fix: In Keybase GetByAddress, change generic error to NewErrKeyNotFou…

…nd (gnolang#1316)

The Keybase method `GetByName` [returns the specific
error](https://github.com/gnolang/gno/blob/199cd29584d44812a0aec3606bbff37a320c609a/tm2/pkg/crypto/keys/keybase.go#L184)
`ErrKeyNotFound` if the key is not found. This is very nice because the
GnoMobile API wraps this with a gRPC function and we use
`keyerror.IsErrKeyNotFound` to check the error type and convert it to
the gRPC equivalent. But the Keybase method `GetByAddress` just [returns
a generic
error](https://github.com/gnolang/gno/blob/199cd29584d44812a0aec3606bbff37a320c609a/tm2/pkg/crypto/keys/keybase.go#L192)
if the key isn't found. (I assume that it is not intentional to restrict
this to a generic error.) This means that the gRPC interface must search
the error string for "not found", which is unreliable. We would prefer
to use `keyerror.IsErrKeyNotFound`. Furthermore, `GetByNameOrAddress`
[can return an error from
either](https://github.com/gnolang/gno/blob/199cd29584d44812a0aec3606bbff37a320c609a/tm2/pkg/crypto/keys/keybase.go#L175-L177)
`GetByName` or `GetByAddress`. It is preferable to return just one error
type for key not found.

This pull request updates `GetByAddress` to use
`keyerror.NewErrKeyNotFound` with the same error message.

<details><summary>Contributors' checklist...</summary>

- [x] Added new tests, or not needed, or not feasible
- [x] Provided an example (e.g. screenshot) to aid review or the PR is
self-explanatory
- [x] Updated the official documentation or not needed
- [x] No breaking changes were made, or a `BREAKING CHANGE: xxx` message
was included in the description
- [ ] Added references to related issues and PRs
- [ ] Provided any useful hints for running manual tests
- [ ] Added new benchmarks to [generated
graphs](https://gnoland.github.io/benchmarks), if any. More info
[here](https://github.com/gnolang/gno/blob/master/.benchmarks/README.md).
</details>

Signed-off-by: Jeff Thompson <[email protected]>

tm2/pkg/crypto/keys/keybase.go

@@ -181,7 +181,7 @@ func (kb dbKeybase) GetByName(name string) (Info, error) {
 func (kb dbKeybase) GetByAddress(address crypto.Address) (Info, error) {
 	ik := kb.db.Get(addrKey(address))
 	if len(ik) == 0 {
-		return nil, fmt.Errorf("key with address %s not found", address)
+		return nil, keyerror.NewErrKeyNotFound(fmt.Sprintf("key with address %s not found", address))
 	}
 	bs := kb.db.Get(ik)
 	return readInfo(bs)

tm2/pkg/crypto/keys/keybase_test.go

@@ -9,6 +9,7 @@ import (
 
 	"github.com/gnolang/gno/tm2/pkg/crypto"
 	"github.com/gnolang/gno/tm2/pkg/crypto/ed25519"
+	"github.com/gnolang/gno/tm2/pkg/crypto/keys/keyerror"
 )
 
 func TestCreateAccountInvalidMnemonic(t *testing.T) {
@@ -107,6 +108,7 @@ func TestKeyManagement(t *testing.T) {
 	require.NoError(t, err)
 	_, err = cstore.GetByAddress(addr)
 	require.NotNil(t, err)
+	require.True(t, keyerror.IsErrKeyNotFound(err))
 
 	// list shows them in order
 	keyS, err := cstore.List()