ABA.get_bank

You're seeing just the function get_bank, go back to ABA module for more information.
Link to this function

get_bank(routing_number)

Specs

get_bank(any()) :: {:ok, ABA.Bank.t()} | {:error, :not_found | :invalid}

Looks up bank info via the routing number passed.

Examples

iex> ABA.get_bank("111900659")
{:ok, %ABA.Bank{routing_number: "111900659", name: "WELLS FARGO BANK",
                       address: "255 2ND AVE SOUTH", city: "MINNEAPOLIS",
                       state: "MN", zip: "55479"}}

iex> ABA.get_bank("111XXX659")
{:error, :invalid}