async def sign_psbt_buf_OLD(psbt_buf):
# sign a PSBT string
from common import dis
from sram4 import tmp_buf
from utils import HexStreamer, Base64Streamer, HexWriter, Base64Writer
UserAuthorizedAction.cleanup()
# Determine encoding used
psbt_len = len(psbt_buf)
taste = psbt_buf[0:10]
print('sign_psbt_buf: 1')
if taste[0:5] == b'psbt\xff':
print('sign_psbt_buf: 2')
print("sign 1")
decoder = None
def output_encoder(x): return x
elif taste[0:10] == b'70736274ff':
print("sign 2")
decoder = HexStreamer()
output_encoder = HexWriter
psbt_len //= 2
elif taste[0:6] == b'cHNidP':
print("sign 3")
decoder = Base64Streamer()
output_encoder = Base64Writer
psbt_len = (psbt_len * 3 // 4) + 10
print('sign_psbt_buf: 3')
async def done(psbt):
if psbt.is_complete():
psbt.finalize(fd)
else:
psbt.serialize(fd)
ch = await ux_show_signed_transaction()
await ux_show_story(msg, title='PSBT Signed')
UserAuthorizedAction.cleanup()
print('sign_psbt_buf: 4')
UserAuthorizedAction.active_request = ApproveTransaction(
psbt_len, approved_cb=done, psbt_buf=psbt_buf)
print('sign_psbt_buf: 5')
# Kill any menu stack, and put our thing at the top
abort_and_goto(UserAuthorizedAction.active_request)
print('sign_psbt_buf: 6')
def sign_psbt_file(filename):
# sign a PSBT file found on a MicroSD card
from files import CardSlot, CardMissingError, securely_blank_file
from main import dis
from sram2 import tmp_buf
from utils import HexStreamer, Base64Streamer, HexWriter, Base64Writer
UserAuthorizedAction.cleanup()
#print("sign: %s" % filename)
# copy file into our spiflash
# - can't work in-place on the card because we want to support writing out to different card
# - accepts hex or base64 encoding, but binary prefered
with CardSlot() as card:
with open(filename, 'rb') as fd:
dis.fullscreen('Reading...')
# see how long it is
psbt_len = fd.seek(0, 2)
fd.seek(0)
# determine encoding used, altho we prefer binary
taste = fd.read(10)
fd.seek(0)
if taste[0:5] == b'psbt\xff':
decoder = None
output_encoder = lambda x: x
elif taste[0:10] == b'70736274ff':
decoder = HexStreamer()
output_encoder = HexWriter
psbt_len //= 2
elif taste[0:6] == b'cHNidP':
decoder = Base64Streamer()
output_encoder = Base64Writer
psbt_len = (psbt_len * 3 // 4) + 10
total = 0
with SFFile(TXN_INPUT_OFFSET, max_size=psbt_len) as out:
# blank flash
await out.erase()
while 1:
n = fd.readinto(tmp_buf)
if not n: break
if n == len(tmp_buf):
abuf = tmp_buf
else:
abuf = memoryview(tmp_buf)[0:n]
if not decoder:
out.write(abuf)
total += n
else:
for here in decoder.more(abuf):
out.write(here)
total += len(here)
dis.progress_bar_show(total / psbt_len)
# might have been whitespace inflating initial estimate of PSBT size
assert total <= psbt_len
psbt_len = total
async def done(psbt):
orig_path, basename = filename.rsplit('/', 1)
orig_path += '/'
base = basename.rsplit('.', 1)[0]
out2_fn = None
out_fn = None
txid = None
from main import settings
import os
del_after = settings.get('del', 0)
while 1:
# try to put back into same spot, but also do top-of-card
is_comp = psbt.is_complete()
if not is_comp:
# keep the filename under control during multiple passes
target_fname = base.replace('-part', '')+'-part.psbt'
else:
# add -signed to end. We won't offer to sign again.
target_fname = base+'-signed.psbt'
for path in [orig_path, None]:
try:
with CardSlot() as card:
out_full, out_fn = card.pick_filename(target_fname, path)
out_path = path
if out_full: break
except CardMissingError:
prob = 'Missing card.\n\n'
out_fn = None
if not out_fn:
# need them to insert a card
prob = ''
else:
# attempt write-out
try:
with CardSlot() as card:
if is_comp and del_after:
# don't write signed PSBT if we'd just delete it anyway
out_fn = None
else:
with output_encoder(open(out_full, 'wb')) as fd:
# save as updated PSBT
psbt.serialize(fd)
if is_comp:
# write out as hex too, if it's final
out2_full, out2_fn = card.pick_filename(
base+'-final.txn' if not del_after else 'tmp.txn', out_path)
if out2_full:
with HexWriter(open(out2_full, 'w+t')) as fd:
# save transaction, in hex
txid = psbt.finalize(fd)
if del_after:
# rename it now that we know the txid
after_full, out2_fn = card.pick_filename(
txid+'.txn', out_path, overwrite=True)
os.rename(out2_full, after_full)
if del_after:
# this can do nothing if they swapped SDCard between steps, which is ok,
# but if the original file is still there, this blows it away.
# - if not yet final, the foo-part.psbt file stays
try:
securely_blank_file(filename)
except: pass
# success and done!
break
except OSError as exc:
prob = 'Failed to write!\n\n%s\n\n' % exc
sys.print_exception(exc)
# fall thru to try again
# prompt them to input another card?
ch = await ux_show_story(prob+"Please insert an SDCard to receive signed transaction, "
"and press OK.", title="Need Card")
if ch == 'x':
await ux_aborted()
return
# done.
if out_fn:
msg = "Updated PSBT is:\n\n%s" % out_fn
if out2_fn:
msg += '\n\n'
else:
# del_after is probably set
msg = ''
if out2_fn:
msg += 'Finalized transaction (ready for broadcast):\n\n%s' % out2_fn
if txid and not del_after:
msg += '\n\nFinal TXID:\n'+txid
await ux_show_story(msg, title='PSBT Signed')
UserAuthorizedAction.cleanup()
UserAuthorizedAction.active_request = ApproveTransaction(psbt_len, approved_cb=done)
# kill any menu stack, and put our thing at the top
abort_and_goto(UserAuthorizedAction.active_request)
def sign_psbt_buf(psbt_buf):
# sign a PSBT file found on a microSD card
from uio import BytesIO
from common import dis
from sram4 import tmp_buf
from utils import HexStreamer, Base64Streamer, HexWriter, Base64Writer
UserAuthorizedAction.cleanup()
# copy buffer into SPI Flash
# - accepts hex or base64 encoding, but binary prefered
with BytesIO(psbt_buf) as fd:
dis.fullscreen('Reading...')
# see how long it is
psbt_len = fd.seek(0, 2)
fd.seek(0)
# determine encoding used, altho we prefer binary
taste = fd.read(10)
fd.seek(0)
if taste[0:5] == b'psbt\xff':
print('tastes like text PSBT')
decoder = None
def output_encoder(x): return x
elif taste[0:10] == b'70736274ff':
print('tastes like binary PSBT')
decoder = HexStreamer()
output_encoder = HexWriter
psbt_len //= 2
elif taste[0:6] == b'cHNidP':
print('tastes like Base64 PSBT')
decoder = Base64Streamer()
output_encoder = Base64Writer
psbt_len = (psbt_len * 3 // 4) + 10
else:
return
total = 0
with SFFile(TXN_INPUT_OFFSET, max_size=psbt_len) as out:
print('sign 1')
# blank flash
await out.erase()
print('sign 2')
while 1:
n = fd.readinto(tmp_buf)
print('sign copy to SPI flash 1: n={}'.format(n))
if not n:
break
if n == len(tmp_buf):
abuf = tmp_buf
else:
abuf = memoryview(tmp_buf)[0:n]
if not decoder:
out.write(abuf)
total += n
else:
for here in decoder.more(abuf):
out.write(here)
total += len(here)
print('sign copy to SPI flash 2: {}/{} = {}'.format(total, psbt_len, total/psbt_len))
dis.progress_bar_show(total / psbt_len)
print('sign 3')
# might have been whitespace inflating initial estimate of PSBT size
assert total <= psbt_len
psbt_len = total
print('sign 4')
# Create a new BytesIO() to hold the result
async def done(psbt):
print('sign 5: done')
signed_bytes = None
with BytesIO() as bfd:
with output_encoder(bfd) as fd:
print('sign 6: done')
if psbt.is_complete():
print('sign 7: done')
psbt.finalize(fd)
print('sign 8: done')
else:
print('sign 9: done')
psbt.serialize(fd)
print('sign 10: done')
bfd.seek(0)
signed_bytes = bfd.read()
print('signed_bytes={}'.format(signed_bytes))
print('sign 11: done')
gc.collect()
from ur1.encode_ur import encode_ur
from ubinascii import hexlify
signed_str = hexlify(signed_bytes)
print('signed_str={}'.format(signed_str))
from ux import DisplayURCode
o = DisplayURCode('Signed Txn', 'Scan to Wallet', signed_str)
await o.interact_bare()
UserAuthorizedAction.cleanup()
print('sign 12: done')
UserAuthorizedAction.active_request = ApproveTransaction(psbt_len, approved_cb=done)
print('sign 13: done')
# kill any menu stack, and put our thing at the top
abort_and_goto(UserAuthorizedAction.active_request)
print('sign 14: done')