Faktur

A simple tool to timestamp data and relay them to somewhere.

Smart contract component.

Donation:

BTC: 1MYiMU3GfsgEP4EYHHonG9Fy6DkA1JC3B5

ETH: 0xc8f8371BDd6FB64388F0D65F43A0040926Ee38be

Description

When new a new files on backend appears:

1. A pre-receipt is created
2. The file is sent to delivrery
3. The file to files queue

When time is due:

1. Anchor every files in queue
2. Publish new receipts
3. Send result with alert

Receipt

The pre-receipt emission open a challenge period based on the Smart Contract SLA(TODO). The client should check the validity of the receipt (Smart Contract funcion)

The pre-receipt can't be challenged for N period.

After N period, the pre-receipt if submitted on-chain can open a challenge for the oracle to prove that it timestamped the hash correctly.

To cancel the challenge the oracle submit the audit path on-chain, keeping the funds if provided.

After N+X period, the pre-receipt won't be challengeable anymore and is put to removal.

Verify by calling either VerifyRFC6962 or VerifyMerkleHash Smart Contract audit function.

Receipt producer

• Chainpoint2.1 based
• OpenTimestamps
• BlockReceipt
• Custom

Verification algorithm

• rfc6962 "Certificate transparency"
• Merkle Tree (Chainpoint 2.1, deprecated)

Backends

• POST HTTP
• Google Drive

Delivrery system

• Mail
• Sentry
• API (SMS, ...)