shikita/bitcoin-iterate

Simple fast iterator to extract data from bitcoind's blockchain files.

This is some fast code to iterate over bitcoind's block files to extract blockchain data from the main blockchain.

To build:

1. make

Things you can do:

Show block hash and transaction size for each transaction in the main chain:

./bitcoin-iterate -q --tx=%bh,%tl

This will produce output like:

000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f,204
00000000839a8e6886ab5951d76f411475428afc90947ee320161bbf18eb6048,134
000000006a625f06636b8bb6ac7b960a8d03705d1ace08b1a19da3fdcc99ddbd,134
0000000082b5015589a3fdf2d4baff403e6f0be035a5d9742c1cae6295464449,134
000000004ebadb55ee9096c9a2f8880e09da59c0d68b1c228da88e48844a1485,134

…

Show output script sizes in the main chain (block number, transaction number, output number, output script length):

./bitcoin-iterate -q --output=%bN,%tN,%oN:%ol

This will produce output like:

0,0,0:67
1,0,0:67
2,0,0:67
3,0,0:67
4,0,0:67

…

Show the five largest blocks, by height and blockhash:

./bitcoin-iterate -q --block='%bl %bN %bh' | sort -nr | head -n5

This will produce output like:

999993 343188 96395be50a116886fb04a1262aa89aaa765c4af524d0ae090000000000000000
999991 355770 5ce1f5e58d5d718374b1bdecb474eae5cdd91e1b8a3256050000000000000000
999990 327145 821196665ed237f53ca2c7eafe05c97d26743c07d2b539110000000000000000
999989 345578 0294fa5b68babd848a1fe097b075a856bfd9eb9a619efd130000000000000000
999989 333434 f9776021575b6e408d7745d115db75e17937fc40ab9f0e190000000000000000

…

You can see some examples by looking at the manual page source.

Enhancements

Happy to consider them!

You can reach me on IRC (rusty on #bitcoin-wizards on Freenode), and of course, via pull requests and the Github bug tracker.

Good luck!
Rusty Russell.