Function: bridge_set_outgoing_price
Registered at block:
#30178416
Source Code
# Elliptic Curve parameters for secp256k1
P = 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFC2F
A = 0
B = 7
Gx = 55066263022277343669578718895168534326250603453777594175500187360389116729240
Gy = 32670510020758816978083085130507043184471273380659243275938904335757337482424
G = (Gx, Gy)
N = 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141
K = 10**18
def _inverse_mod(k, p):
if k == 0:
raise
return pow(k, p - 2, p)
def _is_on_curve(point):
if point is None:
return True
x, y = point
return (y * y - (x * x * x + A * x + B)) % P == 0
def _point_add(point1, point2):
if point1 is None:
return point2
if point2 is None:
return point1
x1, y1 = point1
x2, y2 = point2
if x1 == x2 and y1 != y2:
return None
if x1 == x2:
m = (3 * x1 * x1 + A) * _inverse_mod(2 * y1, P)
else:
m = (y2 - y1) * _inverse_mod(x2 - x1, P)
m %= P
x3 = (m * m - x1 - x2) % P
y3 = (m * (x1 - x3) - y1) % P
return (x3, y3)
def _scalar_mult(k, point):
result = None
addend = point
while k:
if k & 1:
result = _point_add(result, addend)
addend = _point_add(addend, addend)
k >>= 1
return result
def _ecdsa_verify(msg_hash_hex, signature_hex, public_key_hex):
assert msg_hash_hex.startswith('0x')
assert signature_hex.startswith('0x')
assert public_key_hex.startswith('0x')
r = int(signature_hex[2:66], 16)
s = int(signature_hex[66:130], 16)
if not (1 <= r < N and 1 <= s < N):
return False
point = (int(public_key_hex[2:66], 16), int(public_key_hex[66:], 16))
# print(type(msg_hash_hex), msg_hash_hex)
e = int(msg_hash_hex[2:], 16)
w = _inverse_mod(s, N)
u1 = (e * w) % N
u2 = (r * w) % N
q = _point_add(_scalar_mult(u1, G), _scalar_mult(u2, point))
if q is None:
return False
x, y = q
return r == x % N
def _ecdsa_recover(msg_hash_hex, signature_hex):
assert msg_hash_hex.startswith('0x')
assert signature_hex.startswith('0x')
r = int(signature_hex[2:66], 16)
s = int(signature_hex[66:130], 16)
z = int(msg_hash_hex[2:], 16)
if len(signature_hex[2:]) == 130:
v = int(signature_hex[130:], 16)
if v >= 27:
recovery_id = v - 27
else:
recovery_id = v
recovery_ids = [recovery_id]
else:
recovery_ids = [0, 1]
for recovery_id in recovery_ids:
for j in range(2):
x = r + j * N
if x >= P:
continue
y_squared = (pow(x, 3, P) + A * x + B) % P
y = pow(y_squared, (P + 1) // 4, P)
if y % 2 != recovery_id:
y = P - y
point = (x, y)
if not _is_on_curve(point):
continue
r_inv = _inverse_mod(r, N)
u1 = (-z * r_inv) % N
u2 = (s * r_inv) % N
q = _point_add(_scalar_mult(u1, G), _scalar_mult(u2, point))
if q is None:
continue
public_key_hex = f"0x{q[0]:064x}{q[1]:064x}"
if _ecdsa_verify(msg_hash_hex, signature_hex, public_key_hex):
return public_key_hex
return None
def _encode_uint256(value):
return value.to_bytes(32, 'big')
def _encode_address(address_str):
address_bytes = bytes.fromhex(address_str[2:])
return b'\x00' * (32 - len(address_bytes)) + address_bytes
def _encode_dynamic_bytes(data_hex):
data_bytes = bytes.fromhex(data_hex)
length = len(data_bytes)
padded_length = (length + 31) // 32 * 32 # Calculate padded length for data
return length.to_bytes(32, 'big') + data_bytes + b'\x00' * (padded_length - length)
# '{"a": [845300000000000000000000002, 8453, 43114, "0x51055892893c17ae7db48a0c0f760145bfe9f1e5", "0x09ace2d19b0273a762b0fe22b9e5199505c778de", 0, "000000000000000000000000490537058bdddaae99dd4da8b5db5675936bfedf0000000000000000000000000000000000000000000000008ac7230489e80000", "0000000000000000000000000000000000000000000000000000000000000000", "034da1308a53b6586fed90af2bd4e48cc863913551cc41d6148f43441691e4fd1ea27a1e3daf2b4c1386d0426cc37a4423729204177740768970937c93d648961c"], "f": "bridge_incoming_process", "p": "zentest"}'
def bridge_incoming_process(info, args):
assert args['f'] == 'bridge_incoming_process'
sender = info['sender']
addr = handle_lookup(sender)
print('bridge_incoming_process')
txid = args['a'][0]
source_chain_id = args['a'][1]
dest_chain_id = args['a'][2]
source_chain_sender = args['a'][3]
dest_chain_recipient = args['a'][4]
gas = args['a'][5]
user_payload = args['a'][6]
exsig = args['a'][7]
signature = args['a'][8]
encoded_txid = _encode_uint256(txid)
encoded_source_chain_id = _encode_uint256(source_chain_id)
encoded_dest_chain_id = _encode_uint256(dest_chain_id)
encoded_source_chain_sender = _encode_address(source_chain_sender)
encoded_dest_chain_recipient = _encode_address(dest_chain_recipient)
offset_user_payload = 6 * 32
encoded_offset_user_payload = _encode_uint256(offset_user_payload)
header = b''.join([
encoded_txid,
encoded_source_chain_id,
encoded_dest_chain_id,
encoded_source_chain_sender,
encoded_dest_chain_recipient,
encoded_offset_user_payload,
])
encoded_user_payload_data = _encode_dynamic_bytes(user_payload)
encoded_data = b''.join([
header,
encoded_user_payload_data,
])
print(f"ABI Encoded Data (Pure Python): 0x{encoded_data.hex()}")
encoded_data_hash = keccak(encoded_data)
x19_msg_prefix = b"\x19Ethereum Signed Message:\n" + str(len(encoded_data_hash)).encode('utf-8')
x19_msg_hash = keccak(x19_msg_prefix + encoded_data_hash)
print(f"x19_msg (Pure Python): 0x{x19_msg_hash.hex()}")
print('x19', '0x'+x19_msg_hash.hex())
print('signature', '0x'+signature)
recovered_public_key = _ecdsa_recover('0x'+x19_msg_hash.hex(), '0x'+signature)
print(f"recovered public key: {recovered_public_key}")
if recovered_public_key:
public_key_bytes = bytes.fromhex(recovered_public_key[2:])
address_bytes = keccak(public_key_bytes)[-20:]
address = '0x' + address_bytes.hex()
print(f"Recovered Ethereum address: {address}")
event('BridgeProcess', [address])
def bridge_incoming(info, args):
assert args['f'] == 'bridge_incoming'
print('bridge_incoming', args)
tick = args['a'][0]
assert type(tick) is str
assert len(tick) > 0 and len(tick) < 42
assert tick[0] in string.ascii_uppercase
assert set(tick) <= set(string.ascii_uppercase+string.digits+'_')
operator, _ = get(tick, 'incoming_operator', None)
assert operator is not None, "Bridge is not initialized"
sender = info['sender']
assert sender == operator, "Only the operator can perform this operation"
amount = int(args['a'][1])
assert amount > 0
receiver = args['a'][2].lower()
assert len(receiver) <= 42
assert type(receiver) is str
if len(receiver) == 42:
assert receiver.startswith('0x')
assert set(receiver[2:]) <= set(string.digits+'abcdef')
else:
assert len(receiver) > 4
balance, _ = get(tick, 'balance', 0, receiver)
balance = int(balance)
balance += amount
put(receiver, tick, 'balance', balance, receiver)
asset_owner, _ = get('asset', 'owner', None, tick)
total, _ = get(tick, 'total', 0)
total = int(total)
total += amount
put(asset_owner, tick, 'total', total)
# call('trade_market_order', ['USDC', None, 'ZENT', 50 * 10**18 // 1000])
# sender_balance, _ = get(tick_1, 'balance', 0, addr)
print('tick', tick, 'balance', balance)
# print('quote_value > 0', quote_value)
if tick != 'USDC':
return
base_tick = 'ZENT'
quote_tick = tick
pair = '%s_%s' % (base_tick, quote_tick)
addr = receiver
quote_sum = 0
quote_balance = balance
base_value = 10**18 // 1000 * 50 # 50 bytes
trade_sell_start, _ = get('trade', f'{pair}_sell_start', 1)
# trade_buy_start, _ = get('trade', f'{pair}_buy_start', 1)
# break until the base balance is enough
trade_sell_id = trade_sell_start
while True:
sell, _ = get('trade', f'{pair}_sell', None, str(trade_sell_id))
if sell is None:
break
price = sell[3]
print(-sell[1], quote_balance * K // price, base_value)
dx_base = min(-sell[1], quote_balance * K // price, base_value)
dx_quote = dx_base * price // K
if dx_base == 0 or dx_quote == 0:
break
sell[1] += dx_base
sell[2] -= dx_quote
if quote_balance - dx_quote < 0:
break
quote_balance -= dx_quote
quote_sum += dx_quote
if sell[1] == 0 or sell[1] // price == 0:
if sell[4]:
prev_sell, _ = get('trade', f'{pair}_sell', None, str(sell[4]))
prev_sell[5] = sell[5]
put(prev_sell[0], 'trade', f'{pair}_sell', prev_sell, str(sell[4]))
if sell[5]:
next_sell, _ = get('trade', f'{pair}_sell', None, str(sell[5]))
next_sell[4] = sell[4]
put(next_sell[0], 'trade', f'{pair}_sell', next_sell, str(sell[5]))
if sell[4] is not None and sell[5] is None:
trade_sell_start = sell[4]
put(addr, 'trade', f'{pair}_sell_start', trade_sell_start)
elif sell[4] is None and sell[5] is None:
trade_sell_new, _ = get('trade', f'{pair}_sell_new', 1)
trade_sell_start = trade_sell_new
put(addr, 'trade', f'{pair}_sell_start', trade_sell_start)
print(f'{pair}_sell_to_refund', sell)
if sell[1] < 0:
balance, _ = get(base_tick, 'balance', 0, sell[0])
balance -= sell[1]
assert balance >= 0
put(sell[0], base_tick, 'balance', balance, sell[0])
put(sell[0], 'trade', f'{pair}_sell', None, str(trade_sell_id))
else:
put(sell[0], 'trade', f'{pair}_sell', sell, str(trade_sell_id))
balance, _ = get(quote_tick, 'balance', 0, sell[0])
balance += dx_quote
assert balance >= 0
put(addr, quote_tick, 'balance', balance, sell[0])
base_value -= dx_base
assert base_value >= 0
balance, _ = get(base_tick, 'balance', 0, addr)
balance += dx_base
assert balance >= 0
put(addr, base_tick, 'balance', balance, addr)
if sell[4] is None:
break
trade_sell_id = sell[4]
balance, _ = get(quote_tick, 'balance', 0, addr)
balance -= quote_sum
assert balance >= 0
put(addr, quote_tick, 'balance', balance, addr)
def bridge_outgoing(info, args):
assert args['f'] == 'bridge_outgoing'
tick = args['a'][0]
assert type(tick) is str
assert len(tick) > 0 and len(tick) < 42
assert tick[0] in string.ascii_uppercase
assert set(tick) <= set(string.ascii_uppercase+string.digits+'_')
amount = int(args['a'][1])
assert amount > 0
chain = args['a'][2]
assert chain in ['op-sepolia']
sender = info['sender']
def bridge_set_operator(info, args):
assert args['f'] == 'bridge_set_operator'
print('bridge_set_operator', args)
tick = args['a'][0]
assert type(tick) is str
assert len(tick) > 0 and len(tick) < 42
assert tick[0] in string.ascii_uppercase
assert set(tick) <= set(string.ascii_uppercase+string.digits+'_')
asset_owner, _ = get('asset', 'owner', None, tick)
sender = info['sender']
addr = handle_lookup(sender)
print('bridge_set_operator', asset_owner, addr)
assert addr == asset_owner, "Only the asset owner can perform this operation"
operator = args['a'][1].lower()
assert type(operator) is str
assert len(operator) == 42
assert operator.startswith('0x')
assert set(operator[2:]) <= set(string.digits+'abcdef')
put(addr, tick, 'incoming_operator', operator)
def bridge_remove_operator(info, args):
assert args['f'] == 'bridge_remove_operator'
print('bridge_remove_operator', args)
tick = args['a'][0]
assert type(tick) is str
assert len(tick) > 0 and len(tick) < 42
assert tick[0] in string.ascii_uppercase
assert set(tick) <= set(string.ascii_uppercase+string.digits+'_')
asset_owner, _ = get('asset', 'owner', None, tick)
sender = info['sender']
addr = handle_lookup(sender)
# print('bridge_remove_operator', asset_owner, addr)
assert addr == asset_owner, "Only the asset owner can perform this operation"
# operator = args['a'][1].lower()
# assert type(operator) is str
# assert len(operator) == 42
# assert operator.startswith('0x')
# assert set(operator[2:]) <= set(string.digits+'abcdef')
put(addr, tick, 'incoming_operator', None)
def bridge_set_outgoing_price(info, args):
assert args['f'] == 'bridge_set_outgoing_price'
print('bridge_set_outgoing_price', args)
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