refactor: x/evidence audit changes (#14092)

## Description

ref: #14063 



---

### Author Checklist

*All items are required. Please add a note to the item if the item is not applicable and
please add links to any relevant follow up issues.*

I have...

- [ ] included the correct [type prefix](https://github.com/commitizen/conventional-commit-types/blob/v3.0.0/index.json) in the PR title
- [ ] added `!` to the type prefix if API or client breaking change
- [ ] targeted the correct branch (see [PR Targeting](https://github.com/cosmos/cosmos-sdk/blob/main/CONTRIBUTING.md#pr-targeting))
- [ ] provided a link to the relevant issue or specification
- [ ] followed the guidelines for [building modules](https://github.com/cosmos/cosmos-sdk/blob/main/docs/docs/building-modules)
- [ ] included the necessary unit and integration [tests](https://github.com/cosmos/cosmos-sdk/blob/main/CONTRIBUTING.md#testing)
- [ ] added a changelog entry to `CHANGELOG.md`
- [ ] included comments for [documenting Go code](https://blog.golang.org/godoc)
- [ ] updated the relevant documentation or specification
- [ ] reviewed "Files changed" and left comments if necessary
- [ ] confirmed all CI checks have passed

### Reviewers Checklist

*All items are required. Please add a note if the item is not applicable and please add
your handle next to the items reviewed if you only reviewed selected items.*

I have...

- [ ] confirmed the correct [type prefix](https://github.com/commitizen/conventional-commit-types/blob/v3.0.0/index.json) in the PR title
- [ ] confirmed `!` in the type prefix if API or client breaking change
- [ ] confirmed all author checklist items have been addressed 
- [ ] reviewed state machine logic
- [ ] reviewed API design and naming
- [ ] reviewed documentation is accurate
- [ ] reviewed tests and test coverage
- [ ] manually tested (if applicable)

proto/cosmos/evidence/v1beta1/evidence.proto

@@ -16,9 +16,16 @@ message Equivocation {
   option (gogoproto.goproto_getters) = false;
   option (gogoproto.equal)           = false;
 
+  // height is the equivocation height.
   int64                     height = 1;
+
+  // time is the equivocation time.
   google.protobuf.Timestamp time   = 2
       [(gogoproto.nullable) = false, (amino.dont_omitempty) = true, (gogoproto.stdtime) = true];
+
+  // power is the equivocation validator power.
   int64  power             = 3;
+
+  // consensus_address is the equivocation validator consensus address.
   string consensus_address = 4 [(cosmos_proto.scalar) = "cosmos.AddressString"];
 }

proto/cosmos/evidence/v1beta1/tx.proto

@@ -28,7 +28,10 @@ message MsgSubmitEvidence {
   option (gogoproto.equal)           = false;
   option (gogoproto.goproto_getters) = false;
 
+  // submitter is the signer account address of evidence.
   string              submitter = 1 [(cosmos_proto.scalar) = "cosmos.AddressString"];
+
+  // evidence defines the evidence of misbehavior.
   google.protobuf.Any evidence  = 2 [(cosmos_proto.accepts_interface) = "Evidence"];
 }
 

x/evidence/client/cli/query.go

@@ -62,6 +62,7 @@ func QueryEvidenceCmd() func(*cobra.Command, []string) error {
 	}
 }
 
+// queryEvidence queries for a single evidence by the given hash.
 func queryEvidence(clientCtx client.Context, hash string) error {
 	queryClient := types.NewQueryClient(clientCtx)
 
@@ -74,6 +75,7 @@ func queryEvidence(clientCtx client.Context, hash string) error {
 	return clientCtx.PrintProto(res.Evidence)
 }
 
+// queryAllEvidence returns all evidences.
 func queryAllEvidence(clientCtx client.Context, pageReq *query.PageRequest) error {
 	queryClient := types.NewQueryClient(clientCtx)
 

x/evidence/client/evidence_handler.go

@@ -12,6 +12,7 @@ type (
 	}
 )
 
+// NewEvidenceHandler returns an EvidenceHandler.
 func NewEvidenceHandler(cliHandler CLIHandlerFn) EvidenceHandler {
 	return EvidenceHandler{
 		CLIHandler: cliHandler,

x/evidence/keeper/grpc_query_test.go

@@ -2,6 +2,7 @@ package keeper_test
 
 import (
 	"fmt"
+	"strings"
 
 	"github.com/cosmos/cosmos-sdk/types/query"
 	"github.com/cosmos/cosmos-sdk/x/evidence/exported"
@@ -18,23 +19,31 @@ func (suite *KeeperTestSuite) TestQueryEvidence() {
 		msg       string
 		malleate  func()
 		expPass   bool
+		expErrMsg string
 		posttests func(res *types.QueryEvidenceResponse)
 	}{
 		{
-			"empty request",
+			"invalid request with empty evidence hash",
 			func() {
-				req = &types.QueryEvidenceRequest{}
+				req = &types.QueryEvidenceRequest{Hash: ""}
 			},
 			false,
+			"invalid request; hash is empty",
 			func(res *types.QueryEvidenceResponse) {},
 		},
 		{
-			"invalid request with empty evidence hash",
+			"evidence not found",
 			func() {
-				req = &types.QueryEvidenceRequest{Hash: ""}
+				numEvidence := 1
+				evidence = suite.populateEvidence(suite.ctx, numEvidence)
+				evidenceHash := evidence[0].Hash().String()
+				reqHash := strings.Repeat("a", len(evidenceHash))
+				req = types.NewQueryEvidenceRequest(reqHash)
 			},
 			false,
-			func(res *types.QueryEvidenceResponse) {},
+			"not found",
+			func(res *types.QueryEvidenceResponse) {
+			},
 		},
 		{
 			"success",
@@ -44,6 +53,7 @@ func (suite *KeeperTestSuite) TestQueryEvidence() {
 				req = types.NewQueryEvidenceRequest(evidence[0].Hash().String())
 			},
 			true,
+			"",
 			func(res *types.QueryEvidenceResponse) {
 				var evi exported.Evidence
 				err := suite.encCfg.InterfaceRegistry.UnpackAny(res.Evidence, &evi)
@@ -66,6 +76,7 @@ func (suite *KeeperTestSuite) TestQueryEvidence() {
 				suite.Require().NotNil(res)
 			} else {
 				suite.Require().Error(err)
+				suite.Require().Contains(err.Error(), tc.expErrMsg)
 				suite.Require().Nil(res)
 			}
 

x/evidence/keeper/infraction_test.go

@@ -3,6 +3,10 @@ package keeper_test
 import (
 	"time"
 
+	"github.com/stretchr/testify/require"
+	"github.com/stretchr/testify/suite"
+	tmproto "github.com/tendermint/tendermint/proto/tendermint/types"
+
 	codectypes "github.com/cosmos/cosmos-sdk/codec/types"
 	"github.com/cosmos/cosmos-sdk/runtime"
 	simtestutil "github.com/cosmos/cosmos-sdk/testutil/sims"
@@ -17,9 +21,6 @@ import (
 	"github.com/cosmos/cosmos-sdk/x/staking"
 	stakingkeeper "github.com/cosmos/cosmos-sdk/x/staking/keeper"
 	stakingtestutil "github.com/cosmos/cosmos-sdk/x/staking/testutil"
-	"github.com/stretchr/testify/require"
-	"github.com/stretchr/testify/suite"
-	tmproto "github.com/tendermint/tendermint/proto/tendermint/types"
 )
 
 type InfractionTestSuite struct {

x/evidence/keeper/keeper.go

@@ -26,6 +26,7 @@ type Keeper struct {
 	slashingKeeper types.SlashingKeeper
 }
 
+// NewKeeper creates a new Keeper object.
 func NewKeeper(
 	cdc codec.BinaryCodec, storeKey storetypes.StoreKey, stakingKeeper types.StakingKeeper,
 	slashingKeeper types.SlashingKeeper,

x/evidence/keeper/keeper_test.go

@@ -5,21 +5,21 @@ import (
 	"fmt"
 	"time"
 
-	"github.com/cosmos/cosmos-sdk/testutil"
-	moduletestutil "github.com/cosmos/cosmos-sdk/types/module/testutil"
-	"github.com/cosmos/cosmos-sdk/x/evidence"
-	evidencetestutil "github.com/cosmos/cosmos-sdk/x/evidence/testutil"
 	"github.com/golang/mock/gomock"
+	"github.com/stretchr/testify/suite"
 	tmproto "github.com/tendermint/tendermint/proto/tendermint/types"
 
 	"github.com/cosmos/cosmos-sdk/baseapp"
 	"github.com/cosmos/cosmos-sdk/crypto/keys/ed25519"
 	cryptotypes "github.com/cosmos/cosmos-sdk/crypto/types"
+	"github.com/cosmos/cosmos-sdk/testutil"
 	sdk "github.com/cosmos/cosmos-sdk/types"
+	moduletestutil "github.com/cosmos/cosmos-sdk/types/module/testutil"
+	"github.com/cosmos/cosmos-sdk/x/evidence"
 	"github.com/cosmos/cosmos-sdk/x/evidence/exported"
 	"github.com/cosmos/cosmos-sdk/x/evidence/keeper"
+	evidencetestutil "github.com/cosmos/cosmos-sdk/x/evidence/testutil"
 	"github.com/cosmos/cosmos-sdk/x/evidence/types"
-	"github.com/stretchr/testify/suite"
 )
 
 var (
@@ -81,14 +81,15 @@ type KeeperTestSuite struct {
 	stakingKeeper  *evidencetestutil.MockStakingKeeper
 	queryClient    types.QueryClient
 	encCfg         moduletestutil.TestEncodingConfig
+	msgServer      types.MsgServer
 }
 
 func (suite *KeeperTestSuite) SetupTest() {
 	encCfg := moduletestutil.MakeTestEncodingConfig(evidence.AppModuleBasic{})
 	key := sdk.NewKVStoreKey(types.StoreKey)
 	tkey := sdk.NewTransientStoreKey("evidence_transient_store")
-	testCtx := testutil.DefaultContext(key, tkey)
-	suite.ctx = testCtx
+	testCtx := testutil.DefaultContextWithDB(suite.T(), key, tkey)
+	suite.ctx = testCtx.Ctx
 
 	ctrl := gomock.NewController(suite.T())
 
@@ -111,7 +112,8 @@ func (suite *KeeperTestSuite) SetupTest() {
 	router := types.NewRouter()
 	router = router.AddRoute(types.RouteEquivocation, testEquivocationHandler(evidenceKeeper))
 	evidenceKeeper.SetRouter(router)
-	suite.ctx = testCtx.WithBlockHeader(tmproto.Header{Height: 1})
+
+	suite.ctx = testCtx.Ctx.WithBlockHeader(tmproto.Header{Height: 1})
 	suite.encCfg = moduletestutil.MakeTestEncodingConfig(evidence.AppModuleBasic{})
 
 	suite.accountKeeper = accountKeeper
@@ -120,6 +122,11 @@ func (suite *KeeperTestSuite) SetupTest() {
 	types.RegisterQueryServer(queryHelper, evidenceKeeper)
 	suite.queryClient = types.NewQueryClient(queryHelper)
 	suite.evidenceKeeper = *evidenceKeeper
+
+	suite.Require().Equal(testCtx.Ctx.Logger().With("module", "x/"+types.ModuleName),
+		suite.evidenceKeeper.Logger(testCtx.Ctx))
+
+	suite.msgServer = keeper.NewMsgServerImpl(suite.evidenceKeeper)
 }
 
 func (suite *KeeperTestSuite) populateEvidence(ctx sdk.Context, numEvidence int) []exported.Evidence {

x/evidence/keeper/msg_server_test.go

@@ -0,0 +1,65 @@
+package keeper_test
+
+import (
+	"time"
+
+	"github.com/cosmos/cosmos-sdk/crypto/keys/ed25519"
+	sdk "github.com/cosmos/cosmos-sdk/types"
+	"github.com/cosmos/cosmos-sdk/x/evidence/types"
+)
+
+func (s *KeeperTestSuite) TestSubmitEvidence() {
+	pk := ed25519.GenPrivKey()
+
+	e := &types.Equivocation{
+		Height:           1,
+		Power:            100,
+		Time:             time.Now().UTC(),
+		ConsensusAddress: sdk.ConsAddress(pk.PubKey().Address().Bytes()).String(),
+	}
+
+	validEvidence, err := types.NewMsgSubmitEvidence(sdk.AccAddress(valAddresses[0]), e)
+	s.Require().NoError(err)
+
+	e2 := &types.Equivocation{
+		Height:           0,
+		Power:            100,
+		Time:             time.Now().UTC(),
+		ConsensusAddress: sdk.ConsAddress(pk.PubKey().Address().Bytes()).String(),
+	}
+
+	invalidEvidence, err := types.NewMsgSubmitEvidence(sdk.AccAddress(valAddresses[0]), e2)
+	s.Require().NoError(err)
+
+	testCases := []struct {
+		name      string
+		req       *types.MsgSubmitEvidence
+		expErr    bool
+		expErrMsg string
+	}{
+		{
+			name:      "invalid evidence with height 0",
+			req:       invalidEvidence,
+			expErr:    true,
+			expErrMsg: "invalid equivocation height",
+		},
+		{
+			name:   "valid evidence",
+			req:    validEvidence,
+			expErr: false,
+		},
+	}
+
+	for _, tc := range testCases {
+		tc := tc
+		s.Run(tc.name, func() {
+			_, err := s.msgServer.SubmitEvidence(s.ctx, tc.req)
+			if tc.expErr {
+				s.Require().Error(err)
+				s.Require().Contains(err.Error(), tc.expErrMsg)
+			} else {
+				s.Require().NoError(err)
+			}
+		})
+	}
+}

x/evidence/module.go

@@ -45,7 +45,7 @@ type AppModuleBasic struct {
 	evidenceHandlers []eviclient.EvidenceHandler // eviclient evidence submission handlers
 }
 
-// NewAppModuleBasic crates a AppModuleBasic without the codec.
+// NewAppModuleBasic creates a AppModuleBasic without the codec.
 func NewAppModuleBasic(evidenceHandlers ...eviclient.EvidenceHandler) AppModuleBasic {
 	return AppModuleBasic{
 		evidenceHandlers: evidenceHandlers,
@@ -100,6 +100,7 @@ func (AppModuleBasic) GetQueryCmd() *cobra.Command {
 	return cli.GetQueryCmd()
 }
 
+// RegisterInterfaces registers the evidence module's interface types
 func (AppModuleBasic) RegisterInterfaces(registry codectypes.InterfaceRegistry) {
 	types.RegisterInterfaces(registry)
 }
@@ -115,6 +116,7 @@ type AppModule struct {
 	keeper keeper.Keeper
 }
 
+// NewAppModule creates a new AppModule object.
 func NewAppModule(keeper keeper.Keeper) AppModule {
 	return AppModule{
 		AppModuleBasic: AppModuleBasic{},

x/evidence/types/codec.go

@@ -21,6 +21,7 @@ func RegisterLegacyAminoCodec(cdc *codec.LegacyAmino) {
 	cdc.RegisterConcrete(&Equivocation{}, "cosmos-sdk/Equivocation", nil)
 }
 
+// RegisterInterfaces registers the interfaces types with the interface registry.
 func RegisterInterfaces(registry types.InterfaceRegistry) {
 	registry.RegisterImplementations((*sdk.Msg)(nil), &MsgSubmitEvidence{})
 	registry.RegisterInterface(

x/evidence/types/querier.go

@@ -26,6 +26,7 @@ type QueryAllEvidenceParams struct {
 	Limit int `json:"limit" yaml:"limit"`
 }
 
+// NewQueryAllEvidenceParams creates a new instance to query all evidence params.
 func NewQueryAllEvidenceParams(page, limit int) QueryAllEvidenceParams {
 	return QueryAllEvidenceParams{Page: page, Limit: limit}
 }