How to write a String to a fifo?

[insanity54]

I would like to write a string of text to a fifo. Here is what I've tried.

First, I made a fifo using mkfifo.

$ mkfifo /tmp/adder.fifo

Next, I made a typescript which builds on this example from the docs.

// fifo-helper.ts
async function main() {
  const file = Bun.file("/tmp/adder.fifo")
  const writer = file.writer();
  writer.write("testing 123\n");
  writer.end()
}

main()

When I run the script, I get an error.

1 | // fifo-helper.ts
2 | 
3 | async function main() {
4 |   const file = Bun.file("/tmp/adder.fifo")
5 |   const writer = file.writer();
                          ^
ENXIO: no such device or address, open
 syscall: "open",
   errno: -6,
    code: "ENXIO"

      at <anonymous> (/home/insanity54/services/ot-helper/fifo-helper.ts:5:23)
      at main (/home/insanity54/services/ot-helper/fifo-helper.ts:3:20)
      at /home/insanity54/services/ot-helper/fifo-helper.ts:11:1

Bun v1.2.2 (Linux x64)

Is there something I'm doing wrong?