Mike Gerwitz

Activist for User Freedom

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Diffstat (limited to 'src/types/misc.d.ts')
-rw-r--r--src/types/misc.d.ts10
1 files changed, 10 insertions, 0 deletions
diff --git a/src/types/misc.d.ts b/src/types/misc.d.ts
index 6560f2b..83b11b5 100644
--- a/src/types/misc.d.ts
+++ b/src/types/misc.d.ts
@@ -44,3 +44,13 @@ type NominalType<K, T> = K & { __nominal_type__: T };
* Number of seconds since the Unix epoch (1970-01-01 UTC).
*/
type UnixTimestamp = NominalType<number, 'UnixTimestamp'>;
+
+
+/**
+ * Oldschool NodeJS callback
+ *
+ * We should migrate to promises over time. The purpose of this type is to
+ * reduce the boilerplate of these function definitions, and to clearly
+ * document that this pattern is something that used to be done frequently.
+ */
+type NodeCallback<T, R = void> = ( e: Error | null, result: T | null ) => R;