Returns a specification to start this module under a supervisor.

See Supervisor.

@spec clear() :: :ok

Clears all transfers from the store (all namespaces).

Serialized write - goes through GenServer.

Useful for test cleanup. Note: This clears ALL data, not just the current namespace. For namespace-specific cleanup, use clear_namespace/1.

@spec clear_namespace(pid() | :global | {pid() | :global, String.t()}) :: :ok

Clears all transfers for a specific namespace.

Used by PaperTiger.Test to clean up after each test.

@spec count() :: non_neg_integer()

Counts total transfers in current namespace.

Direct ETS access - does not go through GenServer.

@spec delete(String.t()) :: :ok

Deletes a transfer from the store.

Serialized write - goes through GenServer. Data is scoped to the current test namespace.

@spec find_by(atom(), term()) :: [map()]

Finds all transfers in the current namespace whose field equals value.

Direct ETS access - does not go through GenServer. Returns an empty list when value is nil, since a nil reference never identifies a parent resource.

Examples

find_by(:customer, "cus_123")
find_by(:status, "active")

@spec get(String.t()) :: {:ok, map()} | {:error, :not_found}

Retrieves a transfer by ID.

Direct ETS access - does not go through GenServer. Data is scoped to the current test namespace.

@spec get_owned(String.t(), atom(), term()) :: {:ok, map()} | {:error, :not_found}

Retrieves a transfer only when it belongs to the given owner.

Missing resources and resources owned by a different parent both return {:error, :not_found} so nested endpoints do not disclose foreign IDs.

@spec insert(map()) :: {:ok, map()}

Inserts a transfer into the store.

Serialized write - goes through GenServer to prevent race conditions. Data is scoped to the current test namespace.

@spec list(keyword() | map()) :: PaperTiger.List.t()

Lists all transfers with optional pagination.

Direct ETS access - does not go through GenServer. Data is scoped to the current test namespace.

Options

• :limit - Number of items (default: 10, max: 100)
• :starting_after - Cursor for pagination
• :ending_before - Reverse cursor

@spec list_namespace(pid() | :global | {pid() | :global, String.t()}) :: [map()]

Returns all items in a specific namespace.

Useful for debugging test isolation.

@spec mutate_owned(atom(), term(), [
  {:insert | :update, map()} | {:delete, String.t()}
]) ::
  :ok
  | {:error,
     {:already_exists | :duplicate_operation | :not_found | :not_owned,
      String.t()}}

Validates and applies child-resource mutations in one serialized store call.

Every operation is checked before any write occurs. Inserts must use new IDs, updates and deletes must target existing resources owned by owner_id, and an ID may appear only once in the batch.

@spec namespaces() :: [PaperTiger.Connect.storage_namespace()]

Lists every storage namespace that currently holds transfers.

Direct ETS access - does not go through GenServer.

@spec prefix() :: String.t() | nil

Returns the ID prefix for this resource.

@spec start_link(keyword()) :: GenServer.on_start()

Starts the transfer store GenServer.

@spec table_name() :: atom()

Returns the ETS table name for this store.

@spec update(map()) :: {:ok, map()}

Updates a transfer in the store.

Serialized write - goes through GenServer. Data is scoped to the current test namespace.