AaronFiore/electrum
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dynamic fees

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This commit is contained in:
ThomasV
2015-08-04 07:15:54 +02:00
parent 959620db46
commit 43880d452e
12 changed files with 81 additions and 36 deletions
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30
lib/wallet.py
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@@ -143,6 +143,7 @@ class Abstract_Wallet(object):
"""
def __init__(self, storage):
self.storage = storage
self.network = None
self.electrum_version = ELECTRUM_VERSION
self.gap_limit_for_change = 6 # constant
# saved fields
@@ -153,9 +154,7 @@ class Abstract_Wallet(object):
self.labels = storage.get('labels', {})
self.frozen_addresses = set(storage.get('frozen_addresses',[]))
self.stored_height = storage.get('stored_height', 0) # last known height (for offline mode)
self.history = storage.get('addr_history',{}) # address -> list(txid, height)
self.fee_per_kb = int(storage.get('fee_per_kb', RECOMMENDED_FEE))
# This attribute is set when wallet.start_threads is called.
self.synchronizer = None
@@ -674,10 +673,6 @@ class Abstract_Wallet(object):
xx += x
return cc, uu, xx
def set_fee(self, fee, save = True):
self.fee_per_kb = fee
self.storage.put('fee_per_kb', self.fee_per_kb, save)
def get_address_history(self, address):
with self.lock:
return self.history.get(address, [])
@@ -873,23 +868,30 @@ class Abstract_Wallet(object):
return ', '.join(labels)
return ''
def fee_per_kb(self, config):
b = config.get('dynamic_fees')
f = config.get('fee_factor', 50)
F = config.get('fee_per_kb', bitcoin.RECOMMENDED_FEE)
return min(F, self.network.fee*(50 + f)/100) if b and self.network and self.network.fee else F
def get_tx_fee(self, tx):
# this method can be overloaded
return tx.get_fee()
def estimated_fee(self, tx):
def estimated_fee(self, tx, fee_per_kb):
estimated_size = len(tx.serialize(-1))/2
fee = int(self.fee_per_kb*estimated_size/1000.)
fee = int(fee_per_kb * estimated_size / 1000.)
if fee < MIN_RELAY_TX_FEE: # and tx.requires_fee(self):
fee = MIN_RELAY_TX_FEE
return fee
def make_unsigned_transaction(self, coins, outputs, fixed_fee=None, change_addr=None):
def make_unsigned_transaction(self, coins, outputs, config, fixed_fee=None, change_addr=None):
# check outputs
for type, data, value in outputs:
if type == 'address':
assert is_address(data), "Address " + data + " is invalid!"
fee_per_kb = self.fee_per_kb(config)
amount = sum(map(lambda x:x[2], outputs))
total = fee = 0
inputs = []
@@ -903,7 +905,7 @@ class Abstract_Wallet(object):
# no need to estimate fee until we have reached desired amount
if total < amount:
continue
fee = fixed_fee if fixed_fee is not None else self.estimated_fee(tx)
fee = fixed_fee if fixed_fee is not None else self.estimated_fee(tx, fee_per_kb)
if total >= amount + fee:
break
else:
@@ -914,7 +916,7 @@ class Abstract_Wallet(object):
if total - v >= amount + fee:
tx.inputs.remove(item)
total -= v
fee = fixed_fee if fixed_fee is not None else self.estimated_fee(tx)
fee = fixed_fee if fixed_fee is not None else self.estimated_fee(tx, fee_per_kb)
else:
break
print_error("using %d inputs"%len(tx.inputs))
@@ -943,7 +945,7 @@ class Abstract_Wallet(object):
elif change_amount > DUST_THRESHOLD:
tx.outputs.append(('address', change_addr, change_amount))
# recompute fee including change output
fee = self.estimated_fee(tx)
fee = self.estimated_fee(tx, fee_per_kb)
# remove change output
tx.outputs.pop()
# if change is still above dust threshold, re-add change output.
@@ -962,9 +964,9 @@ class Abstract_Wallet(object):
run_hook('make_unsigned_transaction', tx)
return tx
def mktx(self, outputs, password, fee=None, change_addr=None, domain=None):
def mktx(self, outputs, password, config, fee=None, change_addr=None, domain=None):
coins = self.get_spendable_coins(domain)
tx = self.make_unsigned_transaction(coins, outputs, fee, change_addr)
tx = self.make_unsigned_transaction(coins, outputs, config, fee, change_addr)
self.sign_transaction(tx, password)
return tx