def test_update_not_allowed_after_settlement_period(
token_network,
create_channel,
channel_deposit,
get_accounts,
create_balance_proof,
create_balance_proof_update_signature,
web3,
):
""" updateNonClosingBalanceProof cannot be called after the settlement period. """
(A, B) = get_accounts(2)
settle_timeout = TEST_SETTLE_TIMEOUT_MIN
deposit_A = 20
channel_identifier = create_channel(A, B, settle_timeout)[0]
channel_deposit(channel_identifier, A, deposit_A, B)
balance_proof_A = create_balance_proof(channel_identifier, A, 10, 0, 5, fake_bytes(32, "02"))
balance_proof_B = create_balance_proof(channel_identifier, B, 5, 0, 3, fake_bytes(32, "02"))
balance_proof_update_signature_B = create_balance_proof_update_signature(
B, channel_identifier, *balance_proof_A
)
token_network.functions.closeChannel(
channel_identifier, B, *balance_proof_B
).call_and_transact({"from": A})
web3.testing.mine(settle_timeout + 1)
with pytest.raises(TransactionFailed):
token_network.functions.updateNonClosingBalanceProof(
channel_identifier, A, B, *balance_proof_A, balance_proof_update_signature_B
).call({"from": A})
def test_update_not_allowed_for_the_closing_address(
token_network,
create_channel,
channel_deposit,
get_accounts,
create_balance_proof,
create_balance_proof_update_signature,
):
""" Closing address cannot call updateNonClosingBalanceProof. """
(A, B, M) = get_accounts(3)
settle_timeout = TEST_SETTLE_TIMEOUT_MIN
deposit_A = 20
channel_identifier = create_channel(A, B, settle_timeout)[0]
channel_deposit(channel_identifier, A, deposit_A, B)
# Some balance proof from B
balance_proof_B_0 = create_balance_proof(channel_identifier, B, 5, 0, 3, fake_bytes(32, '02'))
# Later balance proof, higher transferred amount, higher nonce
balance_proof_B_1 = create_balance_proof(channel_identifier, B, 10, 0, 4, fake_bytes(32, '02'))
# B's signature on the update message is valid
balance_proof_update_signature_B = create_balance_proof_update_signature(
B,
channel_identifier,
*balance_proof_B_1,
)
# A closes with the first balance proof
token_network.functions.closeChannel(
channel_identifier,
B,
*balance_proof_B_0,
).transact({'from': A})
# Someone wants to update with later balance proof - not possible
with pytest.raises(TransactionFailed):
token_network.functions.updateNonClosingBalanceProof(
channel_identifier,
A,
B,
*balance_proof_B_1,
balance_proof_update_signature_B,
).transact({'from': A})
with pytest.raises(TransactionFailed):
token_network.functions.updateNonClosingBalanceProof(
channel_identifier,
A,
B,
*balance_proof_B_1,
balance_proof_update_signature_B,
).transact({'from': B})
with pytest.raises(TransactionFailed):
token_network.functions.updateNonClosingBalanceProof(
channel_identifier,
A,
B,
*balance_proof_B_1,
balance_proof_update_signature_B,
).transact({'from': M})
def test_update_not_allowed_after_settlement_period(
token_network: Contract,
create_channel: Callable,
channel_deposit: Callable,
get_accounts: Callable,
create_balance_proof: Callable,
create_balance_proof_countersignature: Callable,
web3: Web3,
) -> None:
""" updateNonClosingBalanceProof cannot be called after the settlement period. """
(A, B) = get_accounts(2)
settle_timeout = TEST_SETTLE_TIMEOUT_MIN
deposit_A = 20
channel_identifier = create_channel(A, B, settle_timeout)[0]
channel_deposit(channel_identifier, A, deposit_A, B)
balance_proof_A = create_balance_proof(channel_identifier, A, 10, 0, 5, fake_bytes(32, "02"))
balance_proof_B = create_balance_proof(channel_identifier, B, 5, 0, 3, fake_bytes(32, "02"))
closing_sig_A = create_balance_proof_countersignature(
A, channel_identifier, MessageTypeId.BALANCE_PROOF, *balance_proof_B
)
balance_proof_update_signature_B = create_balance_proof_countersignature(
B, channel_identifier, MessageTypeId.BALANCE_PROOF_UPDATE, *balance_proof_A
)
token_network.functions.closeChannel(
channel_identifier, B, A, *balance_proof_B, closing_sig_A
).call_and_transact({"from": A})
web3.testing.mine(settle_timeout + 1)
with pytest.raises(TransactionFailed):
token_network.functions.updateNonClosingBalanceProof(
channel_identifier, A, B, *balance_proof_A, balance_proof_update_signature_B
).call({"from": A})
def test_update_wrong_nonce_fail(
token_network: Contract,
create_channel: Callable,
channel_deposit: Callable,
get_accounts: Callable,
create_balance_proof: Callable,
create_balance_proof_update_signature: Callable,
update_state_tests: Callable,
) -> None:
(A, B, Delegate) = get_accounts(3)
settle_timeout = 6
deposit_A = 20
channel_identifier = create_channel(A, B, settle_timeout)[0]
channel_deposit(channel_identifier, A, deposit_A, B)
balance_proof_A = create_balance_proof(channel_identifier, A, 10, 0, 5, fake_bytes(32, "02"))
balance_proof_B = create_balance_proof(channel_identifier, B, 5, 0, 3, fake_bytes(32, "02"))
balance_proof_update_signature_B = create_balance_proof_update_signature(
B, channel_identifier, *balance_proof_A
)
txn_hash1 = token_network.functions.closeChannel(
channel_identifier, B, *balance_proof_B
).call_and_transact({"from": A})
token_network.functions.updateNonClosingBalanceProof(
channel_identifier, A, B, *balance_proof_A, balance_proof_update_signature_B
).call_and_transact({"from": Delegate})
# updateNonClosingBalanceProof should fail for the same nonce as provided previously
with pytest.raises(TransactionFailed):
token_network.functions.updateNonClosingBalanceProof(
channel_identifier, A, B, *balance_proof_A, balance_proof_update_signature_B
).call({"from": Delegate})
balance_proof_A_same_nonce = create_balance_proof(
channel_identifier, A, 12, 2, balance_proof_A[1], fake_bytes(32, "03")
)
with pytest.raises(TransactionFailed):
token_network.functions.updateNonClosingBalanceProof(
channel_identifier, A, B, *balance_proof_A_same_nonce, balance_proof_update_signature_B
).call({"from": Delegate})
balance_proof_A_lower_nonce = create_balance_proof(
channel_identifier, A, 10, 0, 4, fake_bytes(32, "02")
)
balance_proof_update_signature_B = create_balance_proof_update_signature(
B, channel_identifier, *balance_proof_A_lower_nonce
)
with pytest.raises(TransactionFailed):
token_network.functions.updateNonClosingBalanceProof(
channel_identifier,
A,
B,
*balance_proof_A_lower_nonce,
balance_proof_update_signature_B,
).call({"from": A})
update_state_tests(
channel_identifier, A, balance_proof_A, B, balance_proof_B, settle_timeout, txn_hash1
)
def common_settle_state_tests(
custom_token,
token_network,
channel_identifier,
A,
balance_A,
B,
balance_B,
pre_account_balance_A,
pre_account_balance_B,
pre_balance_contract,
):
# Make sure the correct amount of tokens has been transferred
account_balance_A = custom_token.functions.balanceOf(A).call()
account_balance_B = custom_token.functions.balanceOf(B).call()
balance_contract = custom_token.functions.balanceOf(token_network.address).call()
assert account_balance_A == pre_account_balance_A + balance_A
assert account_balance_B == pre_account_balance_B + balance_B
assert balance_contract == pre_balance_contract - balance_A - balance_B
# Make sure channel data has been removed
assert (
token_network.functions.participants_hash_to_channel_identifier(
get_participants_hash(A, B)
).call()
== 0
)
# Make sure participant data has been removed
(
A_deposit,
A_withdrawn,
A_is_the_closer,
A_balance_hash,
A_nonce,
_,
_,
) = token_network.functions.getChannelParticipantInfo(channel_identifier, A, B).call()
assert A_deposit == 0
assert A_withdrawn == 0
assert A_is_the_closer == 0
assert A_balance_hash == fake_bytes(32)
assert A_nonce == 0
(
B_deposit,
B_withdrawn,
B_is_the_closer,
B_balance_hash,
B_nonce,
_,
_,
) = token_network.functions.getChannelParticipantInfo(channel_identifier, B, A).call()
assert B_deposit == 0
assert B_withdrawn == 0
assert B_is_the_closer == 0
assert B_balance_hash == fake_bytes(32)
assert B_nonce == 0
def get(
channel_identifier: int,
participant1: HexAddress,
participant1_values: ChannelValues,
participant2: HexAddress,
participant2_values: ChannelValues,
) -> None:
nonce1 = 5
nonce2 = 7
additional_hash1 = fake_bytes(32)
additional_hash2 = fake_bytes(32)
balance_proof_1 = create_balance_proof(
channel_identifier,
participant1,
participant1_values.transferred,
participant1_values.locked_amounts.locked,
nonce1,
participant1_values.locksroot,
additional_hash1,
)
balance_proof_2 = create_balance_proof(
channel_identifier,
participant2,
participant2_values.transferred,
participant2_values.locked_amounts.locked,
nonce2,
participant2_values.locksroot,
additional_hash2,
)
balance_proof_close_signature_1 = create_balance_proof_countersignature(
participant=participant1,
channel_identifier=channel_identifier,
msg_type=MessageTypeId.BALANCE_PROOF,
**balance_proof_2._asdict(),
)
balance_proof_update_signature_2 = create_balance_proof_countersignature(
participant=participant2,
channel_identifier=channel_identifier,
msg_type=MessageTypeId.BALANCE_PROOF_UPDATE,
**balance_proof_1._asdict(),
)
token_network.functions.closeChannel(
channel_identifier,
participant2,
participant1,
*balance_proof_2._asdict().values(),
balance_proof_close_signature_1,
).call_and_transact({"from": participant1})
token_network.functions.updateNonClosingBalanceProof(
channel_identifier,
participant1,
participant2,
*balance_proof_1._asdict().values(),
balance_proof_update_signature_2,
).call_and_transact({"from": participant2})
def test_update_channel_state(
web3: Web3,
custom_token: Contract,
token_network: Contract,
create_channel: Callable,
channel_deposit: Callable,
get_accounts: Callable,
create_balance_proof: Callable,
create_balance_proof_countersignature: Callable,
update_state_tests: Callable,
txn_cost: Callable,
) -> None:
""" A successful updateNonClosingBalanceProof() call should not change token/ETH balances """
(A, B, Delegate) = get_accounts(3)
settle_timeout = 6
deposit_A = 20
channel_identifier = create_channel(A, B, settle_timeout)[0]
channel_deposit(channel_identifier, A, deposit_A, B)
balance_proof_A = create_balance_proof(channel_identifier, A, 10, 0, 5, fake_bytes(32, "02"))
balance_proof_B = create_balance_proof(channel_identifier, B, 5, 0, 3, fake_bytes(32, "02"))
closing_sig_A = create_balance_proof_countersignature(
A, channel_identifier, MessageTypeId.BALANCE_PROOF, *balance_proof_B
)
balance_proof_update_signature_B = create_balance_proof_countersignature(
B, channel_identifier, MessageTypeId.BALANCE_PROOF_UPDATE, *balance_proof_A
)
txn_hash1 = token_network.functions.closeChannel(
channel_identifier, B, A, *balance_proof_B, closing_sig_A
).call_and_transact({"from": A})
pre_eth_balance_A = web3.eth.getBalance(A)
pre_eth_balance_B = web3.eth.getBalance(B)
pre_eth_balance_delegate = web3.eth.getBalance(Delegate)
pre_eth_balance_contract = web3.eth.getBalance(token_network.address)
pre_balance_A = custom_token.functions.balanceOf(A).call()
pre_balance_B = custom_token.functions.balanceOf(B).call()
pre_balance_delegate = custom_token.functions.balanceOf(Delegate).call()
pre_balance_contract = custom_token.functions.balanceOf(token_network.address).call()
txn_hash = token_network.functions.updateNonClosingBalanceProof(
channel_identifier, A, B, *balance_proof_A, balance_proof_update_signature_B
).call_and_transact({"from": Delegate})
# Test that no balances have changed.
# There are no transfers to be made in updateNonClosingBalanceProof.
assert web3.eth.getBalance(A) == pre_eth_balance_A
assert web3.eth.getBalance(B) == pre_eth_balance_B
assert web3.eth.getBalance(Delegate) == pre_eth_balance_delegate - txn_cost(txn_hash)
assert web3.eth.getBalance(token_network.address) == pre_eth_balance_contract
assert custom_token.functions.balanceOf(A).call() == pre_balance_A
assert custom_token.functions.balanceOf(B).call() == pre_balance_B
assert custom_token.functions.balanceOf(Delegate).call() == pre_balance_delegate
assert custom_token.functions.balanceOf(token_network.address).call() == pre_balance_contract
update_state_tests(
channel_identifier, A, balance_proof_A, B, balance_proof_B, settle_timeout, txn_hash1
)
def test_settle_timeout_inrange(
token_network: Contract,
get_accounts: Callable,
web3: Web3,
create_close_signature_for_no_balance_proof: Callable,
) -> None:
""" The TokenNetwork constructor must enforce that settle timeout is in
the valid range.
Also asserts that the constants.py and the netting channel contract values
are synched.
"""
(A, B) = get_accounts(2)
small_settle_timeout = TEST_SETTLE_TIMEOUT_MIN - 1
large_settle_timeout = TEST_SETTLE_TIMEOUT_MAX + 1
with pytest.raises(TransactionFailed):
token_network.functions.openChannel(A, B, small_settle_timeout).call()
with pytest.raises(TransactionFailed):
token_network.functions.openChannel(A, B, large_settle_timeout).call()
token_network.functions.openChannel(A, B, TEST_SETTLE_TIMEOUT_MIN).call_and_transact()
channel_identifier = token_network.functions.getChannelIdentifier(A, B).call()
(settle_block_number, _) = token_network.functions.getChannelInfo(
channel_identifier, A, B
).call()
assert settle_block_number == TEST_SETTLE_TIMEOUT_MIN
closing_sig = create_close_signature_for_no_balance_proof(A, channel_identifier)
token_network.functions.closeChannel(
channel_identifier=channel_identifier,
non_closing_participant=B,
closing_participant=A,
balance_hash=fake_bytes(32),
nonce=0,
additional_hash=fake_bytes(32),
non_closing_signature=fake_bytes(65),
closing_signature=closing_sig,
).call_and_transact({"from": A})
web3.testing.mine(TEST_SETTLE_TIMEOUT_MIN + 1)
token_network.functions.settleChannel(
channel_identifier, A, 0, 0, LOCKSROOT_OF_NO_LOCKS, B, 0, 0, LOCKSROOT_OF_NO_LOCKS
).call_and_transact({"from": A})
token_network.functions.openChannel(A, B, TEST_SETTLE_TIMEOUT_MAX).call_and_transact()
channel_identifier = token_network.functions.getChannelIdentifier(A, B).call()
(settle_block_number, _) = token_network.functions.getChannelInfo(
channel_identifier, A, B
).call()
assert settle_block_number == TEST_SETTLE_TIMEOUT_MAX
def test_update_wrong_signatures(
token_network: Contract,
create_channel: Callable,
channel_deposit: Callable,
get_accounts: Callable,
create_balance_proof: Callable,
create_balance_proof_countersignature: Callable,
create_close_signature_for_no_balance_proof: Callable,
) -> None:
""" updateNonClosingBalanceProof() should fail with wrong signatures """
(A, B, C) = get_accounts(3)
channel_identifier = create_channel(A, B)[0]
channel_deposit(channel_identifier, A, 25, B)
balance_proof_A = create_balance_proof(channel_identifier, A, 10, 0, 5, fake_bytes(32, "02"))
balance_proof_A_fake = create_balance_proof(
channel_identifier, A, 10, 0, 5, fake_bytes(32, "02"), signer=C
)
balance_proof_update_signature_B = create_balance_proof_countersignature(
B, channel_identifier, MessageTypeId.BALANCE_PROOF_UPDATE, *balance_proof_A
)
balance_proof_update_signature_B_fake = create_balance_proof_countersignature(
C, channel_identifier, MessageTypeId.BALANCE_PROOF_UPDATE, *balance_proof_A
)
# Close the channel so updateNonClosingBalanceProof() is possible
closing_sig = create_close_signature_for_no_balance_proof(A, channel_identifier)
token_network.functions.closeChannel(
channel_identifier,
B,
A,
EMPTY_BALANCE_HASH,
0,
EMPTY_ADDITIONAL_HASH,
EMPTY_SIGNATURE,
closing_sig,
).call_and_transact({"from": A})
with pytest.raises(TransactionFailed):
token_network.functions.updateNonClosingBalanceProof(
channel_identifier, A, B, *balance_proof_A_fake, balance_proof_update_signature_B
).call({"from": C})
with pytest.raises(TransactionFailed):
token_network.functions.updateNonClosingBalanceProof(
channel_identifier, A, B, *balance_proof_A, balance_proof_update_signature_B_fake
).call({"from": C})
# See a success to make sure that the above failures are not spurious
token_network.functions.updateNonClosingBalanceProof(
channel_identifier, A, B, *balance_proof_A, balance_proof_update_signature_B
).call_and_transact({"from": C})
def get(
channel_identifier,
participant1,
participant1_values,
participant2,
participant2_values,
):
nonce1 = 5
nonce2 = 7
additional_hash1 = fake_bytes(32)
additional_hash2 = fake_bytes(32)
balance_proof_1 = create_balance_proof(
channel_identifier,
participant1,
participant1_values.transferred,
participant1_values.locked,
nonce1,
participant1_values.locksroot,
additional_hash1,
)
balance_proof_2 = create_balance_proof(
channel_identifier,
participant2,
participant2_values.transferred,
participant2_values.locked,
nonce2,
participant2_values.locksroot,
additional_hash2,
)
balance_proof_update_signature_2 = create_balance_proof_update_signature(
participant2,
channel_identifier,
*balance_proof_1,
)
token_network.functions.closeChannel(
channel_identifier,
participant2,
*balance_proof_2,
).transact({'from': participant1})
token_network.functions.updateNonClosingBalanceProof(
channel_identifier,
participant1,
participant2,
*balance_proof_1,
balance_proof_update_signature_2,
).transact({'from': participant2})
def test_update_notclosed_fail(
get_accounts: Callable,
token_network: Contract,
create_channel: Callable,
channel_deposit: Callable,
create_balance_proof: Callable,
create_balance_proof_countersignature: Callable,
) -> None:
""" updateNonClosingBalanceProof() on an Opened channel should fail """
(A, B, C) = get_accounts(3)
channel_identifier = create_channel(A, B)[0]
channel_deposit(channel_identifier, A, 25, B)
balance_proof_A = create_balance_proof(channel_identifier, A, 10, 0, 5, fake_bytes(32, "02"))
balance_proof_update_signature_B = create_balance_proof_countersignature(
B, channel_identifier, MessageTypeId.BALANCE_PROOF_UPDATE, *balance_proof_A
)
(settle_block_number, state) = token_network.functions.getChannelInfo(
channel_identifier, A, B
).call()
assert settle_block_number > 0
assert state == ChannelState.OPENED
with pytest.raises(TransactionFailed):
token_network.functions.updateNonClosingBalanceProof(
channel_identifier, A, B, *balance_proof_A, balance_proof_update_signature_B
).call({"from": C})
def test_close_wrong_signature(
token_network,
create_channel,
channel_deposit,
get_accounts,
create_balance_proof,
):
""" Closing a channel with a balance proof of the third party should fail """
(A, B, C) = get_accounts(3)
deposit_A = 6
transferred_amount = 5
nonce = 3
locksroot = fake_bytes(32, '03')
channel_identifier = create_channel(A, B)[0]
channel_deposit(channel_identifier, A, deposit_A, B)
# Create balance proofs
balance_proof = create_balance_proof(
channel_identifier,
C,
transferred_amount,
0,
nonce,
locksroot,
)
with pytest.raises(TransactionFailed):
token_network.functions.closeChannel(
channel_identifier,
B,
*balance_proof,
).transact({'from': A})
def test_recover_address_from_cooperative_settle_signature(
token_network_test_signatures, create_cooperative_settle_signatures,
get_accounts):
(A, B) = get_accounts(2)
other_token_network = token_network_test_signatures
channel_identifier = 4
fake_signature = fake_bytes(64)
(signature_A, signature_B) = create_cooperative_settle_signatures(
[A, B],
channel_identifier,
A,
0,
B,
0,
other_token_network=other_token_network)
assert (A == other_token_network.functions.
recoverAddressFromCooperativeSettleSignaturePublic(
channel_identifier, A, 0, B, 0, signature_A).call())
assert (B == other_token_network.functions.
recoverAddressFromCooperativeSettleSignaturePublic(
channel_identifier, A, 0, B, 0, signature_B).call())
assert (B != other_token_network.functions.
recoverAddressFromCooperativeSettleSignaturePublic(
channel_identifier, A, 0, B, 0, signature_A).call())
assert (A != other_token_network.functions.
recoverAddressFromCooperativeSettleSignaturePublic(
channel_identifier, A, 0, B, 0, signature_B).call())
with pytest.raises(TransactionFailed):
other_token_network.functions.recoverAddressFromCooperativeSettleSignaturePublic(
channel_identifier, A, 0, B, 0, fake_signature).call()
def test_update_nonexistent_fail(
get_accounts: Callable,
token_network: Contract,
create_balance_proof: Callable,
create_balance_proof_update_signature: Callable,
) -> None:
""" updateNonClosingBalanceProof() on a not-yet openned channel should fail """
(A, B, C) = get_accounts(3)
channel_identifier = 1
(settle_block_number, state) = token_network.functions.getChannelInfo(
channel_identifier, A, B
).call()
assert settle_block_number == 0
assert state == ChannelState.NONEXISTENT
balance_proof_A = create_balance_proof(channel_identifier, A, 10, 0, 5, fake_bytes(32, "02"))
balance_proof_update_signature_B = create_balance_proof_update_signature(
B, channel_identifier, *balance_proof_A
)
with pytest.raises(TransactionFailed):
token_network.functions.updateNonClosingBalanceProof(
channel_identifier, A, B, *balance_proof_A, balance_proof_update_signature_B
).call({"from": C})
def test_close_wrong_signature(
token_network: Contract,
create_channel: Callable,
channel_deposit: Callable,
get_accounts: Callable,
create_balance_proof: Callable,
create_balance_proof_countersignature: Callable,
) -> None:
""" Closing a channel with a balance proof of the third party should fail """
(A, B, C) = get_accounts(3)
deposit_A = 6
transferred_amount = 5
nonce = 3
locksroot = fake_bytes(32, "03")
channel_identifier = create_channel(A, B)[0]
channel_deposit(channel_identifier, A, deposit_A, B)
# Create balance proofs
balance_proof = create_balance_proof(channel_identifier, C,
transferred_amount, 0, nonce,
locksroot)
closing_signature_A = create_balance_proof_countersignature(
A, channel_identifier, MessageTypeId.BALANCE_PROOF, *balance_proof)
with pytest.raises(TransactionFailed):
token_network.functions.closeChannel(
channel_identifier, B, A, *balance_proof,
closing_signature_A).call({"from": A})
def test_update_notclosed_fail(
get_accounts,
token_network,
create_channel,
channel_deposit,
create_balance_proof,
create_balance_proof_update_signature,
):
""" updateNonClosingBalanceProof() on an Opened channel should fail """
(A, B, C) = get_accounts(3)
channel_identifier = create_channel(A, B)[0]
channel_deposit(channel_identifier, A, 25, B)
balance_proof_A = create_balance_proof(channel_identifier, A, 10, 0, 5, fake_bytes(32, '02'))
balance_proof_update_signature_B = create_balance_proof_update_signature(
B,
channel_identifier,
*balance_proof_A,
)
(
settle_block_number,
state,
) = token_network.functions.getChannelInfo(channel_identifier, A, B).call()
assert settle_block_number > 0
assert state == ChannelState.OPENED
with pytest.raises(TransactionFailed):
token_network.functions.updateNonClosingBalanceProof(
channel_identifier,
A,
B,
*balance_proof_A,
balance_proof_update_signature_B,
).transact({'from': C})
def test_update_nonexistent_fail(
get_accounts: Callable,
token_network: Contract,
create_balance_proof: Callable,
create_balance_proof_countersignature: Callable,
) -> None:
"""updateNonClosingBalanceProof() on a not-yet openned channel should fail"""
(A, B, C) = get_accounts(3)
channel_identifier = 1
(settle_block_number,
state) = token_network.functions.getChannelInfo(channel_identifier, A,
B).call()
assert settle_block_number == 0
assert state == ChannelState.NONEXISTENT
balance_proof_A = create_balance_proof(channel_identifier, A, 10, 0, 5,
fake_bytes(32, "02"))
balance_proof_update_signature_B = create_balance_proof_countersignature(
participant=B,
channel_identifier=channel_identifier,
msg_type=MessageTypeId.BALANCE_PROOF_UPDATE,
**balance_proof_A._asdict(),
)
with pytest.raises(TransactionFailed,
match="TN/update: channel id mismatch"):
token_network.functions.updateNonClosingBalanceProof(
channel_identifier,
A,
B,
*balance_proof_A._asdict().values(),
balance_proof_update_signature_B,
).call({"from": C})
def test_update_not_allowed_for_the_closing_address(
token_network: Contract,
create_channel: Callable,
channel_deposit: Callable,
get_accounts: Callable,
create_balance_proof: Callable,
create_balance_proof_countersignature: Callable,
) -> None:
""" Closing address cannot call updateNonClosingBalanceProof. """
(A, B, M) = get_accounts(3)
settle_timeout = TEST_SETTLE_TIMEOUT_MIN
deposit_A = 20
channel_identifier = create_channel(A, B, settle_timeout)[0]
channel_deposit(channel_identifier, A, deposit_A, B)
# Some balance proof from B
balance_proof_B_0 = create_balance_proof(channel_identifier, B, 5, 0, 3, fake_bytes(32, "02"))
closing_sig_A_0 = create_balance_proof_countersignature(
A, channel_identifier, MessageTypeId.BALANCE_PROOF, *balance_proof_B_0
)
# Later balance proof, higher transferred amount, higher nonce
balance_proof_B_1 = create_balance_proof(channel_identifier, B, 10, 0, 4, fake_bytes(32, "02"))
# B's signature on the update message is valid
balance_proof_update_signature_B = create_balance_proof_countersignature(
B, channel_identifier, MessageTypeId.BALANCE_PROOF_UPDATE, *balance_proof_B_1
)
# A closes with the first balance proof
token_network.functions.closeChannel(
channel_identifier, B, A, *balance_proof_B_0, closing_sig_A_0
).call_and_transact({"from": A})
# Someone wants to update with later balance proof - not possible
with pytest.raises(TransactionFailed):
token_network.functions.updateNonClosingBalanceProof(
channel_identifier, A, B, *balance_proof_B_1, balance_proof_update_signature_B
).call({"from": A})
with pytest.raises(TransactionFailed):
token_network.functions.updateNonClosingBalanceProof(
channel_identifier, A, B, *balance_proof_B_1, balance_proof_update_signature_B
).call({"from": B})
with pytest.raises(TransactionFailed):
token_network.functions.updateNonClosingBalanceProof(
channel_identifier, A, B, *balance_proof_B_1, balance_proof_update_signature_B
).call({"from": M})
def test_recover_address_from_withdraw_message(
token_network_test_signatures: Contract,
create_withdraw_signatures: Callable,
create_channel_and_deposit: Callable,
get_accounts: Callable,
) -> None:
(A, B) = get_accounts(2)
token_network = token_network_test_signatures
fake_signature = fake_bytes(64)
deposit_A = 5
deposit_B = 7
withdraw_A = 3
expiration_block = 492889
channel_identifier = create_channel_and_deposit(A, B, deposit_A, deposit_B)
(signature_A, signature_B) = create_withdraw_signatures(
[A, B],
channel_identifier,
A,
withdraw_A,
expiration_block,
token_network.address,
)
recovered_address_A = token_network.functions.recoverAddressFromWithdrawMessagePublic(
channel_identifier, A, withdraw_A, expiration_block,
signature_A).call()
assert recovered_address_A == A
recovered_address_B = token_network.functions.recoverAddressFromWithdrawMessagePublic(
channel_identifier, A, withdraw_A, expiration_block,
signature_B).call()
assert recovered_address_B == B
with pytest.raises(TransactionFailed):
token_network.functions.recoverAddressFromWithdrawMessagePublic(
channel_identifier, A, withdraw_A, expiration_block,
fake_signature).call()
wrong_participant = token_network.functions.recoverAddressFromWithdrawMessagePublic(
channel_identifier, B, withdraw_A, expiration_block,
signature_A).call()
assert recovered_address_A != wrong_participant
wrong_withdraw_value = token_network.functions.recoverAddressFromWithdrawMessagePublic(
channel_identifier, A, 1, expiration_block, signature_A).call()
assert recovered_address_A != wrong_withdraw_value
wrong_signature = token_network.functions.recoverAddressFromWithdrawMessagePublic(
channel_identifier, A, withdraw_A, expiration_block,
signature_B).call()
assert recovered_address_A != wrong_signature
wrong_expiration = token_network.functions.recoverAddressFromWithdrawMessagePublic(
channel_identifier, A, withdraw_A, expiration_block + 3,
signature_B).call()
assert recovered_address_A != wrong_expiration
def test_settle_timeout_inrange(token_network, get_accounts, web3):
""" The TokenNetwork constructor must enforce that settle timeout is in
the valid range.
Also asserts that the constants.py and the netting channel contract values
are synched.
"""
(A, B) = get_accounts(2)
small_settle_timeout = TEST_SETTLE_TIMEOUT_MIN - 1
large_settle_timeout = TEST_SETTLE_TIMEOUT_MAX + 1
with pytest.raises(TransactionFailed):
token_network.functions.openChannel(A, B, small_settle_timeout).call()
with pytest.raises(TransactionFailed):
token_network.functions.openChannel(A, B, large_settle_timeout).call()
token_network.functions.openChannel(
A, B, TEST_SETTLE_TIMEOUT_MIN).call_and_transact()
channel_identifier = token_network.functions.getChannelIdentifier(
A, B).call()
(settle_block_number,
_) = token_network.functions.getChannelInfo(channel_identifier, A,
B).call()
assert settle_block_number == TEST_SETTLE_TIMEOUT_MIN
token_network.functions.closeChannel(channel_identifier, B,
fake_bytes(32), 0, fake_bytes(32),
fake_bytes(64)).call_and_transact(
{"from": A})
web3.testing.mine(TEST_SETTLE_TIMEOUT_MIN + 1)
token_network.functions.settleChannel(channel_identifier, A, 0, 0,
fake_bytes(32), B, 0, 0,
fake_bytes(32)).call_and_transact(
{"from": A})
token_network.functions.openChannel(
A, B, TEST_SETTLE_TIMEOUT_MAX).call_and_transact()
channel_identifier = token_network.functions.getChannelIdentifier(
A, B).call()
(settle_block_number,
_) = token_network.functions.getChannelInfo(channel_identifier, A,
B).call()
assert settle_block_number == TEST_SETTLE_TIMEOUT_MAX
def test_update_allowed_after_settlement_period(
token_network: Contract,
create_channel: Callable,
channel_deposit: Callable,
get_accounts: Callable,
create_balance_proof: Callable,
create_balance_proof_countersignature: Callable,
web3: Web3,
) -> None:
"""updateNonClosingBalanceProof can be called after the settlement period."""
(A, B) = get_accounts(2)
settle_timeout = TEST_SETTLE_TIMEOUT_MIN
deposit_A = 20
channel_identifier = create_channel(A, B, settle_timeout)[0]
channel_deposit(channel_identifier, A, deposit_A, B)
balance_proof_A = create_balance_proof(channel_identifier, A, 10, 0, 5,
fake_bytes(32, "02"))
balance_proof_B = create_balance_proof(channel_identifier, B, 5, 0, 3,
fake_bytes(32, "02"))
closing_sig_A = create_balance_proof_countersignature(
participant=A,
channel_identifier=channel_identifier,
msg_type=MessageTypeId.BALANCE_PROOF,
**balance_proof_B._asdict(),
)
balance_proof_update_signature_B = create_balance_proof_countersignature(
participant=B,
channel_identifier=channel_identifier,
msg_type=MessageTypeId.BALANCE_PROOF_UPDATE,
**balance_proof_A._asdict(),
)
call_and_transact(
token_network.functions.closeChannel(
channel_identifier, B, A,
*balance_proof_B._asdict().values(), closing_sig_A),
{"from": A},
)
mine_blocks(web3, settle_timeout + 1)
token_network.functions.updateNonClosingBalanceProof(
channel_identifier,
A,
B,
*balance_proof_A._asdict().values(),
balance_proof_update_signature_B,
).call({"from": A})
def get(
channel_identifier: int,
participant1: HexAddress,
participant1_values: ChannelValues,
participant2: HexAddress,
participant2_values: ChannelValues,
) -> None:
nonce1 = 5
nonce2 = 7
additional_hash1 = fake_bytes(32)
additional_hash2 = fake_bytes(32)
balance_proof_1 = create_balance_proof(
channel_identifier,
participant1,
participant1_values.transferred,
participant1_values.locked_amounts.locked,
nonce1,
participant1_values.locksroot,
additional_hash1,
)
balance_proof_2 = create_balance_proof(
channel_identifier,
participant2,
participant2_values.transferred,
participant2_values.locked_amounts.locked,
nonce2,
participant2_values.locksroot,
additional_hash2,
)
balance_proof_update_signature_2 = create_balance_proof_update_signature(
participant2, channel_identifier, *balance_proof_1)
token_network.functions.closeChannel(
channel_identifier, participant2,
*balance_proof_2).call_and_transact({"from": participant1})
token_network.functions.updateNonClosingBalanceProof(
channel_identifier,
participant1,
participant2,
*balance_proof_1,
balance_proof_update_signature_2,
).call_and_transact({"from": participant2})
def test_update_wrong_signatures(
token_network,
create_channel,
channel_deposit,
get_accounts,
create_balance_proof,
create_balance_proof_update_signature,
):
""" updateNonClosingBalanceProof() should fail with wrong signatures """
(A, B, C) = get_accounts(3)
channel_identifier = create_channel(A, B)[0]
channel_deposit(channel_identifier, A, 25, B)
balance_proof_A = create_balance_proof(channel_identifier, A, 10, 0, 5, fake_bytes(32, "02"))
balance_proof_A_fake = create_balance_proof(
channel_identifier, A, 10, 0, 5, fake_bytes(32, "02"), signer=C
)
balance_proof_update_signature_B = create_balance_proof_update_signature(
B, channel_identifier, *balance_proof_A
)
balance_proof_update_signature_B_fake = create_balance_proof_update_signature(
C, channel_identifier, *balance_proof_A
)
# Close the channel so updateNonClosingBalanceProof() is possible
token_network.functions.closeChannel(
channel_identifier, B, EMPTY_BALANCE_HASH, 0, EMPTY_ADDITIONAL_HASH, EMPTY_SIGNATURE
).call_and_transact({"from": A})
with pytest.raises(TransactionFailed):
token_network.functions.updateNonClosingBalanceProof(
channel_identifier, A, B, *balance_proof_A_fake, balance_proof_update_signature_B
).call({"from": C})
with pytest.raises(TransactionFailed):
token_network.functions.updateNonClosingBalanceProof(
channel_identifier, A, B, *balance_proof_A, balance_proof_update_signature_B_fake
).call({"from": C})
# See a success to make sure that the above failures are not spurious
token_network.functions.updateNonClosingBalanceProof(
channel_identifier, A, B, *balance_proof_A, balance_proof_update_signature_B
).call_and_transact({"from": C})
def test_channel_unlock_unregistered_locks(
web3,
token_network,
get_accounts,
create_channel_and_deposit,
withdraw_channel,
close_and_update_channel,
custom_token,
):
""" unlock() should refund tokens locked by secrets not registered before settlement """
(A, B) = get_accounts(2)
settle_timeout = TEST_SETTLE_TIMEOUT_MIN
pending_transfers_tree = get_pending_transfers_tree(
web3, [1, 3, 5], [2, 4], settle_timeout)
locked_A = pending_transfers_tree.locked_amount
(vals_A, vals_B) = (
ChannelValues(
deposit=35,
withdrawn=10,
transferred=0,
locked_amounts=LockedAmounts(claimable_locked=locked_A),
),
ChannelValues(deposit=40, withdrawn=10, transferred=20),
)
vals_A.locksroot = "0x" + get_merkle_root(
pending_transfers_tree.merkle_tree).hex()
vals_B.locksroot = fake_bytes(32, "03")
channel_identifier = create_channel_and_deposit(A, B, vals_A.deposit,
vals_B.deposit)
withdraw_channel(channel_identifier, A, vals_A.withdrawn, B)
withdraw_channel(channel_identifier, B, vals_B.withdrawn, A)
close_and_update_channel(channel_identifier, A, vals_A, B, vals_B)
# Secret hasn't been registered before settlement timeout
web3.testing.mine(TEST_SETTLE_TIMEOUT_MIN + 1)
call_settle(token_network, channel_identifier, A, vals_A, B, vals_B)
# Someone unlocks A's pending transfers - all tokens should be refunded
token_network.functions.unlock(
channel_identifier, B, A,
pending_transfers_tree.packed_transfers).call_and_transact({"from": A})
# A gets back locked tokens
assert (custom_token.functions.balanceOf(A).call() == vals_A.deposit -
vals_A.transferred + vals_B.transferred)
def test_recover_address_from_withdraw_message(
token_network_test_signatures,
create_withdraw_signatures,
create_channel_and_deposit,
get_accounts,
):
(A, B) = get_accounts(2)
token_network = token_network_test_signatures
fake_signature = fake_bytes(64)
deposit_A = 5
deposit_B = 7
withdraw_A = 3
channel_identifier = create_channel_and_deposit(A, B, deposit_A, deposit_B)
(signature_A,
signature_B) = create_withdraw_signatures([A, B], channel_identifier, A,
withdraw_A,
token_network.address)
recovered_address_A = token_network.functions.recoverAddressFromWithdrawMessagePublic(
channel_identifier, A, withdraw_A, signature_A).call()
assert recovered_address_A == A
recovered_address_B = token_network.functions.recoverAddressFromWithdrawMessagePublic(
channel_identifier, A, withdraw_A, signature_B).call()
assert recovered_address_B == B
with pytest.raises(TransactionFailed):
token_network.functions.recoverAddressFromWithdrawMessagePublic(
channel_identifier, A, withdraw_A, fake_signature).call()
wrong_participant = token_network.functions.recoverAddressFromWithdrawMessagePublic(
channel_identifier, B, withdraw_A, signature_A).call()
assert recovered_address_A != wrong_participant
wrong_withdraw_value = token_network.functions.recoverAddressFromWithdrawMessagePublic(
channel_identifier, A, 1, signature_A).call()
assert recovered_address_A != wrong_withdraw_value
wrong_signature = token_network.functions.recoverAddressFromWithdrawMessagePublic(
channel_identifier, A, withdraw_A, signature_B).call()
assert recovered_address_A != wrong_signature
def get(
channel_identifier: int,
participant: HexAddress,
deposit_participant: int,
total_withdrawn_participant: int,
pre_withdrawn_participant: int,
pre_balance_participant: int,
partner: HexAddress,
deposit_partner: HexAddress,
total_withdrawn_partner: int,
pre_balance_partner: int,
pre_balance_contract: int,
delegate: Optional[HexAddress] = None,
) -> None:
current_withdrawn_participant = total_withdrawn_participant - pre_withdrawn_participant
(_, state) = token_network.functions.getChannelInfo(
channel_identifier, participant, partner).call()
assert state == ChannelState.OPENED
(
deposit,
withdrawn_amount,
is_the_closer,
balance_hash,
nonce,
locksroot,
locked_amount,
) = token_network.functions.getChannelParticipantInfo(
channel_identifier, participant, partner).call()
assert deposit == deposit_participant
assert withdrawn_amount == total_withdrawn_participant
assert is_the_closer is False
assert balance_hash == fake_bytes(32)
assert nonce == 0
assert locksroot == NONEXISTENT_LOCKSROOT
assert locked_amount == 0
(
deposit,
withdrawn_amount,
is_the_closer,
balance_hash,
nonce,
locksroot,
locked_amount,
) = token_network.functions.getChannelParticipantInfo(
channel_identifier, partner, participant).call()
assert deposit == deposit_partner
assert withdrawn_amount == total_withdrawn_partner
assert is_the_closer is False
assert balance_hash == fake_bytes(32)
assert nonce == 0
assert locksroot == NONEXISTENT_LOCKSROOT
assert locked_amount == 0
balance_participant = custom_token.functions.balanceOf(
participant).call()
balance_partner = custom_token.functions.balanceOf(partner).call()
balance_contract = custom_token.functions.balanceOf(
token_network.address).call()
assert balance_participant == pre_balance_participant + current_withdrawn_participant
assert balance_partner == pre_balance_partner
assert balance_contract == pre_balance_contract - current_withdrawn_participant
if delegate is not None:
balance_delegate = custom_token.functions.balanceOf(
delegate).call()
assert balance_delegate == balance_delegate
def test_settle_wrong_balance_hash(
web3: Web3,
get_accounts: Callable,
token_network: Contract,
create_channel_and_deposit: Callable,
close_and_update_channel: Callable,
reveal_secrets: Callable,
) -> None:
"""Calling settleChannel() with various wrong arguments and see failures"""
(A, B) = get_accounts(2)
vals_A = ChannelValues(
deposit=35,
withdrawn=0,
transferred=5,
locked_amounts=LockedAmounts(claimable_locked=10,
unclaimable_locked=2),
)
vals_B = ChannelValues(
deposit=40,
withdrawn=0,
transferred=15,
locked_amounts=LockedAmounts(claimable_locked=5, unclaimable_locked=4),
)
channel_identifier = create_channel_and_deposit(A, B, vals_A.deposit,
vals_B.deposit)
# Mock pending transfers data for A -> B
pending_transfers_tree_A = get_pending_transfers_tree_with_generated_lists(
web3,
unlockable_amount=vals_A.locked_amounts.claimable_locked,
expired_amount=vals_A.locked_amounts.unclaimable_locked,
)
vals_A.locksroot = pending_transfers_tree_A.hash_of_packed_transfers
# Reveal A's secrets.
reveal_secrets(A, pending_transfers_tree_A.unlockable)
# Mock pending transfers data for B -> A
pending_transfers_tree_B = get_pending_transfers_tree_with_generated_lists(
web3,
unlockable_amount=vals_B.locked_amounts.claimable_locked,
expired_amount=vals_B.locked_amounts.unclaimable_locked,
)
vals_B.locksroot = pending_transfers_tree_B.hash_of_packed_transfers
# Reveal B's secrets
reveal_secrets(B, pending_transfers_tree_B.unlockable)
close_and_update_channel(channel_identifier, A, vals_A, B, vals_B)
mine_blocks(web3, TEST_SETTLE_TIMEOUT_MIN + 1)
with pytest.raises(TransactionFailed):
call_settle(token_network, channel_identifier, B, vals_A, A, vals_B)
vals_A_fail = deepcopy(vals_A)
vals_A_fail.transferred += 1
with pytest.raises(TransactionFailed):
call_settle(token_network, channel_identifier, A, vals_A_fail, B,
vals_B)
vals_A_fail.transferred = 0
with pytest.raises(TransactionFailed):
call_settle(token_network, channel_identifier, A, vals_A_fail, B,
vals_B)
vals_A_fail.transferred = UINT256_MAX
with pytest.raises(TransactionFailed):
call_settle(token_network, channel_identifier, B, vals_B, A,
vals_A_fail)
vals_A_fail = deepcopy(vals_A)
vals_A_fail.locked_amounts.claimable_locked += 1
with pytest.raises(TransactionFailed):
call_settle(token_network, channel_identifier, A, vals_A_fail, B,
vals_B)
vals_A_fail.locked_amounts.claimable_locked = 0
with pytest.raises(TransactionFailed):
call_settle(token_network, channel_identifier, A, vals_A_fail, B,
vals_B)
vals_A_fail.locked_amounts.unclaimable_locked = 0
vals_A_fail.locked_amounts.claimable_locked = UINT256_MAX
with pytest.raises(TransactionFailed):
call_settle(token_network, channel_identifier, B, vals_B, A,
vals_A_fail)
vals_A_fail = deepcopy(vals_A)
vals_A_fail.locksroot = LOCKSROOT_OF_NO_LOCKS
with pytest.raises(TransactionFailed):
call_settle(token_network, channel_identifier, A, vals_A_fail, B,
vals_B)
vals_A_fail.locksroot = fake_bytes(32, "01")
with pytest.raises(TransactionFailed):
call_settle(token_network, channel_identifier, A, vals_A_fail, B,
vals_B)
vals_B_fail = deepcopy(vals_B)
vals_B_fail.transferred += 1
with pytest.raises(TransactionFailed):
call_settle(token_network, channel_identifier, A, vals_A, B,
vals_B_fail)
vals_B_fail.transferred = 0
with pytest.raises(TransactionFailed):
call_settle(token_network, channel_identifier, B, vals_B_fail, A,
vals_A)
vals_B_fail.transferred = UINT256_MAX
with pytest.raises(TransactionFailed):
call_settle(token_network, channel_identifier, A, vals_A, B,
vals_B_fail)
vals_B_fail = deepcopy(vals_B)
vals_B_fail.locked_amounts.claimable_locked += 1
with pytest.raises(TransactionFailed):
call_settle(token_network, channel_identifier, A, vals_A, B,
vals_B_fail)
vals_B_fail.locked_amounts.claimable_locked = 0
with pytest.raises(AssertionError):
call_settle(token_network, channel_identifier, B, vals_B_fail, A,
vals_A)
vals_B_fail.locked_amounts.unclaimable_locked = 0
vals_B_fail.locked_amounts.claimable_locked = UINT256_MAX
with pytest.raises(TransactionFailed):
call_settle(token_network, channel_identifier, A, vals_A, B,
vals_B_fail)
vals_B_fail = deepcopy(vals_B)
vals_B_fail.locksroot = LOCKSROOT_OF_NO_LOCKS
with pytest.raises(TransactionFailed):
call_settle(token_network, channel_identifier, A, vals_A, B,
vals_B_fail)
vals_B_fail.locksroot = fake_bytes(32, "01")
with pytest.raises(TransactionFailed):
call_settle(token_network, channel_identifier, A, vals_A, B,
vals_B_fail)
# Channel is settled
call_settle(token_network, channel_identifier, A, vals_A, B, vals_B)
def test_settlement_with_unauthorized_token_transfer(
web3: Web3,
get_accounts: Callable,
custom_token: Contract,
token_network: Contract,
assign_tokens: Callable,
create_channel_and_deposit: Callable,
withdraw_channel: Callable,
close_and_update_channel: Callable,
) -> None:
"""A participant transfers some tokens to the contract and so loses them"""
externally_transferred_amount = 5
(A, B) = get_accounts(2)
(vals_A, vals_B) = (
ChannelValues(deposit=35, withdrawn=10, transferred=0),
ChannelValues(deposit=40, withdrawn=10, transferred=0),
)
vals_A.locksroot = fake_bytes(32, "02")
vals_B.locksroot = fake_bytes(32, "03")
channel_identifier = create_channel_and_deposit(A, B, vals_A.deposit,
vals_B.deposit)
withdraw_channel(channel_identifier, A, vals_A.withdrawn, UINT256_MAX, B)
withdraw_channel(channel_identifier, B, vals_B.withdrawn, UINT256_MAX, A)
close_and_update_channel(channel_identifier, A, vals_A, B, vals_B)
# Assign additional tokens to A
assign_tokens(A, externally_transferred_amount)
assert custom_token.functions.balanceOf(
A).call() >= externally_transferred_amount
# Fetch onchain balances after settlement
pre_balance_A = custom_token.functions.balanceOf(A).call()
pre_balance_B = custom_token.functions.balanceOf(B).call()
pre_balance_contract = custom_token.functions.balanceOf(
token_network.address).call()
# A does a transfer to the token_network without appropriate function call - tokens are lost
call_and_transact(
custom_token.functions.transfer(token_network.address,
externally_transferred_amount),
{"from": A},
)
assert custom_token.functions.balanceOf(
token_network.address).call() == (pre_balance_contract +
externally_transferred_amount)
mine_blocks(web3, TEST_SETTLE_TIMEOUT_MIN + 1)
# Compute expected settlement amounts
settlement = get_settlement_amounts(vals_A, vals_B)
# Channel is settled
call_settle(token_network, channel_identifier, A, vals_A, B, vals_B)
# Fetch onchain balances after settlement
post_balance_A = custom_token.functions.balanceOf(A).call()
post_balance_B = custom_token.functions.balanceOf(B).call()
post_balance_contract = custom_token.functions.balanceOf(
token_network.address).call()
# A has lost the externally_transferred_amount
assert (pre_balance_A + settlement.participant1_balance -
externally_transferred_amount) == post_balance_A
# B's settlement works correctly
assert pre_balance_B + settlement.participant2_balance == post_balance_B
# The externally_transferred_amount stays in the contract
assert (pre_balance_contract - settlement.participant1_balance -
settlement.participant2_balance +
externally_transferred_amount) == post_balance_contract
def test_close_channel_state(
web3,
custom_token,
token_network,
create_channel,
channel_deposit,
get_accounts,
get_block,
create_balance_proof,
txn_cost,
):
""" Observe the effect of a successful closeChannel
This test compares the state of the channel and the balances of Ethereum
accounts before/after a successful closeChannel call.
"""
(A, B) = get_accounts(2)
settle_timeout = TEST_SETTLE_TIMEOUT_MIN
vals_B = ChannelValues(
deposit=20,
transferred=5,
locksroot=fake_bytes(32, '03'),
claimable_locked=3,
unclaimable_locked=4,
nonce=3,
)
# Create channel and deposit
channel_identifier = create_channel(A, B, settle_timeout)[0]
channel_deposit(channel_identifier, B, vals_B.deposit, A)
# Check the state of the openned channel
(
settle_block_number,
state,
) = token_network.functions.getChannelInfo(channel_identifier, A,
B).call()
assert settle_block_number == settle_timeout
assert state == ChannelState.OPENED
(
_,
_,
A_is_the_closer,
A_balance_hash,
A_nonce,
_,
_,
) = token_network.functions.getChannelParticipantInfo(
channel_identifier, A, B).call()
assert A_is_the_closer is False
assert A_balance_hash == EMPTY_BALANCE_HASH
assert A_nonce == 0
(
_,
_,
B_is_the_closer,
B_balance_hash,
B_nonce,
_,
_,
) = token_network.functions.getChannelParticipantInfo(
channel_identifier, B, A).call()
assert B_is_the_closer is False
assert B_balance_hash == EMPTY_BALANCE_HASH
assert B_nonce == 0
pre_eth_balance_A = web3.eth.getBalance(A)
pre_eth_balance_B = web3.eth.getBalance(B)
pre_eth_balance_contract = web3.eth.getBalance(token_network.address)
pre_balance_A = custom_token.functions.balanceOf(A).call()
pre_balance_B = custom_token.functions.balanceOf(B).call()
pre_balance_contract = custom_token.functions.balanceOf(
token_network.address).call()
# Create a balance proof
balance_proof_B = create_balance_proof(
channel_identifier,
B,
vals_B.transferred,
vals_B.locked,
vals_B.nonce,
vals_B.locksroot,
)
txn_hash = token_network.functions.closeChannel(
channel_identifier,
B,
*balance_proof_B,
).transact({'from': A})
# Test that no balances have changed.
# There are no transfers to be made in closeChannel.
assert web3.eth.getBalance(A) == pre_eth_balance_A - txn_cost(txn_hash)
assert web3.eth.getBalance(B) == pre_eth_balance_B
assert web3.eth.getBalance(
token_network.address) == pre_eth_balance_contract
assert custom_token.functions.balanceOf(A).call() == pre_balance_A
assert custom_token.functions.balanceOf(B).call() == pre_balance_B
assert custom_token.functions.balanceOf(
token_network.address).call() == pre_balance_contract
(
settle_block_number,
state,
) = token_network.functions.getChannelInfo(channel_identifier, A,
B).call()
assert settle_block_number == settle_timeout + get_block(txn_hash)
assert state == ChannelState.CLOSED
(
_,
_,
A_is_the_closer,
A_balance_hash,
A_nonce,
_,
_,
) = token_network.functions.getChannelParticipantInfo(
channel_identifier, A, B).call()
assert A_is_the_closer is True
assert A_balance_hash == EMPTY_BALANCE_HASH
assert A_nonce == 0
(
_,
_,
B_is_the_closer,
B_balance_hash,
B_nonce,
_,
_,
) = token_network.functions.getChannelParticipantInfo(
channel_identifier, B, A).call()
assert B_is_the_closer is False
assert B_balance_hash == balance_proof_B[0]
assert B_nonce == vals_B.nonce
def test_close_nonce_zero(
get_accounts,
token_network,
create_channel,
create_balance_proof,
):
""" closeChannel with a balance proof with nonce zero should not change the channel state """
(A, B) = get_accounts(2)
vals_B = ChannelValues(
deposit=20,
transferred=5,
locksroot=fake_bytes(32, '03'),
claimable_locked=3,
unclaimable_locked=4,
nonce=0,
)
# Create channel and deposit
channel_identifier = create_channel(A, B)[0]
# Create balance proofs
balance_proof_B = create_balance_proof(
channel_identifier,
B,
vals_B.transferred,
vals_B.locked,
vals_B.nonce,
vals_B.locksroot,
)
(
_,
_,
B_is_the_closer,
B_balance_hash,
B_nonce,
_,
_,
) = token_network.functions.getChannelParticipantInfo(
channel_identifier, B, A).call()
assert B_is_the_closer is False
assert B_balance_hash == EMPTY_BALANCE_HASH
assert B_nonce == 0
token_network.functions.closeChannel(
channel_identifier,
B,
*balance_proof_B,
).transact({'from': A})
# Even though we somehow provide valid values for the balance proof, they are not taken into
# consideration if the nonce is 0.
# The Raiden client enforces that the nonce is > 0 if off-chain transfers are made.
(
_,
_,
B_is_the_closer,
B_balance_hash,
B_nonce,
_,
_,
) = token_network.functions.getChannelParticipantInfo(
channel_identifier, B, A).call()
assert B_is_the_closer is False
assert B_balance_hash == EMPTY_BALANCE_HASH
assert B_nonce == 0