# AT Protocol Notary (atnotary)

Create permanent, verifiable attestations of [AT Protocol](https://atproto.com/) records using [Ethereum Attestation Service](https://attest.org/) (EAS).

## Why

- **Standardized attestations** - interoperable format used across ecosystem
- **On-chain verification** - stored on Ethereum/Base, immutable and public
- **Composable** - other projects can reference and build on attestations
- **Infrastructure** - explorers, indexers, and tooling already exist
- **Multi-chain** - works on Ethereum, Base, Optimism, Arbitrum

## What Gets Attested

- `recordURI` - Full AT Protocol URI
- `cid` - AT Protocol's content identifier
- `contentHash` - DAG-CBOR hash
- `pds` - Personal Data Server URL
- `timestamp` - When attested

## Install

```bash
npm install -g atnotary
```

## Setup

1. **Create config file:**

```bash
atnotary config
```

2. **Edit `.atnotary.yaml`:**

```yaml
privateKey: "0x..."       # private key for writing
network: base-sepolia     # default network
```

3. **Get testnet ETH:**
   - Sepolia: https://sepoliafaucet.com/
   - Base Sepolia: https://bridge.base.org/

**That's it!** Default schemas are provided for all networks.

### Custom Schema (Optional)

If you want to deploy your own schema:

```bash
atnotary init --network sepolia
```

Then add the `schemaUID` to your `.atnotary.yaml` file.

## Usage

```bash
# notarize
atnotary notarize "at://did:plc:xxx/app.bsky.feed.post/abc"

# verify
atnotary verify "0xabc..." --network sepolia

# compare with current state
atnotary verify "0xabc..." --compare
```

## Library Usage

```typescript
import { ATProtocolNotary } from 'atnotary';

const notary = new ATProtocolNotary({
  privateKey: "0x...", // optional, just for writing
}, 'sepolia');

const result = await notary.notarizeRecord('at://...');
const attestation = await notary.verifyAttestation('0x...');
const comparison = await notary.compareWithCurrent(attestation);
```

## Networks

- Ethereum Sepolia (testnet)
- Base Sepolia (testnet)
- Base (mainnet)

## Use Cases

- Political accountability
- Journalism evidence
- Open source governance
- Content authorship proof
- Legal documentation

## License

MIT