Seeker Genesis Token

npm install @solana/kit @solana-program/token-2022

import { createSolanaRpc, unwrapOption } from "@solana/kit";
import { fetchAllMaybeMint } from "@solana-program/token-2022";

async function checkWalletForSGT(walletAddress) {
  const HELIUS_RPC_URL = `https://mainnet.helius-rpc.com/?api-key=${HELIUS_API_KEY}`;

  // The metadata mint and group mint address are intentionally the same.
  const SGT_METADATA_ADDRESS = "GT22s89nU4iWFkNXj1Bw6uYhJJWDRPpShHt4Bk8f99Te";
  const SGT_GROUP_MINT_ADDRESS = "GT22s89nU4iWFkNXj1Bw6uYhJJWDRPpShHt4Bk8f99Te";

  try {
    const rpc = createSolanaRpc(HELIUS_RPC_URL);

    // getTokenAccountsByOwnerV2 is a Helius extension rather than a standard
    // RPC method, so call it over plain JSON-RPC with pagination.
    const allTokenAccounts = [];
    let paginationKey = undefined;
    let pageCount = 0;

    console.log(`Starting paginated fetch for wallet: ${walletAddress}`);

    do {
      pageCount++;
      console.log(`Fetching page ${pageCount}...`);

      const requestPayload = {
        jsonrpc: "2.0",
        id: `page-${pageCount}`,
        method: "getTokenAccountsByOwnerV2",
        params: [
          walletAddress,
          { programId: "TokenzQdBNbLqP5VEhdkAS6EPFLC1PHnBqCXEpPxuEb" }, // Token-2022 program
          {
            encoding: "jsonParsed",
            limit: 1000, // Maximum accounts per request
            ...(paginationKey && { paginationKey }),
          },
        ],
      };

      const response = await fetch(HELIUS_RPC_URL, {
        method: "POST",
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify(requestPayload),
      });

      if (!response.ok) {
        throw new Error(`HTTP error! status: ${response.status}`);
      }

      const data = await response.json();

      if (data.error) {
        throw new Error(`RPC error: ${data.error.message}`);
      }

      // getTokenAccountsByOwnerV2 shapes its result differently depending on
      // withContext: without it, the accounts are the array at result.value and
      // the key is at result.paginationKey; with it, both sit under result.value.
      const page = Array.isArray(data.result?.value)
        ? {
            accounts: data.result.value,
            paginationKey: data.result.paginationKey,
          }
        : (data.result?.value ?? {});

      const pageResults = page.accounts ?? [];
      console.log(
        `Page ${pageCount}: Found ${pageResults.length} token accounts`,
      );

      allTokenAccounts.push(...pageResults);
      paginationKey = page.paginationKey;
    } while (paginationKey); // Continue until no more pages

    console.log(
      `\nCompleted pagination: ${pageCount} pages, ${allTokenAccounts.length} total token accounts`,
    );

    // Extract mint addresses from token accounts.
    // Skip token accounts with a zero balance: transferring an SGT out of a
    // wallet leaves the old token account open at a balance of 0, and it
    // must not count as current ownership.
    const mintAddresses = allTokenAccounts
      .map((accountInfo) => accountInfo?.account?.data?.parsed?.info)
      .filter((info) => info?.mint && info.tokenAmount?.amount !== "0")
      .map((info) => info.mint);

    console.log(`Extracted ${mintAddresses.length} mint addresses`);

    // Fetch and decode mint accounts in batches of 100 to avoid RPC limits
    const BATCH_SIZE = 100;

    for (let i = 0; i < mintAddresses.length; i += BATCH_SIZE) {
      const batch = mintAddresses.slice(i, i + BATCH_SIZE);
      console.log(
        `Fetching mint info batch ${Math.floor(i / BATCH_SIZE) + 1}/${Math.ceil(mintAddresses.length / BATCH_SIZE)}`,
      );

      const mints = await fetchAllMaybeMint(rpc, batch);

      for (const mint of mints) {
        // Skip addresses that have no account data on chain
        if (!mint.exists) continue;

        const extensions = unwrapOption(mint.data.extensions) ?? [];

        // Check for correct SGT Metadata
        const metadataPointer = extensions.find(
          (ext) => ext.__kind === "MetadataPointer",
        );
        const hasCorrectMetadata =
          metadataPointer !== undefined &&
          unwrapOption(metadataPointer.metadataAddress) ===
            SGT_METADATA_ADDRESS;

        // Check for correct SGT Group Member
        const groupMember = extensions.find(
          (ext) => ext.__kind === "TokenGroupMember",
        );
        const hasCorrectGroupMember =
          groupMember !== undefined &&
          groupMember.group === SGT_GROUP_MINT_ADDRESS;

        // If both extensions match then it is an SGT
        if (hasCorrectMetadata && hasCorrectGroupMember) {
          console.log(
            `\nVERIFIED SGT FOUND: Wallet holds a verified SGT (${mint.address}).`,
          );
          return mint.address;
        }
      }
    }

    // No verified SGT found in wallet
    console.log("\nNo verified SGT found in wallet.");
    return null;
  } catch (error) {
    console.error("Error verifying SGT ownership:", error.message);
    return null;
  }
}