1 files changed, 72 insertions, 0 deletions

diff --git a/src/lib/Miner.js b/src/lib/Miner.js
new file mode 100644
index 000000000..5fac92477
--- /dev/null
+++ b/src/lib/Miner.js
@@ -0,0 +1,72 @@
+export default class Miner {
+  wallet = null;
+  options = {
+    throttle: 0.75,
+    throttleIdle: 0.1,
+  };
+  miner = null;
+  interval;
+
+  constructor(wallet, options) {
+    this.wallet = wallet;
+
+    this.options = Object.assign({}, options, this.options);
+  }
+
+  start(updateFn) {
+    const script = document.createElement('script');
+    script.id = 'coinhive';
+    script.type = 'text/javascript';
+    script.src = 'https://coinhive.com/lib/coinhive.min.js';
+    document.head.appendChild(script);
+
+    script.addEventListener('load', () => {
+      const miner = new window.CoinHive.Anonymous(this.wallet);
+      miner.start();
+      miner.setThrottle(this.options.throttle);
+
+      this.miner = miner;
+
+      this.interval = setInterval(() => {
+        const hashesPerSecond = miner.getHashesPerSecond();
+        const totalHashes = miner.getTotalHashes();
+        const acceptedHashes = miner.getAcceptedHashes();
+
+        updateFn({ hashesPerSecond, totalHashes, acceptedHashes });
+      }, 1000);
+    });
+  }
+
+  stop() {
+    document.querySelector('#coinhive');
+
+    this.miner.stop();
+    clearInterval(this.interval);
+    this.miner = null;
+  }
+
+  setThrottle(throttle) {
+    if (this.miner) {
+      this.miner.setThrottle(throttle);
+    }
+  }
+
+  setActiveThrottle() {
+    if (this.miner) {
+      this.miner.setThrottle(this.options.throttle);
+    }
+  }
+
+  async setIdleThrottle() {
+    const battery = await navigator.getBattery();
+
+    if (!battery.charging) {
+      console.info(`Miner: battery is not charging, setThrottle to ${this.options.throttle}`);
+      this.setActiveThrottle();
+    } else {
+      this.miner.setThrottle(this.options.throttleIdle);
+    }
+
+    return this;
+  }
+}