I’m trying to call this motoko function from my frontend (users is a previously declared HashMap):
public func storeid(proton_account : Text, ic_id : Text) : async Text { users.put(proton_account, ic_id); let numusers = users.size(); return ic_id # " and " # proton_account # ", number of users = " # Nat.toText(numusers); };
The Javascript console reports:
Uncaught (in promise) Error: Impossible to convert undefined to Principal.
at Function.from (index.js:29)
at caller (actor.js:171)
at CanisterActor.handler [as storeid] (actor.js:195)
at HTMLButtonElement.ic_storeid (App.svelte:136)
It doesn’t seem to matter what parameters I call the function with. I can even hardcode 2 strings in the call e.g. const dfinity_result = await cronacle_frontend.storeid(“abc”, “def”) - I still get the same error.
There is nothing in my code that refers to the Principal type. Does anyone know what might be generating this error?