# Hush Delayed Proof Of Work

The software which performs the actual action of injecting data into blockchains is called *Dragon*.

It's not a silent *Dragon*, it's quite talkative and likes to talk about blockhash data across
chains. You could say it spits DPoW fire cross-chain.

Dragon is an evolved form of a previous software called iguana. Dragons are bigger and better
than iguanas, as everybody knows.

## Differences from Iguana

Dragon inherits some features from Komodo [Iguana](https://github.com/komodoplatform/dpow), specificallly those needed to make notarizations, and the
dependencies of those algorithms. Large amounts of non-notarization code was deleted in the making
of dragon, drastically reducing the attack surface, increasing maintainability and reducing RAM/CPU
at compile-time and run-time. Some things that were deleted

  * Old version of libjpeg (8.4) that has CVE's: https://nvd.nist.gov/vuln/detail/CVE-2020-14153
  * JUMBLR, a failed mixer project
  * Market-making bots
  * APIs to talk with various exchanges that either don't exist or are being investigated
  * InstantDEX, a failed precursor to BarterDEX/AtomicDEX
  * Datachain, experimental precursor to KV
  * Ramchain - not even sure but it got deleted

## Installing Dragon

### Build instructions for NN operations:

```
cd dragon
```

### Build dragon for notary operations

```
./m_notary_build
```

### Start main-net notarizations:

```
./m_notary_HUSH
```

### Start 3rd party notarizations:

```
./m_notary_3rdparty
```

### Running Production

Get those bath salts ready.

### To build and launch in one step

Run

```
./m_notary
```

## License

GNU Public License Version 3


## Copyright

See [AUTHORS](https://git.hush.is/hush/dragon/src/master/AUTHORS) for details.