The public kernel, not the whole closet. Real stock candles enter, SOL margin gates the intent, and the local order tape records the signal without pretending to be a live vault.

// suits/vault-kernel.ts
// Short The Suits — SOL-settled synthetic stock intent layer
// real candles in; fake broker out.

type Candle = {
  time: number;
  open: number;
  high: number;
  low: number;
  close: number;
  volume: number;
};

type VaultIntent = {
  market: "TSLA" | "NVDA" | "AAPL" | "MSFT" | "COIN";
  side: "LONG" | "SHORT";
  collateralSol: number;
  leverage: 1 | 2 | 3 | 5 | 10;
  wallet: string;
};

const MARKETS = new Set([
  "TSLA", "NVDA", "MSTR", "COIN", "AMD", "META", "AMZN",
  "AAPL", "MSFT", "GOOGL", "MRVL", "PLTR", "HOOD", "INTC", "NFLX",
]);

export async function pullOhlc(symbol: string): Promise<Candle[]> {
  const market = MARKETS.has(symbol) ? symbol : "TSLA";
  const endpoint = `/api/chart?symbol=${market}`;
  const feed = await fetch(endpoint).then((r) => r.json());

  return feed.candles
    .filter((c: Candle) => [c.open, c.high, c.low, c.close].every(Number.isFinite))
    .slice(-90);
}

export function markPrice(candles: Candle[]) {
  const last = candles.at(-1)!;
  const first = candles[0];
  const change = last.close - first.close;

  return {
    price: last.close,
    momentum: change / first.close,
    range: Math.max(...candles.map((c) => c.high)) - Math.min(...candles.map((c) => c.low)),
  };
}

export async function connectSolIntent() {
  const wallets = detectSolanaProviders();
  const selected = wallets.find((w) => w.name === "Phantom") ?? wallets[0];
  const session = await selected.provider.connect();

  return {
    wallet: selected.name,
    publicKey: session.publicKey.toString(),
  };
}

export function stageIntent(intent: VaultIntent) {
  if (!intent.wallet) throw new Error("SOL wallet required");
  if (intent.collateralSol <= 0) throw new Error("collateral must be positive");

  const notionalSol = intent.collateralSol * intent.leverage;
  const liquidationBand = intent.side === "LONG" ? "below mark" : "above mark";

  return {
    id: crypto.randomUUID(),
    ...intent,
    notionalSol,
    liquidationBand,
    status: "STAGED_NOT_EXECUTED",
  };
}

// invariant:
// SOL collateral gates every stock intent.
// K-line data is real OHLC.
// demo trades never claim settlement until a vault exists.