From 1592597d9309e2d8a145961f2c7e19d9f8061be6 Mon Sep 17 00:00:00 2001
From: Justin Starry <justin@solana.com>
Date: Fri, 14 Aug 2020 10:06:37 +0800
Subject: [PATCH] Explorer: Fix stake account validation (#11623)

---
 explorer/src/components/account/StakeAccountSection.tsx | 2 +-
 explorer/src/validators/accounts/stake.ts               | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/explorer/src/components/account/StakeAccountSection.tsx b/explorer/src/components/account/StakeAccountSection.tsx
index cca16dd0cb..bebb36dfeb 100644
--- a/explorer/src/components/account/StakeAccountSection.tsx
+++ b/explorer/src/components/account/StakeAccountSection.tsx
@@ -12,7 +12,7 @@ import {
 } from "validators/accounts/stake";
 import BN from "bn.js";
 
-const MAX_EPOCH = new BN(2).pow(new BN(64));
+const MAX_EPOCH = new BN(2).pow(new BN(64)).sub(new BN(1));
 
 export function StakeAccountSection({
   account,
diff --git a/explorer/src/validators/accounts/stake.ts b/explorer/src/validators/accounts/stake.ts
index 6dae5ab143..05174d08b7 100644
--- a/explorer/src/validators/accounts/stake.ts
+++ b/explorer/src/validators/accounts/stake.ts
@@ -1,4 +1,4 @@
-import { object, StructType, number, optional, enums } from "superstruct";
+import { object, StructType, number, nullable, enums } from "superstruct";
 import { Pubkey } from "validators/pubkey";
 import { BigNum } from "validators/bignum";
 
@@ -27,7 +27,7 @@ export const StakeMeta = object({
 export type StakeAccountInfo = StructType<typeof StakeAccountInfo>;
 export const StakeAccountInfo = object({
   meta: StakeMeta,
-  stake: optional(
+  stake: nullable(
     object({
       delegation: object({
         voter: Pubkey,