Resource codes

On TRON, you don't pay gas in the native coin the way you do on Ethereum. Instead you stake ("freeze") TRX to obtain network resources. The ResourceCode enum identifies which resource an operation concerns.

use tronz::primitives::ResourceCode;

Variant	Discriminant	Meaning
`ResourceCode::Bandwidth`	`0`	Network bandwidth (free daily allowance + staked)
`ResourceCode::Energy`	`1`	Consumed when executing smart contracts
`ResourceCode::TronPower`	`2`	Voting weight gained from staking

The discriminants match the protobuf ResourceCode enum, so values are used directly when building staking and delegation parameters.

use tronz::primitives::ResourceCode;
 
ResourceCode::Energy.as_i32();      // 1
ResourceCode::from_i32(1);          // Some(ResourceCode::Energy)
ResourceCode::from_i32(9);          // None — unknown discriminant

Default

ResourceCode::default() is Energy, since it is the most commonly staked-for resource and matches the default used by the staking builders:

assert_eq!(ResourceCode::default(), ResourceCode::Energy);

Usage

Resource codes appear throughout the staking API — when freezing, delegating, or querying limits:

use tronz::primitives::ResourceCode;
 
# async fn run(provider: impl tronz::TronProvider, me: tronz::Address) -> anyhow::Result<()> {
// How much can this account still delegate, for each resource?
let max_energy = provider.get_can_delegate_max(me, ResourceCode::Energy).await?;
let max_bw = provider.get_can_delegate_max(me, ResourceCode::Bandwidth).await?;
# Ok(()) }

See Staking (Stake 2.0) for the full freeze / delegate flow.

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