-BEGIN VERIFY SCRIPT-
git grep -l "CBasicKeyStore" | xargs sed -i -e 's/CBasicKeyStore/FillableSigningProvider/g'
-END VERIFY SCRIPT-
https://github.com/bitcoin/bitcoin/pull/16227/commits/d9becff4e13da8e182631baa79b9794c03d44434
Depends on D6555
Partial backport of Core PR16227