def update_channel_state(channel_id, asset, commit=None,
revokes=None, cursor=None):
from picopayments_hub import api
state = db.load_channel_state(channel_id, asset, cursor=cursor)
unnotified_revokes = db.unnotified_revokes(channel_id=channel_id)
unnotified_commit = db.unnotified_commit(channel_id=channel_id,
cursor=cursor)
unnotified_revoke_secrets = [x["revoke_secret"]
for x in unnotified_revokes]
if commit is not None:
state = api.mpc_add_commit(
state=state,
commit_rawtx=commit["rawtx"],
commit_script=commit["script"]
)
if revokes is not None:
# TODO will not set revokes as unnotified
# currently not a problem as its only used for hub to client
# but its begging to be missused!!
state = api.mpc_revoke_all(state=state, secrets=revokes)
cursor.execute("BEGIN TRANSACTION;")
db.save_channel_state(
channel_id, state, h2c_unnotified_commit=unnotified_commit,
unnotified_revoke_secrets=unnotified_revoke_secrets, cursor=cursor
)
cursor.execute("COMMIT;")
return state
def sync_hub_connection(handle, next_revoke_secret_hash, payments, commit,
revokes):
cursor = sql.get_cursor()
hub_connection = db.hub_connection(handle=handle, cursor=cursor)
_update_channel_state(hub_connection, commit, revokes, cursor)
_process_payments(handle, payments, hub_connection, cursor)
_balance_channel(handle, cursor)
next_revoke_secret = create_secret() # create next spend secret
# load unnotified
c2h_id = hub_connection["c2h_channel_id"]
h2c_id = hub_connection["h2c_channel_id"]
h2c_commit = db.unnotified_commit(channel_id=h2c_id)
c2h_revokes = db.unnotified_revokes(channel_id=c2h_id)
receive_payments = db.unnotified_payments(payee_handle=handle)
# save sync data
h2c_commit_id = None
if h2c_commit:
h2c_commit_id = h2c_commit.pop("id")
_save_sync_data(cursor, handle, next_revoke_secret_hash, receive_payments,
h2c_commit_id, c2h_revokes, c2h_id, next_revoke_secret)
hub_key = db.channel_payer_key(id=h2c_id)
return ({
"receive": receive_payments,
"commit": h2c_commit,
"revokes": [r["revoke_secret"] for r in c2h_revokes],
"next_revoke_secret_hash": next_revoke_secret["secret_hash"]
}, hub_key["wif"])
def update_channel_state(channel_id,
asset,
commit=None,
revokes=None,
cursor=None):
from picopayments_hub import api
state = db.load_channel_state(channel_id, asset, cursor=cursor)
unnotified_revokes = db.unnotified_revokes(channel_id=channel_id)
unnotified_commit = db.unnotified_commit(channel_id=channel_id,
cursor=cursor)
unnotified_revoke_secrets = [
x["revoke_secret"] for x in unnotified_revokes
]
if commit is not None:
state = api.mpc_add_commit(state=state,
commit_rawtx=commit["rawtx"],
commit_script=commit["script"])
if revokes is not None:
# FIXME will not set revokes as unnotified
# currently not a problem as its only used for hub to client
# but its begging to be missused!!
state = api.mpc_revoke_all(state=state, secrets=revokes)
cursor.execute("BEGIN TRANSACTION;")
db.save_channel_state(channel_id,
state,
h2c_unnotified_commit=unnotified_commit,
unnotified_revoke_secrets=unnotified_revoke_secrets,
cursor=cursor)
cursor.execute("COMMIT;")
return state
def sync_hub_connection(handle, next_revoke_secret_hash,
payments, commit, revokes):
cursor = sql.get_cursor()
hub_connection = db.hub_connection(handle=handle, cursor=cursor)
_update_channel_state(hub_connection, commit, revokes, cursor)
_process_payments(handle, payments, hub_connection, cursor)
_balance_channel(handle, cursor)
next_revoke_secret = create_secret() # create next spend secret
# load unnotified
c2h_id = hub_connection["c2h_channel_id"]
h2c_id = hub_connection["h2c_channel_id"]
h2c_commit = db.unnotified_commit(channel_id=h2c_id)
c2h_revokes = db.unnotified_revokes(channel_id=c2h_id)
receive_payments = db.unnotified_payments(payee_handle=handle)
# save sync data
h2c_commit_id = None
if h2c_commit:
h2c_commit_id = h2c_commit.pop("id")
_save_sync_data(
cursor, handle, next_revoke_secret_hash, receive_payments,
h2c_commit_id, c2h_revokes, c2h_id, next_revoke_secret
)
hub_wif = load_wif()
return (
{
"receive": receive_payments,
"commit": h2c_commit,
"revokes": [r["revoke_secret"] for r in c2h_revokes],
"next_revoke_secret_hash": next_revoke_secret["secret_hash"]
},
hub_wif
)
def load_connection_data(handle, new_c2h_commit=None,
new_h2c_revokes=None, cursor=None):
from picopayments_hub import api
# TODO this is getting dangerous, used in lib and verify, split it up!
# connection data
connection = db.hub_connection(handle=handle, cursor=cursor)
if not connection:
raise err.HandleNotFound(handle)
asset = connection["asset"]
terms = db.terms(id=connection["terms_id"], cursor=cursor)
# h2c data
h2c_state = db.load_channel_state(
connection["h2c_channel_id"], connection["asset"], cursor=cursor
)
if new_h2c_revokes is not None:
h2c_state = api.mpc_revoke_all(state=h2c_state,
secrets=new_h2c_revokes)
h2c_deposit_address = deposit_address(h2c_state)
h2c_transferred = get_transferred_quantity(h2c_state)
h2c_deposit = get_balances(h2c_deposit_address, [asset])[asset]
# TODO remove now impossable unnotified commit?
h2c_unnotified_commit = db.unnotified_commit(
channel_id=connection["h2c_channel_id"], cursor=cursor
)
# c2h data
c2h_state = db.load_channel_state(
connection["c2h_channel_id"], connection["asset"], cursor=cursor
)
if new_c2h_commit is not None:
c2h_state = api.mpc_add_commit(
state=c2h_state,
commit_rawtx=new_c2h_commit["rawtx"],
commit_script=new_c2h_commit["script"]
)
c2h_transferred = get_transferred_quantity(c2h_state)
# payments
send_payments_sum = db.send_payments_sum(handle=handle, cursor=cursor)
recv_payments_sum = db.recv_payments_sum(handle=handle, cursor=cursor)
payments_sum = recv_payments_sum - send_payments_sum
# sendable (what this channel can send to another)
sendable_amount = c2h_transferred + payments_sum - h2c_transferred
assert sendable_amount >= 0
# receivable (what this channel can receive from another)
receivable_amount = h2c_deposit + c2h_transferred - payments_sum
assert receivable_amount >= 0
return {
"connection": connection,
"h2c_state": h2c_state,
"h2c_expired": is_expired(h2c_state, etc.expire_clearance),
"c2h_state": c2h_state,
"c2h_expired": is_expired(c2h_state, etc.expire_clearance),
"h2c_unnotified_commit": h2c_unnotified_commit,
"sendable_amount": sendable_amount,
"receivable_amount": receivable_amount,
"terms": terms,
}
def load_connection_data(handle,
new_c2h_commit=None,
new_h2c_revokes=None,
cursor=None):
from picopayments_hub import api
# FIXME this is getting dangerous, used in lib and verify, split it up!
# connection data
connection = db.hub_connection(handle=handle, cursor=cursor)
if not connection:
raise err.HandleNotFound(handle)
asset = connection["asset"]
terms = db.terms(id=connection["terms_id"], cursor=cursor)
# h2c data
h2c_state = db.load_channel_state(connection["h2c_channel_id"],
connection["asset"],
cursor=cursor)
if new_h2c_revokes is not None:
h2c_state = api.mpc_revoke_all(state=h2c_state,
secrets=new_h2c_revokes)
h2c_deposit_address = deposit_address(h2c_state)
h2c_transferred = get_transferred_quantity(h2c_state)
h2c_deposit = get_balances(h2c_deposit_address, [asset])[asset]
h2c_unnotified_commit = db.unnotified_commit(
channel_id=connection["h2c_channel_id"], cursor=cursor)
# c2h data
c2h_state = db.load_channel_state(connection["c2h_channel_id"],
connection["asset"],
cursor=cursor)
if new_c2h_commit is not None:
c2h_state = api.mpc_add_commit(state=c2h_state,
commit_rawtx=new_c2h_commit["rawtx"],
commit_script=new_c2h_commit["script"])
c2h_transferred = get_transferred_quantity(c2h_state)
# payments
send_payments_sum = db.send_payments_sum(handle=handle, cursor=cursor)
recv_payments_sum = db.recv_payments_sum(handle=handle, cursor=cursor)
payments_sum = recv_payments_sum - send_payments_sum
# sendable (what this channel can send to another)
sendable_amount = c2h_transferred + payments_sum - h2c_transferred
assert sendable_amount >= 0
# receivable (what this channel can receive from another)
receivable_amount = h2c_deposit + c2h_transferred - payments_sum
assert receivable_amount >= 0
return {
"connection": connection,
"h2c_state": h2c_state,
"h2c_expired": is_expired(h2c_state, etc.expire_clearance),
"c2h_state": c2h_state,
"c2h_expired": is_expired(c2h_state, etc.expire_clearance),
"h2c_unnotified_commit": h2c_unnotified_commit, # FIXME remove
"sendable_amount": sendable_amount,
"receivable_amount": receivable_amount,
"terms": terms,
}