Prepare ERC721 contract and mint some tokens

Create a .secret file in this directory, with a twelve word phrase mnemonic of your Wallet, as deploying contracts comsumes gas. This will be used by truffle-config.js

Deploy the contract in test network:

truffle test test/deploy.js --network ropsten

Contract StarNFT will be deployed in ropsten network. It will generate a contractAddr.txt in this directory, with the contract address in it, which will be used by test/mint.js

Mint a token:

truffle test test/mint.js --network ropsten

TokenId is an incremential integer start from 0.

Launch the service

Start http server: go run main.go

In browser, open http://localhost:8080/<CONTRACT_ADDRESS>/<TOKENID>

example: http://localhost:8080/0x77b9F65b1d9805a5DaB29dF9e66F6D5441fC003e/2

This will return the owner of the given token ID and the contract address.