Add comment about domain type reservation

ethereum · May 6, 2022 · 8384fd8 · 8384fd8
1 parent 207f287
commit 8384fd8
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/specs/bellatrix/beacon-chain.md b/specs/bellatrix/beacon-chain.md
@@ -70,7 +70,9 @@ Additionally, this upgrade introduces the following minor changes:
 
 | Name | Value |
 | - | - |
-| `DOMAIN_APPLICATION` | `DomainType('0x00000001')` |
+| `DOMAIN_APPLICATION_MASK` | `DomainType('0x00000001')` |
+
+*Note*: `DOMAIN_APPLICATION_MASK` reserves the rest of the bitspace in `DomainType` for application usage. This means for some `DomainType` `DOMAIN_SOME_APPLICATION`, `DOMAIN_SOME_APPLICATION && DOMAIN_APPLICATION_MASK` **MUST** be non-zero. This expression for any other `DomainType` in the consensus specs **MUST** be zero.
 
 ## Preset