generateMintSignature

import {
  mintWithSignature,
  generateMintSignature,
} from "thirdweb/extensions/erc1155";
 
const { payload, signature } = await generateMintSignature({
  account,
  contract,
  mintRequest: {
    to: "0x...",
    quantity: 10n,
    metadata: {
      name: "My NFT",
      description: "This is my NFT",
      image: "https://example.com/image.png",
    },
  },
});
 
const transaction = mintWithSignature({
  contract,
  payload,
  signature,
});
await sendTransaction({ transaction, account });