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What it is

The Energy Broadcaster is a TRON node URL that you set once in your wallet (TronLink, TokenPocket) or in your own backend. When a signed transaction goes through it, the broadcaster works out the energy and bandwidth the sender needs, delegates them to the sender and only then broadcasts the transaction. The cost is charged to your TronRental balance, so the sender’s address needs no TRX for energy or bandwidth. Your keys stay with you: the broadcaster receives an already signed transaction and broadcasts it unchanged.

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Setup

  1. Top up your TRX balance on tronrental.com.
  2. Create a broadcaster on the Broadcast page of the dashboard. You get a secret broadcast URL — one per wallet, so the statistics do not mix.
  3. Set the URL as the node in your wallet’s network settings, or use it from your server over HTTP or gRPC (the dashboard shows the gRPC server, port and TLS settings).
The broadcast URL works like a password: anyone who has it spends your balance. If it leaks, switch the broadcaster off in the dashboard and create a new one.

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What is covered

For a swap or a contract call the broadcaster simulates the signed transaction on its own node and delegates the energy the sender pays for, with a margin. When the contract’s deployer covers part of the energy, only the sender’s part is delegated.

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Limits

Swaps and contract calls are served within the limits of your account: at most 1,000,000 energy per call, and a daily energy limit for transfers of other tokens and calls to other contracts, shared by all your broadcasters (UTC day). A call above a limit is broadcast as is — without delegation and without a charge. Contact support if you need different limits.

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What is not covered

  • Fees charged in TRX. The TRON network charges some fees in TRX rather than in energy or bandwidth: activating a new address when sending it TRX or TRC-10 tokens (about 1.1 TRX), multi-signature transactions (+1 TRX), a memo (+1 TRX) and changing account permissions (100 TRX). Delegation cannot pay them, so the sender’s address needs its own TRX for such transactions.
  • Deploying smart contracts.
  • Other transactions without a smart contract (TRC-10 transfers, staking, voting) — they pass through the node unchanged.
  • Energy already on the sender’s address is not taken into account: the broadcaster always delegates the full amount the transaction needs.

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Broadcaster settings

All settings are on the Broadcast page, separately for each broadcaster. Transfers, swaps and contract calls that go through the broadcaster appear in the dashboard with their result: energy delegated and charged, or the reason it went out without energy.