Parses the blockchain about as fast as your IO can pipe it out. For a typical SSD, this can be around ~450 MiB/s.
All memory is allocated up front.
Output goes to stdout, stderr is used for logging.
WARNING: Not actively maintained, use with caution.
A fast blk*.dat parser for bitcoin blockchain analysis.
-j<THREADS>- N threads for parallel computation (default1)-m<BYTES>- memory usage (default209715200bytes, ~200 MiB)-t<INDEX>- transform function (default0, see pre-packaged transforms below)-w<FILENAME>- whitelist file, for omitting blocks from parsing
Important to note is that the implementation skips bitcoind allocated zero-byte gaps, and includes orphan blocks unless -w omits them.
Each of these pre-included functions write their output as raw data (binary, not hex). You can easily write your own though!
0- Outputs the unordered 80-byte block headers1- Outputs every script prefixed with auint16_tlength2- Displays the number of transaction inputs, outputs and number of transactions in the blockchain3- OutputsHEIGHT | VALUEfor each output, typically used for showing output balances over time
Use a whitelist (see -w) to stop orphan blocks from being parsed. (see below for filtering by best chain)
Output all scripts for the local-best blockchain
# parse the local-best blockchain
cat ~/.bitcoin/blocks/blk*.dat | ./parser -t0 | ./bestchain > chain.dat
# output every script found in the local-best blockchain
cat ~/.bitcoin/blocks/blk*.dat | ./parser -j4 -t1 -wchain.dat > ~/.bitcoin/scripts.datThese tools are for the CLI, but will aid in preparing/using data produced by the above.
A best-chain filter for block headers.
Accepts 80-byte block headers until EOF, then finds the best-chain in the set, and outputs the best-chain in the form of a sorted hash map (see HMap<K, V>).
LICENSE MIT
The constants and getOpString function in include/bitcoin-ops.hpp is copied from https://github.com/bitcoin/bitcoin/.