def _structure_from_instance(self):
""" Override parent method to add tx special data. """
struct = super()._structure_from_instance()
struct.update({
'type': self.TYPE,
'data': {
'coin_to_sell':
MinterHelper.encode_coin_name(self.coin_to_sell),
'coin_to_buy': MinterHelper.encode_coin_name(self.coin_to_buy),
'min_value_to_buy': MinterHelper.to_pip(self.min_value_to_buy)
}
})
return struct
def sign(self, private_key):
"""
Sign check
Args:
private_key (str)
"""
# Prepare structure
# It contains nonce, chain_id, due_block, coin, value, gas_coin,
# lock, v, r, s.
# lock, v, r, s appended later in code
structure = [
int(str(self.nonce).encode().hex(), 16), self.chain_id,
self.due_block,
MinterHelper.encode_coin_name(self.coin),
MinterHelper.to_pip(self.value),
MinterHelper.encode_coin_name(self.gas_coin)
]
# Create msg hash
msg_hash = self.__hash(structure)
# SHA256 from passphrase
sha = hashlib.sha256()
sha.update(self.passphrase.encode())
passphrase = sha.hexdigest()
# Create lock from signature
self.lock = self.__lockfromsignature(
signature=ECDSA.sign(message=msg_hash, private_key=passphrase))
# Re-create msg hash with adding lock to structure
structure.append(self.lock)
msg_hash = self.__hash(structure)
# Re-create signature, add it to check attrs and to structure
signature = ECDSA.sign(message=msg_hash, private_key=private_key)
self.signature = {
'v': signature[0],
'r': format(signature[1], 'x'),
's': format(signature[2], 'x')
}
structure += signature
# Get RLP, which will be the check
check = rlp.encode(structure).hex()
return MinterHelper.prefix_add(check, PREFIX_CHECK)
def from_raw(cls, rawcheck):
"""
Create check instance from raw check
Args:
rawcheck (str)
Returns:
MinterCheck
"""
# Remove check prefix and RLP decode it
rawcheck = MinterHelper.prefix_remove(rawcheck)
rawcheck = bytes.fromhex(rawcheck)
decoded = rlp.decode(rawcheck)
# Create MinterCheck instance
kwargs = {
'nonce': int(decoded[0].decode()),
'chain_id': int.from_bytes(decoded[1], 'big'),
'due_block': int.from_bytes(decoded[2], 'big'),
'coin': MinterHelper.decode_coin_name(decoded[3]),
'value': MinterHelper.to_bip(int.from_bytes(decoded[4], 'big')),
'gas_coin': MinterHelper.decode_coin_name(decoded[5]),
'lock': decoded[6].hex(),
'signature': {
'v': int.from_bytes(decoded[7], 'big'),
'r': decoded[8].hex(),
's': decoded[9].hex()
}
}
check = MinterCheck(**kwargs)
# Recover owner address
msg_hash = cls.__hash(data=[
int(str(check.nonce).encode().hex(), 16), check.chain_id,
check.due_block,
MinterHelper.encode_coin_name(check.coin),
MinterHelper.to_pip(check.value),
MinterHelper.encode_coin_name(check.gas_coin),
bytes.fromhex(check.lock)
])
public_key = ECDSA.recover(msg_hash, tuple(check.signature.values()))
public_key = MinterHelper.prefix_add(public_key, PREFIX_PUBKEY)
check.owner = MinterWallet.get_address_from_public_key(public_key)
return check
def _structure_from_instance(self):
""" Override parent method to add tx special data. """
struct = super()._structure_from_instance()
struct.update({
'type': self.TYPE,
'data': {
'coin': MinterHelper.encode_coin_name(self.coin),
'to': bytes.fromhex(MinterHelper.prefix_remove(self.to)),
'value': MinterHelper.to_pip(self.value)
}
})
return struct
def _structure_from_instance(self):
""" Override parent method to add tx special data. """
struct = super()._structure_from_instance()
struct.update({'type': self.TYPE, 'data': {'txs': []}})
# Populate multi data from each single tx.
for item in self.txs:
struct['data']['txs'].append([
MinterHelper.encode_coin_name(item['coin'].upper()),
bytes.fromhex(MinterHelper.prefix_remove(item['to'])),
MinterHelper.to_pip(item['value'])
])
return struct
def _structure_from_instance(self):
""" Override parent method. """
struct = super()._structure_from_instance()
struct.update({
'type': self.TYPE,
'data': {
'name': self.name,
'symbol': MinterHelper.encode_coin_name(self.symbol),
'initial_amount': MinterHelper.to_pip(self.initial_amount),
'initial_reserve': MinterHelper.to_pip(self.initial_reserve),
'crr': '' if self.crr == 0 else self.crr,
'max_supply': MinterHelper.to_pip(self.max_supply)
}
})
return struct
def _structure_from_instance(self):
""" Override parent method. """
struct = super()._structure_from_instance()
struct.update({
'type': self.TYPE,
'data': {
'address':
bytes.fromhex(MinterHelper.prefix_remove(self.address)),
'pub_key':
bytes.fromhex(MinterHelper.prefix_remove(self.pub_key)),
'commission': '' if self.commission == 0 else self.commission,
'coin': MinterHelper.encode_coin_name(self.coin),
'stake': MinterHelper.to_pip(self.stake)
}
})
return struct
def _structure_from_instance(self):
"""
Populating structure dict by instance values.
Prepare values for signing process.
"""
struct = copy.copy(self._STRUCTURE_DICT)
struct.update({
'nonce': self.nonce,
'chain_id': self.chain_id,
'gas_price': self.gas_price,
'gas_coin': MinterHelper.encode_coin_name(self.gas_coin),
'payload': self.payload,
'service_data': self.service_data,
'signature_type': self.signature_type
})
return struct
