fix: use per-user dict for _checked_teams to prevent race condition (#116)

Replace single `_checked_team: Optional[Team]` with `_checked_teams: dict[int, Team]`
keyed by `interaction.user.id`. The previous single field was shared across all
concurrent interaction tasks, allowing User B's interaction_check to overwrite
`_checked_team` before User A's button handler read it — crediting the wrong team.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
Cal Corum 2026-03-20 14:01:56 -05:00 committed by cal
parent 2091302b8a
commit 174ce4474d

View File

@ -344,7 +344,7 @@ class TradeAcceptanceView(discord.ui.View):
def __init__(self, builder: TradeBuilder):
super().__init__(timeout=3600.0) # 1 hour timeout
self.builder = builder
self._checked_team: Optional[Team] = None
self._checked_teams: dict[int, Team] = {}
async def _get_user_team(self, interaction: discord.Interaction) -> Optional[Team]:
"""Get the team owned by the interacting user."""
@ -370,7 +370,7 @@ class TradeAcceptanceView(discord.ui.View):
)
return False
self._checked_team = user_team
self._checked_teams[interaction.user.id] = user_team
return True
async def on_timeout(self) -> None:
@ -384,7 +384,7 @@ class TradeAcceptanceView(discord.ui.View):
self, interaction: discord.Interaction, button: discord.ui.Button
):
"""Handle accept button click."""
user_team = self._checked_team
user_team = self._checked_teams.get(interaction.user.id)
if not user_team:
return
@ -419,7 +419,7 @@ class TradeAcceptanceView(discord.ui.View):
self, interaction: discord.Interaction, button: discord.ui.Button
):
"""Handle reject button click - moves trade back to DRAFT."""
user_team = self._checked_team
user_team = self._checked_teams.get(interaction.user.id)
if not user_team:
return