getTokenAccountsByDelegate 사용 방법

# Replace <DELEGATE_PUBKEY> and <TOKEN_MINT_PUBKEY> or <TOKEN_PROGRAM_ID>
# Example using programId (SPL Token Program)
curl -X POST -H "Content-Type: application/json" -d \
  '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "getTokenAccountsByDelegate",
    "params": [
      "<DELEGATE_PUBKEY>",
      { "programId": "TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA" },
      { "encoding": "jsonParsed" }
    ]
  }' \
  <YOUR_RPC_URL>

# Example using a specific mint
curl -X POST -H "Content-Type: application/json" -d \
  '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "getTokenAccountsByDelegate",
    "params": [
      "<DELEGATE_PUBKEY>",
      { "mint": "<TOKEN_MINT_PUBKEY>" },
      { "encoding": "jsonParsed", "commitment": "confirmed" }
    ]
  }' \
  <YOUR_RPC_URL>

const { Connection, PublicKey } = require('@solana/web3.js');

async function findDelegatedAccounts(delegateAddress, filter, encoding = 'jsonParsed') {
  // Replace with your RPC endpoint
  const connection = new Connection('https://mainnet.helius-rpc.com/?api-key=<api-key>');
  const delegatePubKey = new PublicKey(delegateAddress);

  try {
    let actualFilter;
    if (filter.mint) {
      actualFilter = { mint: new PublicKey(filter.mint) };
    } else if (filter.programId) {
      actualFilter = { programId: new PublicKey(filter.programId) };
    } else {
      console.error("Filter must contain either 'mint' or 'programId'");
      return;
    }

    const accounts = await connection.getTokenAccountsByDelegate(
      delegatePubKey,
      actualFilter,
      { encoding }
    );

    console.log(`Found ${accounts.value.length} token accounts delegated to ${delegateAddress}:`);
    accounts.value.forEach(accInfo => {
      console.log(`  Token Account: ${accInfo.pubkey.toBase58()}`);
      if (encoding === 'jsonParsed' && accInfo.account.data.parsed) {
        console.log(`    Mint: ${accInfo.account.data.parsed.info.mint}`);
        console.log(`    Owner: ${accInfo.account.data.parsed.info.owner}`);
        console.log(`    Delegated Amount: ${accInfo.account.data.parsed.info.delegatedAmount.uiAmountString}`);
      }
      // console.log(JSON.stringify(accInfo.account.data, null, 2)); // For full data
    });

  } catch (error) {
    console.error(`Error fetching token accounts by delegate for ${delegateAddress}:`, error);
  }
}

// Replace with an actual delegate public key
const exampleDelegate = '4Nd1mBQtrMJVYVfKf2PJy9NZUZdTAsp7D4xWLs4gDB4T'; 

// Example 1: Find all SPL Token program accounts delegated to `exampleDelegate`
findDelegatedAccounts(exampleDelegate, { programId: 'TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA' });

// Example 2: Find accounts for a specific mint (e.g., USDC) delegated to `exampleDelegate`
// const usdcMint = 'EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v';
// findDelegatedAccounts(exampleDelegate, { mint: usdcMint });