class ItemServer():
""" An issuer of items, among other things...
It also maintains the heavy data structures and interfaces."""
def __init__(self,
key_name,
btc_proxy='http://*****:*****@localhost:19001',
lineage_filename='lineage.pickle'):
if pp_keys.ExportPubKey(key_name) == '':
raise Exception('Unknown key name ' + key_name)
self.key_name = key_name
self.btc = ServiceProxy(btc_proxy)
self.btc.getinfo() # Will raise an exception if we aren't connected
# Load user accounts
try:
self.user_account = cPickle.load(file(USER_ACCOUNT_FILENAME))
except:
logging.info('Starting with empty user accounts')
self.user_account = {}
# Load lineage
try:
self.lineage = cPickle.load(file(lineage_filename))
except:
logging.info('Starting with empty lineage')
self.lineage = pp_lineage.Lineage()
logging.info('Loading block chain from' + BLOCK_DIRECTORY)
self.lineage.UpdateDir(BLOCK_DIRECTORY)
# Save the updated lineage (only at __init__).
logging.info('Saving updated lineage...')
cPickle.dump(self.lineage, file(lineage_filename, 'w'), -1)
def CreateAccount(self, password):
""" Clients create a new account by making a payment to an address. """
new_address = self.btc.getnewaddress()
self.user_account[new_address] = password
# Save the user accounts to disk.
cPickle.dump(self.user_account, file('user_account.pickle', 'w'), -1)
return new_address
def VerifyAccount(self, btc_address, password, proof_sig):
""" Clients log in by verifying their payment to a btc_address. """
# TODO: add a day-stamp to the text?
if not btc_address in self.user_account:
logging.warning('Unknown btc_address %s' % btc_address)
return False
if self.user_account[btc_address] != password:
logging.warning('Password does not match for account %s' %
btc_address)
return False
MIN_ACCOUNT_AMOUNT = 0.001
account_amount = self.btc.getreceivedbyaddress(btc_address, 1)
if account_amount < MIN_ACCOUNT_AMOUNT:
logging.warning('Address %s not sufficiently funded %f < %f' %
(btc_address, account_amount, MIN_ACCOUNT_AMOUNT))
return False
# TODO: actually verify that they can prove they made the (first?) payment.
#return self.btc.verifymessage(btc_address, proof_sig, self.key_name)
return True
def Create(self, item_name, content):
item = Item(item_name, content, self.key_name)
return item
def GrantToKey(self, item, key_name):
""" Give an item to a particular owner: non-transferrable. """
if item.creator_key_name != self.key_name:
logging.warning('This server is not the creator of the item %s' %
item)
return None
if item.owner_key_name != '':
logging.warning('This item has already been granted')
return None
item.owner_key_name = key_name
# Sign the item to make it official.
item.signature = pp_keys.Sign(item.signed_content(), self.key_name)
return item
def GrantToAddress(self, item, address, btc_value=0.01):
""" Give an item to a bitcoin address: transferrable. """
if item.creator_key_name != self.key_name:
logging.warning('This server is not the creator of the item %s' %
item)
return None
if item.origin_tx_id != '':
logging.warning('This item has already been granted')
return None
item.origin_tx_id = self.btc.sendtoaddress(address, btc_value)
item.last_tx_id = item.origin_tx_id
# Sign the item to make it official.
item.signature = pp_keys.Sign(item.signed_content(), self.key_name)
return item
def Transfer(self, item, address, min_btc_confirmations=6, btc_fee=0.0005):
if item.last_tx_id == '':
print 'This item is not transferrable (no last tx id)'
return False
# NOTE: we assume the btc server knows of this this transaction because the
# user is the owner of the item.
last_tx = self.btc.gettransaction(item.last_tx_id)
value = float(last_tx['amount'])
confirmations = last_tx['confirmations']
if confirmations < min_btc_confirmations:
print 'Not enough confirmations of last_tx:',
print confirmations, '<', min_btc_confirmations
return False
# For the initial grant TX, vout will be 1, otherwise 0.
vout = 0
if (item.origin_tx_id == item.last_tx_id): vout = 1
raw_tx = self.btc.createrawtransaction([{
"txid": item.last_tx_id,
"vout": vout
}], {address: value - btc_fee})
signed = self.btc.signrawtransaction(raw_tx)
if signed['complete']:
item.last_tx_id = self.btc.sendrawtransaction(signed['hex'])
return True
return False
def Verify(self, item, proof_sig):
""" Verify the integrity and ownership of the item:
1) The serialized item is properly signed,
2) and that the claimed owner also controls the heir bitcoin. """
# TODO: Check that the last tx has sufficient confirmations.
# TODO: Support non-transferrable items.
if item.origin_tx_id == '' or item.last_tx_id == '' or item.signature == '':
print 'This item has not been granted'
return False
if not pp_keys.FindAndImportVerifiedKey(item.creator_key_name):
print 'Could not find item creator key', item.creator_key_name
return False
if not pp_keys.Verify(item.signed_content(), item.signature):
print 'Could not verify item signature'
return False
self.lineage.UpdateAll()
if not self.lineage.VerifyLineage(item.last_tx_id, item.origin_tx_id):
print 'Could not verify item lineage'
return False
last_address = self.lineage.GetOutputAddress(item.last_tx_id)
if not last_address:
print 'Could not find last tx output address'
return False
last_address_verified = self.btc.verifymessage(last_address, proof_sig,
self.key_name)
if not last_address_verified:
print 'Could not verify ownership of last tx output address'
return False
return True
def GenerateProofSig(self, item, target):
""" Prove that this server owns the output of last_tx_id. """
self.lineage.UpdateAll()
last_address = self.lineage.GetOutputAddress(item.last_tx_id)
if not last_address:
print 'Could not find last tx output address'
return ''
proof_sig = self.btc.signmessage(last_address, target)
return proof_sig
def createrawtransaction(in_array,out_set): bitcoin = ServiceProxy(BITCOINRPC) try: data=bitcoin.createrawtransaction(in_array,out_set) except JSONRPCException, e: return (False, "Error: %s" % e.error['message'])
def createrawtransaction(in_array, out_set):
bitcoin = ServiceProxy(BITCOINRPC)
try:
data = bitcoin.createrawtransaction(in_array, out_set)
except JSONRPCException, e:
return (False, "Error: %s" % e.error['message'])
print (' Script %s has %d txins and %s BTC value.'%(script,scripts[script][2],str(scripts[script][1])))
out={}
na=amt-min_fee
#One new output per 100 BTC of value to avoid consolidating too much value in too few addresses.
# But don't add an extra output if it would have less than 10 BTC.
while na>0:
amount=min(Decimal(100),na)
if ((na-amount)<10):
amount=na
addr=b.getnewaddress('consolidate')
#omg wtf, this is awful. the python-bitcoin crap makes the argument be a float
if (Decimal(str(float(amount)))>0):
if addr not in out:
out[addr]=float(0)
out[addr]+=float(amount)
na-=Decimal(str(float(amount)))
print ('Paying %s BTC (%s fee) to:'%(sum([Decimal(str(out[k])) for k in out.keys()]),amt-sum([Decimal(str(out[k])) for k in out.keys()])))
for o in out.keys():
print (' %s %s'%(o,out[o]))
txn=b.createrawtransaction(txouts,out)
print ('\nRaw transaction, sign with signrawtransaction then send with sendrawtransaction:')
print ('If, after signing, transaction is too large (e.g. >20,000 character) you may need to provide a fee or it will be rejected by bitcoin.\n')
print (txn)
#This could sign and send the transaction, but better to let the user do it.
# txn=b.signrawtransaction(txn)
# print (txn)
# print ('Bytes: %d Fee: %s'%(len(txn['hex'])/2,amt-sum([Decimal(str(out[x])) for x in out.keys()])))
while na > 0:
amount = min(Decimal(100), na)
if ((na - amount) < 10):
amount = na
addr = b.getnewaddress('consolidate')
#omg wtf, this is awful. the python-bitcoin crap makes the argument be a float
if (Decimal(str(float(amount))) > 0):
if addr not in out:
out[addr] = float(0)
out[addr] += float(amount)
na -= Decimal(str(float(amount)))
print('Paying %s BTC (%s fee) to:' %
(sum([Decimal(str(out[k])) for k in out.keys()
]), amt - sum([Decimal(str(out[k])) for k in out.keys()])))
for o in out.keys():
print(' %s %s' % (o, out[o]))
txn = b.createrawtransaction(txouts, out)
print(
'\nRaw transaction, sign with signrawtransaction then send with sendrawtransaction:'
)
print(
'If, after signing, transaction is too large (e.g. >20,000 character) you may need to provide a fee or it will be rejected by bitcoin.\n'
)
print(txn)
#This could sign and send the transaction, but better to let the user do it.
# txn=b.signrawtransaction(txn)
# print (txn)
# print ('Bytes: %d Fee: %s'%(len(txn['hex'])/2,amt-sum([Decimal(str(out[x])) for x in out.keys()])))
class ItemServer():
""" An issuer of items, among other things...
It also maintains the heavy data structures and interfaces."""
def __init__(self,
key_name,
btc_proxy = 'http://*****:*****@localhost:19001',
lineage_filename = 'lineage.pickle'):
if pp_keys.ExportPubKey(key_name) == '':
raise Exception('Unknown key name ' + key_name)
self.key_name = key_name
self.btc = ServiceProxy(btc_proxy)
self.btc.getinfo() # Will raise an exception if we aren't connected
# Load user accounts
try:
self.user_account = cPickle.load(file(USER_ACCOUNT_FILENAME))
except:
logging.info('Starting with empty user accounts')
self.user_account= {}
# Load lineage
try:
self.lineage = cPickle.load(file(lineage_filename))
except:
logging.info('Starting with empty lineage')
self.lineage = pp_lineage.Lineage()
logging.info('Loading block chain from' + BLOCK_DIRECTORY)
self.lineage.UpdateDir(BLOCK_DIRECTORY)
# Save the updated lineage (only at __init__).
logging.info('Saving updated lineage...')
cPickle.dump(self.lineage, file(lineage_filename, 'w'), -1)
def CreateAccount(self, password):
""" Clients create a new account by making a payment to an address. """
new_address = self.btc.getnewaddress()
self.user_account[new_address] = password
# Save the user accounts to disk.
cPickle.dump(self.user_account, file('user_account.pickle', 'w'), -1)
return new_address
def VerifyAccount(self, btc_address, password, proof_sig):
""" Clients log in by verifying their payment to a btc_address. """
# TODO: add a day-stamp to the text?
if not btc_address in self.user_account:
logging.warning('Unknown btc_address %s' % btc_address)
return False
if self.user_account[btc_address] != password:
logging.warning('Password does not match for account %s' % btc_address)
return False
MIN_ACCOUNT_AMOUNT = 0.001
account_amount = self.btc.getreceivedbyaddress(btc_address, 1)
if account_amount < MIN_ACCOUNT_AMOUNT:
logging.warning('Address %s not sufficiently funded %f < %f' %
(btc_address, account_amount, MIN_ACCOUNT_AMOUNT))
return False
# TODO: actually verify that they can prove they made the (first?) payment.
#return self.btc.verifymessage(btc_address, proof_sig, self.key_name)
return True
def Create(self, item_name, content):
item = Item(item_name, content, self.key_name)
return item
def GrantToKey(self, item, key_name):
""" Give an item to a particular owner: non-transferrable. """
if item.creator_key_name != self.key_name:
logging.warning('This server is not the creator of the item %s' % item)
return None
if item.owner_key_name != '':
logging.warning('This item has already been granted')
return None
item.owner_key_name = key_name
# Sign the item to make it official.
item.signature = pp_keys.Sign(item.signed_content(), self.key_name)
return item
def GrantToAddress(self, item, address, btc_value=0.01):
""" Give an item to a bitcoin address: transferrable. """
if item.creator_key_name != self.key_name:
logging.warning('This server is not the creator of the item %s' % item)
return None
if item.origin_tx_id != '':
logging.warning('This item has already been granted')
return None
item.origin_tx_id = self.btc.sendtoaddress(address, btc_value)
item.last_tx_id = item.origin_tx_id
# Sign the item to make it official.
item.signature = pp_keys.Sign(item.signed_content(), self.key_name)
return item
def Transfer(self, item, address, min_btc_confirmations=6, btc_fee=0.0005):
if item.last_tx_id == '':
print 'This item is not transferrable (no last tx id)'
return False
# NOTE: we assume the btc server knows of this this transaction because the
# user is the owner of the item.
last_tx = self.btc.gettransaction(item.last_tx_id)
value = float(last_tx['amount'])
confirmations = last_tx['confirmations']
if confirmations < min_btc_confirmations:
print 'Not enough confirmations of last_tx:',
print confirmations, '<', min_btc_confirmations
return False
# For the initial grant TX, vout will be 1, otherwise 0.
vout = 0
if (item.origin_tx_id == item.last_tx_id): vout = 1
raw_tx = self.btc.createrawtransaction(
[{"txid":item.last_tx_id, "vout":vout}], {address:value - btc_fee})
signed = self.btc.signrawtransaction(raw_tx)
if signed['complete']:
item.last_tx_id = self.btc.sendrawtransaction(signed['hex'])
return True
return False
def Verify(self, item, proof_sig):
""" Verify the integrity and ownership of the item:
1) The serialized item is properly signed,
2) and that the claimed owner also controls the heir bitcoin. """
# TODO: Check that the last tx has sufficient confirmations.
# TODO: Support non-transferrable items.
if item.origin_tx_id == '' or item.last_tx_id == '' or item.signature == '':
print 'This item has not been granted'
return False
if not pp_keys.FindAndImportVerifiedKey(item.creator_key_name):
print 'Could not find item creator key', item.creator_key_name
return False
if not pp_keys.Verify(item.signed_content(), item.signature):
print 'Could not verify item signature'
return False
self.lineage.UpdateAll()
if not self.lineage.VerifyLineage(item.last_tx_id, item.origin_tx_id):
print 'Could not verify item lineage'
return False
last_address = self.lineage.GetOutputAddress(item.last_tx_id)
if not last_address:
print 'Could not find last tx output address'
return False
last_address_verified = self.btc.verifymessage(
last_address, proof_sig, self.key_name)
if not last_address_verified:
print 'Could not verify ownership of last tx output address'
return False
return True
def GenerateProofSig(self, item, target):
""" Prove that this server owns the output of last_tx_id. """
self.lineage.UpdateAll()
last_address = self.lineage.GetOutputAddress(item.last_tx_id)
if not last_address:
print 'Could not find last tx output address'
return ''
proof_sig = self.btc.signmessage(last_address, target)
return proof_sig
