⭐Starknet SRB

Learn how Starknet staking rewards are calculated. STRKSRB formula covers max inflation percentage, staking participation ratio, and total STRK supply.

STRKSRB is a benchmark representing the mean, annualized staking rate across all active Starknet validators.

STRKSRB is calculated and published by Staking Rewards via the Starknet Profile and Data API.

TL;DR: Starknet staking rewards follow a formula where the rate equals 10 times the max inflation percentage divided by the square root of the staking ratio (staked tokens / total supply). The rate decreases as more tokens are staked.

STRK Staking Rewards Rate: STRKSRB

STRKSRB = (10*mip) / \sqrt{(st/ts)}

Formula key

Metric name

Description

mip

Max Inflation Percentage

The maximum theoretical inflation percentage.

Staked Tokens

The total tokens staked including tokens staked by validators and delegated by delegators.

Total Supply

The total STRK token supply.

Slashing

STRKSRB does not factor in the possibility of slashing occurrences.
It's important to note that if validator entities face slashing, rewards will increase, as the slashed tokens are reallocated among validators.

STRK Validator Staking Reward Rate: STRKSRB(v)

Staking Rewards calculates the STRKSRB for each validator based on their individual commission.

STRKSRB(v) = STRKSRB *(1-cr)

Formula key

Metric name

Description

Commission Rate

The percentage commission rate the validator has set as a delegation fee for all delegators.

Observation Period:

The STRKSRB is determined based on the latest generated block at the point of evaluation.
This data is then annualized for a comprehensive year-long projection.

Calculation

The calculation happens every 1o minutes and is immediately published via Data API.

Limitations

STRKSRB excludes rewards accrued from on-chain fees.
STRKSRB employs a 365-day convention for annualizing current slot times. This convention remains consistent and does not accommodate adjustments for leap years.

STRK Real Reward Rate: STRKSRB^R

The real reward rate calculates the STRKSRB adjusted for inflation in the network.

STRKSRB^R=1 + STRKSRB/(1+ir) -1

Formula key

Metric name

Description

Inflation Rate

The annual provisions divided by the circulating supply.

Inflation Rate Behavior

Starknet's inflation mechanism caps annual inflation at 4%, with a minting rate proportional to the square root of the staking rate—ensuring that the more tokens are staked, the higher the total minting but the lower individual staking rewards as a percentage. The minting curve aims to strike a balance between the needs of rewarding stakers and setting inflation expectations on Starknet.

Other Starknet metrics calculated by Staking Rewards:

Metric

Description

Delegated Tokens

The number of STRK tokens delegated to validators.

Self Staked Tokens

The number of STRK tokens self-staked by validators directly.

Staking Wallets

The total number of unique delegations on-chain.

BTC Staking on Starknet

Starknet operates a dual-token consensus model where both STRK and BTC contribute to network security. BTC holders stake tokenized BTC wrappers (WBTC, tBTC, SolvBTC, LBTC) on Starknet to earn STRK rewards.

BTC staking uses the same validators as STRK staking. Each validator can open delegation pools for BTC wrapper tokens via the staking contract. Reward options are tracked per validator and per wrapper.

BTC Staking Reward Rate

APR_{BTC} = (ym * \alpha * P_{STRK}) / (st_{BTC} * P_{BTC})

Formula key

Metric name

Description

Yearly Mint

Total STRK minted per year from the minting curve contract.

Alpha

BTC weight factor in consensus (currently 25%), sourced from the reward supplier contract.

P_STRK

STRK Price

Current STRK price in USD.

st_BTC

Total BTC Staked

Sum of all BTC wrapper tokens staked across WBTC, tBTC, SolvBTC, and LBTC.

P_BTC

BTC Price

Current BTC price in USD.

BTC stakers earn STRK rewards, not BTC. The effective APR depends on the STRK/BTC price ratio.
The alpha parameter (BTC weight) is controlled on-chain and can be adjusted by governance.

BTC Validator Staking Reward Rate: APR_BTC(v)

APR_{BTC}(v) = APR_{BTC} * (1 - cr)

Formula key

Metric name

Description

Commission Rate

The validator's commission rate, same as for STRK staking.

Each validator's BTC delegation pools are discovered via the staker_pool_info contract function.
A separate reward option is created per validator per BTC wrapper token.
Validators with 100% commission (private validators) are excluded.