Merge PR cosmos#4011: Mint/Inflation Querier, LCD and CLI

* A few godoc updates

* More minor tweaks and reformatting

* Implement initial minting querier

* Implement stringer interface for minting params

* Minor cleanup

* Add minting CLI commands

* Implement inflation query command

* Implement annual provisions query and CLI command

* Update x/mint/client/module_client.go

Co-Authored-By: alexanderbez <[email protected]>

* Update x/mint/client/module_client.go

Co-Authored-By: alexanderbez <[email protected]>

* Update x/mint/client/module_client.go

Co-Authored-By: alexanderbez <[email protected]>

* Update x/mint/querier.go

Co-Authored-By: alexanderbez <[email protected]>

* Add minting REST client routes/handlers

* Fix build issues

* Implement querier unit tests

* Update gaiacli docs

* Implement LCD tests

* Update Swagger docs

* Add pending log entry

* add examples

Signed-off-by: Karoly Albert Szabo <[email protected]>

* revert adding examples

Signed-off-by: Karoly Albert Szabo <[email protected]>

.pending/features/gaia/3886-Implement-minting-module-querier-and-CLI-REST-clients

@@ -0,0 +1 @@
+#3886 Implement minting module querier and CLI/REST clients.

client/lcd/lcd_test.go

@@ -11,6 +11,8 @@ import (
 	"testing"
 	"time"
 
+	"github.com/cosmos/cosmos-sdk/x/mint"
+
 	"github.com/stretchr/testify/require"
 
 	"github.com/cosmos/cosmos-sdk/client"
@@ -1005,3 +1007,29 @@ func TestDistributionFlow(t *testing.T) {
 	resultTx = doWithdrawDelegatorAllRewards(t, port, seed, name1, pw, addr, fees)
 	require.Equal(t, uint32(0), resultTx.Code)
 }
+
+func TestMintingQueries(t *testing.T) {
+	kb, err := keys.NewKeyBaseFromDir(InitClientHome(t, ""))
+	require.NoError(t, err)
+	addr, _ := CreateAddr(t, name1, pw, kb)
+	cleanup, _, _, port := InitializeTestLCD(t, 1, []sdk.AccAddress{addr}, true)
+	defer cleanup()
+
+	res, body := Request(t, port, "GET", "/minting/parameters", nil)
+	require.Equal(t, http.StatusOK, res.StatusCode, body)
+
+	var params mint.Params
+	require.NoError(t, cdc.UnmarshalJSON([]byte(body), &params))
+
+	res, body = Request(t, port, "GET", "/minting/inflation", nil)
+	require.Equal(t, http.StatusOK, res.StatusCode, body)
+
+	var inflation sdk.Dec
+	require.NoError(t, cdc.UnmarshalJSON([]byte(body), &inflation))
+
+	res, body = Request(t, port, "GET", "/minting/annual-provisions", nil)
+	require.Equal(t, http.StatusOK, res.StatusCode, body)
+
+	var annualProvisions sdk.Dec
+	require.NoError(t, cdc.UnmarshalJSON([]byte(body), &annualProvisions))
+}