chore(ecdsa): Replace nested if-match-if's with a single match

[kpop-dfinity]

Replaced

if {
  match  {
    None => if {} else {}
    Some => if {} else {} 
  }
} else {
  match  {
    None => if {} else {}
    Some => if {} else {} 
  }
},

which was hardly readable for me, with one big match

[basvandijk]

@kpop-dfinity you want to make sure that your commit https://github.com/dfinity/ic/pull/180/commits/a81e239b904baf3f512280539b8355b42d4900ec is based of the mirroring branch instead of master. Otherwise your PR will show commits like https://github.com/dfinity/ic/pull/180/commits/cb05b9165b3721f97e5bfc290e95d8d8d6263ea1 which are already in master but not yet in mirroring.

[kpop-dfinity]

@kpop-dfinity you want to make sure that your commit a81e239 is based of the mirroring branch instead of master. Otherwise your PR will show commits like cb05b91 which are already in master but not yet in mirroring.

hmmm, I thought I did, I must have done something wrong

[basvandijk]

One of the failures in the failing "CI Main / Bazel Build All Config Check (pull_request)" job will be fixed by https://github.com/dfinity/ic/pull/188. Not sure yet about the other failures though...

[kpop-dfinity]

One of the failures in the failing "CI Main / Bazel Build All Config Check (pull_request)" job will be fixed by #188. Not sure yet about the other failures though...

Great, thanks for looking into it!