Background

When using the estimate fee endpoint in the REST API aka
https://api.lightning.community/rest/#get-v1-transactions-fee

it does not require the AddrToAmount parameter like this GRPC version requires, furthermore when making a request it returns the error "no outputs"

Your environment

• version of lnd
  0.7
• which operating system (uname -a on *Nix)
  Mac OS 10.14.6
• version of btcd, bitcoind, or other backend
  bitcoind 18.1
• any other relevant environment details

Steps to reproduce

Tell us how to reproduce this issue. Please provide stacktraces and links to code in question.
I made a request to the REST api over TOR like so
http://vmsgj6t6t2l542rt3hqacpyqtt5upimhxfefiejkkrjiylblwzmys4id.onion/lnd-rest/btc/v1/transactions/fee?target_conf=2

Expected behaviour

The API should require the AddrToAmount parameter but this is not stated in the documentation

Tell us what should happen

Actual behaviour

AddrToAmount is not required according to the documentation and a "no outputs" error is returned