OnlyDanks
Private end-to-end encrypted messenger built on blobs, fully anonymous and censorship-resistant.
Demo
About
What Is It? OnlyDanks is a messaging system that lives entirely on the Ethereum blockchain. There are no apps, no servers, and no middlemen. Messages are written directly to Ethereum’s new blob storage, making them: - Invisible to third parties (no one can read them) - Unlinkable (no one can tell who’s talking to whom) - Censorship-resistant (no one can delete or block them) It works like a fully private postbox, where only the intended recipient has the key—and no one even knows the box exists. How It Works (Conceptually) - You create a public identity using an Ethereum Name like yourname.onlydanks.eth - This name links to a public key, like sharing your digital mailbox - When someone wants to message you: - They use your public key to encrypt a message - They publish it into Ethereum’s blob space - You periodically check for new messages by scanning the blockchain - If a message is meant for you, you can decrypt and read it Why It's Special - Privacy by design: No servers or apps know who you are - Stealthy delivery: Only you can find and read your messages - Globally accessible: Anyone with an Ethereum wallet can use it - No central control: Can't be taken down, blocked, or censored - No history or tracking: All data is ephemeral and unlinkable
How it's made
Identity & Registration - Users register ENS subnames (e.g., user.onlydanks.eth) through an L2 registrar on World-Seoplia - Each subname links to a secp256k1 public key via ENS text record - ENS’s L1 resolver points to our L2 registry Message Sending Flow 1. Look up ENS subname → get public key 2. Generate ephemeral private key 3. Use ECDH (Diffie-Hellman) to create shared secret 4. Sign the message with sender's private key 5. Encrypt the signed message with the shared secret 6. Publish to blob: - Ephemeral public key - Initialization vector (IV) - hash(shared_secret) (used for message lookup) - Encrypted message Backend Service - Stateless, self-hostable - Indexes blobs and provides: - List of ephemeral public keys + IV - Messages by hash(shared_secret) - Does not store any private info or user data Message Receiving Flow - The recipient downloads ephemeral public keys + IVs from the backend - Tries to compute shared secrets from each - For each derived hash(shared_secret), queries backend for matching blobs - If found, decrypts the message and verifies the sender via signature