feat: support storing tuples in state

Author: boblat

src/_algopy_testing/arc4.py

@@ -742,12 +742,18 @@ def __repr__(self) -> str:
 
 
 class _DynamicArrayTypeInfo(_TypeInfo):
-    def __init__(self, item_type: _TypeInfo):
+    _subclass_type: Callable[[], type] | None
+
+    def __init__(self, item_type: _TypeInfo, subclass_type: Callable[[], type] | None = None):
+        self._subclass_type = subclass_type
         self.item_type = item_type
 
     @property
     def typ(self) -> type:
-        return _parameterize_type(DynamicArray, self.item_type.typ)
+        if self._subclass_type is not None:
+            return self._subclass_type()
+        else:
+            return _parameterize_type(DynamicArray, self.item_type.typ)
 
     @property
     def arc4_name(self) -> str:
@@ -891,6 +897,10 @@ def __repr__(self) -> str:
 class DynamicBytes(DynamicArray[Byte]):
     """A variable sized array of bytes."""
 
+    _type_info: _DynamicArrayTypeInfo = _DynamicArrayTypeInfo(
+        Byte._type_info, lambda: DynamicBytes
+    )
+
     @typing.overload
     def __init__(self, *values: Byte | UInt8 | int): ...
 
@@ -996,6 +1006,12 @@ def __init__(self, _items: tuple[typing.Unpack[_TTuple]] = (), /):  # type: igno
                     )
         self._value = _encode(items)
 
+    def __bool__(self) -> bool:
+        try:
+            return bool(self.native)
+        except ValueError:
+            return False
+
     def __len__(self) -> int:
         return len(self.native)
 
@@ -1103,6 +1119,8 @@ def _update_backing_value(self) -> None:
     def from_bytes(cls, value: algopy.Bytes | bytes, /) -> typing.Self:
         tuple_type = _tuple_type_from_struct(cls)
         tuple_value = tuple_type.from_bytes(value)
+        if not tuple_value:
+            return typing.cast(typing.Self, tuple_value)
         return cls(*tuple_value.native)
 
     @property

src/_algopy_testing/models/contract.py

@@ -1,6 +1,7 @@
 from __future__ import annotations
 
 import functools
+import inspect
 import typing
 from dataclasses import dataclass
 
@@ -201,12 +202,12 @@ def _get_state_totals(contract: Contract, cls_state_totals: StateTotals) -> _Sta
 
     global_bytes = global_uints = local_bytes = local_uints = 0
     for type_ in get_global_states(contract).values():
-        if issubclass(type_, UInt64 | UInt64Backed | bool):
+        if inspect.isclass(type_) and issubclass(type_, UInt64 | UInt64Backed | bool):
             global_uints += 1
         else:
             global_bytes += 1
     for type_ in get_local_states(contract).values():
-        if issubclass(type_, UInt64 | UInt64Backed | bool):
+        if inspect.isclass(type_) and issubclass(type_, UInt64 | UInt64Backed | bool):
             local_uints += 1
         else:
             local_bytes += 1

src/_algopy_testing/serialize.py

@@ -136,9 +136,16 @@ def native_to_arc4(value: object) -> "_ABIEncoded":
     return arc4_value
 
 
+def compare_type(value_type: type, typ: type) -> bool:
+    if typing.NamedTuple in getattr(typ, "__orig_bases__", []):
+        tuple_fields: Sequence[type] = list(inspect.get_annotations(typ).values())
+        typ = tuple[*tuple_fields]  # type: ignore[valid-type]
+    return value_type == typ
+
+
 def deserialize_from_bytes(typ: type[_T], bites: bytes) -> _T:
     serializer = get_native_to_arc4_serializer(typ)
     arc4_value = serializer.arc4_type.from_bytes(bites)
     native_value = serializer.arc4_to_native(arc4_value)
-    assert isinstance(native_value, typ)
-    return native_value
+    assert compare_type(type_of(native_value), typ) or isinstance(native_value, typ)
+    return native_value  # type: ignore[no-any-return]

src/_algopy_testing/state/box.py

@@ -322,9 +322,9 @@ def get(self, key: _TKey, *, default: _TValue) -> _TValue:
     def maybe(self, key: _TKey) -> tuple[_TValue, bool]:
         key_bytes = self._full_key(key)
         box_exists = lazy_context.ledger.box_exists(self.app_id, key_bytes)
-        if not box_exists:
-            return self._value_type(), False
-        box_content_bytes = lazy_context.ledger.get_box(self.app_id, key_bytes)
+        box_content_bytes = (
+            b"" if not box_exists else lazy_context.ledger.get_box(self.app_id, key_bytes)
+        )
         box_content = cast_from_bytes(self._value_type, box_content_bytes)
         return box_content, box_exists
 

src/_algopy_testing/state/global_state.py

@@ -6,6 +6,7 @@
 from _algopy_testing.context_helpers import lazy_context
 from _algopy_testing.mutable import set_attr_on_mutate
 from _algopy_testing.primitives import Bytes, String
+from _algopy_testing.serialize import type_of
 from _algopy_testing.state.utils import deserialize, serialize
 
 if typing.TYPE_CHECKING:
@@ -49,10 +50,10 @@ def __init__(
         self._key: Bytes | None = None
         self._pending_value: _T | None = None
 
-        if isinstance(type_or_value, type):
-            self.type_: type[_T] = type_or_value
+        if isinstance(type_or_value, type) or isinstance(typing.get_origin(type_or_value), type):
+            self.type_: type[_T] = typing.cast(type[_T], type_or_value)
         else:
-            self.type_ = type(type_or_value)
+            self.type_ = type_of(type_or_value)
             self._pending_value = type_or_value
 
         self.set_key(key)
@@ -123,9 +124,7 @@ def get(self, default: _T | None = None) -> _T:
         try:
             return self.value
         except ValueError:
-            if default is not None:
-                return default
-            return self.type_()
+            return typing.cast(_T, default)
 
     def maybe(self) -> tuple[_T | None, bool]:
         try:

src/_algopy_testing/state/local_state.py

@@ -75,14 +75,14 @@ def get(self, key: algopy.Account | algopy.UInt64 | int, default: _T | None = No
         try:
             return self[account]
         except KeyError:
-            return default if default is not None else self.type_()
+            return typing.cast(_T, default)
 
     def maybe(self, key: algopy.Account | algopy.UInt64 | int) -> tuple[_T, bool]:
         account = _get_account(key)
         try:
             return self[account], True
         except KeyError:
-            return self.type_(), False
+            return typing.cast(_T, None), False
 
 
 # TODO: make a util function along with one used by ops

src/_algopy_testing/state/utils.py

@@ -1,10 +1,15 @@
 from __future__ import annotations
 
+import inspect
 import typing
 
 from _algopy_testing.primitives.bytes import Bytes
 from _algopy_testing.primitives.uint64 import UInt64
 from _algopy_testing.protocols import BytesBacked, Serializable, UInt64Backed
+from _algopy_testing.serialize import (
+    deserialize_from_bytes,
+    serialize_to_bytes,
+)
 
 _TValue = typing.TypeVar("_TValue")
 SerializableValue = int | bytes
@@ -21,12 +26,16 @@ def serialize(value: _TValue) -> SerializableValue:
         return value.bytes.value
     elif isinstance(value, Serializable):
         return value.serialize()
+    elif isinstance(value, tuple):
+        return serialize_to_bytes(value)
     else:
         raise TypeError(f"Unsupported type: {type(value)}")
 
 
 def deserialize(typ: type[_TValue], value: SerializableValue) -> _TValue:
-    if issubclass(typ, bool):
+    if (typing.get_origin(typ) is tuple or issubclass(typ, tuple)) and isinstance(value, bytes):
+        return () if not value else deserialize_from_bytes(typ, value)  # type: ignore[return-value]
+    elif issubclass(typ, bool):
         return value != 0  # type: ignore[return-value]
     elif issubclass(typ, UInt64 | Bytes):
         return typ(value)  # type: ignore[arg-type, return-value]
@@ -55,7 +64,7 @@ def cast_from_bytes(typ: type[_TValue], value: bytes) -> _TValue:
     """
     from _algopy_testing.utils import as_int64
 
-    if issubclass(typ, bool | UInt64Backed | UInt64):
+    if inspect.isclass(typ) and issubclass(typ, bool | UInt64Backed | UInt64):
         if len(value) > 8:
             raise ValueError("uint64 value too big")
         serialized: SerializableValue = int.from_bytes(value)