def dump_utxos(datadir, output_dir, n, convert_segwit, maxT=0, debug=True):
i = 0
k = 1
print('new file')
f = new_utxo_file(output_dir, k)
for value in ldb_iter(datadir):
tx_hash, height, index, amt, script = value
if convert_segwit:
script = unwitness(script, debug)
if debug:
print(k, i, hexlify(tx_hash[::-1]), height, index,
amt, hexlify(script))
f.write(struct.pack('<QQ', amt, len(script)))
f.write(script)
f.write('\n')
i += 1
if i % n == 0:
f.close()
k += 1
print('new file: {}'.format(k))
f = new_utxo_file(output_dir, k)
if maxT != 0 and i >= maxT:
break
f.close()
def dump_utxos(datadir, output_dir, n, convert_segwit, maxT, debug, fileNum):
# print("Starting to write Z-transactions")
j = 0 #total utxo
i = 0 #keep track of utxo per file
k = fileNum #relative number of file
n = 0 #number of files written
print('new file')
f = new_utxo_file(output_dir, k)
n += 1
print('new_utxo_file path: ', f)
for value in ldb_iter(datadir):
tx_hash, height, index, amt, script = value
if debug:
print "Height: %d" % height
print "Reversed: "
reversedString = hexlify(tx_hash)
print("".join(
reversed([
reversedString[x:x + 2]
for x in range(0, len(reversedString), 2)
])))
print ""
if convert_segwit:
script = unwitness(script, debug)
f.write(struct.pack('<QQ', amt, len(script)))
f.write(script)
# append first sha256(transaction + its length)
sha = hashlib.sha256()
sha.update(struct.pack('<QQ', amt, len(script)) + script)
sha256_hash = sha.digest()
# print("SHA256: ", hexlify(sha256_hash))
# print("SHA256: ", hexlify(sha256_hash[::-1]))
f.write(sha256_hash[::-1])
f.write('\n')
i += 1
j += 1
if i >= maxT:
f.close()
k += 1
i = 0
f = new_utxo_file(output_dir, k)
n += 1
f.close()
print("##########################################")
print("Total T written: \t%d" % j)
print("##########################################")
return {'t_transactions_total': j, 't_files_written': n}