feat: stupid random tests

lnbits/extensions/cashu/static/js/dhke.js

@@ -0,0 +1,31 @@
+async function hashToCurve(secretMessage) {
+  let point
+  while (!point) {
+    const hash = await nobleSecp256k1.utils.sha256(secretMessage)
+    try {
+      point = nobleSecp256k1.Point.fromHex(hash)
+    } catch (error) {
+      // console.error(error)
+      // const x = bytesToNumber(hash) + ''
+      // const msg = await nobleSecp256k1.utils.sha256(x)
+      secretMessage = await nobleSecp256k1.utils.sha256(hash)
+      // secretMessage = nobleSecp256k1.utils.bytesToHex(msg)
+    }
+  }
+  return point
+}
+
+async function step1Bob(secretMessage) {
+  const Y = await hashToCurve(secretMessage)
+  const randomBlindingFactor = bytesToNumber(
+    nobleSecp256k1.utils.randomPrivateKey()
+  )
+  const P = nobleSecp256k1.Point.fromPrivateKey(randomBlindingFactor)
+  const B_ = Y.add(P)
+  return {B_, randomBlindingFactor}
+}
+
+function step3Bob(C_, r, A) {
+  const C = C_.subtract(A.multiply(r))
+  return C
+}