How can I create inscription psbt with this library?

[devlancer412]

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I'm going to build a NFT project with this library. There would be two signer - one is user and one is backend privatekey. And backend builds psbt and user pays fee for that, ofc owner of ordinal after create is user. and ordinal should be include some metadata and parent inscription.

maybe inputs of this psbt would be utxos of user and outputs are inscription and platform fee.

Please help me. Short example code would be very helpful