> For the complete documentation index, see [llms.txt](https://docs.stakingrewards.com/staking-data/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.stakingrewards.com/staking-data/methodologies/chromia-srb.md).

# Chromia SRB

CHRSRB is a benchmark that represents the annualized staking rate for the CHR token.

CHRSRB is calculated and published by Staking Rewards via the [Chromia Profile](https://www.stakingrewards.com/asset/chromia) and [Data API](https://www.stakingrewards.com/data-api).

> **TL;DR:** Chromia staking rewards are determined by a protocol-set annual percentage rate from the staking smart contracts on Ethereum and BNB Chain. The rate is obtained from the contract's getActiveYieldRate method for the current epoch.

$$
CHRSRB = apr
$$

{% hint style="info" %}
Chromia is offering a smart contract staking solution while the mainnet is not live\
The mainnet is scheduled to go live in Q2 2024. The reward rate formula will be updated when that happens.
{% endhint %}

<table data-full-width="false"><thead><tr><th width="141">Formula key</th><th width="158">Metric name</th><th>Description</th></tr></thead><tbody><tr><td>apr</td><td>Annual Percentage Rate</td><td>The reward rate is set manually by the protocol in both smart contracts (ETH and BNB).<br><br>This is obtained by calling the method <em>getActiveYieldRate</em> from the contract <a href="https://etherscan.io/address/0xc7b0f970c1efbb181194fc15ccd5c4a2c2ab863b"><em>0xdD8bd1a9927aB550Cf2fC0a9da14702F9c09ac88</em> </a>with the current epoch as a parameter. The current epoch is obtained by calling the method <em>getCurrentEpoch</em> from the same contract.<br><br>This is a temporary reward distribution to early supporters of the protocol. The reward rate will be.</td></tr></tbody></table>

***

### CHR Real Reward Rate (CHRSRB^R)

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

$$
CHRSRB^R = 1+CHRSRB /(1+i)-1
$$

<table data-full-width="false"><thead><tr><th width="141">Formula Key</th><th width="158">Metric name</th><th>Description</th></tr></thead><tbody><tr><td>i</td><td>Inflation Rate</td><td>Total emission of new tokens, with vested contracts plus staking rewards</td></tr></tbody></table>

***

Data Sources:

* Chromia Staking Smart Contracts:
  * [Ethereum](https://etherscan.io/address/0xC7b0F970c1EFBB181194Fc15ccD5C4a2c2Ab863B)
  * [Binance-Smart-Chain](https://bscscan.com/address/0x6414FbBf1CC9d9253125e106435619577bAAc2aC)

***

#### References:

* [What is Chromia?](https://chromia.com/)

***

:books: [Learn more about CHR Staking](https://www.stakingrewards.com/asset/chromia)

:bar\_chart: [Calculate your CHR Staking Rewards](https://www.stakingrewards.com/calculator?asset=chromia)

:gear: [Access historic Chromia Staking Data via API](https://www.stakingrewards.com/data-api)

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Last updated on 05/23/2024
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