I saw this project when I was casually looking at Twitter today.

The name of the project is vow.

This is his contract address:0x2d76705e0ab39dcbb4e178bffaf866847c199b90

The approximate process is that you use your address to add your wife's address to his contract, and then use your wife's address to add your address to the contract.（gas fee=$150*2）

So u got married in the blockchain.

Finally, an nft with the address of you and your wife is generated.

The amazing thing is that someone sells this nft in oopensea. https://opensea.io/collection/vows

Do you sell your marriage?

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Do you think this kind of nft is an innovation or a fraudulent project？