added ORA to oracles folder in docs

docs/developers/tooling/oracles/ora.md

@@ -0,0 +1,75 @@
+---
+title: ORA
+image: /img/socialCards/ora.jpg
+---
+
+[ORA](https://ora.io) is Ethereum's Trustless AI. 
+As a verifiable oracle protocol, ORA brings AI and complex compute onchain.
+Its main product, **Onchain AI Oracle (OAO)**, integrates AI capabilities directly onchain.
+
+ORA breaks down the limitations of smart contracts by offering verifiable AI inference, so developers can innovate freely.
+
+## OAO Quickstart
+
+This quickstart is designed to help you to build a smart-contract on Linea able to interact with OAO. You can find more details in [our docs Quickstart](https://docs.ora.io/doc/oao-onchain-ai-oracle/develop-guide).
+
+### Workflow
+
+1. The user contract sends the AI request to OAO on Linea, by calling `requestCallback` function on the OAO contract.
+2. Each AI request will initiate an opML inference.
+3. OAO will emit a `requestCallback` event which will be collected by opML node.
+4. opML node will run the AI inference, and then upload the result on Linea, waiting for the challenge period.
+    1. During the challenge period, the opML validators will check the result, and challenge it if the submitted result is incorrect.
+    2. If the submitted result is successfully challenged by one of the validators, the submitted result will be updated on Linea.
+    3. After the challenge period, the submitted result on chain is finalized.
+5. When the result is uploaded or updated on Linea, the provided AI inference in opML will be dispatched to the user's smart contract via its specific callback function.
+
+## Integration
+
+### Overview
+
+To integrate with OAO, you will need to write your own contract.
+
+To build with AI models of OAO, we provided an example of contract using OAO: [Prompt](https://lineascan.build/address/0xC20DeDbE8642b77EfDb4372915947c87b7a526bD).
+
+### Smart Contract Integration
+
+1. Inherit `AIOracleCallbackReceiver` in your contract and bind with a specific OAO address:
+
+```solidity
+constructor(IAIOracle _aiOracle) AIOracleCallbackReceiver(_aiOracle) {}
+```
+
+2. Write your callback function to handle the AI result from OAO. Note that only OAO can call this function:
+
+```solidity
+function aiOracleCallback(uint256 requestId, bytes calldata output, bytes calldata callbackData) external override onlyAIOracleCallback()
+```
+
+3. When you want to initiate an AI inference request, call OAO as follows:
+
+```solidity
+aiOracle.requestCallback(modelId, input, address(this), gas_limit, callbackData);
+```
+
+## Reference
+
+**2 models** are available on Linea: Stable Diffusion (ID: 50) and Llama3 8B Instruct (ID: 11).
+
+[Prompt](https://docs.ora.io/doc/oao-onchain-ai-oracle/reference) and [SimplePrompt](https://docs.ora.io/doc/oao-onchain-ai-oracle/reference) are both example smart contracts interacted with OAO.
+
+For simpler application scenarios (eg. Prompt Engineering based AI like GPTs), you can directly use Prompt or SimplePrompt.
+
+SimplePrompt saves gas by only emitting the event without storing historical data.
+
+Linea mainnet: 
+
+- OAO Proxy: [0x0A0f4321214BB6C7811dD8a71cF587bdaF03f0A0](https://lineascan.build/address/0x0A0f4321214BB6C7811dD8a71cF587bdaF03f0A0)
+- Prompt: [0xC20DeDbE8642b77EfDb4372915947c87b7a526bD](https://lineascan.build/address/0xC20DeDbE8642b77EfDb4372915947c87b7a526bD)
+- SimplePrompt: [0xC3287BDEF03b925A7C7f54791EDADCD88e632CcD](https://lineascan.build/address/0xb880D47D3894D99157B52A7F869aB3B1E2D4349d)
+
+## Useful links:
+
+- Read [ORA documentation](https://docs.ora.io)
+- [Join our Discord](https://discord.gg/ora-io) where our team can help you
+- Follow us [on X](https://x.com/OraProtocol)

sidebars.js

@@ -350,6 +350,7 @@ const sidebars = {
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             "developers/tooling/oracles/chainlink",
             "developers/tooling/oracles/dia",
+            "developers/tooling/oracles/ora",
             "developers/tooling/oracles/pyth",
             "developers/tooling/oracles/redstone",
             "developers/tooling/oracles/supra",