msggen: Expose extratlvs of keysend

[cdecker]

It's a bit special in the sense that it is a composite whose keys are numbers and not enumerated (they're custom types).

[dennisreimann]

I'm trying to pass in the extratlv with a payload like the following, but get an "invalid payload" result:

{
  "id": 0,
  "jsonrpc": "2.0",
  "method": "keysend",
  "params": [
    "02ef9c3b0c78257428a3eb0087bb88d64708aba5f0528a330df53efa70d43fbc42",
    21000,
    null,
    null,
    null,
    null,
    null,
    {
      "696969": "313233343536",
      "112111100": "77616c5f6872444873305242454d353736",
      "5482373484": "4055d3893ec48d1a42453a34a7d7b338296edd82219945621bb2580996c9149a"
    }
  ]
}

Without the extratlv data it works, so I know that the destination accepts keysend payments in general.

What am I missing or doing wrong?

[cdecker]

This seems mostly unrelated to msggen. You can switch to key=value mode on the command line by adding the -k switch, and then you can skip the nulls which are required in positional mode.

[dennisreimann]

Got it done, thanks! Turns out 5482373484 shouldn't be part of the payload.