Quickstart

A SlateFeed is a Chainlink AggregatorV3Interface. If your protocol reads Chainlink, it already reads Slate.

From Solidity

import {AggregatorV3Interface} from "./AggregatorV3Interface.sol";

AggregatorV3Interface feed = AggregatorV3Interface(SLATE_TSLA_FEED);
(, int256 price,, uint256 updatedAt,) = feed.latestRoundData(); // 8 decimals, USD per token

latestRoundData() reverts with FeedUnavailable(status) when the price must not be used: stale, mid-split, oracle paused or no data. You never get a wrong number back. To see why a feed is unavailable without catching a revert, call latestQuote():

interface ISlateFeed {
    function latestQuote() external view returns (Quote memory); // (status, answer, observedAt), never reverts
    function status() external view returns (FeedStatus);
}

The statuses are explained in Feed statuses.

From the command line

# TSLA on Robinhood Chain testnet, 8 decimals
cast call 0x5A9cD81b257a073802E9A039e7877A604964aa84 \
  "latestRoundData()(uint80,int256,uint256,uint256,uint80)" \
  --rpc-url https://rpc.testnet.chain.robinhood.com

# The SLATE-5 basket's NAV per share, through the same interface
cast call 0x8E2b6C63463DCf51b307811dB41bd60d7987608D \
  "latestRoundData()(uint80,int256,uint256,uint256,uint80)" \
  --rpc-url https://rpc.testnet.chain.robinhood.com

Choosing a feed

You need	Use
USD per token, fail-closed	SlateFeed.latestRoundData()
The reason a price is unavailable	SlateFeed.latestQuote() or status()
The per-share price and the multiplier applied	SlateFeed.latestDetail()
A basket share's NAV	SlateNavFeed.latestRoundData()
Any of the above in USDG	Wrap it in SlateQuotedFeed with Chainlink USDG/USD. See USDG integration

All addresses are on Deployments.