> For the complete documentation index, see [llms.txt](https://svpchain.gitbook.io/svpchain-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://svpchain.gitbook.io/svpchain-docs/ecosystem/oracle.md).

# Oracle

Reporter-based on-chain price feeds for DeFi integrations on SVPChain Testnet.

SVPChain Testnet deploys **reporter-based price feed contracts** for ecosystem and DeFi use — reading ETH/USD, BTC/USD, and stablecoin pairs from on-chain aggregator contracts.

{% hint style="warning" %}
This page is **not** the DEX / CLOB price oracle. Perpetual markets and the native order book use the **Slinky consensus oracle** (validator vote extensions). That system is documented in [DEX oracle (Slinky)](/svpchain-docs/chain/oracle.md).
{% endhint %}

### How it works

1. Authorized **reporters** submit off-chain market prices to feed contracts.
2. Each feed waits until **3 reporters** have submitted for the current round.
3. On update, the contract takes the **median** of reporter quotes.
4. Quotes that deviate from the median by more than **2%** (200 bps) are **discarded** before aggregation.

Integrate by calling the feed contract's latest price view functions from your dApp or indexer.

### Price feeds (testnet)

| Pair     | Contract                                     | Decimals | Reporters required | Max deviation |
| -------- | -------------------------------------------- | -------- | ------------------ | ------------- |
| ETH/USD  | `0x792d8A0a9A5Eb6CE0112A438D36052Feab851776` | 8        | 3                  | 2%            |
| BTC/USD  | `0x103589C2b63781e94C8Ee0Af921636A26c437B2C` | 8        | 3                  | 2%            |
| USDC/USD | `0xcCa35703d2CfA5Ac464c7098d82F2fcB2bF4e3d0` | 8        | 3                  | 2%            |
| USDT/USD | `0x9F0d5Aa185DAEC7636aDBB73ff4c767aa85A05c6` | 8        | 3                  | 2%            |
| DAI/USD  | `0xAE351F2dF66DF1A7d2eB0D7574BcDb909E680B56` | 8        | 3                  | 2%            |

### Management contracts

| Contract          | Address                                      | Purpose                                            |
| ----------------- | -------------------------------------------- | -------------------------------------------------- |
| Reporter registry | `0xfb6C039aE2c14A80af6EAf89dacAdC603e5342E0` | Manage which reporter addresses may submit prices  |
| Feed registry     | `0x91753702922aD6F2DdAcDbD3e1c201C869E98131` | Map trading pairs to their feed contract addresses |

### Active reporters (testnet)

```
0x2f49e41A7E0B5460301315b8A49C06107dd01d4d
0x067119e53437ad6DdA1BFBCFCc3Bd5f3765bE89F
0x7109733bf6D2bF45007fdeD0456E8fA9f07F0449
```

### Next steps

| Related                         | Link                                                                                            |
| ------------------------------- | ----------------------------------------------------------------------------------------------- |
| DEX / CLOB oracle (Slinky)      | [oracle.md](/svpchain-docs/chain/oracle.md)                                                     |
| DEX contracts (Uniswap V2 fork) | [testnet-contracts.md § DEX](/svpchain-docs/reference/testnet-contracts.md#dex-uniswap-v2-fork) |
| Network endpoints               | [networks.md](/svpchain-docs/chain/networks.md)                                                 |


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