Outputs all shielded transactions from BlockSci

shielded-transactions-blocksci.py

import blocksci
import csv

chain = blocksci.Blockchain("/home/gareth/blocksci/zcash-data")

migration_tx = 0
sprout_tx = 0
sprout_fully_shielded = 0
sapling_tx = 0
sapling_fully_shielded = 0

with open('tx_data.csv', mode='w') as tx_data:
    transaction_writer = csv.writer(
        tx_data, delimiter=',', quotechar='"', quoting=csv.QUOTE_MINIMAL)

    transaction_writer.writerow(['Type', 'Hash', 'BlockTime'])

    # Loop through all blocks - can filter by starting and end heights
    for blk in chain:

        for tx in blk:

            if tx.is_sproutshielded and tx.is_saplingshielded:
                # Migration transactions are unique in having both types
                migration_tx += 1
                transaction_writer.writerow(['migration', tx.hash, tx.block_time])
            elif tx.is_saplingshielded:  # this includes shielded, shielding, deshieling
                sapling_tx += 1
                # Only look for fully shielded
                if tx.input_count == 0 and tx.output_count == 0:
                    sapling_fully_shielded += 1
                    transaction_writer.writerow(
                        ['sapling', tx.hash, tx.block_time])
            elif tx.is_sproutshielded:  # this includes shielded, shielding, deshieling
                sprout_tx += 1
                # Only look for fully shielded
                if tx.input_count == 0 and tx.output_count == 0:
                    sprout_fully_shielded += 1
                    transaction_writer.writerow(
                        ['sprout', tx.hash, tx.block_time])

print("All Migration transactions: {}".format(migration_tx))
print("All Sprout transactions: {}".format(sprout_tx))
print("Sprout fully shielded transactions: {}".format(sprout_fully_shielded))
print("All Sapling transactions: {}".format(sapling_tx))
print("Sapling fully shielded transactions: {}".format(sapling_fully_shielded))