From 01524aea841a1adba20a93eaa77ed3b427f7e6a6 Mon Sep 17 00:00:00 2001
From: Roy Crihfield <roy@manteia.ltd>
Date: Wed, 15 Dec 2021 21:42:29 +0800
Subject: [PATCH] js smt spec

---
 js/src/proofs.ts | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/js/src/proofs.ts b/js/src/proofs.ts
index 17ada759..3c93ce01 100644
--- a/js/src/proofs.ts
+++ b/js/src/proofs.ts
@@ -42,6 +42,25 @@ export const tendermintSpec: ics23.IProofSpec = {
   },
 };
 
+export const smtSpec: ics23.IProofSpec = {
+  leafSpec: {
+    hash: ics23.HashOp.SHA256,
+    prehashKey: ics23.HashOp.NO_HASH,
+    prehashValue: ics23.HashOp.SHA256,
+    length: ics23.LengthOp.NO_PREFIX,
+    prefix: Uint8Array.from([0]),
+  },
+  innerSpec: {
+    childOrder: [0, 1],
+    childSize: 32,
+    minPrefixLength: 1,
+    maxPrefixLength: 1,
+    emptyChild: new Uint8Array(32),
+    hash: ics23.HashOp.SHA256
+  },
+  maxDepth: 256,
+};
+
 export type CommitmentRoot = Uint8Array;
 
 // verifyExistence will throw an error if the proof doesn't link key, value -> root