2 files changed, 12 insertions, 0 deletions
diff --git a/packages/types/CHANGELOG.md b/packages/types/CHANGELOG.md
index 899482c4c..e75d0ddcb 100644
--- a/packages/types/CHANGELOG.md
+++ b/packages/types/CHANGELOG.md
@@ -1,3 +1,5 @@
 # CHANGELOG
 
 ## vx.x.x
+
+    * Added BlockLiteralParam and BlockParam, refactored out of 0x.js types. (#355)
diff --git a/packages/types/src/index.ts b/packages/types/src/index.ts
index 7b53b52c4..cb17936f7 100644
--- a/packages/types/src/index.ts
+++ b/packages/types/src/index.ts
@@ -56,3 +56,13 @@ export enum SolidityTypes {
 export interface TransactionReceiptWithDecodedLogs extends TransactionReceipt {
     logs: Array<LogWithDecodedArgs<DecodedLogArgs> | Web3.LogEntry>;
 }
+
+// Earliest is omitted by design. It is simply an alias for the `0` constant and
+// is thus not very helpful. Moreover, this type is used in places that only accept
+// `latest` or `pending`.
+export enum BlockParamLiteral {
+    Latest = 'latest',
+    Pending = 'pending',
+}
+
+export type BlockParam = BlockParamLiteral | number;