proof-of-existence

This application is made as a reference case on how to use the rivine api.
With this tool, its possible to register files on a rivine chain that will proof that a registerd file is made before a certain timestamp.

Application tasks:

Generate proof of existence for a given file

1. Give a file, can be a compression of different files.
2. Hash the file with ex. B2B
3. Ask a transaction builder node for a prepared transaction.
4. Add some fee to it (depending on how fast you want it to be added) and append the hash to that transaction.
5. Sign that transaction.
6. Send it to some transaction builder nodes.
7. In a transaction builder node this transaction should then be added to a block that can be the valid one.
8. Make sure to tell the customer to save the file in the format used as an input! This can be done by making the file publicly available if this is the purpose or be saved securly in a hidden place. Losing the original document will fail to proof existence in futere!

Check if given file is included

1. Give a file
2. Hash the file the same way
3. Check if there exist a transaction with the calculated hash as extra info.
4. If not found, the file is not in this blockchain (yet)
5. If the hash is found, the blockdepth is calculated (the difference between the current blocktheight of the blockchain and the blockheight of the block of the found transaction) to give the "robustness"

from rivine.

Will this be added as a tutorial, such that anyone could easily fire up a daemon and a client, to play around with Rivine? Perhaps we'll have more pragmatic tutorials in the future, but this would be a great start, as we have nothing of its kind for now.

from rivine.