def publish_commits():
with etc.database_lock:
txids = []
cursor = sql.get_cursor()
for hub_connection in db.hub_connections_complete(cursor=cursor):
asset = hub_connection["asset"]
c2h_mpc_id = hub_connection["c2h_channel_id"]
c2h_state = db.load_channel_state(c2h_mpc_id, asset, cursor=cursor)
h2c_mpc_id = hub_connection["h2c_channel_id"]
h2c_state = db.load_channel_state(h2c_mpc_id, asset, cursor=cursor)
h2c_spend_secret_hash = get_deposit_spend_secret_hash(
h2c_state["deposit_script"])
h2c_spend_secret = lib.get_secret(h2c_spend_secret_hash)
c2h_expired = lib.is_expired(c2h_state, etc.expire_clearance)
h2c_expired = lib.is_expired(h2c_state, etc.expire_clearance)
expired = c2h_expired or h2c_expired
h2c_commits_published = api.mpc_published_commits(state=h2c_state)
closed = hub_connection["closed"] != 0
# connection expired or commit published or spend secret known
if expired or closed or h2c_commits_published or h2c_spend_secret:
if not closed:
db.set_connection_closed(handle=hub_connection["handle"])
c2h_commits_published = api.mpc_published_commits(
state=c2h_state)
if len(c2h_commits_published) == 0:
txid = Mpc(api).finalize_commit(lib.get_wif, c2h_state)
if txid:
txids.append(txid)
return txids
def fund_deposits():
"""Fund or top off open channels."""
with etc.database_lock:
deposits = []
cursor = sql.get_cursor()
for hub_connection in db.hub_connections_open(cursor=cursor):
asset = hub_connection["asset"]
terms = db.terms(id=hub_connection["terms_id"], cursor=cursor)
# load client to hub data
c2h_mpc_id = hub_connection["c2h_channel_id"]
c2h_state = db.load_channel_state(c2h_mpc_id, asset, cursor=cursor)
c2h_deposit_address = lib.deposit_address(c2h_state)
c2h_deposit_balance = lib.get_balances(c2h_deposit_address,
assets=[asset])[asset]
if c2h_deposit_balance < terms["deposit_min"]:
continue # ignore if client deposit insufficient
if lib.is_expired(c2h_state, etc.expire_clearance):
continue # ignore if expires soon
if lib.has_unconfirmed_transactions(c2h_deposit_address):
continue # ignore if unconfirmed transaction inputs/outputs
if api.mpc_published_commits(state=c2h_state):
continue # ignore if c2h commit published
# load hub to client data
h2c_mpc_id = hub_connection["h2c_channel_id"]
h2c_state = db.load_channel_state(h2c_mpc_id, asset, cursor=cursor)
h2c_deposit_address = lib.deposit_address(h2c_state)
h2c_deposit_balance = lib.get_balances(h2c_deposit_address,
assets=[asset])[asset]
if lib.is_expired(h2c_state, etc.expire_clearance):
continue # ignore if expires soon
if lib.has_unconfirmed_transactions(h2c_deposit_address):
continue # ignore if unconfirmed transaction inputs/outputs
if api.mpc_published_commits(state=h2c_state):
continue # ignore if h2c commit published
# fund hub to client if needed
deposit_max = terms["deposit_max"]
deposit_ratio = terms["deposit_ratio"]
if deposit_max:
target = min(deposit_max, c2h_deposit_balance) * deposit_ratio
else:
target = int(c2h_deposit_balance * deposit_ratio)
quantity = target - h2c_deposit_balance
if quantity > 0:
txid = lib.send_funds(h2c_deposit_address, asset, quantity)
deposits.append({
"txid": txid,
"asset": asset,
"address": h2c_deposit_address,
"quantity": quantity,
"handle": hub_connection["handle"]
})
return deposits
def fund_deposits():
"""Fund or top off open channels."""
with etc.database_lock:
deposits = []
cursor = sql.get_cursor()
for hub_connection in db.hub_connections_open(cursor=cursor):
asset = hub_connection["asset"]
terms = db.terms(id=hub_connection["terms_id"], cursor=cursor)
# load client to hub data
c2h_mpc_id = hub_connection["c2h_channel_id"]
c2h_state = db.load_channel_state(c2h_mpc_id, asset, cursor=cursor)
c2h_deposit_address = lib.deposit_address(c2h_state)
c2h_deposit_balance = lib.get_balances(c2h_deposit_address,
assets=[asset])[asset]
if c2h_deposit_balance < terms["deposit_min"]:
continue # ignore if client deposit insufficient
if lib.is_expired(c2h_state, etc.expire_clearance):
continue # ignore if expires soon
if lib.has_unconfirmed_transactions(c2h_deposit_address):
continue # ignore if unconfirmed transaction inputs/outputs
if api.mpc_published_commits(state=c2h_state):
continue # ignore if c2h commit published
# load hub to client data
h2c_mpc_id = hub_connection["h2c_channel_id"]
h2c_state = db.load_channel_state(h2c_mpc_id, asset, cursor=cursor)
h2c_deposit_address = lib.deposit_address(h2c_state)
h2c_deposit_balance = lib.get_balances(h2c_deposit_address,
assets=[asset])[asset]
if lib.is_expired(h2c_state, etc.expire_clearance):
continue # ignore if expires soon
if lib.has_unconfirmed_transactions(h2c_deposit_address):
continue # ignore if unconfirmed transaction inputs/outputs
if api.mpc_published_commits(state=h2c_state):
continue # ignore if h2c commit published
# fund hub to client if needed
deposit_max = terms["deposit_max"]
deposit_ratio = terms["deposit_ratio"]
if deposit_max:
target = min(deposit_max, c2h_deposit_balance) * deposit_ratio
else:
target = int(c2h_deposit_balance * deposit_ratio)
quantity = target - h2c_deposit_balance
if quantity > 0:
txid = lib.send_funds(h2c_deposit_address, asset, quantity)
deposits.append({
"txid": txid,
"asset": asset,
"address": h2c_deposit_address,
"quantity": quantity,
"handle": hub_connection["handle"]
})
return deposits
def publish_commits():
with etc.database_lock:
commit_rawtxs = []
cursor = sql.get_cursor()
for hub_connection in db.hub_connections_complete(cursor=cursor):
asset = hub_connection["asset"]
c2h_mpc_id = hub_connection["c2h_channel_id"]
c2h_state = db.load_channel_state(c2h_mpc_id, asset, cursor=cursor)
h2c_mpc_id = hub_connection["h2c_channel_id"]
h2c_state = db.load_channel_state(h2c_mpc_id, asset, cursor=cursor)
h2c_spend_secret_hash = get_deposit_spend_secret_hash(
h2c_state["deposit_script"]
)
h2c_spend_secret = lib.get_secret(h2c_spend_secret_hash)
c2h_expired = lib.is_expired(c2h_state, etc.expire_clearance)
h2c_expired = lib.is_expired(h2c_state, etc.expire_clearance)
expired = c2h_expired or h2c_expired
h2c_commits_published = api.mpc_published_commits(state=h2c_state)
closed = hub_connection["closed"] != 0
# connection expired or commit published or spend secret known
if expired or closed or h2c_commits_published or h2c_spend_secret:
if not closed:
db.set_connection_closed(handle=hub_connection["handle"])
rawtx = Mpc(api).finalize_commit(lib.get_wif, c2h_state)
if rawtx:
commit_rawtxs.append(rawtx)
return commit_rawtxs