feat: ADR-008: Change the plain text encoding of links to hex (#652)

## Description

This PR implements what's described inside [ADR-008](#642).
Closes: #636

<!-- Add a description of the changes that this PR introduces and the files that
are the most critical to review. -->

---

### 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...

- [x] 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
- [x] targeted the correct branch (see [PR Targeting](https://github.com/desmos-labs/desmos/blob/master/CONTRIBUTING.md#pr-targeting))
- [ ] provided a link to the relevant issue or specification
- [ ] followed the guidelines for [building modules](https://docs.cosmos.network/v0.44/building-modules/intro.html)
- [ ] included the necessary unit and integration [tests](https://github.com/desmos-labs/desmos/blob/master/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)

.changeset/entries/ffc3d0026ae324f3a3a5bbfaeac4056e894dca906008a632a7e74a6cc5119407.yaml

@@ -0,0 +1,6 @@
+type: feat
+module: x/profiles
+pull_request: 652
+description: Change the plain text encoding of links to hex
+backward_compatible: true
+date: 2021-10-15T07:15:41.3678891Z

app/desmos/cmd/chainlink/create_json.go

@@ -86,14 +86,15 @@ func generateChainLinkJSON(mnemonic string, chain chainlinktypes.Chain) (profile
 	// Generate the proof signing it with the key
 	key, _ := keyBase.Key(keyName)
 	addr, _ := sdk.Bech32ifyAddressBytes(chain.Prefix, key.GetAddress())
-	sig, pubkey, err := keyBase.Sign(keyName, []byte(addr))
+	value := []byte(addr)
+	sig, pubkey, err := keyBase.Sign(keyName, value)
 	if err != nil {
 		return profilescliutils.ChainLinkJSON{}, err
 	}
 
 	return profilescliutils.NewChainLinkJSON(
 		profilestypes.NewBech32Address(addr, chain.Prefix),
-		profilestypes.NewProof(pubkey, hex.EncodeToString(sig), addr),
+		profilestypes.NewProof(pubkey, hex.EncodeToString(sig), hex.EncodeToString(value)),
 		profilestypes.NewChainConfig(chain.Name),
 	), nil
 }

app/desmos/cmd/chainlink/create_json_test.go

@@ -87,7 +87,7 @@ func TestGetCreateChainLinkJSON(t *testing.T) {
 		profilestypes.NewProof(
 			key.GetPubKey(),
 			"c3bd014b2178d63d94b9c28e628bfcf56736de28f352841b0bb27d6fff2968d62c13a10aeddd1ebfe3b13f3f8e61f79a2c63ae6ff5cb78cb0d64e6b0a70fae57",
-			"cosmos13j7p6faa9jr8ty6lvqv0prldprr6m5xenmafnt"),
+			"636f736d6f7331336a377036666161396a72387479366c7671763070726c64707272366d3578656e6d61666e74"),
 		profilestypes.NewChainConfig("cosmos"),
 	)
 

app/desmos/cmd/sign/sign.go

@@ -46,8 +46,8 @@ func GetSignCmd() *cobra.Command {
 			}
 
 			// Sign the data with the private key
-			value := args[0]
-			bz, pubKey, err := txFactory.Keybase().Sign(key.GetName(), []byte(value))
+			value := []byte(args[0])
+			bz, pubKey, err := txFactory.Keybase().Sign(key.GetName(), value)
 			if err != nil {
 				return err
 			}
@@ -57,7 +57,7 @@ func GetSignCmd() *cobra.Command {
 				Address:   strings.ToLower(pubKey.Address().String()),
 				Signature: strings.ToLower(hex.EncodeToString(bz)),
 				PubKey:    strings.ToLower(hex.EncodeToString(pubKey.Bytes())),
-				Value:     value,
+				Value:     hex.EncodeToString(value),
 			}
 
 			// Serialize the output as JSON and print it

app/desmos/cmd/sign/sign_test.go

@@ -51,7 +51,7 @@ func TestGetSignCmd(t *testing.T) {
 		Address:   "8cbc1d27bd2c8675935f6018f08fed08c7add0d9",
 		PubKey:    "0235088ee6a12267eda6410028706c4ec192b1ce04a298def8dad1c146257012eb",
 		Signature: "39cc04208d25e445a46bd6853cfa7b1b295961bc43d6facf387f4bd9c0c4647163ef2e296f49e307cdb657a7acdf4e2ee56e9bbf1f9723113385f4dd3601061e",
-		Value:     "This is my signed value",
+		Value:     "54686973206973206d79207369676e65642076616c7565",
 	}
 	require.Equal(t, expected, data)
 

x/profiles/client/cli/cli_chain_links.go

@@ -42,7 +42,7 @@ Where data.json contains:
          "key":"A58DXR/lXKVkIjLofXgST/OHi+pkOQbVIiOjnTy7Zoqo"
       },
       "signature":"ecc6175e730917fb289d3a9f4e49a5630a44b42d972f481342f540e09def2ec5169780d85c4e060d52cc3ffb3d677745a4d56cd385760735bc6db0f1816713be",
-      "plain_text":"cosmos15uc89vnzufu5kuhhsxdkltt38zfx8vcyggzwfm"
+      "plain_text":"636f736d6f73313575633839766e7a756675356b7568687378646b6c747433387a66783876637967677a77666d"
    },
    "chain_config":{
       "name":"cosmos"

x/profiles/client/cli/cli_chain_links_test.go

@@ -44,7 +44,7 @@ func (s *IntegrationTestSuite) TestCmdQueryChainLinks() {
 						types.NewProof(
 							pubKey,
 							"909e38994b1583d3f14384c2e9a03c90064e8fd8e19b780bb0ba303dfe671a27287da04d0ce096ce9a140bd070ee36818f5519eb2070a16971efd8143855524b",
-							"text",
+							"74657874",
 						),
 						types.NewChainConfig("cosmos"),
 						time.Date(2019, 1, 1, 00, 00, 00, 000, time.UTC),
@@ -55,7 +55,7 @@ func (s *IntegrationTestSuite) TestCmdQueryChainLinks() {
 						types.NewProof(
 							pubKey,
 							"909e38994b1583d3f14384c2e9a03c90064e8fd8e19b780bb0ba303dfe671a27287da04d0ce096ce9a140bd070ee36818f5519eb2070a16971efd8143855524b",
-							"text",
+							"74657874",
 						),
 						types.NewChainConfig("cosmos"),
 						time.Date(2019, 1, 1, 00, 00, 00, 000, time.UTC),
@@ -97,7 +97,7 @@ func (s *IntegrationTestSuite) TestCmdQueryChainLinks() {
 						types.NewProof(
 							pubKey,
 							"909e38994b1583d3f14384c2e9a03c90064e8fd8e19b780bb0ba303dfe671a27287da04d0ce096ce9a140bd070ee36818f5519eb2070a16971efd8143855524b",
-							"text",
+							"74657874",
 						),
 						types.NewChainConfig("cosmos"),
 						time.Date(2019, 1, 1, 00, 00, 00, 000, time.UTC),
@@ -108,7 +108,7 @@ func (s *IntegrationTestSuite) TestCmdQueryChainLinks() {
 						types.NewProof(
 							pubKey,
 							"909e38994b1583d3f14384c2e9a03c90064e8fd8e19b780bb0ba303dfe671a27287da04d0ce096ce9a140bd070ee36818f5519eb2070a16971efd8143855524b",
-							"text",
+							"74657874",
 						),
 						types.NewChainConfig("cosmos"),
 						time.Date(2019, 1, 1, 00, 00, 00, 000, time.UTC),

x/profiles/client/cli/cli_test.go

@@ -164,7 +164,7 @@ func (s *IntegrationTestSuite) SetupSuite() {
 			types.NewProof(
 				pubKey,
 				"909e38994b1583d3f14384c2e9a03c90064e8fd8e19b780bb0ba303dfe671a27287da04d0ce096ce9a140bd070ee36818f5519eb2070a16971efd8143855524b",
-				"text",
+				"74657874",
 			),
 			types.NewChainConfig("cosmos"),
 			time.Date(2019, 1, 1, 00, 00, 00, 000, time.UTC),
@@ -226,7 +226,7 @@ func (s *IntegrationTestSuite) writeChainLinkJSONFile(filePath string) {
 
 	jsonData := utils.NewChainLinkJSON(
 		types.NewBech32Address(addStr, "cosmos"),
-		types.NewProof(srcKey.PubKey(), hex.EncodeToString(sigBz), plainText),
+		types.NewProof(srcKey.PubKey(), hex.EncodeToString(sigBz), hex.EncodeToString([]byte(plainText))),
 		types.NewChainConfig("cosmos"),
 	)
 

x/profiles/keeper/genesis_test.go

@@ -111,7 +111,7 @@ func (suite *KeeperTestSuite) Test_ExportGenesis() {
 						types.NewProof(
 							testutil.PubKeyFromBech32("cosmospub1addwnpepqvryxhhqhw52c4ny5twtfzf3fsrjqhx0x5cuya0fylw0wu0eqptykeqhr4d"),
 							"909e38994b1583d3f14384c2e9a03c90064e8fd8e19b780bb0ba303dfe671a27287da04d0ce096ce9a140bd070ee36818f5519eb2070a16971efd8143855524b",
-							"text",
+							"74657874",
 						),
 						types.NewChainConfig("cosmos"),
 						time.Date(2019, 1, 1, 00, 00, 00, 000, time.UTC),
@@ -194,7 +194,7 @@ func (suite *KeeperTestSuite) Test_ExportGenesis() {
 						types.NewProof(
 							testutil.PubKeyFromBech32("cosmospub1addwnpepqvryxhhqhw52c4ny5twtfzf3fsrjqhx0x5cuya0fylw0wu0eqptykeqhr4d"),
 							"909e38994b1583d3f14384c2e9a03c90064e8fd8e19b780bb0ba303dfe671a27287da04d0ce096ce9a140bd070ee36818f5519eb2070a16971efd8143855524b",
-							"text",
+							"74657874",
 						),
 						types.NewChainConfig("cosmos"),
 						time.Date(2019, 1, 1, 00, 00, 00, 000, time.UTC),
@@ -307,14 +307,14 @@ func (suite *KeeperTestSuite) Test_InitGenesis() {
 					types.NewChainLink(
 						"cosmos1y54exmx84cqtasvjnskf9f63djuuj68p7hqf47",
 						types.NewBech32Address(ext.GetAddress().String(), "cosmos"),
-						types.NewProof(ext.GetPubKey(), hex.EncodeToString(ext.Sign(ext.GetAddress())), ext.GetAddress().String()),
+						types.NewProof(ext.GetPubKey(), hex.EncodeToString(ext.Sign(ext.GetAddress())), hex.EncodeToString([]byte(ext.GetAddress().String()))),
 						types.NewChainConfig("cosmos"),
 						time.Date(2020, 1, 2, 00, 00, 00, 000, time.UTC),
 					),
 					types.NewChainLink(
 						"cosmos1y54exmx84cqtasvjnskf9f63djuuj68p7hqf47",
 						types.NewBech32Address(ext.GetAddress().String(), "cosmos"),
-						types.NewProof(ext.GetPubKey(), hex.EncodeToString(ext.Sign(ext.GetAddress())), ext.GetAddress().String()),
+						types.NewProof(ext.GetPubKey(), hex.EncodeToString(ext.Sign(ext.GetAddress())), hex.EncodeToString([]byte(ext.GetAddress().String()))),
 						types.NewChainConfig("cosmos"),
 						time.Date(2020, 1, 2, 00, 00, 00, 000, time.UTC),
 					),
@@ -394,7 +394,7 @@ func (suite *KeeperTestSuite) Test_InitGenesis() {
 						types.NewProof(
 							ext.GetPubKey(),
 							hex.EncodeToString(ext.Sign([]byte(ext.GetAddress().String()))),
-							ext.GetAddress().String(),
+							hex.EncodeToString([]byte(ext.GetAddress().String())),
 						),
 						types.NewChainConfig("cosmos"),
 						time.Date(2020, 1, 2, 00, 00, 00, 000, time.UTC),
@@ -478,7 +478,7 @@ func (suite *KeeperTestSuite) Test_InitGenesis() {
 						types.NewProof(
 							ext.GetPubKey(),
 							hex.EncodeToString(ext.Sign([]byte(ext.GetAddress().String()))),
-							ext.GetAddress().String(),
+							hex.EncodeToString([]byte(ext.GetAddress().String())),
 						),
 						types.NewChainConfig("cosmos"),
 						time.Date(2020, 1, 2, 00, 00, 00, 000, time.UTC),

x/profiles/keeper/grpc_query_test.go

@@ -215,7 +215,7 @@ func (suite *KeeperTestSuite) TestQueryServer_ChainLinks() {
 					types.NewProof(
 						testutil.PubKeyFromBech32("cosmospub1addwnpepqvryxhhqhw52c4ny5twtfzf3fsrjqhx0x5cuya0fylw0wu0eqptykeqhr4d"),
 						"909e38994b1583d3f14384c2e9a03c90064e8fd8e19b780bb0ba303dfe671a27287da04d0ce096ce9a140bd070ee36818f5519eb2070a16971efd8143855524b",
-						"text",
+						"74657874",
 					),
 					types.NewChainConfig("cosmos"),
 					time.Date(2020, 1, 1, 00, 00, 00, 000, time.UTC),
@@ -231,7 +231,7 @@ func (suite *KeeperTestSuite) TestQueryServer_ChainLinks() {
 					types.NewProof(
 						testutil.PubKeyFromBech32("cosmospub1addwnpepqvryxhhqhw52c4ny5twtfzf3fsrjqhx0x5cuya0fylw0wu0eqptykeqhr4d"),
 						"909e38994b1583d3f14384c2e9a03c90064e8fd8e19b780bb0ba303dfe671a27287da04d0ce096ce9a140bd070ee36818f5519eb2070a16971efd8143855524b",
-						"text",
+						"74657874",
 					),
 					types.NewChainConfig("cosmos"),
 					time.Date(2020, 1, 1, 00, 00, 00, 000, time.UTC),
@@ -252,7 +252,7 @@ func (suite *KeeperTestSuite) TestQueryServer_ChainLinks() {
 					types.NewProof(
 						testutil.PubKeyFromBech32("cosmospub1addwnpepqvryxhhqhw52c4ny5twtfzf3fsrjqhx0x5cuya0fylw0wu0eqptykeqhr4d"),
 						"909e38994b1583d3f14384c2e9a03c90064e8fd8e19b780bb0ba303dfe671a27287da04d0ce096ce9a140bd070ee36818f5519eb2070a16971efd8143855524b",
-						"text",
+						"74657874",
 					),
 					types.NewChainConfig("cosmos"),
 					time.Date(2020, 1, 1, 00, 00, 00, 000, time.UTC),
@@ -263,7 +263,7 @@ func (suite *KeeperTestSuite) TestQueryServer_ChainLinks() {
 					types.NewProof(
 						testutil.PubKeyFromBech32("cosmospub1addwnpepqvryxhhqhw52c4ny5twtfzf3fsrjqhx0x5cuya0fylw0wu0eqptykeqhr4d"),
 						"909e38994b1583d3f14384c2e9a03c90064e8fd8e19b780bb0ba303dfe671a27287da04d0ce096ce9a140bd070ee36818f5519eb2070a16971efd8143855524b",
-						"text",
+						"74657874",
 					),
 					types.NewChainConfig("cosmos"),
 					time.Date(2020, 1, 1, 00, 00, 00, 000, time.UTC),
@@ -281,7 +281,7 @@ func (suite *KeeperTestSuite) TestQueryServer_ChainLinks() {
 					types.NewProof(
 						testutil.PubKeyFromBech32("cosmospub1addwnpepqvryxhhqhw52c4ny5twtfzf3fsrjqhx0x5cuya0fylw0wu0eqptykeqhr4d"),
 						"909e38994b1583d3f14384c2e9a03c90064e8fd8e19b780bb0ba303dfe671a27287da04d0ce096ce9a140bd070ee36818f5519eb2070a16971efd8143855524b",
-						"text",
+						"74657874",
 					),
 					types.NewChainConfig("cosmos"),
 					time.Date(2020, 1, 1, 00, 00, 00, 000, time.UTC),
@@ -297,7 +297,7 @@ func (suite *KeeperTestSuite) TestQueryServer_ChainLinks() {
 					types.NewProof(
 						testutil.PubKeyFromBech32("cosmospub1addwnpepqvryxhhqhw52c4ny5twtfzf3fsrjqhx0x5cuya0fylw0wu0eqptykeqhr4d"),
 						"909e38994b1583d3f14384c2e9a03c90064e8fd8e19b780bb0ba303dfe671a27287da04d0ce096ce9a140bd070ee36818f5519eb2070a16971efd8143855524b",
-						"text",
+						"74657874",
 					),
 					types.NewChainConfig("cosmos"),
 					time.Date(2020, 1, 1, 00, 00, 00, 000, time.UTC),
@@ -319,7 +319,7 @@ func (suite *KeeperTestSuite) TestQueryServer_ChainLinks() {
 					types.NewProof(
 						testutil.PubKeyFromBech32("cosmospub1addwnpepqvryxhhqhw52c4ny5twtfzf3fsrjqhx0x5cuya0fylw0wu0eqptykeqhr4d"),
 						"909e38994b1583d3f14384c2e9a03c90064e8fd8e19b780bb0ba303dfe671a27287da04d0ce096ce9a140bd070ee36818f5519eb2070a16971efd8143855524b",
-						"text",
+						"74657874",
 					),
 					types.NewChainConfig("cosmos"),
 					time.Date(2020, 1, 1, 00, 00, 00, 000, time.UTC),
@@ -378,7 +378,7 @@ func (suite *KeeperTestSuite) TestQueryServer_UserChainLink() {
 					types.NewProof(
 						testutil.PubKeyFromBech32("cosmospub1addwnpepqvryxhhqhw52c4ny5twtfzf3fsrjqhx0x5cuya0fylw0wu0eqptykeqhr4d"),
 						"909e38994b1583d3f14384c2e9a03c90064e8fd8e19b780bb0ba303dfe671a27287da04d0ce096ce9a140bd070ee36818f5519eb2070a16971efd8143855524b",
-						"text",
+						"74657874",
 					),
 					types.NewChainConfig("cosmos"),
 					time.Date(2020, 1, 1, 00, 00, 00, 000, time.UTC),
@@ -398,7 +398,7 @@ func (suite *KeeperTestSuite) TestQueryServer_UserChainLink() {
 					types.NewProof(
 						testutil.PubKeyFromBech32("cosmospub1addwnpepqvryxhhqhw52c4ny5twtfzf3fsrjqhx0x5cuya0fylw0wu0eqptykeqhr4d"),
 						"909e38994b1583d3f14384c2e9a03c90064e8fd8e19b780bb0ba303dfe671a27287da04d0ce096ce9a140bd070ee36818f5519eb2070a16971efd8143855524b",
-						"text",
+						"74657874",
 					),
 					types.NewChainConfig("cosmos"),
 					time.Date(2020, 1, 1, 00, 00, 00, 000, time.UTC),

x/profiles/keeper/keeper_chain_links_test.go

@@ -19,6 +19,7 @@ func (suite *KeeperTestSuite) TestKeeper_StoreChainLink() {
 	// Generate source and destination key
 	ext := suite.GetRandomProfile()
 	sig := hex.EncodeToString(ext.Sign([]byte(ext.GetAddress().String())))
+	plainText := hex.EncodeToString([]byte(ext.GetAddress().String()))
 
 	testCases := []struct {
 		name      string
@@ -31,7 +32,7 @@ func (suite *KeeperTestSuite) TestKeeper_StoreChainLink() {
 			name: "invalid chain address packed value returns error",
 			link: types.ChainLink{
 				Address:      testutil.NewAny(ext.privKey),
-				Proof:        types.NewProof(ext.GetPubKey(), sig, ext.GetAddress().String()),
+				Proof:        types.NewProof(ext.GetPubKey(), sig, plainText),
 				ChainConfig:  types.NewChainConfig("cosmos"),
 				CreationTime: time.Date(2021, 1, 1, 00, 00, 00, 000, time.UTC),
 			},
@@ -42,7 +43,7 @@ func (suite *KeeperTestSuite) TestKeeper_StoreChainLink() {
 			link: types.NewChainLink(
 				"cosmos19xz3mrvzvp9ymgmudhpukucg6668l5haakh04x",
 				types.NewBech32Address("", "cosmos"),
-				types.NewProof(ext.GetPubKey(), sig, ext.GetAddress().String()),
+				types.NewProof(ext.GetPubKey(), sig, plainText),
 				types.NewChainConfig("cosmos"),
 				time.Date(2021, 1, 1, 00, 00, 00, 000, time.UTC),
 			),
@@ -69,7 +70,7 @@ func (suite *KeeperTestSuite) TestKeeper_StoreChainLink() {
 				link := types.NewChainLink(
 					address,
 					types.NewBech32Address(ext.GetAddress().String(), "cosmos"),
-					types.NewProof(ext.GetPubKey(), sig, ext.GetAddress().String()),
+					types.NewProof(ext.GetPubKey(), sig, plainText),
 					types.NewChainConfig("cosmos"),
 					time.Date(2020, 1, 2, 00, 00, 00, 000, time.UTC),
 				)
@@ -78,7 +79,7 @@ func (suite *KeeperTestSuite) TestKeeper_StoreChainLink() {
 			link: types.NewChainLink(
 				"cosmos19xz3mrvzvp9ymgmudhpukucg6668l5haakh04x",
 				types.NewBech32Address(ext.GetAddress().String(), "cosmos"),
-				types.NewProof(ext.GetPubKey(), sig, ext.GetAddress().String()),
+				types.NewProof(ext.GetPubKey(), sig, plainText),
 				types.NewChainConfig("cosmos"),
 				time.Date(2020, 1, 2, 00, 00, 00, 000, time.UTC),
 			),
@@ -89,7 +90,7 @@ func (suite *KeeperTestSuite) TestKeeper_StoreChainLink() {
 				suite.Require().Contains(links, types.NewChainLink(
 					"cosmos19xz3mrvzvp9ymgmudhpukucg6668l5haakh04x",
 					types.NewBech32Address(ext.GetAddress().String(), "cosmos"),
-					types.NewProof(ext.GetPubKey(), sig, ext.GetAddress().String()),
+					types.NewProof(ext.GetPubKey(), sig, plainText),
 					types.NewChainConfig("cosmos"),
 					time.Date(2020, 1, 2, 00, 00, 00, 000, time.UTC),
 				))
@@ -100,7 +101,7 @@ func (suite *KeeperTestSuite) TestKeeper_StoreChainLink() {
 			link: types.NewChainLink(
 				"",
 				types.NewBech32Address(ext.GetAddress().String(), "cosmos"),
-				types.NewProof(ext.GetPubKey(), sig, ext.GetAddress().String()),
+				types.NewProof(ext.GetPubKey(), sig, plainText),
 				types.NewChainConfig("cosmos"),
 				time.Date(2020, 1, 2, 00, 00, 00, 000, time.UTC),
 			),
@@ -111,7 +112,7 @@ func (suite *KeeperTestSuite) TestKeeper_StoreChainLink() {
 			link: types.NewChainLink(
 				"cosmos19xz3mrvzvp9ymgmudhpukucg6668l5haakh04x",
 				types.NewBech32Address(ext.GetAddress().String(), "cosmos"),
-				types.NewProof(ext.GetPubKey(), sig, ext.GetAddress().String()),
+				types.NewProof(ext.GetPubKey(), sig, plainText),
 				types.NewChainConfig("cosmos"),
 				time.Date(2020, 1, 2, 00, 00, 00, 000, time.UTC),
 			),
@@ -127,7 +128,7 @@ func (suite *KeeperTestSuite) TestKeeper_StoreChainLink() {
 			link: types.NewChainLink(
 				"cosmos19xz3mrvzvp9ymgmudhpukucg6668l5haakh04x",
 				types.NewBech32Address(ext.GetAddress().String(), "cosmos"),
-				types.NewProof(ext.GetPubKey(), sig, ext.GetAddress().String()),
+				types.NewProof(ext.GetPubKey(), sig, plainText),
 				types.NewChainConfig("cosmos"),
 				time.Date(2020, 1, 2, 00, 00, 00, 000, time.UTC),
 			),
@@ -138,7 +139,7 @@ func (suite *KeeperTestSuite) TestKeeper_StoreChainLink() {
 				suite.Require().Contains(links, types.NewChainLink(
 					"cosmos19xz3mrvzvp9ymgmudhpukucg6668l5haakh04x",
 					types.NewBech32Address(ext.GetAddress().String(), "cosmos"),
-					types.NewProof(ext.GetPubKey(), sig, ext.GetAddress().String()),
+					types.NewProof(ext.GetPubKey(), sig, plainText),
 					types.NewChainConfig("cosmos"),
 					time.Date(2020, 1, 2, 00, 00, 00, 000, time.UTC),
 				))
@@ -191,7 +192,7 @@ func (suite *KeeperTestSuite) TestKeeper_GetChainLink() {
 				link := types.NewChainLink(
 					"cosmos1y54exmx84cqtasvjnskf9f63djuuj68p7hqf47",
 					types.NewBech32Address("cosmos1cjf97gpzwmaf30pzvaargfgr884mpp5ak8f7ns", "cosmos"),
-					types.NewProof(secp256k1.GenPrivKey().PubKey(), "signature", "plain_text"),
+					types.NewProof(secp256k1.GenPrivKey().PubKey(), "signature", "706c61696e5f74657874"),
 					types.NewChainConfig("cosmos"),
 					time.Date(2020, 1, 2, 00, 00, 00, 000, time.UTC),
 				)
@@ -335,7 +336,7 @@ func (suite *KeeperTestSuite) TestKeeper_DeleteAllUserChainLinks() {
 				link := types.NewChainLink(
 					user,
 					types.NewBech32Address("cosmos10nsdxxdvy9qka3zv0lzw8z9cnu6kanld8jh773", "cosmos"),
-					types.NewProof(key, "signature", "plain text"),
+					types.NewProof(key, "signature", "706c61696e74657874"),
 					types.NewChainConfig("cosmos"),
 					time.Date(2021, 1, 1, 00, 00, 00, 000, time.UTC),
 				)
@@ -347,7 +348,7 @@ func (suite *KeeperTestSuite) TestKeeper_DeleteAllUserChainLinks() {
 				link = types.NewChainLink(
 					user,
 					types.NewBech32Address("cosmos1xcy3els9ua75kdm783c3qu0rfa2eplesldfevn", "cosmos"),
-					types.NewProof(key, "signature", "plain text"),
+					types.NewProof(key, "signature", "706c61696e74657874"),
 					types.NewChainConfig("cosmos"),
 					time.Date(2021, 1, 1, 00, 00, 00, 000, time.UTC),
 				)