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backend/alembic/versions/20260404_0008_payments.py

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+"""payment fields and webhook idempotency
+
+Revision ID: 20260404_0008
+Revises: 20260404_0007
+"""
+
+from typing import Sequence, Union
+
+import sqlalchemy as sa
+from alembic import op
+
+revision: str = "20260404_0008"
+down_revision: Union[str, None] = "20260404_0007"
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    op.alter_column(
+        "orders",
+        "payment_reference",
+        existing_type=sa.String(length=64),
+        type_=sa.String(length=128),
+        existing_nullable=True,
+    )
+    op.add_column("orders", sa.Column("provider_order_id", sa.String(length=64), nullable=True))
+    op.add_column("orders", sa.Column("provider_payment_id", sa.String(length=64), nullable=True))
+    op.add_column("orders", sa.Column("idempotency_key", sa.String(length=64), nullable=True))
+    op.add_column("orders", sa.Column("expires_at", sa.DateTime(timezone=True), nullable=True))
+    op.create_index(op.f("ix_orders_provider_order_id"), "orders", ["provider_order_id"], unique=True)
+    op.create_index(op.f("ix_orders_provider_payment_id"), "orders", ["provider_payment_id"], unique=False)
+    op.create_index(op.f("ix_orders_idempotency_key"), "orders", ["idempotency_key"], unique=True)
+    op.create_index(op.f("ix_orders_expires_at"), "orders", ["expires_at"], unique=False)
+
+    op.create_table(
+        "payment_webhook_events",
+        sa.Column("id", sa.Integer(), nullable=False),
+        sa.Column("provider", sa.String(length=32), nullable=False),
+        sa.Column("provider_event_id", sa.String(length=128), nullable=False),
+        sa.Column("event_type", sa.String(length=64), nullable=False),
+        sa.Column("payload", sa.Text(), nullable=False),
+        sa.Column("processed_at", sa.DateTime(timezone=True), server_default=sa.text("now()"), nullable=False),
+        sa.PrimaryKeyConstraint("id"),
+        sa.UniqueConstraint("provider_event_id"),
+    )
+    op.create_index(op.f("ix_payment_webhook_events_provider"), "payment_webhook_events", ["provider"], unique=False)
+    op.create_index(
+        op.f("ix_payment_webhook_events_provider_event_id"),
+        "payment_webhook_events",
+        ["provider_event_id"],
+        unique=True,
+    )
+
+
+def downgrade() -> None:
+    op.drop_index(op.f("ix_payment_webhook_events_provider_event_id"), table_name="payment_webhook_events")
+    op.drop_index(op.f("ix_payment_webhook_events_provider"), table_name="payment_webhook_events")
+    op.drop_table("payment_webhook_events")
+    op.drop_index(op.f("ix_orders_expires_at"), table_name="orders")
+    op.drop_index(op.f("ix_orders_idempotency_key"), table_name="orders")
+    op.drop_index(op.f("ix_orders_provider_payment_id"), table_name="orders")
+    op.drop_index(op.f("ix_orders_provider_order_id"), table_name="orders")
+    op.drop_column("orders", "expires_at")
+    op.drop_column("orders", "idempotency_key")
+    op.drop_column("orders", "provider_payment_id")
+    op.drop_column("orders", "provider_order_id")
+    op.alter_column(
+        "orders",
+        "payment_reference",
+        existing_type=sa.String(length=128),
+        type_=sa.String(length=64),
+        existing_nullable=True,
+    )