlighted below as comments
//The name here should be the same case as defined in the pub struct line
impl Coin for NoCoinium {
    fn name(&self) -> String {
        //This is primarily for display. Use same case as before
    fn magic(&self) -> u32 {
        // Magic bytes are a string of hex characters that prefix messages in the chain. 
        // To find this value, look for the fields pchMessageStart[0-3] in the file chainparams.cpp under CMainParams
        // The value to be used here is 0x + pchMessageStart[3] + pchMessageStart[2] + pchMessageStart[1] + pchMessageStart[0]
        // i.e. string the values in reverse.
    fn version_id(&self) -> u8 {
        // Version ID is used to identify the address prefix for Base58 encoding of the public address
        // Found this using the stackoverflow comment - https://bitcoin.stackexchange.com/questions/62781/litecoin-constants-and-prefixes
        // Again with chainparams.cpp and CMainParams, look for base58Prefixes[PUBKEY_ADDRESS]. Convert the decimal value to Hex and add it here
    fn genesis(&self) -> sha256d::Hash {
        // This is the Genesis Block hash - Get the value from consensus.hashGenesisBlock, again found in chainparams.cpp
    fn default_folder(&self) -> PathBuf {
        // This is the folder from the user's home folder to where the blocks files are found
        // Note the case here. It is not CamelCase as most coin directories are lower case. However, use the actual folder name
        // from your coin implementation.
  • Finally, tie these changes within impl FromStr for CoinType under match coin. The first part will be the case passed as argument to the program (see bullet point below) and the name within from() will be the name used above.
"nocoinium" => Ok(CoinType::from(NoCoinium)),
  • The next change is in src/main.rs. Under the fn parse_args() add your coin to the array of coins. The case you use here will be the same value as you pass in the arguments when executing the blockchain (using the -c argument)
  • Finally, add your coin name in the README.md file so others know your coin is supported


  • Implement Pay2MultiSig script evaluation


~226K SLoC