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Estimate TRON Bandwidth and Energy

TRON charges bandwidth for every transaction and energy for contract calls like USDT transfers. This guide estimates both by simulating the transaction, so you provision the right energy and avoid a shortfall mid-send. Size energy before payouts and sweeps.

开始之前

The TRON transaction you intend to send, built as raw bytes.
An API key with C2 access for build and simulate.

1Build the TRON transaction

Build the transfer to get the raw payload. A native TRX transfer mainly consumes bandwidth; a TRC-20 transfer also consumes energy.

curl -X POST https://api.1st-node.com/v1/tx/tron/build \
  -H "Authorization: Bearer sk_live_..." \
  -d '{"from":"TTreas...","to":"TR8h2...","amount":"5000000"}'
> {"raw":"0a02...","asset":"USDT"}

2Simulate to read the cost

Simulate the raw transaction; the result reports the bandwidth and energy the transfer will consume so you can size provisioning.

curl -X POST https://api.1st-node.com/v1/tx/tron/simulate \
  -H "Authorization: Bearer sk_live_..." \
  -d '{"raw":"0a02..."}'
> {"success":true,"energy_used":32000,"bandwidth_used":345}

3Provision energy to match

Rent or delegate at least the estimated energy to the sender so the transfer clears without burning TRX, then broadcast.

curl -X POST https://api.1st-node.com/v1/tron/energy/rent \
  -H "Authorization: Bearer sk_live_..." \
  -d '{"receiver":"TTreas...","amount":32000}'
> {"status":"active","energy":32000}

常见问题

What is the difference between bandwidth and energy?

Bandwidth covers the transaction's byte size; energy covers contract execution such as a TRC-20 transfer. Simulation reports both so you provision the right resource.

Why estimate before sending?

An energy shortfall makes a USDT transfer fall back to burning TRX or fail. Estimating lets you rent or delegate exactly enough energy first.

继续阅读

tron-api stablecoin-payment-api /pricing

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自助开通。支持加密货币或银行卡。按额度计费——重型原语更贵，简单调用很便宜。

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