const API = 'https://api.tronnrg.com'; const ADDR = 'TFqUiCu1JwLHHnBNeaaVKH7Csm4aA3YhZx'; const delegateTo = 'TRecipientWallet'; // Step 1: Send TRX to the payment address // Pricing is linear: 16,250 energy per TRX. Minimum 4 TRX (65,000 energy), // maximum 1,000 TRX. Send 4 TRX for a standard transfer, 8 TRX if the // recipient has never received USDT (needs 130,000 energy), or any amount // in between — you get exactly trx × 16,250 energy back. const trxAmount = 4; // 4 → 65k, 8 → 130k, 16 → 260k, 40 → 650k ... const payment = await tronWeb.trx.sendTransaction(ADDR, trxAmount * 1e6); // Step 2: Sign — proves you sent the payment const message = `${payment.txid}:${delegateTo}`; const signature = await tronWeb.trx.signMessageV2(message); // Step 3: Claim the delegation const result = await fetch(`${API}/delegate`, { method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify({ tx_hash: payment.txid, delegate_to: delegateTo, signature, }), }).then(res => res.json()); // Done. Energy arrives in ~3 seconds. console.log(result.status); // "delegated" console.log(result.energy); // 65000 console.log(result.delegations[0].tx); // on-chain tx hash (verify on TronScan) console.log(result.ref); // "nrg_d_42" (for support)