Mint NFT

1. Requirements for Minting Yabumi NFT

When minting Yabumi NFT, the contract receives the following data from the frontend:

• JointedID

• Signature (r)

• Signature (s)

• Signature (v)

2. Creation of Signature Data

Using the following data, the contract generates signature data:

• JointedID

• Minting address (msg.sender)

3. Verification of Signature Address

Using the following data, the contract verifies the backend signature address:

• Signature data created in step 2

• Signature (r)

• Signature (s)

• Signature (v)

4. Address Error Handling

It returns an error if the following two data do not match:

• Backend signature address verified in step 3

• Minting address

5. Minting Error Handling

If NFT has minted from the JointedID, an error is returned.

6. Index Assignment

The contract assigns a special tokenID if steps 4 and 5's checks are successful.

7. Saving the Jointed ID

To avoid minting the same ID more than once, the JointedID is saved as a minted ID in a variable.

8. Linking with Token ID

The contract stores the JointedID and Token ID linkage information in a variable.

9. Saving the Minting Wallet Address

The contract stores the wallet address link to the Token ID in a variable, making it possible to retrieve the wallet address from the Yabumi NFT Token ID.

10. Minting Procedure

Using the allocated Token ID and the wallet address, the contract carries out the minting.

11.Minting Event Emission

Store the JointedID and TokenID and trigger the emit event