def get(
channel_identifier,
participant,
transferred_amount=0,
locked_amount=0,
nonce=0,
locksroot=None,
additional_hash=None,
v=27,
signer=None,
other_token_network=None,
):
_token_network = other_token_network or token_network
private_key = get_private_key(signer or participant)
locksroot = locksroot or b'\x00' * 32
additional_hash = additional_hash or b'\x00' * 32
balance_hash = hash_balance_data(transferred_amount, locked_amount, locksroot)
signature = sign_balance_proof(
private_key,
_token_network.address,
int(_token_network.functions.chain_id().call()),
channel_identifier,
balance_hash,
nonce,
additional_hash,
v,
)
return (
balance_hash,
nonce,
additional_hash,
signature,
)
def get(
channel_identifier: int,
participant: HexAddress,
transferred_amount: int = 0,
locked_amount: int = 0,
nonce: int = 0,
locksroot: Optional[bytes] = None,
additional_hash: Optional[bytes] = None,
v: int = 27,
signer: Optional[HexAddress] = None,
other_token_network: Optional[Contract] = None,
) -> Tuple:
_token_network = other_token_network or token_network
private_key = get_private_key(signer or participant)
locksroot = locksroot or LOCKSROOT_OF_NO_LOCKS
additional_hash = additional_hash or b"\x00" * 32
balance_hash = hash_balance_data(transferred_amount, locked_amount,
locksroot)
signature = sign_balance_proof(
private_key,
_token_network.address,
int(_token_network.functions.chain_id().call()),
channel_identifier,
balance_hash,
nonce,
additional_hash,
v,
)
return (balance_hash, nonce, additional_hash, signature)
def get(
channel_identifier: ChannelID,
participant: HexAddress,
transferred_amount: TokenAmount = TokenAmount(0), # noqa
locked_amount: TokenAmount = TokenAmount(0), # noqa
nonce: Nonce = Nonce(0), # noqa
locksroot: Optional[Locksroot] = None,
additional_hash: Optional[AdditionalHash] = None,
v: int = 27,
signer: Optional[HexAddress] = None,
other_token_network: Optional[Contract] = None,
) -> OnchainBalanceProof:
_token_network = other_token_network or token_network
private_key = get_private_key(signer or participant)
locksroot = locksroot or LOCKSROOT_OF_NO_LOCKS
additional_hash = additional_hash or AdditionalHash(b"\x00" * 32)
balance_hash = hash_balance_data(transferred_amount, locked_amount,
locksroot)
signature = sign_balance_proof(
private_key,
_token_network.address,
_token_network.functions.chain_id().call(),
channel_identifier,
MessageTypeId.BALANCE_PROOF,
balance_hash,
nonce,
additional_hash,
v,
)
# The keys of the dictionary correspond to the parameters of
# create_balance_proof_countersignature.
return OnchainBalanceProof(
balance_hash=balance_hash,
nonce=nonce,
additional_hash=additional_hash,
original_signature=signature,
)