NFTOptionsExample.js

const { expect } = require("chai");

describe("NFTOptions", function () {
    const penguAddr = "0xBd3531dA5CF5857e7CfAA92426877b022e612cf8";
    const penguOwner = "0x2c2c2F6DBe08942280d4F7626b6BAd5C11D20215";
    const ids = ["2036", "4205"];
    const buyer = "0xe5ee2B9d5320f2D1492e16567F36b578372B3d9F";

    const erc721Abi = [
        "function approve(address to, uint256 tokenId)"
    ];
    const penguContract = new ethers.Contract(penguAddr, erc721Abi, ethers.provider);

    it("should create an option, sell it, and redeem it", async function () {
        const Options = await ethers.getContractFactory("NFTOptions");
        const options = await Options.deploy();
        await options.deployed();

        await setupImpersonator(penguOwner);
        await setupImpersonator(buyer);

        const penguOwnerSigner = await ethers.provider.getSigner(penguOwner);
        const buyerSigner = await ethers.provider.getSigner(buyer);

        let recent = await ethers.provider.getBlockNumber();
        let block = await ethers.provider.getBlock(recent);
        let time = block.timestamp + 3600 * 24;

        let strikePrice = ethers.utils.parseEther("0.1");
        let optionPrice = ethers.utils.parseEther("0.1");

        console.log("Approving");
        await penguContract.connect(penguOwnerSigner).approve(options.address, ids[0]);

        console.log("Creating offer");
        await options.connect(penguOwnerSigner).createOffer(
            penguOwner,
            buyer,
            penguAddr,
            ids[0],
            time,
            strikePrice,
            optionPrice
        );

        let offer = await options.getOffer(penguAddr, ids[0]);
        // console.log(offer);

        console.log("Accepting offer");
        await options.connect(buyerSigner).acceptOffer(
            penguAddr,
            ids[0],
            offer.nonce,
            {
                "value": offer.optionPrice
            }
        );

        let balanceSeller = await options.balances(penguOwner);
        expect(balanceSeller).to.gte(ethers.BigNumber.from(0));
        console.log(`Seller balance is ${balanceSeller}`);

        await timeTravel(3600 * 24);

        await options.connect(buyerSigner).claimOption(
            penguAddr,
            ids[0],
            {
                "value": offer.strikePrice
            }
        );

        balanceSeller = await options.balances(penguOwner);
        expect(balanceSeller).to.gte(ethers.BigNumber.from(0));
        console.log(`Seller balance is ${balanceSeller}`);
    });
});

async function setupImpersonator(addr) {
    const impersonateTx = await hre.network.provider.request({
        method: "hardhat_impersonateAccount",
        params: [addr],
    });
}

async function timeTravel(time) {
    await network.provider.send("evm_increaseTime", [time]);
    let transact = await network.provider.send("evm_mine");
    return transact;
}