Elixir using Finch to stream Stellar Horizon transaction

.iex.exs

Finch.start_link(name: MyFinch)

url = "https://horizon.stellar.org/accounts/GAFNBDOZBFUKHB4ZY5ANCQ25PM33YLTMWQKW25J7LXNZM3YSHRH3BELY/transactions?limit=200&cursor=119456526699307008&include_failed=true"
Finch.build(:get, url, [{"Accept", "text/event-stream"}]) 
|> Finch.stream(MyFinch, nil, fn
  {:status, status}, _acc ->
    IO.inspect(status)

  {:headers, headers}, _acc ->
    IO.inspect(headers)

  {:data, data}, _acc ->
    [chunk | _]= String.split(data, "\n\n")
    # ["retry: 1000", "event: open", "data: \"hello\""]
    # [id, data]
    # ["retry: 10", "event: close", "data: \"byebye\""]
    case String.split(chunk, "\n", trim: true) do
      ["retry: " <> timeout, "event: " <> event, _data] ->
        IO.inspect("event: #{event}")
      ["id: " <> id, "data: " <> data] ->
        content = Jason.decode!(data)
        %{"paging_token" => cursor} = content

        IO.inspect("id: #{id} - cursor: #{cursor}")
    end
end, receive_timeout: :infinity)