# bgrosso.eth's ETH/USD Tracking Bear/Bull NFT

By [bgrosso.eth 🌐](https://paragraph.com/@bgrosso) · 2022-11-08

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**Who are you, and what is your software development background?**

Frontend engineer at Capital One, previously fullstack/graphql at startup, before that a teacher, before that investment manager. In Northeast US.

**Why did you want to complete this lesson?**

I wanted to complete this lesson because I want to complete the whole series but also because I have tried doing random number generation in the past in a smart contract and it was not easy and wanted to learn what Chainlink is all about.

**When did you complete the project?**

11/07/22

**What technologies did you use?** Remix, Chainlink Verified Random Function and Price Feed, wrote contract in Solidity with prebuilt OpenZeppelin contract functions, Goerli Ethereum testnet, IPFS, OpenSea.

**What did you enjoy about the tutorial?**

The difficulty - this was much harder than the first 4 in the series and I feel that made me grow more. There were several significant blockers along the way such as not being able to compile the contract because I was missing a directive, etc that caused me to learn quite a bit.

**How do you think you can use this technology to build useful applications in the future? What are some specific example applications?**

Anything that needs true randomness generated in a decentralized way, or tracking of markets in decentralized way could benefit. With inflation top of mind a cool idea would be a token that links increases in supply to USD inflation somehow. I found online that CryptOrchids using VRF to determine what ‘species’ of NFT a user gets.

**Who would you recommend this project to?**

Anyone!

**Wallet address**

0xC0e90583cc27191Ab17407Ac3595E1509ffDA69F

**Github Code:** [https://github.com/modelB/rtw3-chainbattles-w3](https://github.com/modelB/rtw3-chainbattles-w3)

**NFT:**

[https://testnets.opensea.io/assets/goerli/0x7c261631946485d8f85c9e93c0c75ef946bd8210/0](https://testnets.opensea.io/assets/goerli/0x7c261631946485d8f85c9e93c0c75ef946bd8210/0)

![](https://storage.googleapis.com/papyrus_images/5345c90b6d91c2f1e8e18c19ef3c4c45a5723ecf21dda90b90812341ad6e8a87.png)

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*Originally published on [bgrosso.eth 🌐](https://paragraph.com/@bgrosso/bgrosso-eth-s-eth-usd-tracking-bear-bull-nft)*