Split Raw transaction

split-transaction-raw.py

# define P1_FIRST 0x00
# define P1_MORE 0x80
# define P1_LAST 0x90


from google.protobuf.internal.decoder import _DecodeVarint32

from base import parse_bip32_path



def decode_varint32(raw, offset):
    key, pos = _DecodeVarint32(raw, offset)
    # print(f"! Remain: {len(raw[offset:])}")
    # print(f"! Varint: fieldNo={key >> 3} type={key & 0x7}, pos={pos}")
    return key, pos

def get_next_length(tx):
    field, pos = decode_varint32(tx, 0)
    size, newpos = decode_varint32(tx, pos)
    if field & 0x07 == 0:
        return newpos
    return size + newpos


transactionRaw = bytes.fromhex(
    "0a027d52220889fd90c45b71f24740e0bcb0f2be2c5a67080112630a2d747970"
    "652e676f6f676c65617069732e636f6d2f70726f746f636f6c2e5472616e7366"
    "6572436f6e747261637412320a1541c8599111f29c1e1e061265b4af93ea1f27"
    "4ad78a1215414f560eb4182ca53757f905609e226e96e8e1a80c18c0843d70d0"
    "f5acf2be2c"
)

# set_permission
transactionRaw = bytes.fromhex(
    "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"
)

transactionRaw = bytes.fromhex(
    "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"
)

path = "44'/195'/0'/0/0"

donglePath = parse_bip32_path(path)


def apduMessage(INS, P1, P2, MESSAGE):
    hexString = "E0{:02x}{:02x}{:02x}{:02x}{}".format(INS, P1, P2, len(MESSAGE) // 2, MESSAGE)
    print('send hex:', hexString)


def sign(path, tx, signatures=[], verbose=False):
    max_length = 255
    to_send = []
    start_bytes = []

    data = bytearray.fromhex(f"05{path}")
    while len(tx) > 0:
        # get next message field
        newpos = get_next_length(tx)
        assert newpos < max_length
        if (len(data) + newpos) > max_length:
            # add chunk
            to_send.append(data.hex())
            data = bytearray()
            continue
        # append to data
        data.extend(tx[:newpos])
        tx = tx[newpos:]
    # append last
    to_send.append(data.hex())
    token_pos = len(to_send)
    to_send.extend(signatures)

    if len(to_send) == 1:
        start_bytes.append(0x10)
    else:
        start_bytes.append(0x00)
        for i in range(1, len(to_send) - 1):
            if i >= token_pos:
                start_bytes.append(0xA0 | 0x00 | i - token_pos)
            else:
                start_bytes.append(0x80)

        if not (signatures is None) and len(signatures) > 0:
            start_bytes.append(0xA0 | 0x08 | len(signatures) - 1)
        else:
            start_bytes.append(0x90)

    result = None
    for i in range(len(to_send)):
        pack = apduMessage(0x04, start_bytes[i], 0x00, to_send[i])
        # result, status = self.exchange(pack, True)
        # if not (status == 0x9000):
        #    return None, status

    return result, 0x9000
    # send signature if any


sign(donglePath, transactionRaw)