def validate_params(self):
UserUtil.verified_phone_and_email(self.event)
# single
# check price type is integer or decimal
try:
self.params['price'] = int(self.params['price'])
except ValueError:
raise ValidationError('Price must be integer')
# check price value is not decimal
price = self.params['price'] / 10**18
if price.is_integer() is False:
raise ValidationError('Decimal value is not allowed')
validate(self.params, self.get_schema())
# relation
DBUtil.validate_article_existence(self.dynamodb,
self.params['article_id'],
status='public')
DBUtil.validate_latest_price(self.dynamodb, self.params['article_id'],
self.params['price'])
DBUtil.validate_not_purchased(
self.dynamodb, self.params['article_id'],
self.event['requestContext']['authorizer']['claims']
['cognito:username'])
def test_validate_latest_price_ng(self):
with self.assertRaises(ValidationError):
price = 1000 * (10 ** 18)
DBUtil.validate_latest_price(
self.dynamodb,
'testid000003',
price
)
def test_validate_latest_price_ok(self):
price = 1 * (10**18)
self.assertTrue(
DBUtil.validate_latest_price(self.dynamodb, 'testid000003', price))
def test_validate_latest_price_ok(self):
price = int(1 * (10 ** 18) * Decimal(9) / Decimal(10))
self.assertTrue(DBUtil.validate_latest_price(self.dynamodb, 'testid000003', price))
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})
}
