def recycle_accounts(nonce: int):
logging.debug('Recycling Accounts')
dynamodb = boto3.resource('dynamodb')
recycle_table = dynamodb.Table(os.environ['RECYCLE_TABLE_NAME'])
response = recycle_table.scan()
for item in response['Items']:
funder = item['funder']
signer = item['signer']
unlock = item.get('unlock', 0)
logging.debug(f'Processing item: Funder: {funder} Signer: {signer} Unlock: {unlock}')
amount, escrow, actual_unlock = look(funder, signer)
latest_block = get_latest_block()
logging.debug(f'Actual Unlock: {actual_unlock}')
if unlock != actual_unlock:
logging.debug(f'Updating unlock from {unlock} to {actual_unlock}')
store_account(funder, signer, actual_unlock)
if actual_unlock == 0:
logging.debug('Account is still locked')
warn(signer, nonce)
nonce += 1
elif actual_unlock - 1 < latest_block['timestamp']:
logging.debug(
f'Account ({signer}) is unlocked ({unlock - 1} < {latest_block["timestamp"]}). '
'Initiating pull()'
)
pull(
signer=signer,
target=funder,
autolock=True,
amount=amount,
escrow=escrow,
nonce=nonce,
)
nonce += 1
# kill(
# signer=signer,
# nonce=nonce,
# )
# nonce += 1
delete_account(signer=signer)
else:
logging.debug(f'Account ({signer}) is still in the process of unlocking.')
def main(event, context):
stage = os.environ['STAGE']
body = json.loads(event.get('body', {}))
if is_true(body.get('debug', '')):
configure_logging(level="DEBUG")
logging.debug(f'recycle() stage:{stage}')
logging.debug(f'event: {event}')
logging.debug(f'context: {context}')
logging.debug(f'body: {body}')
funder = toChecksumAddress(address=body.get('funder', ''))
signer = toChecksumAddress(address=body.get('signer', ''))
password = body.get('password', '')
if password != get_secret(key=os.environ['RECYCLE_KEY']):
return incorrect_password()
pac_funder = get_secret(key=os.environ['PAC_FUNDER_PUBKEY_SECRET'])
if funder != pac_funder:
return invalid_funder(funder, pac_funder)
funder_keys = keys(funder)
if signer == '' or signer not in funder_keys:
return invalid_signer(signer)
amount, escrow, unlock = look(funder, signer)
amount_threshold = float("inf")
escrow_threshold = float("inf")
if amount > amount_threshold:
return amount_too_high(amount, amount_threshold)
if escrow > escrow_threshold:
return escrow_too_high(escrow, escrow_threshold)
store_account(funder, signer, unlock)
return account_queued_response()
def get_account_(
price: float,
blocknum: int) -> Tuple[Optional[str], Optional[str], Optional[str]]:
logging.debug(f'get_account_ price:{price}')
dynamodb = boto3.resource('dynamodb')
table = dynamodb.Table(os.environ['TABLE_NAME'])
response = random_scan(table, price)
ret = None
signer_pubkey = '0xTODO'
epoch_time = int(time.time())
for item in response['Items']:
if float(price) == float(item['price']):
signer_pubkey = item['signer']
config = item['config']
push_txn_hash = item['push_txn_hash']
creation_etime = item.get('creation_etime', 0)
age = epoch_time - creation_etime
if is_true(os.environ['DOUBLE_CHECK_ACCOUNTS']):
old_status = item['status']
status = get_transaction_status(push_txn_hash, blocknum)
if old_status != status:
logging.warning(
f'DynamoDB status of {old_status} for {push_txn_hash} '
f'does not match new status of {status}!')
else:
status = item['status']
if ((status != 'confirmed')
and (age < 10 * 60 * 60)): # 10 hour grace period
logging.debug(
f'Skipping account ({push_txn_hash}) with status: {status} age: {age}'
)
continue
logging.debug(
f'Found potential account ({push_txn_hash}) status: {status} age:{age} config: {config}'
)
key = {
'price': item['price'],
'signer': signer_pubkey,
}
delete_response = table.delete_item(Key=key,
ReturnValues='ALL_OLD')
if (delete_response['Attributes'] is not None
and len(delete_response['Attributes']) > 0):
balance, escrow, _ = look(
funder=get_secret(
key=os.environ['PAC_FUNDER_PUBKEY_SECRET']),
signer=signer_pubkey,
)
# update succeeded
if ((status == 'confirmed') and (escrow > get_min_escrow())):
ret = push_txn_hash, config, signer_pubkey
break
else:
logging.debug(
f'broken account: {push_txn_hash} status: {status} age: {age} '
f'balance: {balance} deleted and skipped')
else:
logging.debug('Account was already deleted!')
if ret:
return ret
return None, None, None