def detail_participants( # pylint: disable=unused-argument
participant1, participant2, block_identifier, channel_identifier):
transferred_amount = 1
locked_amount = 1
locksroot = make_32bytes()
balance_hash = hash_balance_data(transferred_amount, locked_amount,
locksroot)
our_details = ParticipantDetails(
address=raiden.address,
deposit=5,
withdrawn=0,
is_closer=False,
balance_hash=balance_hash,
nonce=1,
locksroot=locksroot,
locked_amount=locked_amount,
)
transferred_amount = 1
locked_amount = 1
# Let's mock here that partner locksroot is 0x0
balance_hash = hash_balance_data(transferred_amount, locked_amount,
locksroot)
partner_details = ParticipantDetails(
address=participant,
deposit=5,
withdrawn=0,
is_closer=True,
balance_hash=balance_hash,
nonce=1,
locksroot=EMPTY_HASH,
locked_amount=locked_amount,
)
return ParticipantsDetails(our_details, partner_details)
def detail_participants(participant1, participant2, channel_identifier):
transferred_amount = 1
locked_amount = 1
locksroot = make_32bytes()
balance_hash = hash_balance_data(transferred_amount, locked_amount, locksroot)
our_details = ParticipantDetails(
address=raiden.address,
deposit=5,
withdrawn=0,
is_closer=False,
balance_hash=balance_hash,
nonce=1,
locksroot=locksroot,
locked_amount=locked_amount,
)
transferred_amount = 1
locked_amount = 1
# Let's mock here that partner locksroot is 0x0
locksroot = EMPTY_HASH
balance_hash = hash_balance_data(transferred_amount, locked_amount, locksroot)
partner_details = ParticipantDetails(
address=participant,
deposit=5,
withdrawn=0,
is_closer=True,
balance_hash=balance_hash,
nonce=1,
locksroot=locksroot,
locked_amount=locked_amount,
)
return ParticipantsDetails(our_details, partner_details)
def detail_participants(_participant1, _participant2, _block_identifier,
_channel_identifier):
transferred_amount = TokenAmount(1)
locked_amount = LockedAmount(1)
locksroot = make_locksroot()
balance_hash = hash_balance_data(transferred_amount, locked_amount,
locksroot)
our_details = ParticipantDetails(
address=raiden.address,
deposit=TokenAmount(5),
withdrawn=WithdrawAmount(0),
is_closer=False,
balance_hash=balance_hash,
nonce=Nonce(1),
locksroot=locksroot,
locked_amount=locked_amount,
)
transferred_amount = TokenAmount(1)
locked_amount = LockedAmount(1)
# Let's mock here that partner locksroot is 0x0
balance_hash = hash_balance_data(transferred_amount, locked_amount,
locksroot)
partner_details = ParticipantDetails(
address=participant,
deposit=TokenAmount(5),
withdrawn=WithdrawAmount(0),
is_closer=True,
balance_hash=balance_hash,
nonce=Nonce(1),
locksroot=LOCKSROOT_OF_NO_LOCKS,
locked_amount=locked_amount,
)
return ParticipantsDetails(our_details, partner_details)
def _(properties: BalanceProofSignedStateProperties,
defaults=None) -> BalanceProofSignedState:
defaults = defaults or BALANCE_PROOF_SIGNED_STATE_DEFAULTS
params = _properties_to_dict(properties, defaults)
params.update(
_properties_to_dict(params.pop('balance_proof'),
defaults.balance_proof), )
signer = LocalSigner(params.pop('pkey'))
if params['signature'] is EMPTY:
keys = ('transferred_amount', 'locked_amount', 'locksroot')
balance_hash = hash_balance_data(**_partial_dict(params, *keys))
canonical_identifier = CanonicalIdentifier(
chain_identifier=params.pop('chain_id'),
token_network_address=params.pop('token_network_identifier'),
channel_identifier=params.pop('channel_identifier'),
)
params['canonical_identifier'] = canonical_identifier
data_to_sign = balance_proof.pack_balance_proof(
balance_hash=balance_hash,
additional_hash=params['message_hash'],
canonical_identifier=canonical_identifier,
nonce=params.get('nonce'),
)
params['signature'] = signer.sign(data=data_to_sign)
return BalanceProofSignedState(**params)
def __post_init__(self) -> None:
typecheck(self.nonce, int)
typecheck(self.transferred_amount, T_TokenAmount)
typecheck(self.locked_amount, T_TokenAmount)
typecheck(self.locksroot, T_Locksroot)
if self.nonce <= 0:
raise ValueError("nonce cannot be zero or negative")
if self.nonce > UINT64_MAX:
raise ValueError("nonce is too large")
if self.transferred_amount < 0:
raise ValueError("transferred_amount cannot be negative")
if self.transferred_amount > UINT256_MAX:
raise ValueError("transferred_amount is too large")
if len(self.locksroot) != 32:
raise ValueError("locksroot must have length 32")
self.canonical_identifier.validate()
self.balance_hash = hash_balance_data(
transferred_amount=self.transferred_amount,
locked_amount=self.locked_amount,
locksroot=self.locksroot,
)
def make_signed_balance_proof_from_unsigned(
unsigned: BalanceProofUnsignedState,
signer: Signer) -> BalanceProofSignedState:
balance_hash = hash_balance_data(
transferred_amount=unsigned.transferred_amount,
locked_amount=unsigned.locked_amount,
locksroot=unsigned.locksroot,
)
additional_hash = make_additional_hash()
data_to_sign = balance_proof.pack_balance_proof(
balance_hash=balance_hash,
additional_hash=additional_hash,
canonical_identifier=unsigned.canonical_identifier,
nonce=unsigned.nonce,
)
signature = signer.sign(data=data_to_sign)
sender = signer.address
return BalanceProofSignedState(
nonce=unsigned.nonce,
transferred_amount=unsigned.transferred_amount,
locked_amount=unsigned.locked_amount,
locksroot=unsigned.locksroot,
message_hash=additional_hash,
signature=signature,
sender=sender,
canonical_identifier=unsigned.canonical_identifier,
)
def make_signed_balance_proof(
nonce: typing.Nonce = EMPTY,
transferred_amount: typing.TokenAmount = EMPTY,
locked_amount: typing.TokenAmount = EMPTY,
token_network_address: typing.TokenNetworkID = EMPTY,
channel_identifier: typing.ChannelID = EMPTY,
locksroot: typing.Locksroot = EMPTY,
extra_hash: typing.Keccak256 = EMPTY,
private_key: bytes = EMPTY,
sender_address: typing.Address = EMPTY,
) -> BalanceProofSignedState:
nonce = if_empty(nonce, make_uint256())
transferred_amount = if_empty(transferred_amount, make_uint256())
locked_amount = if_empty(locked_amount, make_uint256())
token_network_address = if_empty(token_network_address, make_address())
channel_identifier = if_empty(channel_identifier, make_uint256())
locksroot = if_empty(locksroot, make_32bytes())
extra_hash = if_empty(extra_hash, make_keccak_hash())
private_key = if_empty(private_key, make_privatekey())
sender_address = if_empty(sender_address, make_address())
signer = LocalSigner(private_key)
balance_hash = hash_balance_data(
transferred_amount=transferred_amount,
locked_amount=locked_amount,
locksroot=locksroot,
)
data_to_sign = balance_proof.pack_balance_proof(
nonce=nonce,
balance_hash=balance_hash,
additional_hash=extra_hash,
canonical_identifier=CanonicalIdentifier(
chain_identifier=UNIT_CHAIN_ID,
token_network_address=token_network_address,
channel_identifier=channel_identifier,
),
)
signature = signer.sign(data=data_to_sign)
return BalanceProofSignedState(
nonce=nonce,
transferred_amount=transferred_amount,
locked_amount=locked_amount,
locksroot=locksroot,
message_hash=extra_hash,
signature=signature,
sender=sender_address,
canonical_identifier=CanonicalIdentifier(
chain_identifier=UNIT_CHAIN_ID,
token_network_address=token_network_address,
channel_identifier=channel_identifier,
),
)
def make_signed_balance_proof(
nonce,
transferred_amount,
locked_amount,
token_network_address,
channel_address,
locksroot,
extra_hash,
private_key,
sender_address,
):
data_to_sign = balance_proof.signing_data(
nonce,
transferred_amount,
locked_amount,
channel_address,
locksroot,
extra_hash,
)
balance_hash = hash_balance_data(
transferred_amount,
locked_amount,
locksroot,
)
data_to_sign = balance_proof.pack_signing_data(
nonce=nonce,
balance_hash=balance_hash,
additional_hash=extra_hash,
channel_identifier=channel_address,
token_network_identifier=token_network_address,
chain_id=UNIT_CHAIN_ID,
)
signature = signing.sign(data_to_sign, private_key)
signed_balance_proof = BalanceProofSignedState(
nonce,
transferred_amount,
locked_amount,
locksroot,
token_network_address,
channel_address,
extra_hash,
signature,
sender_address,
UNIT_CHAIN_ID,
)
return signed_balance_proof
def make_signed_balance_proof(
nonce,
transferred_amount,
locked_amount,
token_network_address,
channel_address,
locksroot,
extra_hash,
private_key,
sender_address,
):
data_to_sign = balance_proof.signing_data(
nonce,
transferred_amount,
locked_amount,
channel_address,
locksroot,
extra_hash,
)
balance_hash = hash_balance_data(
transferred_amount,
locked_amount,
locksroot,
)
data_to_sign = balance_proof.pack_signing_data(
nonce=nonce,
balance_hash=balance_hash,
additional_hash=extra_hash,
channel_identifier=channel_address,
token_network_identifier=token_network_address,
chain_id=UNIT_CHAIN_ID,
)
signature = signing.sign(data_to_sign, private_key)
signed_balance_proof = BalanceProofSignedState(
nonce,
transferred_amount,
locked_amount,
locksroot,
token_network_address,
channel_address,
extra_hash,
signature,
sender_address,
UNIT_CHAIN_ID,
)
return signed_balance_proof
def _data_to_sign(self) -> bytes:
balance_hash = hash_balance_data(self.transferred_amount,
self.locked_amount, self.locksroot)
balance_proof_packed = pack_balance_proof(
nonce=self.nonce,
balance_hash=balance_hash,
additional_hash=AdditionalHash(self.message_hash),
canonical_identifier=CanonicalIdentifier(
chain_identifier=self.chain_id,
token_network_address=self.token_network_address,
channel_identifier=self.channel_identifier,
),
)
return balance_proof_packed
def make_signed_balance_proof(
nonce: typing.Nonce = EMPTY,
transferred_amount: typing.TokenAmount = EMPTY,
locked_amount: typing.TokenAmount = EMPTY,
token_network_address: typing.TokenNetworkID = EMPTY,
channel_identifier: typing.ChannelID = EMPTY,
locksroot: typing.Locksroot = EMPTY,
extra_hash: typing.Keccak256 = EMPTY,
private_key: PrivateKey = EMPTY,
sender_address: typing.Address = EMPTY,
) -> BalanceProofSignedState:
nonce = if_empty(nonce, make_uint256())
transferred_amount = if_empty(transferred_amount, make_uint256())
locked_amount = if_empty(locked_amount, make_uint256())
token_network_address = if_empty(token_network_address, make_address())
channel_identifier = if_empty(channel_identifier, make_uint256())
locksroot = if_empty(locksroot, make_32bytes())
extra_hash = if_empty(extra_hash, make_keccak_hash())
private_key = if_empty(private_key, make_privatekey())
sender_address = if_empty(sender_address, make_address())
balance_hash = hash_balance_data(
transferred_amount=transferred_amount,
locked_amount=locked_amount,
locksroot=locksroot,
)
data_to_sign = balance_proof.pack_balance_proof(
nonce=nonce,
balance_hash=balance_hash,
additional_hash=extra_hash,
channel_identifier=channel_identifier,
token_network_identifier=token_network_address,
chain_id=UNIT_CHAIN_ID,
)
signature = eth_sign(privkey=private_key, data=data_to_sign)
return BalanceProofSignedState(
nonce=nonce,
transferred_amount=transferred_amount,
locked_amount=locked_amount,
locksroot=locksroot,
token_network_identifier=token_network_address,
channel_identifier=channel_identifier,
message_hash=extra_hash,
signature=signature,
sender=sender_address,
chain_id=UNIT_CHAIN_ID,
)
def _verify_settle_state(
self,
transferred_amount: int,
locked_amount: int,
locksroot: typing.Locksroot,
partner: typing.Address,
partner_transferred_amount: int,
partner_locked_amount: int,
partner_locksroot: typing.Locksroot,
):
"""Check if our local state is up to date with on-chain state."""
participant_data = self.detail_participants(self.node_address, partner)
our_balance_hash_ok = hash_balance_data(
transferred_amount,
locked_amount,
locksroot,
) == participant_data.our_details.balance_hash
partner_balance_hash_ok = hash_balance_data(
partner_transferred_amount,
partner_locked_amount,
partner_locksroot,
) == participant_data.partner_details.balance_hash
return our_balance_hash_ok and partner_balance_hash_ok
def _data_to_sign(self) -> bytes:
balance_hash = hash_balance_data(
self.transferred_amount,
self.locked_amount,
self.locksroot,
)
balance_proof_packed = pack_signing_data(
nonce=self.nonce,
balance_hash=balance_hash,
additional_hash=self.message_hash,
channel_identifier=self.channel,
token_network_identifier=self.token_network_address,
chain_id=self.chain_id,
)
return balance_proof_packed
def _data_to_sign(self) -> bytes:
balance_hash = hash_balance_data(
self.transferred_amount,
self.locked_amount,
self.locksroot,
)
balance_proof_packed = pack_signing_data(
nonce=self.nonce,
balance_hash=balance_hash,
additional_hash=self.message_hash,
channel_identifier=self.channel_identifier,
token_network_identifier=self.token_network_address,
chain_id=self.chain_id,
)
return balance_proof_packed
def sign2(self, private_key, chain_id):
""" Creates the signature to the balance proof. Will be used in the SC refactoring. """
balance_hash = hash_balance_data(
self.transferred_amount,
self.locked_amount,
self.locksroot,
)
balance_proof_packed = pack_signing_data2(
nonce=self.nonce,
balance_hash=balance_hash,
additional_hash=self.message_hash.decode(),
channel_identifier=self.channel,
token_network_address=self.token_network_address,
chain_id=chain_id,
)
self.signature = encode_hex(
sign_data(self.privkey, balance_proof_packed),
)
def from_balance_proof_signed_state(
cls, balance_proof: BalanceProofSignedState
) -> "SignedBlindedBalanceProof":
typecheck(balance_proof, BalanceProofSignedState)
# pylint: disable=unexpected-keyword-arg
return cls(
channel_identifier=balance_proof.channel_identifier,
token_network_address=balance_proof.token_network_address,
nonce=balance_proof.nonce,
additional_hash=balance_proof.message_hash,
chain_id=balance_proof.chain_id,
signature=balance_proof.signature,
balance_hash=hash_balance_data(
balance_proof.transferred_amount,
balance_proof.locked_amount,
balance_proof.locksroot,
),
)
def _(properties: BalanceProofSignedStateProperties,
defaults=None) -> BalanceProofSignedState:
defaults = defaults or BalanceProofSignedStateProperties.DEFAULTS
params = create_properties(properties, defaults).__dict__
signer = LocalSigner(params.pop("pkey"))
if params["signature"] is GENERATE:
keys = ("transferred_amount", "locked_amount", "locksroot")
balance_hash = hash_balance_data(**_partial_dict(params, *keys))
data_to_sign = balance_proof.pack_balance_proof(
balance_hash=balance_hash,
additional_hash=params["message_hash"],
canonical_identifier=params["canonical_identifier"],
nonce=params.get("nonce"),
)
params["signature"] = signer.sign(data=data_to_sign)
return BalanceProofSignedState(**params)
def _(properties: BalanceProofSignedStateProperties, defaults=None) -> BalanceProofSignedState:
defaults = defaults or BALANCE_PROOF_SIGNED_STATE_DEFAULTS
params = _properties_to_dict(properties, defaults)
params.update(
_properties_to_dict(params.pop('balance_proof'), defaults.balance_proof),
)
if params['signature'] is EMPTY:
keys = ('transferred_amount', 'locked_amount', 'locksroot')
balance_hash = hash_balance_data(**_partial_dict(params, *keys))
keys = ('nonce', 'channel_identifier', 'token_network_identifier')
data_to_sign = balance_proof.pack_balance_proof(
balance_hash=balance_hash,
additional_hash=params['message_hash'],
chain_id=UNIT_CHAIN_ID,
**_partial_dict(params, *keys),
)
params['signature'] = eth_sign(privkey=params.pop('pkey'), data=data_to_sign)
return BalanceProofSignedState(**params)
def __post_init__(self) -> None:
typecheck(self.nonce, int)
typecheck(self.transferred_amount, T_TokenAmount)
typecheck(self.locked_amount, T_LockedAmount)
typecheck(self.locksroot, T_Locksroot)
typecheck(self.message_hash, bytes)
typecheck(self.signature, T_Signature)
typecheck(self.sender, T_Address)
if self.nonce <= 0:
raise ValueError("nonce cannot be zero or negative")
if self.nonce > UINT64_MAX:
raise ValueError("nonce is too large")
if self.transferred_amount < 0:
raise ValueError("transferred_amount cannot be negative")
if self.transferred_amount > UINT256_MAX:
raise ValueError("transferred_amount is too large")
if len(self.locksroot) != 32:
raise ValueError("locksroot must have length 32")
if len(self.message_hash) != 32:
raise ValueError("message_hash is an invalid hash")
if len(self.signature) != 65:
raise ValueError("signature is an invalid signature")
self.canonical_identifier.validate()
self.balance_hash = hash_balance_data(
transferred_amount=self.transferred_amount,
locked_amount=self.locked_amount,
locksroot=self.locksroot,
)
def _(properties: BalanceProofSignedStateProperties,
defaults=None) -> BalanceProofSignedState:
defaults = defaults or BALANCE_PROOF_SIGNED_STATE_DEFAULTS
params = _properties_to_dict(properties, defaults)
params.update(
_properties_to_dict(params.pop('balance_proof'),
defaults.balance_proof), )
if params['signature'] is EMPTY:
keys = ('transferred_amount', 'locked_amount', 'locksroot')
balance_hash = hash_balance_data(**_partial_dict(params, *keys))
keys = ('nonce', 'channel_identifier', 'token_network_identifier')
data_to_sign = balance_proof.pack_balance_proof(
balance_hash=balance_hash,
additional_hash=params['message_hash'],
chain_id=UNIT_CHAIN_ID,
**_partial_dict(params, *keys),
)
params['signature'] = eth_sign(privkey=params.pop('pkey'),
data=data_to_sign)
return BalanceProofSignedState(**params)
def hash_balance_data(transferred_amount: TokenAmount,
locked_amount: LockedAmount,
locksroot: Locksroot) -> BalanceHash:
return hash_balance_data(transferred_amount, locked_amount, locksroot)
def find_max_pending_transfers(gas_limit):
"""Measure gas consumption of TokenNetwork.unlock() depending on number of
pending transfers and find the maximum number of pending transfers so
gas_limit is not exceeded."""
tester = ContractTester(generate_keys=2)
tester.deploy_contract('SecretRegistry')
tester.deploy_contract(
'HumanStandardToken',
_initialAmount=100000,
_decimalUnits=3,
_tokenName='SomeToken',
_tokenSymbol='SMT',
)
tester.deploy_contract(
'TokenNetwork',
_token_address=tester.contract_address('HumanStandardToken'),
_secret_registry=tester.contract_address('SecretRegistry'),
_chain_id=1,
_settlement_timeout_min=100,
_settlement_timeout_max=200,
)
tester.call_transaction(
'HumanStandardToken',
'transfer',
_to=tester.accounts[1],
_value=10000,
)
receipt = tester.call_transaction(
'TokenNetwork',
'openChannel',
participant1=tester.accounts[0],
participant2=tester.accounts[1],
settle_timeout=150,
)
channel_identifier = int(hexlify(receipt['logs'][0]['topics'][1]), 16)
tester.call_transaction(
'HumanStandardToken',
'approve',
sender=tester.accounts[0],
_spender=tester.contract_address('TokenNetwork'),
_value=10000,
)
tester.call_transaction(
'HumanStandardToken',
'approve',
sender=tester.accounts[1],
_spender=tester.contract_address('TokenNetwork'),
_value=5000,
)
tester.call_transaction(
'TokenNetwork',
'setTotalDeposit',
channel_identifier=channel_identifier,
participant=tester.accounts[0],
total_deposit=5000,
partner=tester.accounts[1],
)
tester.call_transaction(
'TokenNetwork',
'setTotalDeposit',
channel_identifier=channel_identifier,
participant=tester.accounts[1],
total_deposit=2000,
partner=tester.accounts[0],
)
print(
"Measuring unlock()'s gas cost for different Merkle tree widths, can take a while..."
)
before_closing = tester.tester.take_snapshot()
enough = 0
too_much = 1024
nonce = 10
additional_hash = urandom(32)
token_network_identifier = tester.contract_address('TokenNetwork')
while enough + 1 < too_much:
tree_size = (enough + too_much) // 2
tester.tester.revert_to_snapshot(before_closing)
pending_transfers_tree = get_pending_transfers_tree(
tester.web3,
unlockable_amounts=[1] * tree_size,
)
balance_hash = hash_balance_data(3000, 2000,
pending_transfers_tree.merkle_root)
data_to_sign = pack_balance_proof(
nonce=nonce,
balance_hash=balance_hash,
additional_hash=additional_hash,
channel_identifier=channel_identifier,
token_network_identifier=token_network_identifier,
chain_id=1,
)
signature = eth_sign(privkey=tester.private_keys[1], data=data_to_sign)
tester.call_transaction(
'TokenNetwork',
'closeChannel',
channel_identifier=channel_identifier,
partner=tester.accounts[1],
balance_hash=balance_hash,
nonce=nonce,
additional_hash=additional_hash,
signature=signature,
)
tester.tester.mine_blocks(160) # close settlement window
tester.call_transaction(
'TokenNetwork',
'settleChannel',
channel_identifier=channel_identifier,
participant1=tester.accounts[0],
participant1_transferred_amount=0,
participant1_locked_amount=0,
participant1_locksroot=b'\x00' * 32,
participant2=tester.accounts[1],
participant2_transferred_amount=3000,
participant2_locked_amount=2000,
participant2_locksroot=pending_transfers_tree.merkle_root,
)
receipt = tester.call_transaction(
'TokenNetwork',
'unlock',
channel_identifier=channel_identifier,
participant=tester.accounts[0],
partner=tester.accounts[1],
merkle_tree_leaves=pending_transfers_tree.packed_transfers,
)
gas_used = receipt['gasUsed']
if gas_used <= gas_limit:
enough = tree_size
print(
f'{tree_size} pending transfers work ({gas_used} gas needed to unlock)'
)
else:
too_much = tree_size
print(
f'{tree_size} pending transfers are too much ({gas_used} gas needed to unlock)'
)
def find_max_pending_transfers(gas_limit):
"""Measure gas consumption of TokenNetwork.unlock() depending on number of
pending transfers and find the maximum number of pending transfers so
gas_limit is not exceeded."""
tester = ContractTester(generate_keys=2)
tester.deploy_contract('SecretRegistry')
tester.deploy_contract(
'HumanStandardToken',
_initialAmount=100000,
_decimalUnits=3,
_tokenName='SomeToken',
_tokenSymbol='SMT',
)
tester.deploy_contract(
'TokenNetwork',
_token_address=tester.contract_address('HumanStandardToken'),
_secret_registry=tester.contract_address('SecretRegistry'),
_chain_id=1,
_settlement_timeout_min=100,
_settlement_timeout_max=200,
)
tester.call_transaction(
'HumanStandardToken',
'transfer',
_to=tester.accounts[1],
_value=10000,
)
receipt = tester.call_transaction(
'TokenNetwork',
'openChannel',
participant1=tester.accounts[0],
participant2=tester.accounts[1],
settle_timeout=150,
)
channel_identifier = int(encode_hex(receipt['logs'][0]['topics'][1]), 16)
tester.call_transaction(
'HumanStandardToken',
'approve',
sender=tester.accounts[0],
_spender=tester.contract_address('TokenNetwork'),
_value=10000,
)
tester.call_transaction(
'HumanStandardToken',
'approve',
sender=tester.accounts[1],
_spender=tester.contract_address('TokenNetwork'),
_value=5000,
)
tester.call_transaction(
'TokenNetwork',
'setTotalDeposit',
channel_identifier=channel_identifier,
participant=tester.accounts[0],
total_deposit=5000,
partner=tester.accounts[1],
)
tester.call_transaction(
'TokenNetwork',
'setTotalDeposit',
channel_identifier=channel_identifier,
participant=tester.accounts[1],
total_deposit=2000,
partner=tester.accounts[0],
)
print("Measuring unlock()'s gas cost for different Merkle tree widths, can take a while...")
before_closing = tester.tester.take_snapshot()
enough = 0
too_much = 1024
nonce = 10
additional_hash = urandom(32)
token_network_identifier = tester.contract_address('TokenNetwork')
while enough + 1 < too_much:
tree_size = (enough + too_much) // 2
tester.tester.revert_to_snapshot(before_closing)
pending_transfers_tree = get_pending_transfers_tree(
tester.web3,
unlockable_amounts=[1] * tree_size,
)
balance_hash = hash_balance_data(3000, 2000, pending_transfers_tree.merkle_root)
data_to_sign = pack_balance_proof(
nonce=nonce,
balance_hash=balance_hash,
additional_hash=additional_hash,
channel_identifier=channel_identifier,
token_network_identifier=token_network_identifier,
chain_id=1,
)
signature = eth_sign(privkey=tester.private_keys[1], data=data_to_sign)
tester.call_transaction(
'TokenNetwork',
'closeChannel',
channel_identifier=channel_identifier,
partner=tester.accounts[1],
balance_hash=balance_hash,
nonce=nonce,
additional_hash=additional_hash,
signature=signature,
)
tester.tester.mine_blocks(160) # close settlement window
tester.call_transaction(
'TokenNetwork',
'settleChannel',
channel_identifier=channel_identifier,
participant1=tester.accounts[0],
participant1_transferred_amount=0,
participant1_locked_amount=0,
participant1_locksroot=b'\x00' * 32,
participant2=tester.accounts[1],
participant2_transferred_amount=3000,
participant2_locked_amount=2000,
participant2_locksroot=pending_transfers_tree.merkle_root,
)
receipt = tester.call_transaction(
'TokenNetwork',
'unlock',
channel_identifier=channel_identifier,
participant=tester.accounts[0],
partner=tester.accounts[1],
merkle_tree_leaves=pending_transfers_tree.packed_transfers,
)
gas_used = receipt['gasUsed']
if gas_used <= gas_limit:
enough = tree_size
print(f'{tree_size} pending transfers work ({gas_used} gas needed to unlock)')
else:
too_much = tree_size
print(f'{tree_size} pending transfers are too much ({gas_used} gas needed to unlock)')
def test_hash_balance_data(values, expected):
assert (hash_balance_data(values[0], values[1], values[2]) == expected)
def test_hash_balance_data(values, expected):
assert(hash_balance_data(values[0], values[1], values[2]) == expected)
def balance_hash(self):
return hash_balance_data(
transferred_amount=self.transferred_amount,
locked_amount=self.locked_amount,
locksroot=self.locksroot,
)
def balance_hash(self):
return hash_balance_data(
transferred_amount=self.transferred_amount,
locked_amount=self.locked_amount,
locksroot=self.locksroot,
)
def find_max_pending_transfers(gas_limit) -> None:
"""Measure gas consumption of TokenNetwork.unlock() depending on number of
pending transfers and find the maximum number of pending transfers so
gas_limit is not exceeded."""
tester = ContractTester(generate_keys=2)
tester.deploy_contract("SecretRegistry")
tester.deploy_contract(
"HumanStandardToken",
_initialAmount=100_000,
_decimalUnits=3,
_tokenName="SomeToken",
_tokenSymbol="SMT",
)
tester.deploy_contract(
"TokenNetwork",
_token_address=tester.contract_address("HumanStandardToken"),
_secret_registry=tester.contract_address("SecretRegistry"),
_chain_id=CHAIN_ID,
_settlement_timeout_min=100,
_settlement_timeout_max=200,
_deprecation_executor=tester.accounts[0],
_channel_participant_deposit_limit=10000,
_token_network_deposit_limit=10000,
)
tester.call_transaction("HumanStandardToken",
"transfer",
_to=tester.accounts[1],
_value=10000)
receipt = tester.call_transaction(
"TokenNetwork",
"openChannel",
participant1=tester.accounts[0],
participant2=tester.accounts[1],
settle_timeout=150,
)
channel_identifier = ChannelID(
int(encode_hex(receipt["logs"][0]["topics"][1]), 16))
tester.call_transaction(
"HumanStandardToken",
"approve",
sender=tester.accounts[0],
_spender=tester.contract_address("TokenNetwork"),
_value=10000,
)
tester.call_transaction(
"HumanStandardToken",
"approve",
sender=tester.accounts[1],
_spender=tester.contract_address("TokenNetwork"),
_value=5000,
)
tester.call_transaction(
"TokenNetwork",
"setTotalDeposit",
channel_identifier=channel_identifier,
participant=tester.accounts[0],
total_deposit=5000,
partner=tester.accounts[1],
)
tester.call_transaction(
"TokenNetwork",
"setTotalDeposit",
channel_identifier=channel_identifier,
participant=tester.accounts[1],
total_deposit=2000,
partner=tester.accounts[0],
)
print(
"Measuring unlock()'s gas cost for different Merkle tree widths, can take a while..."
)
before_closing = tester.tester.take_snapshot()
enough = 0
too_much = 1024
nonce = Nonce(10)
additional_hash = AdditionalHash(urandom(32))
token_network_address = tester.contract_address("TokenNetwork")
while enough + 1 < too_much:
tree_size = (enough + too_much) // 2
tester.tester.revert_to_snapshot(before_closing)
pending_transfers_tree = get_pending_transfers_tree(
tester.web3,
unlockable_amounts=[1] * tree_size,
expired_amounts=[])
balance_hash = hash_balance_data(
transferred_amount=TokenAmount(3000),
locked_amount=TokenAmount(2000),
locksroot=Locksroot(
pending_transfers_tree.hash_of_packed_transfers),
)
canonical_identifier = CanonicalIdentifier(
chain_identifier=CHAIN_ID,
token_network_address=token_network_address,
channel_identifier=ChannelID(channel_identifier),
)
data_to_sign = pack_balance_proof(
nonce=Nonce(nonce),
balance_hash=balance_hash,
additional_hash=additional_hash,
canonical_identifier=canonical_identifier,
)
signature = LocalSigner(tester.private_keys[1]).sign(data=data_to_sign)
tester.call_transaction(
"TokenNetwork",
"closeChannel",
channel_identifier=channel_identifier,
partner=tester.accounts[1],
balance_hash=balance_hash,
nonce=nonce,
additional_hash=additional_hash,
signature=signature,
)
tester.tester.mine_blocks(160) # close settlement window
tester.call_transaction(
"TokenNetwork",
"settleChannel",
channel_identifier=channel_identifier,
participant1=tester.accounts[0],
participant1_transferred_amount=0,
participant1_locked_amount=0,
participant1_locksroot=b"\x00" * 32,
participant2=tester.accounts[1],
participant2_transferred_amount=3000,
participant2_locked_amount=2000,
participant2_locksroot=pending_transfers_tree.
hash_of_packed_transfers,
)
receipt = tester.call_transaction(
"TokenNetwork",
"unlock",
channel_identifier=channel_identifier,
participant=tester.accounts[0],
partner=tester.accounts[1],
merkle_tree_leaves=pending_transfers_tree.packed_transfers,
)
gas_used = receipt["gasUsed"]
if gas_used <= gas_limit:
enough = tree_size
print(
f"{tree_size} pending transfers work ({gas_used} gas needed to unlock)"
)
else:
too_much = tree_size
print(
f"{tree_size} pending transfers are too much ({gas_used} gas needed to unlock)"
)
