def on_openchannel(openchannel2, plugin, **kwargs):
# We mirror what the peer does, wrt to funding amount ...
amount = Millisatoshi(openchannel2['their_funding'])
locktime = openchannel2['locktime']
if amount > plugin.max_fund:
plugin.log("amount adjusted from {} to {}".format(
amount, plugin.max_fund))
amount = plugin.max_fund
if amount == 0:
plugin.log("accepter_max_funding set to zero")
return {'result': 'continue'}
# ...unless they send us totally unacceptable feerates.
feerate = find_feerate(openchannel2['funding_feerate_best'],
openchannel2['funding_feerate_min'],
openchannel2['funding_feerate_max'],
openchannel2['feerate_our_min'],
openchannel2['feerate_our_max'])
# Their feerate range is out of bounds, we're not going to
# participate.
if not feerate:
plugin.log("Declining to fund, no feerate found.")
return {'result': 'continue'}
funding = plugin.rpc.fundpsbt(
int(amount.to_satoshi()),
'{}perkw'.format(feerate),
0, # because we're the accepter!!
reserve=True,
locktime=locktime,
minconf=0,
min_witness_weight=110)
psbt_obj = psbt_from_base64(funding['psbt'])
excess = Millisatoshi(funding['excess_msat'])
change_cost = Millisatoshi(124 * feerate)
dust_limit = Millisatoshi(253 * 1000)
if excess > (dust_limit + change_cost):
addr = plugin.rpc.newaddr()['bech32']
change = excess - change_cost
output = tx_output_init(change.to_whole_satoshi(), get_script(addr))
psbt_add_output_at(psbt_obj, 0, 0, output)
psbt = psbt_to_base64(psbt_obj, 0)
add_inflight(plugin, openchannel2['id'], openchannel2['channel_id'], psbt)
plugin.log("contributing {} at feerate {}".format(amount, feerate))
return {
'result': 'continue',
'psbt': psbt,
'accepter_funding_msat': amount,
'funding_feerate': feerate
}
def test_floats():
# test parsing amounts from floating number strings
amount = Millisatoshi("0.01btc")
assert amount.to_satoshi() == 10**6
amount = Millisatoshi("1.01btc")
assert amount.to_satoshi() == 10**8 + 10**6
amount = Millisatoshi("0.1sat")
assert int(amount) == 100
amount = Millisatoshi("0.01sat")
assert int(amount) == 10
amount = Millisatoshi("1.1sat")
assert int(amount) == 1100
# test floating point arithmetic
amount = Millisatoshi("1000msat") * 0.1
assert int(amount) == 100
amount = Millisatoshi("100msat") * 0.1
assert int(amount) == 10
amount = Millisatoshi("10msat") * 0.1
assert int(amount) == 1
def test_floats():
# test parsing amounts from floating number strings
amount = Millisatoshi("0.01btc")
assert amount.to_satoshi() == 10**6
amount = Millisatoshi("1.01btc")
assert amount.to_satoshi() == 10**8 + 10**6
amount = Millisatoshi("0.1sat")
assert int(amount) == 100
amount = Millisatoshi("0.01sat")
assert int(amount) == 10
amount = Millisatoshi("1.1sat")
assert int(amount) == 1100
# test floating point arithmetic
amount = Millisatoshi("1000msat") * 0.1
assert int(amount) == 100
# sub millisatoshi are not a concept yet
with pytest.raises(ValueError, match='Millisatoshi must be a whole number'):
amount = Millisatoshi("0.000000000001btc")
with pytest.raises(ValueError, match='Millisatoshi must be a whole number'):
amount = Millisatoshi("0.0001sat")
with pytest.raises(ValueError, match='Millisatoshi must be a whole number'):
amount = Millisatoshi("0.1msat")
def on_openchannel(openchannel2, plugin, **kwargs):
# We mirror what the peer does, wrt to funding amount ...
amount = Millisatoshi(openchannel2['their_funding'])
locktime = openchannel2['locktime']
if amount > plugin.max_fund:
plugin.log("amount adjusted from {} to {}".format(
amount, plugin.max_fund))
amount = plugin.max_fund
if amount == 0:
plugin.log("accepter_max_funding set to zero")
return {'result': 'continue'}
# ...unless they send us totally unacceptable feerates.
feerate = find_feerate(openchannel2['funding_feerate_best'],
openchannel2['funding_feerate_min'],
openchannel2['funding_feerate_max'],
openchannel2['feerate_our_min'],
openchannel2['feerate_our_max'])
# Their feerate range is out of bounds, we're not going to
# participate.
if not feerate:
plugin.log("Declining to fund, no feerate found.")
return {'result': 'continue'}
funding = plugin.rpc.fundpsbt(
int(amount.to_satoshi()),
'{}perkw'.format(feerate),
0, # because we're the accepter!!
reserve=True,
locktime=locktime,
minconf=0,
min_witness_weight=110,
excess_as_change=True)
add_inflight(plugin, openchannel2['id'], openchannel2['channel_id'],
funding['psbt'])
plugin.log("contributing {} at feerate {}".format(amount, feerate))
return {
'result': 'continue',
'psbt': funding['psbt'],
'accepter_funding_msat': amount,
'funding_feerate': feerate
}
