6 files changed, 46 insertions, 5 deletions

diff --git a/packages/shared/src/contextBridge/SophieRenderer.ts b/packages/shared/src/contextBridge/SophieRenderer.ts
index 91a0a3c..c878595 100644
--- a/packages/shared/src/contextBridge/SophieRenderer.ts
+++ b/packages/shared/src/contextBridge/SophieRenderer.ts
@@ -1,3 +1,7 @@
+import { SharedStoreListener } from '../stores/SharedStore';
+
 export interface SophieRenderer {
-  buttonClicked(): void;
+  setSharedStoreListener(listener: SharedStoreListener): void;
+
+  buttonClick(): void;
 }
diff --git a/packages/shared/src/index.ts b/packages/shared/src/index.ts
index f95675d..7f192bd 100644
--- a/packages/shared/src/index.ts
+++ b/packages/shared/src/index.ts
@@ -1,3 +1,12 @@
 export type { SophieRenderer } from './contextBridge/SophieRenderer';
 
-export { RendererIpcMessage } from './ipc/RendererIpcMessage';
+export { MainToRendererIpcMessage } from './ipc/MainToRendererIpcMessage';
+export { RendererToMainIpcMessage } from './ipc/RendererToMainIpcMessage';
+
+export type {
+  SharedStore,
+  SharedStoreListener,
+  SharedStoreSnapshotIn,
+  SharedStoreSnapshotOut,
+} from './stores/SharedStore';
+export { sharedStore } from './stores/SharedStore';
diff --git a/packages/shared/src/ipc/MainToRendererIpcMessage.ts b/packages/shared/src/ipc/MainToRendererIpcMessage.ts
new file mode 100644
index 0000000..2ddca80
--- /dev/null
+++ b/packages/shared/src/ipc/MainToRendererIpcMessage.ts
@@ -0,0 +1,4 @@
+export enum MainToRendererIpcMessage {
+  SharedStoreSnapshot = "sophie-shared-store-snapshot",
+  SharedStorePatch = "sophie-shared-store-patch",
+}
diff --git a/packages/shared/src/ipc/RendererIpcMessage.ts b/packages/shared/src/ipc/RendererIpcMessage.ts
deleted file mode 100644
index cfb87ae..0000000
--- a/packages/shared/src/ipc/RendererIpcMessage.ts
+++ /dev/null
@@ -1,3 +0,0 @@
-export enum RendererIpcMessage {
-  ButtonClicked = "button-clicked"
-}
diff --git a/packages/shared/src/ipc/RendererToMainIpcMessage.ts b/packages/shared/src/ipc/RendererToMainIpcMessage.ts
new file mode 100644
index 0000000..c4c682d
--- /dev/null
+++ b/packages/shared/src/ipc/RendererToMainIpcMessage.ts
@@ -0,0 +1,4 @@
+export enum RendererToMainIpcMessage {
+  SharedStoreSnapshotRequest = "sophie-shared-store-snapshot-request",
+  ButtonClick = "sophie-button-click"
+}
diff --git a/packages/shared/src/stores/SharedStore.ts b/packages/shared/src/stores/SharedStore.ts
new file mode 100644
index 0000000..8933bca
--- /dev/null
+++ b/packages/shared/src/stores/SharedStore.ts
@@ -0,0 +1,23 @@
+import {
+  IJsonPatch,
+  Instance,
+  types,
+  SnapshotIn,
+  SnapshotOut,
+} from 'mobx-state-tree';
+
+export const sharedStore = types.model("SharedStore", {
+  clickCount: 0
+});
+
+export interface SharedStore extends Instance<typeof sharedStore> {}
+
+export interface SharedStoreSnapshotIn extends SnapshotIn<typeof sharedStore> {}
+
+export interface SharedStoreSnapshotOut extends SnapshotOut<typeof sharedStore> {}
+
+export interface SharedStoreListener {
+  onSnapshot(snapshot: SharedStoreSnapshotIn): void;
+
+  onPatch(patch: IJsonPatch): void;
+}