How to Mint zkSBT on Manta Pacific

1. install zksbt JS SDK

       npm install @zksbt/jssdk

2. initialize zksbt JS SDK

   import { ZKSbtSDK } from "@zksbt/jssdk";
   
   const ZKSBT_CONTRACT = "0xa44155ffbcE68C9C848f8Ea6F28C40311085125E";
   const provider = new ethers.providers.JsonRpcProvider(MANTA_RPC);
   const wallet = new ethers.Wallet(PRIVATE_KEY, provider);
   const sdk = await ZKSbtSDK.create(wallet, ZKSBT_CONTRACT);

3. Ask for certification

   const CATEGORY = 109n; // MANTA PACIFIC ASSET CERTIFICATE
   const ATTRIBUTE = "1";
   const URL =
       "https://npo-cdn.asmatch.xyz/MantaPacific/ETH/ETH_moreThan1.jpg";
   const claim_signature = await sdk.claimSbtSignature(CATEGORY, ATTRIBUTE);
   const request = {
       sig: claim_signature,
       publicAddress: sdk.identity.getCommitment().toString(),
       category: CATEGORY.toString(),
       attribute: ATTRIBUTE,
       url: URL,
       email: "",
   };
   const API = "https://prod.asmatch-api-npo.asmatch.xyz/pomp/premint";
   await axios.post(API, request);

4. check certificate data

   Response data: {
   code: 0,
   message: 'success',
   data: {
   asset_id: '91856531439484927',
   attribute: '1',
   eth_address: '0x9cda03ce3a07c7494a34a9ba53cd75dd8e00c5b9',
   sig_address: '0xa7d2C348D30AD1cF527AFF6c9C56110F91BDa649',
   signature: '0x2a11462a728882e6b1f834931104d92db9aaeb6741e9668842ba6a9aac38faa613bba08265fdeb4c16af98ea96f953b135d5aa3218cbc6b0a4357550be22df1a1b',
   sbt_url: 'https://npo-cdn.asmatch.xyz/MantaPacific/ETH/ETH_moreThan1.jpg',
   verifyTimestamp: '1698631406716',
   certificate_msg: 'Sign this meesage to claim zkSBT : public address 2120648137430114184213068244856561888015650291389717374042288473592882019645 sbt category 109 sbt attribute 1 sbt id 91856531439484927 verify timestamp 1698631406716'
   }
   }

5. send on-chain mint transaction

   const res = await sdk.mint(
       CATEGORY,
       ATTRIBUTE,
       response.data.data.asset_id,
       BigInt(response.data.data.verifyTimestamp),
       response.data.data.signature
   );

6. check transaction status

   if (res.status != 1) {
       throw new Error("pomp mint fail , res ", res);
   }