diff --git a/README.md b/README.md
index b7c1e009a..26d9b93da 100644
--- a/README.md
+++ b/README.md
@@ -637,21 +637,19 @@ const passiveDelegationStatus = await client.getPoolStatus(blockHash);
 
 ## getRewardStatus
 Retrieves the current amount of funds in the system at a specific block, and the state of the special accounts. 
-Protocol version 4 expanded the amount of information in the response, so one should check the type to access that.
-This information includes information about the payday and total amount of funds staked.
 ```js
 const blockHash = "7f7409679e53875567e2ae812c9fcefe90ced8961d08554756f42bf268a42749";
 
 const rewardStatus = await client.getRewardStatus(blockHash);
+```
 
+Protocol version 4 expanded the amount of information in the response, so one should check the type to access that.
+This information includes information about the payday and total amount of funds staked.
+```js
 if (isRewardStatusV1(rewardStatus)) {
     const nextPaydayTime = rewardStatus.nextPaydayTime; 
     ...
-} else if (isRewardStatusV0(rewardStatus)) {
-    // This status is for a block from protocol version <= 3, so it will only have limited information
-    ...
 }
-...
 ```
 
 ## Check block for transfers with memo
diff --git a/src/blockSummaryHelpers.ts b/src/blockSummaryHelpers.ts
index d416f05bb..6577019a2 100644
--- a/src/blockSummaryHelpers.ts
+++ b/src/blockSummaryHelpers.ts
@@ -1,6 +1,5 @@
 import {
     Authorizations,
-    AuthorizationsV0,
     AuthorizationsV1,
     BlockSummary,
     BlockSummaryV0,
@@ -22,10 +21,6 @@ import {
 export const isAuthorizationsV1 = (a: Authorizations): a is AuthorizationsV1 =>
     (a as AuthorizationsV1).timeParameters !== undefined;
 
-export function isAuthorizationsV0(a: Authorizations): a is AuthorizationsV0 {
-    return (a as AuthorizationsV1).timeParameters === undefined;
-}
-
 export const isChainParametersV1 = (
     cp: ChainParameters
 ): cp is ChainParametersV1 =>
@@ -40,7 +35,7 @@ export const isKeysV1 = (k: Keys): k is KeysV1 =>
     isAuthorizationsV1(k.level2Keys);
 
 export const isKeysV0 = (k: Keys): k is KeysV0 =>
-    isAuthorizationsV0(k.level2Keys);
+    !isAuthorizationsV1(k.level2Keys);
 
 export const isUpdateQueuesV1 = (uq: UpdateQueues): uq is UpdateQueuesV1 =>
     (uq as UpdateQueuesV1).timeParameters !== undefined;
diff --git a/src/rewardStatusHelpers.ts b/src/rewardStatusHelpers.ts
index 8f41f7582..30697c623 100644
--- a/src/rewardStatusHelpers.ts
+++ b/src/rewardStatusHelpers.ts
@@ -1,9 +1,5 @@
-import { RewardStatus, RewardStatusV0, RewardStatusV1 } from './types';
+import { RewardStatus, RewardStatusV1 } from './types';
 
 export function isRewardStatusV1(rs: RewardStatus): rs is RewardStatusV1 {
     return rs.protocolVersion !== undefined && rs.protocolVersion > 3n;
 }
-
-export function isRewardStatusV0(rs: RewardStatus): rs is RewardStatusV0 {
-    return rs.protocolVersion === undefined || rs.protocolVersion <= 3n;
-}
diff --git a/yarn.lock b/yarn.lock
index 8e5d43db9..ff0f96876 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2120,6 +2120,11 @@ google-protobuf@3.15.8:
   resolved "https://registry.yarnpkg.com/google-protobuf/-/google-protobuf-3.15.8.tgz#5f3948905e4951c867d6bc143f385a80e2a39efe"
   integrity sha512-2jtfdqTaSxk0cuBJBtTTWsot4WtR9RVr2rXg7x7OoqiuOKopPrwXpM1G4dXIkLcUNRh3RKzz76C8IOkksZSeOw==
 
+google-protobuf@^3.20.1:
+  version "3.20.1"
+  resolved "https://registry.yarnpkg.com/google-protobuf/-/google-protobuf-3.20.1.tgz#1b255c2b59bcda7c399df46c65206aa3c7a0ce8b"
+  integrity sha512-XMf1+O32FjYIV3CYu6Tuh5PNbfNEU5Xu22X+Xkdb/DUexFlCzhvv7d5Iirm4AOwn8lv4al1YvIhzGrg2j9Zfzw==
+
 graceful-fs@^4.2.4:
   version "4.2.8"
   resolved "https://registry.yarnpkg.com/graceful-fs/-/graceful-fs-4.2.8.tgz#e412b8d33f5e006593cbd3cee6df9f2cebbe802a"