From 38a650f30764b6c015732cffc240dbca9c2a777f Mon Sep 17 00:00:00 2001
From: willclarktech <willclarktech@users.noreply.github.com>
Date: Wed, 24 Mar 2021 16:35:12 +0100
Subject: [PATCH] amino: Transfer paths from launchpad

---
 packages/amino/src/paths.spec.ts | 26 ++++++++++++++++++++++++++
 packages/amino/src/paths.ts      | 15 +++++++++++++++
 2 files changed, 41 insertions(+)
 create mode 100644 packages/amino/src/paths.spec.ts
 create mode 100644 packages/amino/src/paths.ts

diff --git a/packages/amino/src/paths.spec.ts b/packages/amino/src/paths.spec.ts
new file mode 100644
index 00000000..17fd85b6
--- /dev/null
+++ b/packages/amino/src/paths.spec.ts
@@ -0,0 +1,26 @@
+import { Slip10RawIndex } from "@cosmjs/crypto";
+
+import { makeCosmoshubPath } from "./paths";
+
+describe("paths", () => {
+  describe("makeCosmoshubPath", () => {
+    it("works", () => {
+      // m/44'/118'/0'/0/0
+      expect(makeCosmoshubPath(0)).toEqual([
+        Slip10RawIndex.hardened(44),
+        Slip10RawIndex.hardened(118),
+        Slip10RawIndex.hardened(0),
+        Slip10RawIndex.normal(0),
+        Slip10RawIndex.normal(0),
+      ]);
+      // m/44'/118'/0'/0/123
+      expect(makeCosmoshubPath(123)).toEqual([
+        Slip10RawIndex.hardened(44),
+        Slip10RawIndex.hardened(118),
+        Slip10RawIndex.hardened(0),
+        Slip10RawIndex.normal(0),
+        Slip10RawIndex.normal(123),
+      ]);
+    });
+  });
+});
diff --git a/packages/amino/src/paths.ts b/packages/amino/src/paths.ts
new file mode 100644
index 00000000..bf4dd185
--- /dev/null
+++ b/packages/amino/src/paths.ts
@@ -0,0 +1,15 @@
+import { HdPath, Slip10RawIndex } from "@cosmjs/crypto";
+
+/**
+ * The Cosmos Hub derivation path in the form `m/44'/118'/0'/0/a`
+ * with 0-based account index `a`.
+ */
+export function makeCosmoshubPath(a: number): HdPath {
+  return [
+    Slip10RawIndex.hardened(44),
+    Slip10RawIndex.hardened(118),
+    Slip10RawIndex.hardened(0),
+    Slip10RawIndex.normal(0),
+    Slip10RawIndex.normal(a),
+  ];
+}