If you wish to purchase an NFT on OS(OpenSea) using Polygon, you’ll first need to bridge ETH over to the Polygon network.
Thankfully, you can bridge your ETH right inside of OS!
To do this, pull up your connected wallet of choice, by clicking the wallet icon in the upper right corner of the OpenSea landing page.
Once your wallet pops up, look below your blue “Add Funds” button at your available ETH funds. Directly to the right of your balance, are three dots, called “More”. Click there and select “Bridge to Polygon” from the dropdown menu.
The following popup should appear.
Enter the amount of ETH (Ethereum) you would like to bridge and click “Convert Tokens” when you are ready.
Sign the transaction on your crypto wallet, and grab a cup of coffee while you wait for the funds to transfer – it could take just a few minutes.
After completing the conversion, you will see your newly converted ETH (Polygon) inside your wallet connected to OpenSea.
It should be noted that you will need to pay a gas fee in order to bridge the funds, but thankfully you will only need to do this once.
Your freshly converted ETH funds will remain on Polygon, unless you bridge them back. For this reason, it might be wise to move a larger sum of money over, to avoid having to bridge funds every time you wish to buy another NFT.
Step 2: Finding and buying an NFT on OpenSea with Polygon
Now that your funds are available, it’s time to hit the marketplace.
How to find Polygon NFTs
There are two easy ways to find Polygon NFTs.
When browsing for NFTs, bring your attention to the side panel that lists filtering options. Below the “Price” and “Collections” filter tabs, you will see an option called “Chains”. Click the “Chains” option and select “Polygon” from the dropdown.
Now your browser will only populate Polygon compatible NFTs.
If it is your first time purchasing a Polygon NFT, you will be asked to unlock Polygon trading on your wallet. You will only have to complete this process once.
To complete your signature you will need to switch your wallet network to Polygon.
Also, make sure to have some MATIC tokens in your wallet to cover the small gas fee.
Congrats on your new Crypto Unicorn 😉
Step 3: Using Polygon to sell NFTs on OpenSea
If you would like to sell your NFTs, the process is quite similar to how you’d buy an NFT using ETH. When listing your NFT you will just need to switch your wallet to the Polygon Network, in order to sign off on the transaction.
Also, please remember that if your NFT was previously bought on Polygon, it will need to also be SOLD on Polygon.
Make sure you have MATIC tokens in your wallet to cover the transaction fees (just like when you bought).
Polygon’s Growth on OpenSea
According to Dune Analytics, Polygon’s total users over time on OpenSea, have increased from about 2,000 users in July of 2021, (when the service first became available) to over 1.2 million users in April of 2022.
OpenSea users are realizing the massive value add that Polygon provides, and as mass adoption of NFTs spreads, Polygon’s scaling solutions will only become increasingly necessary for sustainability.
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