def loopUntil_NewContract(query_intervall = 0.1):
"""
Wait for new smart contract to be deployed.
Continuously polls file "FILE_CONTRACT_ADDRESS".
Returns when overwritten file has different address or new filedate.
N.B.: It actually happens that same Ethereum contract address is created again,
if blockchain is deleted, and everything restarted. So: Check filedate too.
"""
address, _ = loadFromDisk()
when = os.path.getmtime(FILE_CONTRACT_ADDRESS)
print ("(filedate %d) last contract address: %s" %(when, address))
while(True):
time.sleep(query_intervall)
# checks whether a new contract has been deployed
# because then a new address has been saved to file:
newAddress, _ = loadFromDisk()
newWhen = os.path.getmtime(FILE_CONTRACT_ADDRESS)
if (newAddress != address or newWhen != when):
print ("(filedate %d) new contract address: %s" %(newWhen, newAddress))
break
return
def test_saveTo_and_loadFromDisk():
try: # try to preserve the original file content, if it exists:
address, abi = deploy.loadFromDisk()
except FileNotFoundError: # otherwise use dummy data
address = "0x95368440Aa0b1E90201942085e03eEccDb3dB3E1"
abi = ABI
answer = deploy.saveToDisk(address, abi)
assert answer == None
address2, abi2 = deploy.loadFromDisk()
assert address == address2
assert abi == abi2
def initialize_fromAddress():
"""
initialise contract object from address, stored in disk file by deploy.py
"""
contractAddress, abi = loadFromDisk()
myContract = w3.eth.contract(address=contractAddress, abi=abi)
return myContract