Glossary

Standardized terminology used across the TronSave docs.

Term	Definition
Energy	TRON resource consumed to execute smart contracts (e.g. USDT TRC‑20 transfers). Obtained by staking TRX or renting on TronSave.
Bandwidth	TRON resource consumed by transaction byte size. Every transaction needs some.
TRX	The native token of the TRON network.
SUN	The smallest unit of TRX. 1 TRX = 1,000,000 SUN. All prices are quoted in SUN.
Stake 2.0	TRON's staking (freeze) mechanism that produces Energy/Bandwidth. The basis of TronSave's supply.
Delegation	Granting Energy/Bandwidth from one account to another on‑chain. A filled order results in a delegation to the receiver.
Provider / Seller	A user who stakes TRX and rents out (delegates) the resulting Energy to earn APY.
Buyer	A user who rents Energy/Bandwidth from the marketplace.
Order book	The live set of buy/sell orders that determines the market price.
Internal Account	A TronSave‑managed balance you deposit TRX into; the API can spend from it automatically. Tied to an API Key.
API Key	A secret identifier linked to your Internal Account, used to authorize API requests.
Signed Transaction	An alternative auth method where you sign a TRX payment from your own wallet per purchase (full custody).
unitPrice	Price per resource unit in SUN, or a tier: SLOW / MEDIUM / FAST.
resourceType	ENERGY or BANDWIDTH. Defaults to ENERGY.
durationSec	Rental duration in seconds. Default 259200 (3 days).
receiver	The TRON address that receives the rented resource.
requester	The address placing/representing the order (the representAddress of your internal account).
fulfilledPercent	Order fill status: 0 pending, 1–99 partial, 100 complete.
APR / APY	Provider returns. See Pricing & APY for formulas.
WTRX	Wrapped TRX, used in some SDK payment flows.
ZapBuy	Buy Energy by sending TRX directly to a bot address; fixed 1‑hour rental.
Fast Charge	API flow for rapid Energy charging (estimate → create → track → confirm).
Nile	The TRON testnet TronSave uses (api-dev.tronsave.io).

Terminology standard: write Energy and Bandwidth capitalized when referring to the TRON resources; TRX and SUN in caps; field names in code.