Documentation

The Reward Rate (displayed as fspRewardRate) represents the FTSO Scaling Provider reward rate derived from WNAT (Wrapped Native Asset Token) claims.

It reflects how effectively a data provider is earning rewards relative to the delegation it receives. A higher reward rate indicates stronger provider performance over the measured period.

Values greater than or equal to 1 are considered anomalous and are displayed as -- in the UI. Valid reward rates are shown to four decimal places.

The Reward Rate CV (coefficient of variation) measures the consistency of a provider's reward rate across epochs. A lower CV indicates more stable, predictable performance.

The Staking APR estimates the annualised return for delegators staking to a specific validator node. Each node is calculated independently. APRs are never averaged across the nodes of an entity, so node-level configuration (fees, uptime) is fully visible.

Per-epoch reward rate

For each reward epoch and validator node, two reward rates are computed and summed:

• normalRate: the node’s reward (after the validator fee is deducted) divided by its total stake at epoch end. A node with a 100% fee contributes 0 here.
• mirrorRate: the MIRROR claim pool for that node divided by the stake weight at the vote-power block (a separate snapshot). The denominator is intentionally different from normalRate’s, since MIRROR rewards are paid to a different stake basis.

If combinedRate is 0 or has no valid inputs for the epoch, the rate for that node/epoch is treated as missing and excluded from downstream smoothing.

Annualisation

To turn the per-epoch rate into the APR shown on the validator table:

1. Take the most recent up-to-4 epochs with a valid combined rate for the node (newest first).
2. Smooth with a simple moving average (SMA) over that window.
3. Annualise by multiplying the SMA by epochsPerYear, derived dynamically from the actual elapsed time between the last two reward epochs (≈ 104 for 3.5-day epochs; falls back to 104 when fewer than two epochs are available).

The single-epoch rate (latest), the smoothed rate (SMA), and the annualised value (SMA × epochsPerYear) are all persisted on each stake using only that stake’s own validator’s metrics.

Notes

• Closed or expired stakes (end time in the past) have all three APR fields cleared.
• Actual returns vary as reward amounts, fees, and delegation totals change each epoch.
• Nodes with a 100% delegation fee (or otherwise no rewards in any of the last 4 epochs) show “no data” rather than a literal 0% APR.

Data source: flare-foundation/reward-scripts

The FSP APR (FTSO Scaling Provider APR) represents the estimated annualised return for delegators based on FTSO reward distributions.

To filter out unreliable outliers, FSP APR values exceeding 15% are hidden from the UI and displayed as --.