This was not another Web3 landing. It needed a clear path: connect a wallet, lock a document, verify the record. We delivered concept, UI/UX and the front-end.
What shipped: wallet connector, SHA-256 in the browser, a gas calculator, and a validator wired to a block explorer.
Modules
MetaMask, WalletConnect and Coinbase connectors. SHA-256 runs in the browser — the file never hits the server. A gas calculator prices the mint. A public validator checks the record against a block explorer.
How the client earns
A fee on certificate minting and notarial lock on EVM: Ethereum, Polygon, Arbitrum.
Languages
The interface is English and Russian.
The twist
Only the hash goes on-chain, not the PDF. The document stays with the owner; the proof lives on the network.