diff --git a/cli_test/cli_test.go b/cli_test/cli_test.go
index 71e9658f3..393a83188 100644
--- a/cli_test/cli_test.go
+++ b/cli_test/cli_test.go
@@ -523,7 +523,7 @@ func TestTerraCLISubmitProposal(t *testing.T) {
 	tests.WaitForNextNBlocksTM(1, f.Port)
 
 	// Ensure transaction tags can be queried
-	searchResult := f.QueryTxs(1, 50, "message.action:submit_proposal", fmt.Sprintf("message.sender:%s", fooAddr))
+	searchResult := f.QueryTxs(1, 50, "message.action=submit_proposal", fmt.Sprintf("message.sender=%s", fooAddr))
 	require.Len(t, searchResult.Txs, 1)
 
 	// Ensure deposit was deducted
@@ -567,7 +567,7 @@ func TestTerraCLISubmitProposal(t *testing.T) {
 	require.Equal(t, proposalTokens.Add(depositTokens), deposit.Amount.AmountOf(denom))
 
 	// Ensure tags are set on the transaction
-	searchResult = f.QueryTxs(1, 50, "message.action:deposit", fmt.Sprintf("message.sender:%s", fooAddr))
+	searchResult = f.QueryTxs(1, 50, "message.action=deposit", fmt.Sprintf("message.sender=%s", fooAddr))
 	require.Len(t, searchResult.Txs, 1)
 
 	// Ensure account has expected amount of funds
@@ -604,7 +604,7 @@ func TestTerraCLISubmitProposal(t *testing.T) {
 	require.Equal(t, gov.OptionYes, votes[0].Option)
 
 	// Ensure tags are applied to voting transaction properly
-	searchResult = f.QueryTxs(1, 50, "message.action:vote", fmt.Sprintf("message.sender:%s", fooAddr))
+	searchResult = f.QueryTxs(1, 50, "message.action=vote", fmt.Sprintf("message.sender=%s", fooAddr))
 	require.Len(t, searchResult.Txs, 1)
 
 	// Ensure no proposals in deposit period
@@ -666,7 +666,7 @@ func TestTerraCLISubmitParamChangeProposal(t *testing.T) {
 	tests.WaitForNextNBlocksTM(1, f.Port)
 
 	// ensure transaction tags can be queried
-	txsPage := f.QueryTxs(1, 50, "message.action:submit_proposal", fmt.Sprintf("message.sender:%s", fooAddr))
+	txsPage := f.QueryTxs(1, 50, "message.action=submit_proposal", fmt.Sprintf("message.sender=%s", fooAddr))
 	require.Len(t, txsPage.Txs, 1)
 
 	// ensure deposit was deducted
@@ -731,7 +731,7 @@ func TestTerraCLISubmitParamChangeProposal(t *testing.T) {
 // 	tests.WaitForNextNBlocksTM(1, f.Port)
 
 // 	// ensure transaction tags can be queried
-// 	txsPage := f.QueryTxs(1, 50, "message.action:submit_proposal", fmt.Sprintf("message.sender:%s", fooAddr))
+// 	txsPage := f.QueryTxs(1, 50, "message.action=submit_proposal", fmt.Sprintf("message.sender=%s", fooAddr))
 // 	require.Len(t, txsPage.Txs, 1)
 
 // 	// ensure deposit was deducted
@@ -813,7 +813,7 @@ func TestTerraCLISubmitCommunityPoolSpendProposal(t *testing.T) {
 	tests.WaitForNextNBlocksTM(1, f.Port)
 
 	// ensure transaction tags can be queried
-	txsPage := f.QueryTxs(1, 50, "message.action:submit_proposal", fmt.Sprintf("message.sender:%s", fooAddr))
+	txsPage := f.QueryTxs(1, 50, "message.action=submit_proposal", fmt.Sprintf("message.sender=%s", fooAddr))
 	require.Len(t, txsPage.Txs, 1)
 
 	// ensure deposit was deducted
@@ -858,30 +858,30 @@ func TestTerraCLIQueryTxPagination(t *testing.T) {
 	}
 
 	// perPage = 15, 2 pages
-	txsPage1 := f.QueryTxs(1, 15, fmt.Sprintf("message.sender:%s", fooAddr))
+	txsPage1 := f.QueryTxs(1, 15, fmt.Sprintf("message.sender=%s", fooAddr))
 	require.Len(t, txsPage1.Txs, 15)
 	require.Equal(t, txsPage1.Count, 15)
-	txsPage2 := f.QueryTxs(2, 15, fmt.Sprintf("message.sender:%s", fooAddr))
+	txsPage2 := f.QueryTxs(2, 15, fmt.Sprintf("message.sender=%s", fooAddr))
 	require.Len(t, txsPage2.Txs, 15)
 	require.NotEqual(t, txsPage1.Txs, txsPage2.Txs)
 
 	// perPage = 16, 2 pages
-	txsPage1 = f.QueryTxs(1, 16, fmt.Sprintf("message.sender:%s", fooAddr))
+	txsPage1 = f.QueryTxs(1, 16, fmt.Sprintf("message.sender=%s", fooAddr))
 	require.Len(t, txsPage1.Txs, 16)
-	txsPage2 = f.QueryTxs(2, 16, fmt.Sprintf("message.sender:%s", fooAddr))
+	txsPage2 = f.QueryTxs(2, 16, fmt.Sprintf("message.sender=%s", fooAddr))
 	require.Len(t, txsPage2.Txs, 14)
 	require.NotEqual(t, txsPage1.Txs, txsPage2.Txs)
 
 	// perPage = 50
-	txsPageFull := f.QueryTxs(1, 50, fmt.Sprintf("message.sender:%s", fooAddr))
+	txsPageFull := f.QueryTxs(1, 50, fmt.Sprintf("message.sender=%s", fooAddr))
 	require.Len(t, txsPageFull.Txs, 30)
 	require.Equal(t, txsPageFull.Txs, append(txsPage1.Txs, txsPage2.Txs...))
 
 	// perPage = 0
-	f.QueryTxsInvalid(errors.New("ERROR: page must greater than 0"), 0, 50, fmt.Sprintf("message.sender:%s", fooAddr))
+	f.QueryTxsInvalid(errors.New("ERROR: page must greater than 0"), 0, 50, fmt.Sprintf("message.sender=%s", fooAddr))
 
 	// limit = 0
-	f.QueryTxsInvalid(errors.New("ERROR: limit must greater than 0"), 1, 0, fmt.Sprintf("message.sender:%s", fooAddr))
+	f.QueryTxsInvalid(errors.New("ERROR: limit must greater than 0"), 1, 0, fmt.Sprintf("message.sender=%s", fooAddr))
 
 	// Cleanup testing directories
 	f.Cleanup()
diff --git a/cli_test/test_helpers.go b/cli_test/test_helpers.go
index b56cf2d8d..1c9c30e0d 100644
--- a/cli_test/test_helpers.go
+++ b/cli_test/test_helpers.go
@@ -449,8 +449,8 @@ func (f *Fixtures) QueryAccount(address sdk.AccAddress, flags ...string) authtyp
 // terracli query txs
 
 // QueryTxs is terracli query txs
-func (f *Fixtures) QueryTxs(page, limit int, tags ...string) *sdk.SearchTxsResult {
-	cmd := fmt.Sprintf("%s query txs --page=%d --limit=%d --tags='%s' %v", f.TerracliBinary, page, limit, queryTags(tags), f.Flags())
+func (f *Fixtures) QueryTxs(page, limit int, events ...string) *sdk.SearchTxsResult {
+	cmd := fmt.Sprintf("%s query txs --page=%d --limit=%d --events='%s' %v", f.TerracliBinary, page, limit, queryEvents(events), f.Flags())
 	out, _ := tests.ExecuteT(f.T, cmd, "")
 	var result sdk.SearchTxsResult
 	cdc := app.MakeCodec()
@@ -460,8 +460,8 @@ func (f *Fixtures) QueryTxs(page, limit int, tags ...string) *sdk.SearchTxsResul
 }
 
 // QueryTxsInvalid query txs with wrong parameters and compare expected error
-func (f *Fixtures) QueryTxsInvalid(expectedErr error, page, limit int, tags ...string) {
-	cmd := fmt.Sprintf("%s query txs --page=%d --limit=%d --tags='%s' %v", f.TerracliBinary, page, limit, queryTags(tags), f.Flags())
+func (f *Fixtures) QueryTxsInvalid(expectedErr error, page, limit int, events ...string) {
+	cmd := fmt.Sprintf("%s query txs --page=%d --limit=%d --events='%s' %v", f.TerracliBinary, page, limit, queryEvents(events), f.Flags())
 	_, err := tests.ExecuteT(f.T, cmd, "")
 	require.EqualError(f.T, expectedErr, err)
 }
@@ -750,9 +750,9 @@ func addFlags(cmd string, flags []string) string {
 	return strings.TrimSpace(cmd)
 }
 
-func queryTags(tags []string) (out string) {
-	for _, tag := range tags {
-		out += tag + "&"
+func queryEvents(events []string) (out string) {
+	for _, event := range events {
+		out += event + "&"
 	}
 	return strings.TrimSuffix(out, "&")
 }
diff --git a/go.mod b/go.mod
index 3cb93211b..fc9d88700 100644
--- a/go.mod
+++ b/go.mod
@@ -3,7 +3,7 @@ module github.com/terra-project/core
 go 1.13
 
 require (
-	github.com/cosmos/cosmos-sdk v0.37.4
+	github.com/cosmos/cosmos-sdk v0.37.5
 	github.com/cosmos/go-bip39 v0.0.0-20180819234021-555e2067c45d // indirect
 	github.com/gorilla/mux v1.7.2
 	github.com/otiai10/copy v1.0.2
@@ -12,11 +12,11 @@ require (
 	github.com/rakyll/statik v0.1.6
 	github.com/snikch/goodman v0.0.0-20171125024755-10e37e294daa
 	github.com/spf13/cobra v0.0.5
-	github.com/spf13/pflag v1.0.3
-	github.com/spf13/viper v1.4.0
+	github.com/spf13/pflag v1.0.5
+	github.com/spf13/viper v1.6.1
 	github.com/stretchr/testify v1.4.0
 	github.com/tendermint/go-amino v0.15.0
-	github.com/tendermint/tendermint v0.32.7
+	github.com/tendermint/tendermint v0.32.8
 	github.com/tendermint/tm-db v0.2.0
 	golang.org/x/net v0.0.0-20190827160401-ba9fcec4b297 // indirect
 )
diff --git a/go.sum b/go.sum
index ffd0c618d..dc3e505b6 100644
--- a/go.sum
+++ b/go.sum
@@ -29,6 +29,7 @@ github.com/btcsuite/goleveldb v0.0.0-20160330041536-7834afc9e8cd/go.mod h1:F+uVa
 github.com/btcsuite/snappy-go v0.0.0-20151229074030-0bdef8d06723/go.mod h1:8woku9dyThutzjeg+3xrA5iCpBRH8XEEg3lh6TiUghc=
 github.com/btcsuite/websocket v0.0.0-20150119174127-31079b680792/go.mod h1:ghJtEyQwv5/p4Mg4C0fgbePVuGr935/5ddU9Z3TmDRY=
 github.com/btcsuite/winsvc v1.0.0/go.mod h1:jsenWakMcC0zFBFurPLEAyrnc/teJEM1O46fmI40EZs=
+github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
 github.com/cespare/xxhash v1.1.0/go.mod h1:XrSqR1VqqWfGrhpAt58auRo0WTKS1nRRg3ghfAqPWnc=
 github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
 github.com/coreos/bbolt v1.3.2/go.mod h1:iRUV2dpdMOn7Bo10OQBFzIJO9kkE559Wcmn+qkEiiKk=
@@ -37,8 +38,8 @@ github.com/coreos/go-etcd v2.0.0+incompatible/go.mod h1:Jez6KQU2B/sWsbdaef3ED8Nz
 github.com/coreos/go-semver v0.2.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3EedlOD2RNk=
 github.com/coreos/go-systemd v0.0.0-20190321100706-95778dfbb74e/go.mod h1:F5haX7vjVVG0kc13fIWeqUViNPyEJxv/OmvnBo0Yme4=
 github.com/coreos/pkg v0.0.0-20180928190104-399ea9e2e55f/go.mod h1:E3G3o1h8I7cfcXa63jLwjI0eiQQMgzzUDFVpN/nH/eA=
-github.com/cosmos/cosmos-sdk v0.37.4 h1:1ioXxkpiS+wOgaUbROeDIyuF7hciU5nti0TSyBmV2Ok=
-github.com/cosmos/cosmos-sdk v0.37.4/go.mod h1:Axr+Q+G2Ffduxt4zMA6KwxxvyVSKPB9+nXZVPKgpC2c=
+github.com/cosmos/cosmos-sdk v0.37.5 h1:s03HFQ5N2CkiS/nENtACdfCwUUXSn7E5AvkWBk7wNGM=
+github.com/cosmos/cosmos-sdk v0.37.5/go.mod h1:d0WLPdlZyfbfHvFPa+GfWXFxHAiVCpOKp3bDm2YxFN8=
 github.com/cosmos/go-bip39 v0.0.0-20180618194314-52158e4697b8/go.mod h1:tSxLoYXyBmiFeKpvmq4dzayMdCjCnu8uqmCysIGBT2Y=
 github.com/cosmos/go-bip39 v0.0.0-20180819234021-555e2067c45d h1:49RLWk1j44Xu4fjHb6JFYmeUnDORVwHNkDxaQ0ctCVU=
 github.com/cosmos/go-bip39 v0.0.0-20180819234021-555e2067c45d/go.mod h1:tSxLoYXyBmiFeKpvmq4dzayMdCjCnu8uqmCysIGBT2Y=
@@ -53,6 +54,8 @@ github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/dgrijalva/jwt-go v3.2.0+incompatible/go.mod h1:E3ru+11k8xSBh+hMPgOLZmtrrCbhqsmaPHjLKYnJCaQ=
 github.com/dgryski/go-sip13 v0.0.0-20181026042036-e10d5fee7954/go.mod h1:vAd38F8PWV+bWy6jNmig1y/TA+kYO4g3RSRF0IAv0no=
+github.com/envoyproxy/go-control-plane v0.9.0/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
+github.com/envoyproxy/protoc-gen-validate v0.1.0/go.mod h1:iSmxcyjqTsJpI2R4NaDN7+kN2VEUnK/pcBlmesArF7c=
 github.com/etcd-io/bbolt v1.3.2/go.mod h1:ZF2nL25h33cCyBtcyWeZ2/I3HQOfTP+0PIEvHjkjCrw=
 github.com/etcd-io/bbolt v1.3.3 h1:gSJmxrs37LgTqR/oyJBWok6k6SvXEUerFTbltIhXkBM=
 github.com/etcd-io/bbolt v1.3.3/go.mod h1:ZF2nL25h33cCyBtcyWeZ2/I3HQOfTP+0PIEvHjkjCrw=
@@ -82,8 +85,8 @@ github.com/go-stack/stack v1.8.0/go.mod h1:v0f6uXyyMGvRgIKkXu+yp6POWl0qKG85gN/me
 github.com/gogo/protobuf v1.1.1/go.mod h1:r8qH/GZQm5c6nD/R0oafs1akxWv10x8SbQlK7atdtwQ=
 github.com/gogo/protobuf v1.2.1 h1:/s5zKNz0uPFCZ5hddgPdo2TK2TVrUNMn0OOX8/aZMTE=
 github.com/gogo/protobuf v1.2.1/go.mod h1:hp+jE20tsWTFYpLwKvXlhS1hjn+gTNwPg2I6zVXpSg4=
-github.com/gogo/protobuf v1.3.0 h1:G8O7TerXerS4F6sx9OV7/nRfJdnXgHZu/S/7F2SN+UE=
-github.com/gogo/protobuf v1.3.0/go.mod h1:SlYgWuQ5SjCEi6WLHjHCa1yvBfUnHcTbrrZtXPKa29o=
+github.com/gogo/protobuf v1.3.1 h1:DqDEcV5aeaTmdFBePNpYsp3FlcVH/2ISVVM9Qf8PSls=
+github.com/gogo/protobuf v1.3.1/go.mod h1:SlYgWuQ5SjCEi6WLHjHCa1yvBfUnHcTbrrZtXPKa29o=
 github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b h1:VKtxabqXZkF25pY9ekfRL6a582T4P37/31XEstQ5p58=
 github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfUlaOkMMuAQtPIUF8ecWP5IEl/CR7VP2Q=
 github.com/golang/groupcache v0.0.0-20190129154638-5b532d6fd5ef/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc=
@@ -102,6 +105,8 @@ github.com/google/go-cmp v0.2.0/go.mod h1:oXzfMopK8JAjlY9xF4vHSVASa0yLyX7SntLO5a
 github.com/google/gofuzz v0.0.0-20170612174753-24818f796faf/go.mod h1:HP5RmnzzSNb993RKQDq4+1A4ia9nllfqcQFTQJedwGI=
 github.com/google/gofuzz v1.0.0 h1:A8PeW59pxE9IoFRqBp37U+mSNaQoZ46F1f0f863XSXw=
 github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
+github.com/gopherjs/gopherjs v0.0.0-20181017120253-0766667cb4d1 h1:EGx4pi6eqNxGaHF6qqu48+N2wcFQ5qg5FXgOdqsJ5d8=
+github.com/gopherjs/gopherjs v0.0.0-20181017120253-0766667cb4d1/go.mod h1:wJfORRmW1u3UXTncJ5qlYoELFm8eSnnEO6hX4iZ3EWY=
 github.com/gorilla/mux v1.7.0/go.mod h1:1lud6UwP+6orDFRuTfBEV8e9/aOM/c4fVVCaMa2zaAs=
 github.com/gorilla/mux v1.7.2 h1:zoNxOV7WjqXptQOVngLmcSQgXmgk4NMz1HibBchjl/I=
 github.com/gorilla/mux v1.7.2/go.mod h1:1lud6UwP+6orDFRuTfBEV8e9/aOM/c4fVVCaMa2zaAs=
@@ -123,6 +128,8 @@ github.com/jmhodges/levigo v1.0.0 h1:q5EC36kV79HWeTBWsod3mG11EgStG3qArTKcvlksN1U
 github.com/jmhodges/levigo v1.0.0/go.mod h1:Q6Qx+uH3RAqyK4rFQroq9RL7mdkABMcfhEI+nNuzMJQ=
 github.com/jonboulle/clockwork v0.1.0/go.mod h1:Ii8DK3G1RaLaWxj9trq07+26W01tbo22gdxWY5EU2bo=
 github.com/jrick/logrotate v1.0.0/go.mod h1:LNinyqDIJnpAur+b8yyulnQw/wDuN1+BYKlTRt3OuAQ=
+github.com/jtolds/gls v4.20.0+incompatible h1:xdiiI2gbIgH/gLH7ADydsJ1uDOEzR8yvV7C0MuV77Wo=
+github.com/jtolds/gls v4.20.0+incompatible/go.mod h1:QJZ7F/aHp+rZTRtaJ1ow/lLfFfVYBRgL+9YlvaHOwJU=
 github.com/julienschmidt/httprouter v1.2.0/go.mod h1:SYymIcj16QtmaHHD7aYtjjsJG7VTCxuUUipMqKk8s4w=
 github.com/kisielk/errcheck v1.1.0/go.mod h1:EZBBE59ingxPouuu3KfxchcWSUPOHkagtvWXihfKN4Q=
 github.com/kisielk/errcheck v1.2.0/go.mod h1:/BMXB+zMLi60iA8Vv6Ksmxu/1UDYcXs4uQLJ+jE2L00=
@@ -178,6 +185,8 @@ github.com/prometheus/client_golang v0.9.3/go.mod h1:/TN21ttK/J9q6uSwhBd54HahCDf
 github.com/prometheus/client_model v0.0.0-20180712105110-5c3871d89910/go.mod h1:MbSGuTsp3dbXC40dX6PRTWyKYBIrTGTE9sqQNg2J8bo=
 github.com/prometheus/client_model v0.0.0-20190129233127-fd36f4220a90 h1:S/YWwWx/RA8rT8tKFRuGUZhuA90OyIBpPCXkcbwU8DE=
 github.com/prometheus/client_model v0.0.0-20190129233127-fd36f4220a90/go.mod h1:xMI15A0UPsDsEKsMN9yxemIoYk6Tm2C1GtYGdfGttqA=
+github.com/prometheus/client_model v0.0.0-20190812154241-14fe0d1b01d4 h1:gQz4mCbXsO+nc9n1hCxHcGA3Zx3Eo+UHZoInFGUIXNM=
+github.com/prometheus/client_model v0.0.0-20190812154241-14fe0d1b01d4/go.mod h1:xMI15A0UPsDsEKsMN9yxemIoYk6Tm2C1GtYGdfGttqA=
 github.com/prometheus/common v0.0.0-20181020173914-7e9e6cabbd39/go.mod h1:daVV7qP5qjZbuso7PdcryaAu0sAZbrN9i7WWcTMWvro=
 github.com/prometheus/common v0.0.0-20181113130724-41aa239b4cce/go.mod h1:daVV7qP5qjZbuso7PdcryaAu0sAZbrN9i7WWcTMWvro=
 github.com/prometheus/common v0.4.0 h1:7etb9YClo3a6HjLzfl6rIQaU+FDfi0VSX39io3aQ+DM=
@@ -198,6 +207,10 @@ github.com/rs/cors v1.7.0 h1:+88SsELBHx5r+hZ8TCkggzSstaWNbDvThkVK8H6f9ik=
 github.com/rs/cors v1.7.0/go.mod h1:gFx+x8UowdsKA9AchylcLynDq+nNFfI8FkUZdN/jGCU=
 github.com/russross/blackfriday v1.5.2/go.mod h1:JO/DiYxRf+HjHt06OyowR9PTA263kcR/rfWxYHBV53g=
 github.com/sirupsen/logrus v1.2.0/go.mod h1:LxeOpSwHxABJmUn/MG1IvRgCAasNZTLOkJPxbbu5VWo=
+github.com/smartystreets/assertions v0.0.0-20180927180507-b2de0cb4f26d h1:zE9ykElWQ6/NYmHa3jpm/yHnI4xSofP+UP6SpjHcSeM=
+github.com/smartystreets/assertions v0.0.0-20180927180507-b2de0cb4f26d/go.mod h1:OnSkiWE9lh6wB0YB77sQom3nweQdgAjqCqsofrRNTgc=
+github.com/smartystreets/goconvey v1.6.4 h1:fv0U8FUIMPNf1L9lnHLvLhgicrIVChEkdzIKYqbNC9s=
+github.com/smartystreets/goconvey v1.6.4/go.mod h1:syvi0/a8iFYH4r/RixwvyeAJjdLS9QV7WQ/tjFTllLA=
 github.com/snikch/goodman v0.0.0-20171125024755-10e37e294daa h1:YJfZp12Z3AFhSBeXOlv4BO55RMwPn2NoQeDsrdWnBtY=
 github.com/snikch/goodman v0.0.0-20171125024755-10e37e294daa/go.mod h1:oJyF+mSPHbB5mVY2iO9KV3pTt/QbIkGaO8gQ2WrDbP4=
 github.com/soheilhy/cmux v0.1.4/go.mod h1:IM3LyeVVIOuxMH7sFAkER9+bJ4dT7Ms6E4xg4kGIyLM=
@@ -215,11 +228,14 @@ github.com/spf13/jwalterweatherman v1.1.0 h1:ue6voC5bR5F8YxI5S67j9i582FU4Qvo2bmq
 github.com/spf13/jwalterweatherman v1.1.0/go.mod h1:aNWZUN0dPAAO/Ljvb5BEdw96iTZ0EXowPYD95IqWIGo=
 github.com/spf13/pflag v1.0.3 h1:zPAT6CGy6wXeQ7NtTnaTerfKOsV6V6F8agHXFiazDkg=
 github.com/spf13/pflag v1.0.3/go.mod h1:DYY7MBk1bdzusC3SYhjObp+wFpr4gzcvqqNjLnInEg4=
+github.com/spf13/pflag v1.0.5 h1:iy+VFUOCP1a+8yFto/drg2CJ5u0yRoB7fZw3DKv/JXA=
+github.com/spf13/pflag v1.0.5/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
 github.com/spf13/viper v1.0.0/go.mod h1:A8kyI5cUJhb8N+3pkfONlcEcZbueH6nhAm0Fq7SrnBM=
 github.com/spf13/viper v1.3.2 h1:VUFqw5KcqRf7i70GOzW7N+Q7+gxVBkSSqiXB12+JQ4M=
 github.com/spf13/viper v1.3.2/go.mod h1:ZiWeW+zYFKm7srdB9IoDzzZXaJaI5eL9QjNiN/DMA2s=
-github.com/spf13/viper v1.4.0 h1:yXHLWeravcrgGyFSyCgdYpXQ9dR9c/WED3pg1RhxqEU=
-github.com/spf13/viper v1.4.0/go.mod h1:PTJ7Z/lr49W6bUbkmS1V3by4uWynFiR9p7+dSq/yZzE=
+github.com/spf13/viper v1.5.0/go.mod h1:AkYRkVJF8TkSG/xet6PzXX+l39KhhXa2pdqVSxnTcn4=
+github.com/spf13/viper v1.6.1 h1:VPZzIkznI1YhVMRi6vNFLHSwhnhReBfgTxIPccpfdZk=
+github.com/spf13/viper v1.6.1/go.mod h1:t3iDnF5Jlj76alVNuyFBk5oUMCvsrkbvZK0WQdfDi5k=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/objx v0.1.1/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
@@ -229,6 +245,8 @@ github.com/stretchr/testify v1.4.0 h1:2E4SXV/wtOkTonXsotYi4li6zVWxYlZuYNCXe9XRJy
 github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
 github.com/stumble/gorocksdb v0.0.3 h1:9UU+QA1pqFYJuf9+5p7z1IqdE5k0mma4UAeu2wmX8kA=
 github.com/stumble/gorocksdb v0.0.3/go.mod h1:v6IHdFBXk5DJ1K4FZ0xi+eY737quiiBxYtSWXadLybY=
+github.com/subosito/gotenv v1.2.0 h1:Slr1R9HxAlEKefgq5jn9U+DnETlIUa6HfgEzj0g5d7s=
+github.com/subosito/gotenv v1.2.0/go.mod h1:N0PQaV/YGNqwC0u51sEeR/aUtSLEXKX9iv69rRypqCw=
 github.com/syndtr/goleveldb v1.0.1-0.20190318030020-c3a204f8e965 h1:1oFLiOyVl+W7bnBzGhf7BbIv9loSFQcieWWYIjLqcAw=
 github.com/syndtr/goleveldb v1.0.1-0.20190318030020-c3a204f8e965/go.mod h1:9OrXJhf154huy1nPWmuSrkgjPUtUNhA+Zmy+6AESzuA=
 github.com/tendermint/btcd v0.1.1 h1:0VcxPfflS2zZ3RiOAHkBiFUcPvbtRj5O7zHmcJWHV7s=
@@ -241,8 +259,8 @@ github.com/tendermint/go-amino v0.15.0/go.mod h1:TQU0M1i/ImAo+tYpZi73AU3V/dKeCoM
 github.com/tendermint/iavl v0.12.4 h1:hd1woxUGISKkfUWBA4mmmTwOua6PQZTJM/F0FDrmMV8=
 github.com/tendermint/iavl v0.12.4/go.mod h1:8LHakzt8/0G3/I8FUU0ReNx98S/EP6eyPJkAUvEXT/o=
 github.com/tendermint/tendermint v0.32.1/go.mod h1:jmPDAKuNkev9793/ivn/fTBnfpA9mGBww8MPRNPNxnU=
-github.com/tendermint/tendermint v0.32.7 h1:Szu5Fm1L3pvn3t4uQxPAcP+7ndZEQKgLie/yokM56rU=
-github.com/tendermint/tendermint v0.32.7/go.mod h1:D2+A3pNjY+Po72X0mTfaXorFhiVI8dh/Zg640FGyGtE=
+github.com/tendermint/tendermint v0.32.8 h1:eOaLJGRi5x/Rb23fiVsxq9c5fZ/6O5QplExlGjNPDVI=
+github.com/tendermint/tendermint v0.32.8/go.mod h1:5/B1XZjNYtVBso8o1l/Eg4A0Mhu42lDcmftoQl95j/E=
 github.com/tendermint/tm-db v0.1.1 h1:G3Xezy3sOk9+ekhjZ/kjArYIs1SmwV+1OUgNkj7RgV0=
 github.com/tendermint/tm-db v0.1.1/go.mod h1:0cPKWu2Mou3IlxecH+MEUSYc1Ch537alLe6CpFrKzgw=
 github.com/tendermint/tm-db v0.2.0 h1:rJxgdqn6fIiVJZy4zLpY1qVlyD0TU6vhkT4kEf71TQQ=
@@ -267,12 +285,16 @@ golang.org/x/crypto v0.0.0-20190228161510-8dd112bcdc25/go.mod h1:djNgcEr1/C05ACk
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.0.0-20190313024323-a1f597ede03a h1:YX8ljsm6wXlHZO+aRz9Exqr0evNhKRNe5K/gi+zKh4U=
 golang.org/x/crypto v0.0.0-20190313024323-a1f597ede03a/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
+golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
 golang.org/x/lint v0.0.0-20181026193005-c67002cb31c3/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE=
+golang.org/x/lint v0.0.0-20190227174305-5b3e6a55c961/go.mod h1:wehouNa3lNwaWXcvxsM5YxQ5yQlVC4a0KAMCusXpPoU=
 golang.org/x/lint v0.0.0-20190313153728-d0100b6bd8b3/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
+golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20180826012351-8a410e7b638d/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20180906233101-161cd47e91fd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20181114220301-adae6a3d119a/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20181220203305-927f97764cc3/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
+golang.org/x/net v0.0.0-20190213061140-3a22650c66bd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
 golang.org/x/net v0.0.0-20190522155817-f3200d17e092/go.mod h1:HSz+uSET+XFnRR8LxR5pz3Of3rY3CfYBVs4xY44aLks=
 golang.org/x/net v0.0.0-20190628185345-da137c7871d7 h1:rTIdg5QFRR7XCaK4LCjBiPbx8j4DQRpdYMnGn/bJUEU=
@@ -294,27 +316,35 @@ golang.org/x/sys v0.0.0-20181205085412-a5c9d58dba9a/go.mod h1:STP8DvDyc/dI5b8T5h
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190222072716-a9d3bda3a223 h1:DH4skfRX4EBpamg7iV4ZlCpblAHI6s6TDM39bFZumv8=
 golang.org/x/sys v0.0.0-20190222072716-a9d3bda3a223/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20190813064441-fde4db37ae7a h1:aYOabOQFp6Vj6W1F80affTUvO9UxmJRx8K0gsfABByQ=
+golang.org/x/sys v0.0.0-20190813064441-fde4db37ae7a/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/text v0.3.0 h1:g61tztE5qeGQ89tm6NTjjM9VPIm088od1l6aSorWRWg=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/time v0.0.0-20190308202827-9d24e82272b4/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
 golang.org/x/tools v0.0.0-20180221164845-07fd8470d635/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20181030221726-6c7e314b6563/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20190114222345-bf090417da8b/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
+golang.org/x/tools v0.0.0-20190226205152-f727befe758c/go.mod h1:9Yl7xja0Znq3iFh3HoIrodX9oNMXvdceNzlUR8zjMvY=
 golang.org/x/tools v0.0.0-20190311212946-11955173bddd/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
+golang.org/x/tools v0.0.0-20190328211700-ab21143f2384/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
 golang.org/x/tools v0.0.0-20190425150028-36563e24a262/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q=
 golang.org/x/tools v0.0.0-20190524140312-2c0ae7006135/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q=
 google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
+google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
 google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc=
 google.golang.org/genproto v0.0.0-20180831171423-11092d34479b/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc=
 google.golang.org/genproto v0.0.0-20181029155118-b69ba1387ce2 h1:67iHsV9djwGdZpdZNbLuQj6FOzCaZe3w+vhLjn5AcFA=
 google.golang.org/genproto v0.0.0-20181029155118-b69ba1387ce2/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc=
+google.golang.org/genproto v0.0.0-20190819201941-24fa4b261c55 h1:gSJIx1SDwno+2ElGhA4+qG2zF97qiUzTM+rQ0klBOcE=
+google.golang.org/genproto v0.0.0-20190819201941-24fa4b261c55/go.mod h1:DMBHOl98Agz4BDEuKkezgsaosCRResVns1a3J2ZsMNc=
 google.golang.org/grpc v1.13.0/go.mod h1:yo6s7OP7yaDglbqo1J04qKzAhqBH6lvTonzMVmEdcZw=
 google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
 google.golang.org/grpc v1.21.0/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM=
 google.golang.org/grpc v1.22.0 h1:J0UbZOIrCAl+fpTOf8YLs4dJo8L/owV4LYVtAXQoPkw=
 google.golang.org/grpc v1.22.0/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg=
-google.golang.org/grpc v1.23.1 h1:q4XQuHFC6I28BKZpo6IYyb3mNO+l7lSOxRuYTCiDfXk=
-google.golang.org/grpc v1.23.1/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg=
+google.golang.org/grpc v1.23.0/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg=
+google.golang.org/grpc v1.25.1 h1:wdKvqQk7IttEw92GoRyKG2IDrUIpgpj6H6m81yfeMW0=
+google.golang.org/grpc v1.25.1/go.mod h1:c3i+UQWmh7LiEpx4sFZnkU36qjEYZ0imhYfXVyQciAY=
 gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
@@ -322,6 +352,8 @@ gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 h1:qIbj1fsPNlZgppZ+VLlY7N33
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/fsnotify.v1 v1.4.7 h1:xOHLXZwVvI9hhs+cLKq5+I5onOuwQLhQwiu63xxlHs4=
 gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys=
+gopkg.in/ini.v1 v1.51.0 h1:AQvPpx3LzTDM0AjnIRlVFwFFGC+npRopjZxLJj6gdno=
+gopkg.in/ini.v1 v1.51.0/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k=
 gopkg.in/resty.v1 v1.12.0/go.mod h1:mDo4pnntr5jdWRML875a/NmxYqAlA73dVijT2AXvQQo=
 gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7 h1:uRGJdciOHaEIrze2W8Q3AKkepLTh2hOroT7a+7czfdQ=
 gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=
@@ -329,5 +361,8 @@ gopkg.in/yaml.v2 v2.0.0-20170812160011-eb3733d160e7/go.mod h1:JAlM8MvJe8wmxCU4Bl
 gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.2.7 h1:VUgggvou5XRW9mHwD/yXxIYSMtY0zoKQf/v226p2nyo=
+gopkg.in/yaml.v2 v2.2.7/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
diff --git a/x/auth/ante.go b/x/auth/ante.go
index bf2d48a98..573e718fd 100644
--- a/x/auth/ante.go
+++ b/x/auth/ante.go
@@ -461,7 +461,7 @@ func EnsureSufficientMempoolFees(ctx sdk.Context, stdFee StdFee, taxes sdk.Coins
 		).Result()
 	}
 
-	if !requiredFees.Empty() && !stdFee.Amount.IsAnyGTE(requiredFees) {
+	if !requiredFees.IsZero() && !stdFee.Amount.IsAnyGTE(requiredFees) {
 		return sdk.ErrInsufficientFee(
 			fmt.Sprintf(
 				"insufficient fees; got: %q, required: %q = %q(gas) +%q(stability)", stdFee.Amount.Add(taxes), requiredFees.Add(taxes), requiredFees, taxes,
diff --git a/x/auth/ante_test.go b/x/auth/ante_test.go
index 03d33eea9..87704de53 100644
--- a/x/auth/ante_test.go
+++ b/x/auth/ante_test.go
@@ -322,7 +322,7 @@ func TestAnteHandlerFees(t *testing.T) {
 	input.ak.SetAccount(ctx, acc1)
 	checkInvalidTx(t, anteHandler, ctx, tx, false, sdk.CodeInsufficientFunds)
 
-	require.True(t, input.sk.GetModuleAccount(ctx, types.FeeCollectorName).GetCoins().Empty())
+	require.True(t, input.sk.GetModuleAccount(ctx, types.FeeCollectorName).GetCoins().IsZero())
 	require.True(sdk.IntEq(t, input.ak.GetAccount(ctx, addr1).GetCoins().AmountOf(core.MicroSDRDenom), sdk.NewInt(999)))
 
 	acc1.SetCoins(sdk.NewCoins(sdk.NewInt64Coin(core.MicroSDRDenom, 1000)))
diff --git a/x/oracle/internal/keeper/reward.go b/x/oracle/internal/keeper/reward.go
index 29987e87d..361a4161f 100644
--- a/x/oracle/internal/keeper/reward.go
+++ b/x/oracle/internal/keeper/reward.go
@@ -27,7 +27,7 @@ func (k Keeper) RewardBallotWinners(ctx sdk.Context, ballotWinners map[string]ty
 	rewardPool := k.GetRewardPool(ctx)
 
 	// return if there's no rewards to give out
-	if rewardPool.Empty() {
+	if rewardPool.IsZero() {
 		return
 	}
 
@@ -46,7 +46,7 @@ func (k Keeper) RewardBallotWinners(ctx sdk.Context, ballotWinners map[string]ty
 		rewardCoins = append(rewardCoins, sdk.NewCoin(core.MicroLunaDenom, rewardAmt))
 
 		// In case absence of the validator, we just skip distribution
-		if rewardeeVal != nil {
+		if rewardeeVal != nil && !rewardCoins.IsZero() {
 			k.distrKeeper.AllocateTokensToValidator(ctx, rewardeeVal, sdk.NewDecCoins(rewardCoins))
 			distributedReward = distributedReward.Add(rewardCoins)
 		}
diff --git a/x/treasury/genesis.go b/x/treasury/genesis.go
index 06d582954..47592dc88 100644
--- a/x/treasury/genesis.go
+++ b/x/treasury/genesis.go
@@ -15,7 +15,7 @@ func InitGenesis(ctx sdk.Context, keeper Keeper, data GenesisState) {
 	keeper.SetEpochTaxProceeds(ctx, data.TaxProceed)
 
 	// If EpochInitialIssuance is empty, we use current supply as epoch initial issuance
-	if data.EpochInitialIssuance.Empty() {
+	if data.EpochInitialIssuance.IsZero() {
 		keeper.RecordEpochInitialIssuance(ctx)
 	} else {
 		keeper.SetEpochInitialIssuance(ctx, data.EpochInitialIssuance)
diff --git a/x/treasury/internal/keeper/keeper.go b/x/treasury/internal/keeper/keeper.go
index b73a225ab..b9626affd 100644
--- a/x/treasury/internal/keeper/keeper.go
+++ b/x/treasury/internal/keeper/keeper.go
@@ -141,7 +141,7 @@ func (k Keeper) IterateTaxCap(ctx sdk.Context, handler func(denom string, taxCap
 
 // RecordEpochTaxProceeds adds tax proceeds that have been added this epoch
 func (k Keeper) RecordEpochTaxProceeds(ctx sdk.Context, delta sdk.Coins) {
-	if delta.Empty() || delta.IsZero() {
+	if delta.IsZero() {
 		return
 	}
 
@@ -155,7 +155,7 @@ func (k Keeper) RecordEpochTaxProceeds(ctx sdk.Context, delta sdk.Coins) {
 func (k Keeper) SetEpochTaxProceeds(ctx sdk.Context, taxProceeds sdk.Coins) {
 	store := ctx.KVStore(k.storeKey)
 
-	if taxProceeds.Empty() || taxProceeds.IsZero() {
+	if taxProceeds.IsZero() {
 		store.Delete(types.TaxProceedsKey)
 	} else {
 		bz := k.cdc.MustMarshalBinaryLengthPrefixed(taxProceeds)
@@ -185,7 +185,7 @@ func (k Keeper) RecordEpochInitialIssuance(ctx sdk.Context) {
 func (k Keeper) SetEpochInitialIssuance(ctx sdk.Context, issuance sdk.Coins) {
 	store := ctx.KVStore(k.storeKey)
 
-	if issuance.Empty() || issuance.IsZero() {
+	if issuance.IsZero() {
 		store.Delete(types.EpochInitialIssuanceKey)
 	} else {
 		bz := k.cdc.MustMarshalBinaryLengthPrefixed(issuance)