گزارش تغییرناپذیری داده¶
Tax authorities in some countries require companies to prove their posted accounting entries are inalterable, meaning that once an entry has been posted, it can no longer be changed.
To do so, Odoo can use the SHA-256 algorithm to create a unique fingerprint for each posted
entry. This fingerprint is called a hash. The hash is generated by taking an entry's essential data
(the values of the name, date, journal_id, company_id, debit, credit, account_id, and
partner_id fields), concatenating it, and inputting it to the SHA-256 hash function, which then
outputs a fixed size (256-bit) string of characters. The hash function is deterministic (the
same input always creates the same output): any minor modification to the original data would
completely change the resulting hash. Consequently, the SHA-256 algorithm is often used, among
others, for data integrity verification purposes.
In addition, the previous entry's hash is always added to the next entry to form a hash chain. This is used to ensure a new entry is not added afterward between two posted entries, as doing so would break the hash chain.
توجه
هشهای تولیدی الگوریتم SHA-256 به لحاظ نظری منحصر به فرد نیستند، چرا که تعداد مقادیر خروجی محدود است. با این حال این عدد شدیداً بالاست (2²⁵⁶) و تعداد آن بسیار بیشتر از اتمهای شناسایی شده در جهان شناخته شده است. برای همین است که هشها در عمل منحصر به فرد در نظر گرفته میشوند.
Lock posted entries with hash¶
To start using the hashing function, go to . Open the journal for which you want to activate the feature, go to the Advanced Settings tab, and enable Lock Posted Entries with Hash.
هشدار
Once you post an entry on a locked journal, you cannot disable the feature anymore, nor edit any posted entry.
دانلود گزارش¶
برای دانلود گزارش تغییرناپذیری داده وارد مسیر شوید و دکمه دانلود گزارش بررسی تغییرناپذیری داده را کلیک کنید.
The report's first section is an overview of all your journals and their configuration. Under the inalterability check column, you can see whether or not a journal's posted entries are locked with a hash (V) or not (X). The coverage column tells you when a journal's posted entries started being locked.
The second section gives you the result of the data consistency check for each hashed journal. You can view the first hashed entry and its corresponding hash and the last hashed entry and its corresponding hash.
