initial implementation for load_liquid volume-tracking

api/src/opentrons/protocol_engine/commands/load_liquid.py

@@ -3,6 +3,7 @@
 from pydantic import BaseModel, Field
 from typing import Optional, Type, Dict, TYPE_CHECKING
 from typing_extensions import Literal
+from datetime import datetime
 
 from .command import AbstractCommandImpl, BaseCommand, BaseCommandCreate, SuccessData
 from ..errors.error_occurrence import ErrorOccurrence
@@ -53,6 +54,19 @@ async def execute(
         self._state_view.labware.validate_liquid_allowed_in_labware(
             labware_id=params.labwareId, wells=params.volumeByWell
         )
+        # do this in WellStore?!
+        labware_id = params.labwareId
+        well_name = next(iter(params.volumeByWell))
+        volume = next(iter(params.volumeByWell.values()))
+        height = self._state_view.geometry.get_well_height_at_volume(
+            labware_id=labware_id, well_name=well_name, volume=volume
+        )
+        self._state_view.wells.set_liquid_height(
+            labware_id=labware_id,
+            well_name=well_name,
+            height=height,
+            time=datetime.now(),
+        )
 
         return SuccessData(public=LoadLiquidResult(), private=None)
 

api/src/opentrons/protocol_engine/state/geometry.py

@@ -1445,6 +1445,15 @@ def get_well_height_after_volume(
             target_volume=final_volume, well_geometry=well_geometry
         )
 
+    def get_well_height_at_volume(
+        self, labware_id: str, well_name: str, volume: float
+    ) -> float:
+        """Convert well volume to height."""
+        well_geometry = self._labware.get_well_geometry(labware_id, well_name)
+        return find_height_at_well_volume(
+            target_volume=volume, well_geometry=well_geometry
+        )
+
     def validate_dispense_volume_into_well(
         self,
         labware_id: str,

api/src/opentrons/protocol_engine/state/wells.py

@@ -127,3 +127,12 @@ def has_measured_liquid_height(self, labware_id: str, well_name: str) -> bool:
             )
         except KeyError:
             return False
+
+    def set_liquid_height(
+        self, labware_id: str, well_name: str, height: float, time: datetime
+    ) -> None:
+        """Set the liquid height of the well."""
+        lhi = LiquidHeightInfo(height=height, last_measured=time)
+        if labware_id not in self._state.measured_liquid_heights:
+            self._state.measured_liquid_heights[labware_id] = {}
+        self._state.measured_liquid_heights[labware_id][well_name] = lhi