Shorten relay read time resolver key prefix

Reviewed By: evanyeung

Differential Revision: D68988060

fbshipit-source-id: 0cf31cf58d779572a4e8bdadf339595826756506

Author: tyao1

packages/react-relay/__tests__/LiveResolvers-test.js

@@ -1506,7 +1506,7 @@ describe('client-only fragments', () => {
     expect(() => {
       GLOBAL_STORE.dispatch({type: 'INCREMENT'});
     }).toThrowError(
-      'Unexpected LiveState value returned from Relay Resolver internal field `RELAY_RESOLVER_LIVE_STATE_VALUE`. It is likely a bug in Relay, or a corrupt state of the relay store state Field Path `counter_suspends_when_odd`. Record `{"__id":"client:1:read_time_resolver:counter_suspends_when_odd","__typename":"__RELAY_RESOLVER__","__resolverError":null,"__resolverValue":{"__LIVE_RESOLVER_SUSPENSE_SENTINEL":true},"__resolverLiveStateDirty":true}`.',
+      'Unexpected LiveState value returned from Relay Resolver internal field `RELAY_RESOLVER_LIVE_STATE_VALUE`. It is likely a bug in Relay, or a corrupt state of the relay store state Field Path `counter_suspends_when_odd`. Record `{"__id":"client:1:$r:counter_suspends_when_odd","__typename":"__RELAY_RESOLVER__","__resolverError":null,"__resolverValue":{"__LIVE_RESOLVER_SUSPENSE_SENTINEL":true},"__resolverLiveStateDirty":true}`.',
     );
     // $FlowFixMe[incompatible-use]
     expect(renderer.toJSON()).toEqual('Loading...');

packages/relay-runtime/store/RelayStoreUtils.js

@@ -45,7 +45,7 @@ const ERRORS_KEY: '__errors' = '__errors';
 const MODULE_COMPONENT_KEY_PREFIX = '__module_component_';
 const MODULE_OPERATION_KEY_PREFIX = '__module_operation_';
 
-const RELAY_READ_TIME_RESOLVER_KEY_PREFIX = 'read_time_resolver:';
+const RELAY_READ_TIME_RESOLVER_KEY_PREFIX = '$r:';
 
 function getArgumentValue(
   arg: NormalizationArgument | ReaderArgument,