1 files changed, 31 insertions, 0 deletions
diff --git a/src/main/otTypes.ts b/src/main/otTypes.ts
new file mode 100644
index 0000000..8e9df9f
--- /dev/null
+++ b/src/main/otTypes.ts
@@ -0,0 +1,31 @@
+// OT type definitions for main process (mirror of renderer types)
+
+export interface InsertOp {
+  i: string
+  p: number
+}
+
+export interface DeleteOp {
+  d: string
+  p: number
+}
+
+export interface CommentOp {
+  c: string
+  p: number
+  t: string
+}
+
+export type OtOp = InsertOp | DeleteOp | CommentOp
+
+export function isInsert(op: OtOp): op is InsertOp {
+  return 'i' in op
+}
+
+export function isDelete(op: OtOp): op is DeleteOp {
+  return 'd' in op
+}
+
+export function isComment(op: OtOp): op is CommentOp {
+  return 'c' in op
+}