ocean.js/README.md

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<h1 align="center">ocean.js</h1>

> JavaScript library to privately & securely publish, exchange, and consume data.

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With ocean.js, you can:

- **Publish** data services: downloadable files or compute-to-data. Create an ERC721 **data NFT** for each service, and ERC20 **datatoken** for access (1.0 datatokens to access).
- **Sell** datatokens for a fixed price. Sell data NFTs.
- **Transfer** data NFTs & datatokens to another owner, and **all other ERC721 & ERC20 actions** using [web3.js](https://web3js.readthedocs.io/en/v1.2.9/web3-eth-contract.html) etc.

ocean.js is part of the [Ocean Protocol](https://oceanprotocol.com) toolset.

This is in alpha state. If you run into problems, please open up a [new issue](https://github.com/oceanprotocol/ocean.js/issues/new?assignees=&labels=bug&template=bug_report.md&title=).

- [📚 Prerequisites](#-prerequisites)
- [🏗 Installation & Usage](#-installation--usage)
- [🦑 Development](#-development)
- [✨ Code Style](#-code-style)
- [👩‍🔬 Testing](#-testing)
  - [Unit Tests](#unit-tests)
  - [Integration Tests](#integration-tests)
- [🛳 Production](#-production)
- [⬆️ Releases](#️-releases)
  - [Production](#production)
  - [Pre-Releases](#pre-releases)
- [🏛 License](#-license)

## 📚 Prerequisites

- node.js ([Install from here](https://nodejs.org/en/download/))
- Docker ([Managed as a non-root user](https://docs.docker.com/engine/install/linux-postinstall/))
- A Unix based operating system (Mac or Linux)

## 🏗 Installation & Usage

```bash
npm install @oceanprotocol/lib
```

- Checkout our [code examples](CodeExamples.md) or [compute to data examples](C2DExamples.md) to see how you can use ocean.js.
- Refer to the [Ocean Protocol documentation](https://docs.oceanprotocol.com/) for more guides and tutorials.
- Visit the [Ocean Protocol website](https://docs.oceanprotocol.com/) for general information about Ocean Protocol.
- If you have any difficulties or if you have further questions about how to use ocean.js please reach out to us on [Discord](https://discord.gg/TnXjkR5).
- If you notice any bugs or issues with ocean.js please [open an issue on github](https://github.com/oceanprotocol/ocean.js/issues/new?assignees=&labels=bug&template=bug_report.md&title=).

## 🦑 Development

The project is authored with TypeScript and compiled with `tsc`.

To start compiler in watch mode:

```bash
npm install
npm start
```

## ✨ Code Style

For linting and auto-formatting you can use from the root of the project:

```bash
# lint all js with eslint
npm run lint

# auto format all js & css with prettier, taking all configs into account
npm run format
```

## 👩‍🔬 Testing

Test suite for unit & integration tests is setup with [Mocha](https://mochajs.org) as test runner, and [nyc](https://github.com/istanbuljs/nyc) for coverage reporting. A combined coverage report is sent to CodeClimate via the `coverage` GitHub Actions job.

Running all tests requires running Ocean Protocol components beforehand with [Barge](https://github.com/oceanprotocol/barge), which also runs a `ganache-cli` instance:

```bash
git clone https://github.com/oceanprotocol/barge
cd barge

./start_ocean.sh --with-provider2 --no-dashboard --with-c2d
```

You can then proceed to run in another terminal.

Let ocean.js know where to pickup the smart contract addresses, which has been written out by Barge in this location:

```
export ADDRESS_FILE="${HOME}/.ocean/ocean-contracts/artifacts/address.json"
```

Build metadata:

```
npm run build:metadata
```

Executing linting, type checking, unit, and integration tests with coverage reporting all in one go:

```bash
npm test
```

### Unit Tests

You can execute the unit tests individually with:

```bash
npm run test:unit
# same thing, but with coverage reporting
npm run test:unit:cover
```

### Integration Tests

You can execute the integration tests individually with:

```bash
npm run test:integration
# same thing, but with coverage reporting
npm run test:integration:cover
```

> Note: On macOS, changes to the `provider`, `metadataCache` and `subgraph` URLs are required, as their default `barge` IPs can not be accessed due to network constraints on macOS. Instead use `http://127.0.0.1` for each direct call to the mentioned services, but keep the internal `provider` URL (`http://172.15.0.4:8030`) hardcoded inside all DDO's `serviceEndpoint`, and when calling `nft.setMetadata()`.

## 🛳 Production

To create a production build, run from the root of the project:

```bash
npm run build
```

## ⬆️ Releases

Releases are managed semi-automatically. They are always manually triggered from a developer's machine with release scripts.

### Production

From a clean `main` branch you can run the release task bumping the version accordingly based on semantic versioning:

```bash
npm run release
```

The task does the following:

- bumps the project version in `package.json`, `package-lock.json`
- auto-generates and updates the CHANGELOG.md file from commit messages
- creates a Git tag
- commits and pushes everything
- creates a GitHub release with commit messages as description
- Git tag push will trigger a GitHub Action workflow to do a npm release

For the GitHub releases steps a GitHub personal access token, exported as `GITHUB_TOKEN` is required. [Setup](https://github.com/release-it/release-it#github-releases)

### Pre-Releases

For pre-releases, this is required for the first one like `v0.18.0-next.0`:

```bash
./node_modules/.bin/release-it major|minor|patch --preRelease=next
```

Further releases afterwards can be done with `npm run release` again and selecting the appropriate next version, in this case `v0.18.0-next.1` and so on.

## 🏛 License

```
Copyright ((C)) 2023 Ocean Protocol Foundation

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

   http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
```