Handel

{ "order": 16901, "filled": 0, "remaining": 10, "spent": 0, "proceeds": 0 }

{ "order": null, "filled": 10.6844, "remaining": 0, "spent": 4.999974, "proceeds": 0,
  "requested": 5, "fee": 0.18515, "avgPrice": 45.064056006888556, "unspent": 0.000026, "status": "filled" }

{ "order": null, "filled": 0, "remaining": 0, "spent": 0, "proceeds": 0, "requested": 5, "fee": 0, "avgPrice": null,
  "unspent": 5, "status": "none", "reason": "beyond_limit", "limit": 1, "bestPrice": 16 }

# two orders in one request (on seeryx.com each also carries its own "signed")
curl -s -X POST https://seeryx.com/api/orders/batch \
  -H "X-Auth-Token: $TOKEN" -H "Idempotency-Key: $(uuidgen)" -H "Content-Type: application/json" \
  -d '{"orders":[{"slug":"btc-updown-5m-1791916200","side":"up","action":"buy","type":"limit","shares":5,"limit":40},
                 {"slug":"btc-updown-5m-1791916200","side":"down","action":"buy","type":"limit","shares":5,"limit":40}]}'
# {"results":[{"status":200,"body":{"order":21306,...}},{"status":200,"body":{"order":21307,...}}]}

# cancel everything still resting in the round
curl -s -X DELETE "https://seeryx.com/api/orders?slug=btc-updown-5m-1791916200" -H "X-Auth-Token: $TOKEN" -H "Idempotency-Key: $(uuidgen)"
# {"success":true,"cancelled":[21306,21307]}

// trading.ts: limit, market and batch orders, cancels, split and merge. npx tsx trading.ts
import { api, loadWallet, signIn, type Book, type Round } from './seeryx';
import { signOrder, signPair, tradingSession, type Funds, type Order } from './chain';

const wallet = await loadWallet();
await signIn(wallet);
const funds = await api<Funds>('/funds');
// where GET /api/funds says onChainTrading (always on seeryx.com) every order carries `signed`
const session = funds.mode === 'chain' && funds.onChainTrading ? await tradingSession(funds, wallet) : null;
const sign = async (order: Order) => (session ? signOrder(funds, session, wallet.address, order) : order);
const place = async (order: Order) =>
  api<{ order: number | null }>('/orders', { method: 'POST', body: await sign(order) });
const { slug } = await api<Round>('/markets/BTC/5m/current');
const up = await api<Book>(`/orderbook/${slug}?side=up`), down = await api<Book>(`/orderbook/${slug}?side=down`);
const below = (book: Book, cents: number) => Math.max(1, Math.floor(book.asks[0]?.[0] ?? 50) - cents); // under the best ask

// limit: buy 10 Up shares 5c under the best ask, resting in the book; postOnly refuses it if it would trade at once
const limit = await place({
  slug, side: 'up', action: 'buy', type: 'limit', shares: 10, limit: below(up, 5), postOnly: true,
});

// market: spend up to $5 on Down, paying at most 2c over the best ask; what the book cannot fill is dropped
const cap = Math.min(99, Math.ceil(down.asks[0]?.[0] ?? 50) + 2);
const market = await place({ slug, side: 'down', action: 'buy', type: 'market', amount: 5, cap });
console.log({ limit, market });

// up to 15 orders in one request, placed in this order; each answer is what POST /orders would have said
const orders = await Promise.all([
  sign({ slug, side: 'up', action: 'buy', type: 'limit', shares: 5, limit: below(up, 10) }),
  sign({ slug, side: 'down', action: 'buy', type: 'limit', shares: 5, limit: below(down, 10) }),
]);
console.log({ batch: await api('/orders/batch', { method: 'POST', body: { orders } }) });

// cancel one order, then everything still resting in this round
if (limit.order) await api(`/orders/${limit.order}`, { method: 'DELETE' });
console.log({ cancelled: await api(`/orders?slug=${slug}`, { method: 'DELETE' }) });

// split $5 into 5 Up + 5 Down shares, then merge them back into $5
const pair = (merge: boolean) =>
  (session ? signPair(funds, session, wallet.address, slug, merge, 5) : undefined);
await api('/split', { method: 'POST', body: { slug, amount: 5, signed: await pair(false) } });
await api('/merge', { method: 'POST', body: { slug, shares: 5, signed: await pair(true) } });