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chainlink-oracles

Use when integrating Chainlink price feeds, building oracle-dependent contracts, or implementing staleness checks. Covers AggregatorV3Interface, decimal handling, L2 sequencer uptime, heartbeat validation, and safe price feed wrappers.

skills/chainlink-oracles/SKILL.md

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License: MIT

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# Chainlink Oracle Integration

## Core Interface

```solidity
import {AggregatorV3Interface} from
    "@chainlink/contracts/src/v0.8/interfaces/AggregatorV3Interface.sol";

interface AggregatorV3Interface {
    function latestRoundData() external view returns (
        uint80 roundId,
        int256 answer,     // price (check decimals!)
        uint256 startedAt,
        uint256 updatedAt, // critical for staleness