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Copy file name to clipboardExpand all lines: fern/tutorials/learning-solidity/how-to-interact-with-erc-721-tokens-in-solidity.mdx
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Interoperability helps NFT collections provide continuing utility to their holders, allows other projects to entice top buyers with discounts and exclusive access, and in some cases allows creators to do damage control for security breaches in the original contract.
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In a [previous tutorial](/docs/how-to-create-allowlists-based-on-nft-ownership), we learned how to interact with existing ERC-721 tokens to create custom allowlists. In this tutorial, we will explore a more advanced case. We will write a smart contract using Solidity and Hardhat that allows users who have paid and minted NFTs from a compromised contract to mint the same token IDs from a new contract for free.
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In this tutorial, we will explore a more advanced case. We will write a smart contract using Solidity and Hardhat that allows users who have paid and minted NFTs from a compromised contract to mint the same token IDs from a new contract for free.
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