feat: add --qrcode flag to keys show command

client/keys/show.go

@@ -4,6 +4,7 @@ import (
 	"errors"
 	"fmt"
 
+	"github.com/mdp/qrterminal/v3"
 	"github.com/spf13/cobra"
 
 	"cosmossdk.io/core/address"
@@ -30,6 +31,7 @@ const (
 	FlagDevice = "device"
 
 	flagMultiSigThreshold = "multisig-threshold"
+	flagQRCode            = "qrcode"
 )
 
 // ShowKeysCmd shows key information for a given key name.
@@ -49,6 +51,7 @@ consisting of all the keys provided by name and multisig threshold.`,
 	f.BoolP(FlagPublicKey, "p", false, "Output the public key only (overrides --output)")
 	f.BoolP(FlagDevice, "d", false, "Output the address in a ledger device")
 	f.Int(flagMultiSigThreshold, 1, "K out of N required signatures")
+	f.Bool(flagQRCode, false, "Display keys payment QR code, will be ignored if -a or --address is false")
 
 	return cmd
 }
@@ -96,6 +99,7 @@ func runShowCmd(cmd *cobra.Command, args []string) (err error) {
 	isShowAddr, _ := cmd.Flags().GetBool(FlagAddress)
 	isShowPubKey, _ := cmd.Flags().GetBool(FlagPublicKey)
 	isShowDevice, _ := cmd.Flags().GetBool(FlagDevice)
+	isShowQRCode, _ := cmd.Flags().GetBool(flagQRCode)
 
 	isOutputSet := false
 	tmp := cmd.Flag(flags.FlagOutput)
@@ -126,6 +130,8 @@ func runShowCmd(cmd *cobra.Command, args []string) (err error) {
 		out := ko.Address
 		if isShowPubKey {
 			out = ko.PubKey
+		} else if isShowQRCode {
+			qrterminal.GenerateHalfBlock(out, qrterminal.H, cmd.OutOrStdout())
 		}
 
 		if _, err := fmt.Fprintln(cmd.OutOrStdout(), out); err != nil {

client/keys/show_test.go

@@ -174,6 +174,21 @@ func Test_runShowCmd(t *testing.T) {
 		fmt.Sprintf("--%s=%s", flags.FlagKeyringBackend, keyring.BackendTest),
 	})
 	require.EqualError(t, cmd.ExecuteContext(ctx), "the device flag (-d) can only be used for addresses not pubkeys")
+
+	cmd.SetArgs([]string{
+		fakeKeyName1,
+		fmt.Sprintf("--%s=%s", flags.FlagKeyringDir, kbHome),
+		fmt.Sprintf("--%s=true", FlagAddress),
+		fmt.Sprintf("--%s=true", flagQRCode),
+		// we have to reset following flags as they were set to true above, and won't be auto reset to false if we skip to specify these flags.
+		// Note: this maybe a bug about spf13/cobra as cmd.flags's value' won't be reset by changing cmd.args with cmd.SetArgs.
+		fmt.Sprintf("--%s=false", FlagDevice),
+		fmt.Sprintf("--%s=false", FlagPublicKey),
+		fmt.Sprintf("--%s=%s", flags.FlagKeyringBackend, keyring.BackendTest),
+	})
+
+	// try fetch by name
+	require.NoError(t, cmd.ExecuteContext(ctx))
 }
 
 func Test_validateMultisigThreshold(t *testing.T) {

go.mod

@@ -42,6 +42,7 @@ require (
 	github.com/improbable-eng/grpc-web v0.15.0
 	github.com/magiconair/properties v1.8.7
 	github.com/mattn/go-isatty v0.0.20
+	github.com/mdp/qrterminal/v3 v3.2.0
 	github.com/prometheus/client_golang v1.17.0
 	github.com/prometheus/common v0.45.0
 	github.com/rs/zerolog v1.31.0
@@ -157,6 +158,7 @@ require (
 	gopkg.in/ini.v1 v1.67.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 	nhooyr.io/websocket v1.8.6 // indirect
+	rsc.io/qr v0.2.0 // indirect
 )
 
 // Here are the short-lived replace from the Cosmos SDK

go.sum

@@ -549,6 +549,8 @@ github.com/mattn/go-runewidth v0.0.2/go.mod h1:LwmH8dsx7+W8Uxz3IHJYH5QSwggIsqBzp
 github.com/matttproud/golang_protobuf_extensions v1.0.1/go.mod h1:D8He9yQNgCq6Z5Ld7szi9bcBfOoFv/3dc6xSMkL2PC0=
 github.com/matttproud/golang_protobuf_extensions/v2 v2.0.0 h1:jWpvCLoY8Z/e3VKvlsiIGKtc+UG6U5vzxaoagmhXfyg=
 github.com/matttproud/golang_protobuf_extensions/v2 v2.0.0/go.mod h1:QUyp042oQthUoa9bqDv0ER0wrtXnBruoNd7aNjkbP+k=
+github.com/mdp/qrterminal/v3 v3.2.0 h1:qteQMXO3oyTK4IHwj2mWsKYYRBOp1Pj2WRYFYYNTCdk=
+github.com/mdp/qrterminal/v3 v3.2.0/go.mod h1:XGGuua4Lefrl7TLEsSONiD+UEjQXJZ4mPzF+gWYIJkk=
 github.com/miekg/dns v1.0.14/go.mod h1:W1PPwlIAgtquWBMBEV9nkV9Cazfe8ScdGz/Lj7v3Nrg=
 github.com/minio/highwayhash v1.0.2 h1:Aak5U0nElisjDCfPSG79Tgzkn2gl66NxOMspRrKnA/g=
 github.com/minio/highwayhash v1.0.2/go.mod h1:BQskDq+xkJ12lmlUUi7U0M5Swg3EWR+dLTk+kldvVxY=
@@ -1297,6 +1299,8 @@ pgregory.net/rapid v1.1.0 h1:CMa0sjHSru3puNx+J0MIAuiiEV4N0qj8/cMWGBBCsjw=
 pgregory.net/rapid v1.1.0/go.mod h1:PY5XlDGj0+V1FCq0o192FdRhpKHGTRIWBgqjDBTrq04=
 rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=
 rsc.io/pdf v0.1.1/go.mod h1:n8OzWcQ6Sp37PL01nO98y4iUCRdTGarVfzxY20ICaU4=
+rsc.io/qr v0.2.0 h1:6vBLea5/NRMVTz8V66gipeLycZMl/+UlFmk8DvqQ6WY=
+rsc.io/qr v0.2.0/go.mod h1:IF+uZjkb9fqyeF/4tlBoynqmQxUoPfWEKh921coOuXs=
 rsc.io/quote/v3 v3.1.0/go.mod h1:yEA65RcK8LyAZtP9Kv3t0HmxON59tX3rD+tICJqUlj0=
 rsc.io/sampler v1.3.0/go.mod h1:T1hPZKmBbMNahiBKFy5HrXp6adAjACjK9JXDnKaTXpA=
 sigs.k8s.io/yaml v1.1.0/go.mod h1:UJmg0vDUVViEyp3mgSv9WPwZCDxu4rQW1olrI1uml+o=

testutil/ioutil.go

@@ -44,7 +44,7 @@ func ApplyMockIODiscardOutErr(c *cobra.Command) BufferReader {
 	mockIn := strings.NewReader("")
 
 	c.SetIn(mockIn)
-	c.SetOut(io.Discard)
+	//c.SetOut(io.Discard)
 	c.SetErr(io.Discard)
 
 	return mockIn