document_integrity

Document Integrity

Anchors the SHA-256 fingerprint of a file on Cardano so anyone with the file can verify it has not been tampered with. Uses the UVerify documentIntegrity template, which renders a drag-and-drop verifier on the verification page.

Prerequisites

• Python 3.9+
• uv

# macOS / Linux
curl -LsSf https://astral.sh/uv/install.sh | sh

Run

uv run main.py

On first run a new wallet is generated, funded from the UVerify testnet faucet, and the mnemonic is saved to wallet.txt. Subsequent runs restore the same wallet.

If sample_thesis.zip is not present in the working directory, a placeholder file is created automatically.

Keep wallet.txt private — it holds your private key phrase.

What it does

1. Creates or restores a wallet from wallet.txt.
2. Reads sample_thesis.zip (or creates a placeholder) and computes its SHA-256 hash.
3. Issues a certificate via client.issue_certificates() with metadata including file size, type, and a description for the verifier.
4. Waits for on-chain confirmation and prints a shareable verification URL.

Network

Targets the Cardano preprod testnet. Verification links open at https://app.preprod.uverify.io/verify/….