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# Harmony JavaScript SDK
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[](https://www.npmjs.com/package/@harmony-js/core)
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[](https://travis-ci.com/FireStack-Lab/Harmony-sdk-core)
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This is the Harmony Javascript SDK which provides an easier way to interact with Harmony blockchain.
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Please read the [documentation](https://jssdk.doc.hmny.io/) for full API doc.
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The SDK includes following packages with package-level documentation and examples inside each package.
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1. [@harmony-js/core](https://github.com/harmony-one/sdk/tree/master/packages/harmony-core)
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2. [@harmony-js/account](https://github.com/harmony-one/sdk/tree/master/packages/harmony-account)
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3. [@harmony-js/crypto](https://github.com/harmony-one/sdk/tree/master/packages/harmony-crypto)
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4. [@harmony-js/network](https://github.com/harmony-one/sdk/tree/master/packages/harmony-network)
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5. [@harmony-js/utils](https://github.com/harmony-one/sdk/tree/master/packages/harmony-utils)
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6. [@harmony-js/transaction](https://github.com/harmony-one/sdk/tree/master/packages/harmony-transaction)
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7. [@harmony-js/contract](https://github.com/harmony-one/sdk/tree/master/packages/harmony-contract)
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8. [@harmony-js/staking](https://github.com/harmony-one/sdk/tree/master/packages/harmony-staking)
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# Examples
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* [A Token Faucet Demo DApp](https://github.com/harmony-one/token-faucet-demo-dapp)
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* [Hackathon DApps](https://docs.harmony.one/home/showcases/applications): DApps built during our internal hackathon
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* [soccerplayers](https://github.com/gupadhyaya/soccerplayers), [onemoji](https://github.com/peekpi/onemoji), [harmonauts](https://github.com/ivorytowerdds/harmonauts), [good-one](https://github.com/harmony-one/dapp-demo-crowdfunding)
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* [Cross-chain Apps](https://docs.harmony.one/home/showcases/crosschain) [the link contains code, demo, and more information]
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* [DeFi Apps](https://docs.harmony.one/home/showcases/defi)
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* [DevPost Hackathon Apps](https://docs.harmony.one/home/showcases/hackathons)
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* Eth<>Harmony Bridge Components: [frontend](https://github.com/harmony-one/ethhmy-bridge.frontend), [backend](https://github.com/harmony-one/ethhmy-bridge.appengine), [smart contracts](https://github.com/harmony-one/ethhmy-bridge), [test scripts](https://github.com/harmony-one/ethhmy-bridge.tests)
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* Eth<>Harmony bridge SDKs: [main sdk](https://github.com/harmony-one/ethhmy-bridge.sdk), [bridge UI widget](https://github.com/harmony-one/ethhmy-bridge.ui-sdk)
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* Swoop Dex: [interface](https://github.com/harmony-one/swoop-interface), [cli](https://github.com/harmony-one/swoop-cli), [sdk](https://github.com/harmony-one/swoop-sdk), [deployment](https://github.com/harmony-one/swoop-deployment), [misc](https://github.com/harmony-one/swoop-misc), [lib](https://github.com/harmony-one/swoop-lib), [periphery](https://github.com/harmony-one/swoop-periphery), [core](https://github.com/harmony-one/swoop-core), [testing](https://github.com/harmony-one/swoop-testing), [utils](https://github.com/harmony-one/swoop-utils)
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* [Iris Bridge](https://github.com/harmony-one/ethhmy-bridge-v2): inspired from near's rainbow bridge
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* [Animoca's BeastQuest Game](https://github.com/harmony-one/BeastQuest)
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* [Chainlink Testnet Integration Demo](https://github.com/harmony-one/chainlink-demo-project)
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* [NFT Store DApp](https://github.com/harmony-one/nft-store)
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* [old dapp-examples](https://github.com/harmony-one/dapp-examples): some of them may be outdated!
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# Installation
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This library works on both nodejs and browser. Please use it according to your use case.
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## Enviorment requirement
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* Nodejs: 10.0+
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* Browser: Latest Chrome and Firefox
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## Install from npm/yarn
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**Note: we added a @next tag to npm package, please use the following command to install with npm/yarn**
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```bash
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# npm
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npm install @harmony-js/core@next
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# yarn
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yarn add @harmony-js/core@next
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# tslib is required, we'd better install it as well
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npm install tslib
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yarn add tslib
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```
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# Building from source files
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## Install `lerna` and `typescript` globally
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```bash
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yarn global add lerna && yarn global add typescript
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```
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## Bootstrap and build
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```bash
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yarn bootstrap
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```
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## Bundle
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Build `umd` and `esm` version javascript for each sub-packages, which can be accessed by `import` or `require`
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```bash
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yarn dist
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```
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All files are exported in `packages/dist` folder, use `**.esm.js` or `**.umd.js` format
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# Running Tests
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## Unit tests
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```bash
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yarn test:src
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```
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## e2e tests
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1. Remove the `'cross-fetch': 'jest-fetch-mock'` line from `scripts/jest/jest.e2e.config.js`
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1. Run harmony node locally, follow the instructions: https://github.com/harmony-one/harmony
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1. Wait for 1-2 mins, and run this:
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```bash
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yarn build && yarn test:e2e
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```
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