From 5b8a5ea690b6f4158368c2f281dd2e614574d391 Mon Sep 17 00:00:00 2001
From: Chirantan Ekbote <cekbote@jumptrading.com>
Date: Thu, 25 Aug 2022 17:51:17 +0900
Subject: [PATCH] staking: Fix potential division-by-zero

`v.DelegatorShares` can be 0 so don't allow division in that case.
---
 x/staking/types/validator.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/x/staking/types/validator.go b/x/staking/types/validator.go
index e4dd25dc6..d26c46abf 100644
--- a/x/staking/types/validator.go
+++ b/x/staking/types/validator.go
@@ -304,6 +304,9 @@ func (v Validator) InvalidExRate() bool {
 
 // calculate the token worth of provided shares
 func (v Validator) TokensFromShares(shares sdk.Dec) sdk.Dec {
+	if v.DelegatorShares.IsZero() {
+		return sdk.Dec(sdk.ZeroInt())
+	}
 	return (shares.MulInt(v.Tokens)).Quo(v.DelegatorShares)
 }