feat: Support providing custom keyring for keystore. (backport cosmos…

…#12453) (cosmos#12489)

CHANGELOG.md

@@ -44,6 +44,10 @@ It is strongly recommended to upgrade to these releases as well.
 
 * (telemetry) [#12405](https://github.com/cosmos/cosmos-sdk/pull/12405) Add _query_ calls metric to telemetry.
 
+### Improvements
+
+* [#12453](https://github.com/cosmos/cosmos-sdk/pull/12453) Add `NewInMemoryWithKeyring` function which allows the creation of in memory `keystore` instances with a specified set of existing items.
+
 ## [v0.46.0-rc2](https://github.com/cosmos/cosmos-sdk/releases/tag/v0.46.0-rc2) - 2022-07-05
 
 ### Features

crypto/keyring/keyring_test.go

@@ -27,6 +27,7 @@ import (
 	"github.com/cosmos/cosmos-sdk/crypto/keys/multisig"
 	"github.com/cosmos/cosmos-sdk/crypto/keys/secp256k1"
 	"github.com/cosmos/cosmos-sdk/crypto/types"
+	cryptotypes "github.com/cosmos/cosmos-sdk/crypto/types"
 	sdk "github.com/cosmos/cosmos-sdk/types"
 	sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
 	"github.com/cosmos/cosmos-sdk/types/tx/signing"
@@ -1069,7 +1070,50 @@ func TestAltKeyring_UnsafeExportPrivKeyHex(t *testing.T) {
 	require.Error(t, err)
 }
 
-func TestNewAccount(t *testing.T) {
+func TestInMemoryWithKeyring(t *testing.T) {
+	priv := cryptotypes.PrivKey(secp256k1.GenPrivKey())
+	pub := priv.PubKey()
+
+	cdc := getCodec()
+	_, err := NewLocalRecord("test record", priv, pub)
+
+	multi := multisig.NewLegacyAminoPubKey(
+		1, []cryptotypes.PubKey{
+			pub,
+		},
+	)
+
+	appName := "test-app"
+
+	legacyMultiInfo, err := NewLegacyMultiInfo(appName, multi)
+	require.NoError(t, err)
+	serializedLegacyMultiInfo := MarshalInfo(legacyMultiInfo)
+
+	kb := NewInMemoryWithKeyring(keyring.NewArrayKeyring([]keyring.Item{
+		{
+			Key:         appName + ".info",
+			Data:        serializedLegacyMultiInfo,
+			Description: "test description",
+		},
+	}), cdc)
+
+	t.Run("key exists", func(t *testing.T) {
+		_, err := kb.Key(appName)
+		require.NoError(t, err)
+	})
+
+	t.Run("key deleted", func(t *testing.T) {
+		err := kb.Delete(appName)
+		require.NoError(t, err)
+
+		t.Run("key is gone", func(t *testing.T) {
+			_, err := kb.Key(appName)
+			require.Error(t, err)
+		})
+	})
+}
+
+func TestInMemoryCreateMultisig(t *testing.T) {
 	cdc := getCodec()
 
 	tests := []struct {