def token_approve(assets: str, mixer_addr: str, asset_addr: str, username: str,
password: str):
"""
Approve the mixer to spend some amount of assets
"""
approve_value = EtherValue(assets)
#eth_addr = load_eth_address(eth_addr)
#client_ctx = ctx.obj
#web3 = open_web3_from_ctx(client_ctx)
#mixer_desc = load_mixer_description_from_ctx(client_ctx)
#if not mixer_desc.asset:
# raise ClickException("no asset for mixer {mixer_desc.mixer.address}")
asset_instance = BAC001(asset_addr)
keystore_file = "{}/{}/{}".format(USER_DIR, username, FISCO_ADDRESS_FILE)
with open(keystore_file, "r") as dump_f:
keytext = json.load(dump_f)
privkey = Account.decrypt(keytext, password)
asset_instance.client.ecdsa_account = Account.from_key(privkey)
keypair = BcosKeyPair()
keypair.private_key = asset_instance.client.ecdsa_account.privateKey
keypair.public_key = asset_instance.client.ecdsa_account.publickey
keypair.address = asset_instance.client.ecdsa_account.address
asset_instance.client.keypair = keypair
print(f"- {username} approves the transfer of BAC001asset to the Mixer")
out, transactionReceipt = asset_instance.approve(mixer_addr,
approve_value.wei)
print("approve tranaction output", out)
outputresult = asset_instance.allowance(
asset_instance.client.ecdsa_account.address, mixer_addr)
print(f"- The allowance for the Mixer from {username} is: {outputresult}")
return outputresult
def load_default_account(self):
if client_config.crypto_type == CRYPTO_TYPE_GM:
# 加载国密账号
if self.gm_account is not None:
return # 不需要重复加载
try:
self.gm_account = GM_Account()
self.gm_account_file = "{}/{}".format(client_config.account_keyfile_path,
client_config.gm_account_keyfile)
if os.path.exists(self.gm_account_file) is False:
raise BcosException(("gm account keyfile file {} doesn't exist, "
"please check client_config.py again "
"and make sure this account exist")
.format(self.gm_account_file))
self.gm_account.load_from_file(
self.gm_account_file, client_config.gm_account_password)
self.keypair = self.gm_account.keypair
return
except Exception as e:
raise BcosException("load gm account from {} failed, reason: {}"
.format(self.gm_account_file, e))
# 默认的 ecdsa 账号
try:
if self.ecdsa_account is not None:
return # 不需要重复加载
# check account keyfile
self.keystore_file = "{}/{}".format(client_config.account_keyfile_path,
client_config.account_keyfile)
if os.path.exists(self.keystore_file) is False:
raise BcosException(("keystore file {} doesn't exist, "
"please check client_config.py again "
"and make sure this account exist")
.format(self.keystore_file))
with open(self.keystore_file, "r") as dump_f:
keytext = json.load(dump_f)
privkey = Account.decrypt(keytext, client_config.account_password)
self.ecdsa_account = Account.from_key(privkey)
keypair = BcosKeyPair()
keypair.private_key = self.ecdsa_account.privateKey
keypair.public_key = self.ecdsa_account.publickey
keypair.address = self.ecdsa_account.address
self.keypair = keypair
except Exception as e:
raise BcosException("load account from {} failed, reason: {}"
.format(self.keystore_file, e))
def getBalance(request) -> None:
result = {}
req = json.loads(request.body)
bac_instance = BAC001(req['token_address'])
keystore_file = "{}/{}/{}".format(USER_DIR, req['username'],
FISCO_ADDRESS_FILE)
with open(keystore_file, "r") as dump_f:
keytext = json.load(dump_f)
privkey = Account.decrypt(keytext, req['password'])
bac_instance.client.ecdsa_account = Account.from_key(privkey)
keypair = BcosKeyPair()
keypair.private_key = bac_instance.client.ecdsa_account.privateKey
keypair.public_key = bac_instance.client.ecdsa_account.publickey
keypair.address = bac_instance.client.ecdsa_account.address
bac_instance.client.keypair = keypair
balance = bac_instance.balance(bac_instance.client.ecdsa_account.address)
result['status'] = 0
result['balance'] = balance[0] / 1000000000000000000.0
return JsonResponse(result)
def create_zeth_client_and_mixer_desc(
prover_server_endpoint: str, mixer_addr: str, username: str,
password: str) -> Tuple[MixerClient, MixerDescription]:
"""
Create a MixerClient and MixerDescription object, for an existing deployment.
"""
#web3 = open_web3_from_ctx(ctx)
#mixer_desc = load_mixer_description_from_ctx(ctx)
mixer_instance = Groth16Mixer(mixer_addr)
keystore_file = "{}/{}/{}".format(USER_DIR, username, FISCO_ADDRESS_FILE)
if exists(keystore_file) is False:
raise ClickException(f"invalid output spec: {keystore_file}")
with open(keystore_file, "r") as dump_f:
keytext = json.load(dump_f)
privkey = Account.decrypt(keytext, password)
mixer_instance.client.ecdsa_account = Account.from_key(privkey)
keypair = BcosKeyPair()
keypair.private_key = mixer_instance.client.ecdsa_account.privateKey
keypair.public_key = mixer_instance.client.ecdsa_account.publickey
keypair.address = mixer_instance.client.ecdsa_account.address
mixer_instance.client.keypair = keypair
zeth_client = MixerClient.open(prover_server_endpoint, mixer_instance)
return (zeth_client)
def sendAsset(request) -> None:
result = {}
req = json.loads(request.body)
asset_instance = BAC001(req['token_address'])
keystore_file = "{}/{}/{}".format(USER_DIR, req['username'],
FISCO_ADDRESS_FILE)
with open(keystore_file, "r") as dump_f:
keytext = json.load(dump_f)
privkey = Account.decrypt(keytext, req['password'])
asset_instance.client.ecdsa_account = Account.from_key(privkey)
keypair = BcosKeyPair()
keypair.private_key = asset_instance.client.ecdsa_account.privateKey
keypair.public_key = asset_instance.client.ecdsa_account.publickey
keypair.address = asset_instance.client.ecdsa_account.address
asset_instance.client.keypair = keypair
print(f"- {req['username']} the transfer of BAC001asset to the Mixer")
value = EtherValue(req['value'])
out, transactionReceipt = asset_instance.send(req['fiscoAddress'],
value.wei, '')
print("send tranaction output {}", out)
balance = asset_instance.balance(keypair.address)
result['status'] = 0
result['balance'] = balance[0] / 1000000000000000000.0
return JsonResponse(result)
def main() -> None:
print("***********************")
zksnark = zeth.zksnark.get_zksnark_provider("GROTH16")
#web3, eth = mock.open_test_web3()
'''
# Ethereum addresses
deployer_eth_address = eth.accounts[0]
bob_eth_address = eth.accounts[1]
alice_eth_address = eth.accounts[2]
charlie_eth_address = eth.accounts[3]
'''
account_keyfile_path = "python_web3/bin/accounts" # 保存keystore文件的路径，在此路径下,keystore文件以 [name].keystore命名
account_keyfile = "pyaccount.keystore"
keystore_file = "{}/{}".format(account_keyfile_path, account_keyfile)
with open(keystore_file, "r") as dump_f:
keytext = json.load(dump_f)
privkey = Account.decrypt(keytext, "123456")
deployer_ac = Account.from_key(privkey)
# Fisco-bcos addresses
bob_password = "******"
alice_password = "******"
charlie_password = "******"
bob_ac = Account.create(bob_password)
alice_ac = Account.create(alice_password)
charlie_ac = Account.create(charlie_password)
#keypair
deployer_keypair = BcosKeyPair()
deployer_keypair.private_key = deployer_ac.privateKey
deployer_keypair.public_key = deployer_ac.publickey
deployer_keypair.address = deployer_ac.address
bob_keypair = BcosKeyPair()
bob_keypair.private_key = bob_ac.privateKey
bob_keypair.public_key = bob_ac.publickey
bob_keypair.address = bob_ac.address
# alice_keypair = BcosKeyPair()
# alice_keypair.private_key = alice_ac.privateKey
# alice_keypair.public_key = alice_ac.publickey
# alice_keypair.address = alice_ac.address
charlie_keypair = BcosKeyPair()
charlie_keypair.private_key = charlie_ac.privateKey
charlie_keypair.public_key = charlie_ac.publickey
charlie_keypair.address = charlie_ac.address
# Zeth addresses
keystore = mock.init_test_keystore()
# Deploy Zeth contracts
tree_depth = constants.ZETH_MERKLE_TREE_DEPTH
asset_address = deploy_asset("AAAA", "AAA", 18, 100000000)
token_instance = BAC001(asset_address)
mixer_address = deploy(asset_address)
mixer_instance = Groth16Mixer(mixer_address)
mixer_instance.client.ecdsa_account = deployer_ac
mixer_instance.client.keypair = deployer_keypair
print("token address: ", mixer_instance.token())
zeth_client = MixerClient.open(PROVER_SERVER_ENDPOINT_DEFAULT,
mixer_instance)
mk_tree = zeth.merkle_tree.MerkleTree.empty_with_depth(tree_depth)
#mixer_instance = zeth_client.mixer_instance
# Keys and wallets
def _mk_wallet(name: str, sk: ZethAddressPriv) -> Wallet:
wallet_dir = join(mock.TEST_NOTE_DIR, name + "-erc")
if exists(wallet_dir):
# Note: symlink-attack resistance
# https://docs.python.org/3/library/shutil.html#shutil.rmtree.avoids_symlink_attacks
shutil.rmtree(wallet_dir)
return Wallet(mixer_instance, name, wallet_dir, sk)
sk_alice = keystore["Alice"].addr_sk
sk_bob = keystore["Bob"].addr_sk
sk_charlie = keystore["Charlie"].addr_sk
# alice_wallet = _mk_wallet('alice', sk_alice)
# bob_wallet = _mk_wallet('bob', sk_bob)
# charlie_wallet = _mk_wallet('charlie', sk_charlie)
#block_num = 1
# Universal update function
# def _receive_notes(
# out_ev: List[MixOutputEvents]) \
# -> Dict[str, List[ZethNoteDescription]]:
# #nonlocal block_num
# notes = {
# 'alice': alice_wallet.receive_notes(out_ev),
# 'bob': bob_wallet.receive_notes(out_ev),
# 'charlie': charlie_wallet.receive_notes(out_ev),
# }
# alice_wallet.update_and_save_state()
# bob_wallet.update_and_save_state()
# charlie_wallet.update_and_save_state()
# #block_num = block_num + 1
# return notes
print("[INFO] 4. Running tests (asset mixed: ERC20 token)...")
# We assign ETHToken to Bob
print("- Initial balances: ")
print_token_balances(token_instance, bob_ac.address, alice_ac.address,
charlie_ac.address, mixer_address)
# Bob tries to deposit ETHToken, split in 2 notes on the mixer (without
# approving)
token_instance.client.ecdsa_account = bob_ac
token_instance.client.keypair = bob_keypair
zeth_client.mixer_instance.client.ecdsa_account = bob_ac
zeth_client.mixer_instance.client.keypair = bob_keypair
# Bob approves the transfer
print("- Bob approves the transfer of ETHToken to the Mixer")
token_instance.client.ecdsa_account = bob_ac
token_instance.client.keypair = bob_keypair
(outputresult, receipt) = token_instance.send(bob_ac.address,
Web3.toWei(10000, 'ether'),
'')
print("send *****", receipt['status'])
(outputresult, receipt) = token_instance.approve(mixer_address,
scenario.BOB_DEPOSIT_ETH)
# eth.waitForTransactionReceipt(tx_hash)
outputresult = token_instance.allowance(deployer_ac.address, mixer_address)
print("- The allowance for the Mixer from Bob is:", outputresult)
# # Bob deposits ETHToken, split in 2 notes on the mixer
# result_deposit_bob_to_bob = scenario.bob_deposit(
# zeth_client, mk_tree, bob_ac.address, keystore, zeth.utils.EtherValue(0))
#
# print("- Balances after Bob's deposit: ")
# print_token_balances(
# token_instance,
# bob_ac.address,
# alice_ac.address,
# charlie_ac.address,
# mixer_address
# )
#
# # Alice sees a deposit and tries to decrypt the ciphertexts to see if she
# # was the recipient, but Bob was the recipient so Alice fails to decrypt
# received_notes = _receive_notes(
# result_deposit_bob_to_bob.output_events)
# recovered_notes_alice = received_notes['alice']
# assert(len(recovered_notes_alice) == 0), \
# "Alice decrypted a ciphertext that was not encrypted with her key!"
#
# # Bob does a transfer of ETHToken to Charlie on the mixer
#
# # Bob decrypts one of the note he previously received (useless here but
# # useful if the payment came from someone else)
# recovered_notes_bob = received_notes['bob']
# assert(len(recovered_notes_bob) == 2), \
# f"Bob recovered {len(recovered_notes_bob)} notes from deposit, expected 2"
# input_bob_to_charlie = recovered_notes_bob[0].as_input()
'''
# Execution of the transfer
result_transfer_bob_to_charlie = scenario.bob_to_charlie(
zeth_client,
mk_tree,
input_bob_to_charlie,
bob_eth_address,
keystore)
# Bob tries to spend `input_note_bob_to_charlie` twice
result_double_spending = None
try:
result_double_spending = scenario.bob_to_charlie(
zeth_client,
mk_tree,
input_bob_to_charlie,
bob_eth_address,
keystore)
except Exception as e:
print(f"Bob's double spending successfully rejected! (msg: {e})")
assert(result_double_spending is None), "Bob spent the same note twice!"
print("- Balances after Bob's transfer to Charlie: ")
print_token_balances(
token_instance,
bob_eth_address,
alice_eth_address,
charlie_eth_address,
zeth_client.mixer_instance.address
)
# Charlie tries to decrypt the notes from Bob's previous transaction.
received_notes = _receive_notes(
result_transfer_bob_to_charlie.output_events)
note_descs_charlie = received_notes['charlie']
assert(len(note_descs_charlie) == 1), \
f"Charlie decrypted {len(note_descs_charlie)}. Expected 1!"
_ = scenario.charlie_withdraw(
zeth_client,
mk_tree,
note_descs_charlie[0].as_input(),
charlie_eth_address,
keystore)
print("- Balances after Charlie's withdrawal: ")
print_token_balances(
token_instance,
bob_eth_address,
alice_eth_address,
charlie_eth_address,
zeth_client.mixer_instance.address
)
# Charlie tries to carry out a double spend by withdrawing twice the same
# note
result_double_spending = None
try:
# New commitments are added in the tree at each withdraw so we
# recompute the path to have the updated nodes
result_double_spending = scenario.charlie_double_withdraw(
zeth_client,
mk_tree,
note_descs_charlie[0].as_input(),
charlie_eth_address,
keystore)
except Exception as e:
print(f"Charlie's double spending successfully rejected! (msg: {e})")
print("Balances after Charlie's double withdrawal attempt: ")
assert(result_double_spending is None), \
"Charlie managed to withdraw the same note twice!"
print_token_balances(
token_instance,
bob_eth_address,
alice_eth_address,
charlie_eth_address,
zeth_client.mixer_instance.address)
# Bob deposits once again ETH, split in 2 notes on the mixer
# But Charlie attempts to corrupt the transaction (malleability attack)
# Bob approves the transfer
print("- Bob approves the transfer of ETHToken to the Mixer")
tx_hash = approve(
token_instance,
bob_eth_address,
zeth_client.mixer_instance.address,
scenario.BOB_DEPOSIT_ETH)
eth.waitForTransactionReceipt(tx_hash)
allowance_mixer = allowance(
token_instance,
bob_eth_address,
zeth_client.mixer_instance.address)
print("- The allowance for the Mixer from Bob is:", allowance_mixer)
result_deposit_bob_to_bob = scenario.charlie_corrupt_bob_deposit(
zeth_client,
mk_tree,
bob_eth_address,
charlie_eth_address,
keystore)
# Bob decrypts one of the note he previously received (should fail if
# Charlie's attack succeeded)
received_notes = _receive_notes(
result_deposit_bob_to_bob.output_events)
recovered_notes_bob = received_notes['bob']
assert(len(recovered_notes_bob) == 2), \
f"Bob recovered {len(recovered_notes_bob)} notes from deposit, expected 2"
print("- Balances after Bob's last deposit: ")
print_token_balances(
token_instance,
bob_eth_address,
alice_eth_address,
charlie_eth_address,
zeth_client.mixer_instance.address)
'''
print("========================================\n" +
" TESTS PASSED\n" +
"========================================\n")
class GM_Account(object):
keypair = BcosKeyPair()
cbc_iv = b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'
def getdetail(self, sep="\n"):
return self.keypair.getdetail(sep)
def publickey_to_address(self, publickey):
publickeybytes = func.bytes_to_list(bytes(decode_hex(publickey)))
hashres = sm3.sm3_hash(
publickeybytes
) # sm3_hash 对应sm3_implement.py里的sm3_hash,返回的是hex形态的结果
hash_raw = decode_hex(hashres) # 转为bytes
addr_raw = hash_raw[-20:] # 截取20个字节
addr = to_checksum_address(addr_raw) # 转为格式化的地址
return addr
def create(self):
kp = sm2_helper.sm2_key_pair_gen()
self.keypair.private_key = kp[0]
self.keypair.public_key = kp[1]
self.keypair.address = self.publickey_to_address(
self.keypair.public_key)
def from_key(self, privkey):
self.keypair.public_key = sm2_helper.sm2_privkey_to_pub(privkey)
self.keypair.private_key = privkey
self.keypair.address = self.publickey_to_address(
self.keypair.public_key)
def pwd_ljust(self, password):
return password.ljust(16, '0')
def save_to_file(self, filename, password=None):
content = {}
key = self.keypair.private_key
content["address"] = self.keypair.address
content["encrypt"] = False
if password is not None:
crypt_sm4 = CryptSM4()
password = self.pwd_ljust(password)
crypt_sm4.set_key(bytes(password, "utf-8"), SM4_ENCRYPT)
encrypt_value = crypt_sm4.crypt_cbc(
self.cbc_iv, bytes(self.keypair.private_key, "utf-8"))
key = str(base64.b64encode(encrypt_value), "utf-8")
content["encrypt"] = True
content["private_key"] = key
content["type"] = "gm"
# set mac of the password
passwdBytes = bytes(password, "utf-8")
content["mac"] = sm3.sm3_hash(passwdBytes)
with open(filename, "w") as dump_f:
json.dump(content, dump_f, indent=4)
dump_f.close()
# 从文件加载，格式是json
def load_from_file(self, filename, password=None):
if password is None:
return
with open(filename, "r") as dump_f:
content = json.load(dump_f)
dump_f.close()
if content["type"] != "gm":
return
# get and compare mac
expected_mac = content["mac"]
password = self.pwd_ljust(password)
passwdBytes = bytes(password, "utf-8")
mac = sm3.sm3_hash(passwdBytes)
if not hmac.compare_digest(mac, expected_mac):
raise ValueError("MAC mismatch")
key = content["private_key"]
crypt_sm4 = CryptSM4()
crypt_sm4.set_key(bytes(password, "utf-8"), SM4_DECRYPT)
key = base64.b64decode(bytes(key, "utf-8"))
key = str(crypt_sm4.crypt_cbc(self.cbc_iv, key), "utf-8")
self.from_key(key)