LCD and CLI

PENDING.md

@@ -23,6 +23,7 @@ FEATURES
     * [cli] [\#2569](https://github.com/cosmos/cosmos-sdk/pull/2569) Add commands to query validator unbondings and redelegations
     * [cli] [\#2524](https://github.com/cosmos/cosmos-sdk/issues/2524) Add support offline mode to `gaiacli tx sign`. Lookups are not performed if the flag `--offline` is on.
     * [cli] [\#2558](https://github.com/cosmos/cosmos-sdk/issues/2558) Rename --print-sigs to --validate-signatures. It now performs a complete set of sanity checks and reports to the user. Also added --print-signature-only to print the signature only, not the whole transaction.
+    * [stake][cli] [\#2027] Add CLI query command for getting all delegations to a specific validator.
 
 * Gaia
 
@@ -46,6 +47,7 @@ IMPROVEMENTS
  - \#2660 [x/mock/simulation] Staking transactions get tested far more frequently
  - #2610 [x/stake] Block redelegation to and from the same validator
  - #2652 [x/auth] Add benchmark for get and set account
+ - \#2027 [x/stake]  Add `Querier` for getting all delegations to a specific validator.
 
 * Tendermint
 

client/lcd/lcd_test.go

@@ -538,14 +538,18 @@ func TestBonding(t *testing.T) {
 
 	require.Equal(t, int64(40), coins.AmountOf(denom).Int64())
 
-	// query validator
+	// query delegation
 	bond := getDelegation(t, port, addr, operAddrs[0])
 	require.Equal(t, amt, bond.Shares)
 
 	delegatorDels := getDelegatorDelegations(t, port, addr)
 	require.Len(t, delegatorDels, 1)
 	require.Equal(t, amt, delegatorDels[0].Shares)
 
+	// query all delegations to validator
+	bonds := getValidatorDelegations(t, port, operAddrs[0])
+	require.Len(t, bonds, 2)
+
 	bondedValidators := getDelegatorValidators(t, port, addr)
 	require.Len(t, bondedValidators, 1)
 	require.Equal(t, operAddrs[0], bondedValidators[0].OperatorAddr)
@@ -1206,6 +1210,17 @@ func getValidator(t *testing.T, port string, validatorAddr sdk.ValAddress) stake
 	return validator
 }
 
+func getValidatorDelegations(t *testing.T, port string, validatorAddr sdk.ValAddress) []stake.Delegation {
+	res, body := Request(t, port, "GET", fmt.Sprintf("/stake/validators/%s/delegations", validatorAddr.String()), nil)
+	require.Equal(t, http.StatusOK, res.StatusCode, body)
+
+	var delegations []stake.Delegation
+	err := cdc.UnmarshalJSON([]byte(body), &delegations)
+	require.Nil(t, err)
+
+	return delegations
+}
+
 func getValidatorUnbondingDelegations(t *testing.T, port string, validatorAddr sdk.ValAddress) []stake.UnbondingDelegation {
 	res, body := Request(t, port, "GET", fmt.Sprintf("/stake/validators/%s/unbonding_delegations", validatorAddr.String()), nil)
 	require.Equal(t, http.StatusOK, res.StatusCode, body)

cmd/gaia/cli_test/cli_test.go

@@ -268,6 +268,10 @@ func TestGaiaCLICreateValidator(t *testing.T) {
 	require.Equal(t, validator.OperatorAddr, sdk.ValAddress(barAddr))
 	require.True(sdk.DecEq(t, sdk.NewDec(2), validator.Tokens))
 
+	validatorDelegations := executeGetValidatorDelegations(t, fmt.Sprintf("gaiacli query delegations-to %s --output=json %v", sdk.ValAddress(barAddr), flags))
+	require.Len(t, validatorDelegations, 1)
+	require.NotZero(t, validatorDelegations[0].Shares)
+
 	// unbond a single share
 	unbondStr := fmt.Sprintf("gaiacli tx unbond begin %v", flags)
 	unbondStr += fmt.Sprintf(" --from=%s", "bar")
@@ -720,6 +724,15 @@ func executeGetValidatorRedelegations(t *testing.T, cmdStr string) []stake.Redel
 	return reds
 }
 
+func executeGetValidatorDelegations(t *testing.T, cmdStr string) []stake.Delegation {
+	out, _ := tests.ExecuteT(t, cmdStr, "")
+	var delegations []stake.Delegation
+	cdc := app.MakeCodec()
+	err := cdc.UnmarshalJSON([]byte(out), &delegations)
+	require.NoError(t, err, "out %v\n, err %v", out, err)
+	return delegations
+}
+
 func executeGetPool(t *testing.T, cmdStr string) stake.Pool {
 	out, _ := tests.ExecuteT(t, cmdStr, "")
 	var pool stake.Pool

x/stake/client/cli/query.go

@@ -290,6 +290,43 @@ func GetCmdQueryDelegations(storeName string, cdc *codec.Codec) *cobra.Command {
 	return cmd
 }
 
+// GetCmdQueryValidatorDelegations implements the command to query all the
+// delegations to a specific validator.
+func GetCmdQueryValidatorDelegations(storeName string, cdc *codec.Codec) *cobra.Command {
+	cmd := &cobra.Command{
+		Use:   "delegations-to [validator-addr]",
+		Short: "Query all delegations made to one validator",
+		Args:  cobra.ExactArgs(1),
+		RunE: func(cmd *cobra.Command, args []string) error {
+			validatorAddr, err := sdk.ValAddressFromBech32(args[0])
+			if err != nil {
+				return err
+			}
+
+			params := stake.QueryValidatorParams{
+				ValidatorAddr: validatorAddr,
+			}
+
+			bz, err := cdc.MarshalJSON(params)
+			if err != nil {
+				return err
+			}
+
+			cliCtx := context.NewCLIContext().WithCodec(cdc)
+
+			res, err := cliCtx.QueryWithData("custom/stake/validatorDelegations", bz)
+			if err != nil {
+				return err
+			}
+
+			fmt.Println(string(res))
+			return nil
+		},
+	}
+
+	return cmd
+}
+
 // GetCmdQueryUnbondingDelegation implements the command to query a single
 // unbonding-delegation record.
 func GetCmdQueryUnbondingDelegation(storeName string, cdc *codec.Codec) *cobra.Command {

x/stake/client/rest/query.go

@@ -78,6 +78,12 @@ func registerQueryRoutes(cliCtx context.CLIContext, r *mux.Router, cdc *codec.Co
 		validatorHandlerFn(cliCtx, cdc),
 	).Methods("GET")
 
+	// Get all delegations to a  validator
+	r.HandleFunc(
+		"/stake/validators/{validatorAddr}/delegations",
+		validatorDelegationsHandlerFn(cliCtx, cdc),
+	).Methods("GET")
+
 	// Get all unbonding delegations from a validator
 	r.HandleFunc(
 		"/stake/validators/{validatorAddr}/unbonding_delegations",
@@ -227,6 +233,11 @@ func validatorHandlerFn(cliCtx context.CLIContext, cdc *codec.Codec) http.Handle
 	return queryValidator(cliCtx, cdc, "custom/stake/validator")
 }
 
+// HTTP request handler to query all unbonding delegations from a validator
+func validatorDelegationsHandlerFn(cliCtx context.CLIContext, cdc *codec.Codec) http.HandlerFunc {
+	return queryValidator(cliCtx, cdc, "custom/stake/validatorDelegations")
+}
+
 // HTTP request handler to query all unbonding delegations from a validator
 func validatorUnbondingDelegationsHandlerFn(cliCtx context.CLIContext, cdc *codec.Codec) http.HandlerFunc {
 	return queryValidator(cliCtx, cdc, "custom/stake/validatorUnbondingDelegations")