From 220afbff3599410764ea24219c84bbc1b3250b5d Mon Sep 17 00:00:00 2001
From: Gui Iribarren <gui@altermundi.net>
Date: Tue, 10 Dec 2024 11:50:56 +0100
Subject: [PATCH] tree/smt Processor now uses poseidon.MultiHash

---
 tree/smt/hash.go | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/tree/smt/hash.go b/tree/smt/hash.go
index 2fc896b..f4b1c52 100644
--- a/tree/smt/hash.go
+++ b/tree/smt/hash.go
@@ -3,17 +3,25 @@ package smt
 import (
 	"github.com/consensys/gnark/frontend"
 
-	"github.com/mdehoog/poseidon/circuits/poseidon"
+	"github.com/vocdoni/gnark-crypto-primitives/hash/bn254/poseidon"
 )
 
 // based on https://github.com/iden3/circomlib/blob/master/circuits/smt/smthash_poseidon.circom
 
 func Hash1(api frontend.API, key, value frontend.Variable) frontend.Variable {
 	inputs := []frontend.Variable{key, value, 1}
-	return poseidon.Hash(api, inputs)
+	hash, err := poseidon.MultiHash(api, inputs...)
+	if err != nil {
+		panic(err)
+	}
+	return hash
 }
 
 func Hash2(api frontend.API, l, r frontend.Variable) frontend.Variable {
 	inputs := []frontend.Variable{l, r}
-	return poseidon.Hash(api, inputs)
+	hash, err := poseidon.MultiHash(api, inputs...)
+	if err != nil {
+		panic(err)
+	}
+	return hash
 }