kalshi-sdk/dist/index.js

A public TypeScript SDK for Kalshi (https://kalshi.com/)

var __async = (__this, __arguments, generator) => {
  return new Promise((resolve, reject) => {
    var fulfilled = (value) => {
      try {
        step(generator.next(value));
      } catch (e) {
        reject(e);
      }
    };
    var rejected = (value) => {
      try {
        step(generator.throw(value));
      } catch (e) {
        reject(e);
      }
    };
    var step = (x) => x.done ? resolve(x.value) : Promise.resolve(x.value).then(fulfilled, rejected);
    step((generator = generator.apply(__this, __arguments)).next());
  });
};

// src/kalshi/kalshiClient.ts
import axios from "axios";
import crypto from "crypto";
import fs from "fs";

// src/constants/constants.ts
var KALSHI_DEFAULT_URL = "https://api.elections.kalshi.com";

// src/kalshi/marketClient.ts
var KalshiMarketsClient = class {
  constructor(client) {
    this.client = client;
  }
  getEvents(eventsRequest) {
    return __async(this, null, function* () {
      return this.client.sendGetRequest(
        `${this.client.apiUrl}/trade-api/v2/events`,
        eventsRequest
      );
    });
  }
  getEvent(eventTicker, with_nested_markets) {
    return __async(this, null, function* () {
      return this.client.sendGetRequest(
        `${this.client.apiUrl}/trade-api/v2/events/${eventTicker}`,
        { with_nested_markets }
      );
    });
  }
  getMarkets(marketsRequest) {
    return __async(this, null, function* () {
      return this.client.sendGetRequest(
        `${this.client.apiUrl}/trade-api/v2/markets`,
        marketsRequest
      );
    });
  }
  getMarket(marketTicker) {
    return __async(this, null, function* () {
      return this.client.sendGetRequest(
        `${this.client.apiUrl}/trade-api/v2/markets/${marketTicker}`
      );
    });
  }
  getTrades(tradeRequest) {
    return __async(this, null, function* () {
      return this.client.sendGetRequest(
        `${this.client.apiUrl}/trade-api/v2/trades`,
        tradeRequest
      );
    });
  }
  getMarketOrderBook(marketTicker, depth) {
    return __async(this, null, function* () {
      return this.client.sendGetRequest(
        `${this.client.apiUrl}/trade-api/v2/markets/${marketTicker}/orderbook`,
        { depth }
      );
    });
  }
  getSeries(seriesTicker) {
    return __async(this, null, function* () {
      return this.client.sendGetRequest(
        `${this.client.apiUrl}/trade-api/v2/series/${seriesTicker}`
      );
    });
  }
  getMarketCandlesticks(ticker, seriesTicker, candleStickRequest) {
    return __async(this, null, function* () {
      return this.client.sendGetRequest(
        `${this.client.apiUrl}/trade-api/v2/series/${seriesTicker}/markets/${ticker}/candlesticks`
      );
    });
  }
  createKalshiOrder(orderRequest) {
    return __async(this, null, function* () {
      return this.client.sendWriteRequest(
        `${this.client.apiUrl}/trade-api/v2/portfolio/orders`,
        "POST",
        orderRequest
      );
    });
  }
  cancelKalshiOrder(orderId) {
    return __async(this, null, function* () {
      return this.client.sendWriteRequest(
        `${this.client.apiUrl}/trade-api/v2/portfolio/orders/${orderId}`,
        "DELETE"
      );
    });
  }
};

// src/kalshi/exchangeClient.ts
var KalshiExchangeClient = class {
  constructor(client) {
    this.client = client;
  }
  getExchangeAnnouncment() {
    return __async(this, null, function* () {
      const response = yield this.client.sendGetRequest(
        `${this.client.apiUrl}/trade-api/v2/exchange/announcements`
      );
      return response.announcements;
    });
  }
  getExchangeSchedule() {
    return __async(this, null, function* () {
      return this.client.sendGetRequest(
        `${this.client.apiUrl}/trade-api/v2/exchange/schedule`
      );
    });
  }
  getExchangeStatus() {
    return __async(this, null, function* () {
      return this.client.sendGetRequest(
        `${this.client.apiUrl}/trade-api/v2/xchange/status`
      );
    });
  }
};

// src/kalshi/collectionsClient.ts
var KalshiCollectionsClient = class {
  constructor(client) {
    this.client = client;
  }
  getMultivariateEventCollections(params) {
    return __async(this, null, function* () {
      return this.client.sendGetRequest(
        `${this.client.apiUrl}/trade-api/v2/multivariate_event_collections/`,
        params
      );
    });
  }
  getMultivariateEventCollection(collectionTicker) {
    return __async(this, null, function* () {
      return this.client.sendGetRequest(
        `${this.client.apiUrl}/trade-api/v2/multivariate_event_collections/${collectionTicker}`
      );
    });
  }
  createMarketInMultivariateEventCollection(collectionTicker, selectedMarkets) {
    return __async(this, null, function* () {
      return this.client.sendWriteRequest(
        `${this.client.apiUrl}/trade-api/v2/multivariate_event_collections/${collectionTicker}`,
        "POST",
        { selected_markets: selectedMarkets }
      );
    });
  }
  getMultivariateEventCollectionLookupHistory(collectionTicker, lookbackSeconds) {
    return __async(this, null, function* () {
      const response = yield this.client.sendGetRequest(
        `${this.client.apiUrl}/trade-api/v2/multivariate_event_collections/${collectionTicker}/lookup`,
        { lookback_seconds: lookbackSeconds }
      );
      return response.lookup_points;
    });
  }
  lookupTickersForMarketInMultivariateEventCollection(collectionTicker, selectedMarkets) {
    return __async(this, null, function* () {
      return this.client.sendWriteRequest(
        `${this.client.apiUrl}/trade-api/v2/multivariate_event_collections/${collectionTicker}/lookup`,
        "PUT",
        { selected_markets: selectedMarkets }
      );
    });
  }
};

// src/kalshi/kalshiClient.ts
var CRYPTO_SIGNING_TYPE = "sha256";
var KalshiClient = class _KalshiClient {
  constructor(key, kalshiAPIid, apiUrl) {
    this.privateKey = key;
    this.kalshiAPIId = kalshiAPIid;
    this.apiUrl = apiUrl || KALSHI_DEFAULT_URL;
    this.markets = new KalshiMarketsClient(this);
    this.exchange = new KalshiExchangeClient(this);
    this.collections = new KalshiCollectionsClient(this);
  }
  static fromFile(filePath, kalshiAPIId, apiUrl) {
    const keyData = fs.readFileSync(filePath, "utf8");
    return new _KalshiClient(
      crypto.createPrivateKey({
        key: keyData,
        format: "pem"
      }),
      kalshiAPIId,
      apiUrl
    );
  }
  static fromKey(key, kalshiAPIId, apiUrl) {
    return new _KalshiClient(key, kalshiAPIId, apiUrl);
  }
  ////////////////////// HELPERS //////////////////////
  signPssText(privateKey, text) {
    const message = Buffer.from(text, "utf-8");
    try {
      const signature = crypto.sign(CRYPTO_SIGNING_TYPE, message, {
        key: privateKey,
        padding: crypto.constants.RSA_PKCS1_PSS_PADDING,
        saltLength: crypto.constants.RSA_PSS_SALTLEN_DIGEST
      });
      return signature.toString("base64");
    } catch (error) {
      throw new Error("RSA sign PSS failed: " + error.message);
    }
  }
  generateRequestHeaders(path, method) {
    const currentTime = /* @__PURE__ */ new Date();
    const currentTimeMilliseconds = currentTime.getTime();
    const timestampStr = currentTimeMilliseconds.toString();
    const msgString = timestampStr + method + path;
    const sig = this.signPssText(this.privateKey, msgString);
    const headers = {
      "KALSHI-ACCESS-KEY": this.kalshiAPIId,
      "KALSHI-ACCESS-SIGNATURE": sig,
      "KALSHI-ACCESS-TIMESTAMP": timestampStr,
      "Content-Type": "application/json"
    };
    return headers;
  }
  sendWriteRequest(url, method, body) {
    return __async(this, null, function* () {
      let axiosFunc;
      const headers = this.generateRequestHeaders(url, method);
      switch (method) {
        case "POST":
          axiosFunc = axios.post;
          break;
        case "PUT":
          axiosFunc = axios.put;
          break;
        case "DELETE":
          axiosFunc = axios.delete;
          break;
      }
      try {
        const response = yield this.sendWithRetries(() => axiosFunc(`${url}`, body, { headers }));
        return response.data;
      } catch (error) {
        console.error(error);
        throw error;
      }
    });
  }
  sendGetRequest(url, params) {
    return __async(this, null, function* () {
      const headers = this.generateRequestHeaders(url, "GET");
      try {
        const response = yield this.sendWithRetries(() => axios.get(url, { headers, params }));
        return response.data;
      } catch (error) {
        console.error(error);
        throw error;
      }
    });
  }
  sendWithRetries(func, retries = 3) {
    return __async(this, null, function* () {
      var _a;
      for (let attempt = 1; attempt <= retries; attempt++) {
        try {
          return yield func();
        } catch (error) {
          if (((_a = error.response) == null ? void 0 : _a.status) === 429) {
            const delay = attempt * 250;
            yield new Promise((res) => setTimeout(res, delay));
          } else {
            throw error;
          }
        }
      }
      throw new Error(`Request failed after ${retries} attempts`);
    });
  }
};
export {
  KalshiClient
};