be-onboarding

HOMEWORK 1 - Simple NFT API

The task is to develop a simple NFT API that returns all NFTs owned by an address on the Optimism network.

For example if the user inputs 0x35daf2acb874b377ff49cc2aac45dff3a0a9f753 we want to return the following output:

[
  {name:"Optimistic Goosey (Goseman)", amount: 1},
  {name:"Optimistic Plebe Pill", amount: 1}
]

You can see which NFTs the user has on Optimism by going to this website in order to verify the solution.

Below are some important limitations of the scope of this assignment that will make it way easier.

You know that the user only has NFTs that are compliant with the ERC1155 standard.
You know that the user received/minted all their NFTs between the 15th and 25th of October 2023.

Optimism RPC Node - you can use any provider you like
Database of your choosing if you need one
Programming language/framework of your choosing
Obviously using any third-party web3/blockhain/crypto APIs (except for an RPC node with standard RPC procedures) is not allowed

Install Metamask, get some assets into your Metamask and buy some NFTs on OpenSea. Get some NFTs on Polygon, Optimism and Base networks.
Use your code from HOMEWORK 1 to build an API where you can input your own address and get an array with all your NFTs across all chains. Example output below.

[
  {name:"Optimistic Goosey (Goseman)", amount: 1, chain: "Optimism"},
  {name:"Optimistic Plebe Pill", amount: 1, chain: "Polygon"}
]