feat: load canister snaptots

packages/ic-management/README.md

@@ -75,6 +75,7 @@ const { status, memory_size, ...rest } = await canisterStatus(YOUR_CANISTER_ID);
 - [fetchCanisterLogs](#gear-fetchcanisterlogs)
 - [takeCanisterSnapshot](#gear-takecanistersnapshot)
 - [listCanisterSnapshots](#gear-listcanistersnapshots)
+- [loadCanisterSnapshot](#gear-loadcanistersnapshot)
 
 ##### :gear: create
 
@@ -280,6 +281,23 @@ Parameters:
 
 [:link: Source](https://github.com/dfinity/ic-js/tree/main/packages/ic-management/src/ic-management.canister.ts#L405)
 
+##### :gear: loadCanisterSnapshot
+
+Loads a snapshot of a canister's state.
+
+| Method                 | Type                                                                                                                                                                                |
+| ---------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
+| `loadCanisterSnapshot` | `({ canisterId, snapshotId, senderCanisterVersion, }: { canisterId: Principal; snapshotId: string or snapshot_id; senderCanisterVersion?: bigint or undefined; }) => Promise<void>` |
+
+Parameters:
+
+- `params`: - Parameters for the snapshot loading operation.
+- `params.canisterId`: - The ID of the canister for which the snapshot will be loaded.
+- `params.snapshotId`: - The ID of the snapshot to load.
+- `params.senderCanisterVersion`: - The optional sender canister version. If provided, its value must be equal to ic0.canister_version.
+
+[:link: Source](https://github.com/dfinity/ic-js/tree/main/packages/ic-management/src/ic-management.canister.ts#L431)
+
 <!-- TSDOC_END -->
 
 ## Resources

packages/ic-management/src/ic-management.canister.spec.ts

@@ -872,4 +872,83 @@ describe("ICManagementCanister", () => {
       await expect(call).rejects.toThrow(error);
     });
   });
+
+  describe("loadCanisterSnapshot", () => {
+    it("should call load_canister_snapshot with Uint8Array snapshotId", async () => {
+      const service = mock<IcManagementService>();
+      service.load_canister_snapshot.mockResolvedValue(undefined);
+
+      const icManagement = await createICManagement(service);
+
+      const params = {
+        canisterId: mockCanisterId,
+        snapshotId: Uint8Array.from([1, 2, 3, 4]),
+      };
+
+      await icManagement.loadCanisterSnapshot(params);
+
+      expect(service.load_canister_snapshot).toHaveBeenCalledWith({
+        canister_id: params.canisterId,
+        snapshot_id: params.snapshotId,
+        sender_canister_version: [],
+      });
+    });
+
+    it("should call load_canister_snapshot with string snapshotId", async () => {
+      const service = mock<IcManagementService>();
+      service.load_canister_snapshot.mockResolvedValue(undefined);
+
+      const icManagement = await createICManagement(service);
+
+      const params = {
+        canisterId: mockCanisterId,
+        snapshotId: "000000000000000201010000000000000001",
+      };
+
+      await icManagement.loadCanisterSnapshot(params);
+
+      expect(service.load_canister_snapshot).toHaveBeenCalledWith({
+        canister_id: params.canisterId,
+        snapshot_id: decodeSnapshotId(params.snapshotId),
+        sender_canister_version: [],
+      });
+    });
+
+    it("should call load_canister_snapshot with senderCanisterVersion", async () => {
+      const service = mock<IcManagementService>();
+      service.load_canister_snapshot.mockResolvedValue(undefined);
+
+      const icManagement = await createICManagement(service);
+
+      const params = {
+        canisterId: mockCanisterId,
+        snapshotId: Uint8Array.from([1, 2, 3, 4]),
+        senderCanisterVersion: 5n,
+      };
+
+      await icManagement.loadCanisterSnapshot(params);
+
+      expect(service.load_canister_snapshot).toHaveBeenCalledWith({
+        canister_id: params.canisterId,
+        snapshot_id: params.snapshotId,
+        sender_canister_version: [params.senderCanisterVersion],
+      });
+    });
+
+    it("should throw an Error if load_canister_snapshot fails", async () => {
+      const error = new Error("Test");
+      const service = mock<IcManagementService>();
+      service.load_canister_snapshot.mockRejectedValue(error);
+
+      const icManagement = await createICManagement(service);
+
+      const call = () =>
+        icManagement.loadCanisterSnapshot({
+          canisterId: mockCanisterId,
+          snapshotId: Uint8Array.from([1, 2, 3, 4]),
+        });
+
+      await expect(call).rejects.toThrow(error);
+    });
+  });
 });

packages/ic-management/src/ic-management.canister.ts

@@ -413,4 +413,36 @@ export class ICManagementCanister {
       canister_id: canisterId,
     });
   };
+
+  /**
+   * Loads a snapshot of a canister's state.
+   *
+   * @link https://internetcomputer.org/docs/current/references/ic-interface-spec#ic-load_canister_snapshot
+   *
+   * @param {Object} params - Parameters for the snapshot loading operation.
+   * @param {Principal} params.canisterId - The ID of the canister for which the snapshot will be loaded.
+   * @param {snapshot_id} params.snapshotId - The ID of the snapshot to load.
+   * @param {BigInt} [params.senderCanisterVersion] - The optional sender canister version. If provided, its value must be equal to ic0.canister_version.
+   *
+   * @returns {Promise<void>} A promise that resolves when the snapshot is successfully loaded.
+   *
+   * @throws {Error} If the snapshot loading operation fails.
+   */
+  loadCanisterSnapshot = async ({
+    canisterId,
+    snapshotId,
+    senderCanisterVersion,
+  }: {
+    canisterId: Principal;
+    snapshotId: SnapshotIdText | snapshot_id;
+    senderCanisterVersion?: bigint;
+  }): Promise<void> => {
+    const { load_canister_snapshot } = this.service;
+
+    await load_canister_snapshot({
+      canister_id: canisterId,
+      snapshot_id: mapSnapshotId(snapshotId),
+      sender_canister_version: toNullable(senderCanisterVersion),
+    });
+  };
 }