SlateFeed

SlateFeed prices one stock token in USD with 8 decimals. It implements AggregatorV3Interface plus:

function latestQuote() external view returns (Quote memory);  // (status, answer, observedAt); never reverts
function latestDetail() external view returns (Quote memory, int256 sharePrice, uint256 multiplier);
function status() external view returns (FeedStatus);
function poke() external returns (bool);                     // record a staged multiplier change
function token() external view returns (address);

getRoundData reverts with NoHistory(): a Slate feed is a current price, not an archive.

Configuration

Each feed is immutable once deployed:

Field	Meaning	Testnet value
token	The stock token	e.g. TSLA 0xC9f9…Bd4E
model	ERC8056, REBASING (Robinhood's legacy Arbitrum One tokens) or NONE	ERC8056
source	Where share prices come from (SignedSource, ChainlinkSource)	SignedSource
feedId	The source's key, e.g. bytes32("TSLA/USD")
maxAge	Oldest usable price while the market is open	20 minutes
corporateActionGrace	Refusal window after a large multiplier change	30 minutes
largeChangeBps	What counts as large	500 (5%)
allowMarketClosed	Whether latestRoundData() serves MARKET_CLOSED prices	true
calendar, session	Trading calendar and session	USMarketCalendar, EXTENDED

On Robinhood Chain mainnet, CRWD's feed accepts prices up to 40 minutes old, because the publisher signs it on a 0.5% move or every 30 minutes to keep mainnet gas low.

Models

• ERC8056 (Robinhood Chain): token price = share price × the multiplier in force when the price was observed. See The multiplier problem.
• REBASING (Robinhood's earlier tokens on Arbitrum One): balanceOf already includes multiplier(), so one token is one share-equivalent and the price is the share price. Applying the multiplier here would be the double count.
• NONE: a plain ERC-20; one token is one share.

Sources

Source	Kind	Used for
SignedSource	RAW_UNDERLYING	Tokens with no Chainlink feed. See Signed prices
ChainlinkSource over Robinhood's feeds	TOTAL_RETURN	The 35 tokens Chainlink covers on Robinhood Chain
ChainlinkSource over raw equity feeds	RAW_UNDERLYING	Chainlink's 9 raw equity feeds on Arbitrum One

A Chainlink answer that reverts or is non-positive reads as NO_DATA; it never reaches a caller.

Deploying

SlateFeedFactory.deploy(config, salt) deploys at a CREATE2 address salted by the caller, so nobody can squat your address. deployCalibrated(config, salt, reference, maxDiffBps) deploys and then reverts unless the new feed agrees with an independent reference. This is the deploy-time guard against a source declared with the wrong price kind.