def exec_main_proc(self):
address = self.event['requestContext']['authorizer']['claims'].get(
'custom:private_eth_address')
# nonce を取得
if address is None:
# まだウォレットアドレスを作成していないユーザには 0 を返す
nonce = '0x0'
else:
nonce = PrivateChainUtil.get_transaction_count(address)
return {'statusCode': 200, 'body': json.dumps({'nonce': nonce})}
def test_get_transaction_count_ok(self):
test_address = '0x401BA17D89D795B3C6e373c5062F1C3F8979e73B'
test_url = 'https://' + os.environ['PRIVATE_CHAIN_EXECUTE_API_HOST'] + '/production/eth/get_transaction_count'
test_count = '0x10'
magic_lib = MagicMock(return_value=test_count)
with patch('private_chain_util.PrivateChainUtil.send_transaction', magic_lib):
result = PrivateChainUtil.get_transaction_count(test_address)
self.assertEqual(test_count, result)
_, kwargs = magic_lib.call_args
expect_payload = {
'from_user_eth_address': test_address
}
self.assertEqual(test_url, kwargs['request_url'])
self.assertEqual(expect_payload, kwargs['payload_dict'])
def exec_main_proc(self):
################
# get parameter
################
sort_key = TimeUtil.generate_sort_key()
from_user_eth_address = self.event['requestContext']['authorizer'][
'claims']['custom:private_eth_address']
user_id = self.event['requestContext']['authorizer']['claims'][
'cognito:username']
allowance = PrivateChainUtil.get_allowance(from_user_eth_address)
transaction_count = PrivateChainUtil.get_transaction_count(
from_user_eth_address)
################
# validation
################
# validate raw_transaction
# init_approve_signed_transaction
if int(allowance, 16) != 0:
# allowance が設定されている場合は必須
if self.params.get('init_approve_signed_transaction') is None:
raise ValidationError(
'init_approve_signed_transaction is invalid.')
# data
init_approve_data = PrivateChainUtil.get_data_from_raw_transaction(
self.params['init_approve_signed_transaction'],
transaction_count)
PrivateChainUtil.validate_erc20_approve_data(init_approve_data)
if int(init_approve_data[72:], 16) != 0:
raise ValidationError('Value of init_approve is invalid.')
transaction_count = PrivateChainUtil.increment_transaction_count(
transaction_count)
# approve_signed_transaction
approve_data = PrivateChainUtil.get_data_from_raw_transaction(
self.params['approve_signed_transaction'], transaction_count)
PrivateChainUtil.validate_erc20_approve_data(approve_data)
# 日次の限度額を超えていた場合は例外
sum_price = self.__get_token_send_value_today(user_id)
if Decimal(os.environ['DAILY_LIMIT_TOKEN_SEND_VALUE']
) < sum_price + Decimal(int(approve_data[72:], 16)):
raise ValidationError('Token withdrawal limit has been exceeded.')
transaction_count = PrivateChainUtil.increment_transaction_count(
transaction_count)
# relay_signed_transaction
relay_data = PrivateChainUtil.get_data_from_raw_transaction(
self.params['relay_signed_transaction'], transaction_count)
PrivateChainUtil.validate_erc20_relay_data(relay_data)
# approve と relay の value が同一であること
approve_value = int(approve_data[72:], 16)
relay_value = int(relay_data[72:], 16)
if approve_value != relay_value:
raise ValidationError('approve and relay values do not match.')
#######################
# send_raw_transaction
#######################
# 既に approve されている場合（allowance の戻り値が 0 ではない場合）、該当の approve を削除する（0 で更新）
if int(allowance, 16) != 0:
PrivateChainUtil.send_raw_transaction(
self.params.get('init_approve_signed_transaction'))
# approve 実施
approve_transaction_hash = PrivateChainUtil.send_raw_transaction(
self.params.get('approve_signed_transaction'))
self.__create_send_info_with_approve_transaction_hash(
sort_key, user_id, approve_transaction_hash, relay_value)
# token_send_table への書き込み完了後に出金関連の例外が発生した場合は、token_send_table のステータスを fail に更新する
try:
# relay 実施
relay_transaction_hash = PrivateChainUtil.send_raw_transaction(
self.params.get('relay_signed_transaction'))
self.__update_send_info_with_relay_transaction_hash(
sort_key, user_id, relay_transaction_hash)
# transaction の完了を確認
is_completed = PrivateChainUtil.is_transaction_completed(
relay_transaction_hash)
except SendTransactionError as e:
# ステータスを fail に更新し中断
self.__update_send_info_with_send_status(sort_key, user_id, 'fail')
raise e
except ReceiptError:
# send_value の値が残高を超えた場合や、処理最小・最大値の範囲に収まっていない場合に ReceiptError が発生するため
# ValidationError として処理を中断する
# ステータスを fail に更新
self.__update_send_info_with_send_status(sort_key, user_id, 'fail')
raise ValidationError('send_value')
# transaction が完了していた場合、ステータスを done に更新
if is_completed:
self.__update_send_info_with_send_status(sort_key, user_id, 'done')
return {
'statusCode': 200,
'body': json.dumps({'is_completed': is_completed})
}
def exec_main_proc(self):
################
# get parameter
################
# article info
article_info_table = self.dynamodb.Table(
os.environ['ARTICLE_INFO_TABLE_NAME'])
article_info = article_info_table.get_item(
Key={
'article_id': self.params['article_id']
}).get('Item')
# eth_address
from_user_eth_address = self.event['requestContext']['authorizer'][
'claims']['custom:private_eth_address']
to_user_eth_address = UserUtil.get_private_eth_address(
self.cognito, article_info['user_id'])
# transaction_count
transaction_count = PrivateChainUtil.get_transaction_count(
from_user_eth_address)
################
# validation
################
# does not tip same user
if article_info['user_id'] == self.event['requestContext'][
'authorizer']['claims']['cognito:username']:
raise ValidationError('Can not tip to myself')
# validate raw_transaction
# tip
tip_data = PrivateChainUtil.get_data_from_raw_transaction(
self.params['tip_signed_transaction'], transaction_count)
PrivateChainUtil.validate_erc20_transfer_data(tip_data,
to_user_eth_address)
# burn
transaction_count = PrivateChainUtil.increment_transaction_count(
transaction_count)
burn_data = PrivateChainUtil.get_data_from_raw_transaction(
self.params['burn_signed_transaction'], transaction_count)
PrivateChainUtil.validate_erc20_transfer_data(
burn_data, '0x' + os.environ['BURN_ADDRESS'])
# burn 量が正しいこと
tip_value = int(tip_data[72:], 16)
burn_value = int(burn_data[72:], 16)
calc_burn_value = int(Decimal(tip_value) / Decimal(10))
if burn_value != calc_burn_value:
raise ValidationError('burn_value is invalid.')
# 残高が足りていること
if not self.__is_burnable_user(from_user_eth_address, tip_value,
burn_value):
raise ValidationError('Required at least {token} token'.format(
token=tip_value + burn_value))
#######################
# send_raw_transaction
#######################
transaction_hash = PrivateChainUtil.send_raw_transaction(
self.params['tip_signed_transaction'])
burn_transaction = None
try:
# 投げ銭が成功した時のみバーン処理を行う
if PrivateChainUtil.is_transaction_completed(transaction_hash):
# バーンのトランザクション処理
burn_transaction = PrivateChainUtil.send_raw_transaction(
self.params['burn_signed_transaction'])
else:
logging.info(
'Burn was not executed because tip transaction was uncompleted.'
)
except Exception as err:
logging.fatal(err)
traceback.print_exc()
finally:
# create tip info
self.__create_tip_info(transaction_hash, tip_value,
burn_transaction, article_info)
return {'statusCode': 200}
def exec_main_proc(self):
################
# get parameter
################
# get article info
article_info_table = self.dynamodb.Table(
os.environ['ARTICLE_INFO_TABLE_NAME'])
article_info = article_info_table.get_item(
Key={
'article_id': self.params['article_id']
}).get('Item')
# purchase article
paid_articles_table = self.dynamodb.Table(
os.environ['PAID_ARTICLES_TABLE_NAME'])
paid_status_table = self.dynamodb.Table(
os.environ['PAID_STATUS_TABLE_NAME'])
# eth_address
article_user_eth_address = UserUtil.get_private_eth_address(
self.cognito, article_info['user_id'])
user_eth_address = self.event['requestContext']['authorizer'][
'claims']['custom:private_eth_address']
# transaction_count
transaction_count = PrivateChainUtil.get_transaction_count(
user_eth_address)
################
# validation
################
# does not purchase same user's article
user_id = self.event['requestContext']['authorizer']['claims'][
'cognito:username']
if article_info['user_id'] == user_id:
raise ValidationError('Can not purchase own article')
# validate raw_transaction
# purchase
purchase_data = PrivateChainUtil.get_data_from_raw_transaction(
self.params['purchase_signed_transaction'], transaction_count)
PrivateChainUtil.validate_erc20_transfer_data(
purchase_data, article_user_eth_address)
# burn
transaction_count = PrivateChainUtil.increment_transaction_count(
transaction_count)
burn_data = PrivateChainUtil.get_data_from_raw_transaction(
self.params['burn_signed_transaction'], transaction_count)
PrivateChainUtil.validate_erc20_transfer_data(
burn_data, '0x' + os.environ['BURN_ADDRESS'])
# burn 量が正しいこと
purchase_value = int(purchase_data[72:], 16)
burn_value = int(burn_data[72:], 16)
calc_burn_value = int(Decimal(purchase_value) / Decimal(9))
if burn_value != calc_burn_value:
raise ValidationError('burn_value is invalid.')
# purchase_value が記事で指定されている金額に基づいた量が設定されていること
DBUtil.validate_latest_price(self.dynamodb, self.params['article_id'],
purchase_value)
################
# purchase
################
sort_key = TimeUtil.generate_sort_key()
# 多重リクエストによる不必要なレコード生成を防ぐためにpaid_statusレコードを生成
self.__create_paid_status(paid_status_table, user_id)
# 購入のトランザクション処理
purchase_transaction = PrivateChainUtil.send_raw_transaction(
self.params['purchase_signed_transaction'])
# 購入記事データを作成
self.__create_paid_article(paid_articles_table, article_info,
purchase_transaction, sort_key)
# プライベートチェーンへのポーリングを行いトランザクションの承認状態を取得
transaction_status = self.__polling_to_private_chain(
purchase_transaction)
# トランザクションの承認状態をpaid_articleとpaid_statusに格納
self.__update_transaction_status(article_info, paid_articles_table,
transaction_status, sort_key,
paid_status_table, user_id)
# 購入のトランザクションが成功した時のみバーンのトランザクションを発行する
if transaction_status == 'done':
try:
# 購入に成功した場合、著者の未読通知フラグをTrueにする
self.__update_unread_notification_manager(
article_info['user_id'])
# 著者へ通知を作成
self.__notify_author(article_info, user_id)
# バーンのトランザクション処理
burn_transaction = PrivateChainUtil.send_raw_transaction(
self.params['burn_signed_transaction'])
# バーンのトランザクションを購入テーブルに格納
self.__add_burn_transaction_to_paid_article(
burn_transaction, paid_articles_table, article_info,
sort_key)
except Exception as err:
logging.fatal(err)
traceback.print_exc()
# 記事購入者へは購入処理中の場合以外で通知を作成
if transaction_status == 'done' or transaction_status == 'fail':
self.__update_unread_notification_manager(user_id)
self.__notify_purchaser(article_info, user_id, transaction_status)
return {
'statusCode': 200,
'body': json.dumps({'status': transaction_status})
}