Chainlink on Ethereum

End-to-End MongoDB GraphQL Database, Chainlink External Adapter, and Oracle Contract on Ethereum

In this article, I will cover how my team set up dog walking data on MongoDB Atlas, exposed a GraphQL authenticated endpoint with Realm, and created a Chainlink External Adapter to get that data onto Ethereum Smart Contracts.

Andrew Hong
Feb 8 · 6 min read
Photo by Feifei Peng on Unsplash
Data Flow of FidoByte

Here are the three steps we will cover

MongoDB Atlas and Realm: A Fully Managed GraphQL API Solution

const app = new Realm.App("petproject-sfwui");await app.logIn(Realm.Credentials.emailPassword("test@gmail.com", "test123"));

Creating your Chainlink External Adapter and accompanying Job Specification

Creating your Oracle Contract to make your query and decoding the return data

In Conclusion

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Andrew Hong

Written by

Humanizing Data Through Stories https://www.linkedin.com/in/andrew-hong-nyc/

Coinmonks

Coinmonks

Coinmonks is a non-profit Crypto educational publication. Follow us on Twitter @coinmonks Our other project — https://coincodecap.com

Andrew Hong

Written by

Humanizing Data Through Stories https://www.linkedin.com/in/andrew-hong-nyc/

Coinmonks

Coinmonks

Coinmonks is a non-profit Crypto educational publication. Follow us on Twitter @coinmonks Our other project — https://coincodecap.com

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