Review on Revain by Denis Kulibin

After writing a review and its moderation, the review receives the Published status.

Further, the ratings of the review, the pros and cons, the review text itself are added into one long character line. You can view it by clicking on the blockchain link that each review has.



we get to a page that contains the same information on all reviews and their updates.

Since there are many reviews, Revain has been accumulating several reviews for some time. And for each such review, Revain receives a personal hash of the review.





1 - personal hash of a particular review

2 - hash of the whole block from 36 reviews

3 - a hash (identifier) ​​that is recorded in the bitcoin blockchain, a hyperlink, by clicking on which we will get to the Blockchain.com website. For this review it is Review



4 Revain in the block writes the hash of the previous - the parent block - thus showing the continuity of the chain of such review blocks.

5 - indicate how many reviews and reviews updates are included in this block.

The hash is calculated using the SHA256 algorithm. There are many services on the Internet that calculate the hash for text strings.

For example

Online text in SHA256

So..

For review

Creative Pebble V3 Minimalistic 2 Review on Revain | Robiul Islam

we got this hash (number 1 in the picture above) of this particular review (available by clicking on hash 1). As you can see, they match.

10d1928c2eca00d67e59fa266dc23a6c3e9d89c17cb1affa8efc2f0ddfa1e59a



each of the 36 reviews was processed into such a hash and a chain was obtained from them, which can be seen if you click on the hash (in the picture at number 2).





This chain also includes the hash of the review, which we are checking.

For the entire chain, the hash is again calculated using the SHA256 algorithm. Actually, we see this hash in the picture at number 2 = Block hash. In our example, this

787d3788927056cc8b437c33a2291bc60251910100691ffc91d71850f9536e22

To write to the bitcoin blockchain - revain converts this code entry into a hexadecimal code HEX 37383764333738383932373035366363386234333763333361323239316263363032353139313031303036393166666339316437313835306639353336653232 .

Then this code was written to the blockchain chain





You can check this by inserting into any converter their HEX to STRING

for example this one Best Hex to String Converter Online to Convert Hex to Text (Hexadecimal to Text) 





Entering the number written in the HEX blockchain into the HEX field, we get our block hash.



787d3788927056cc8b437c33a2291bc60251910100691ffc91d71850f9536e22