feat!: support for metaprotocol types

.dockerignore

@@ -0,0 +1,4 @@
+node_modules
+build
+.github
+.vscode

app/modules.go

@@ -57,6 +57,8 @@ import (
 
 	gaiaappparams "github.com/cosmos/gaia/v15/app/params"
 	"github.com/cosmos/gaia/v15/x/globalfee"
+	"github.com/cosmos/gaia/v15/x/metaprotocols"
+	metaprotocolstypes "github.com/cosmos/gaia/v15/x/metaprotocols/types"
 )
 
 var maccPerms = map[string][]string{
@@ -111,6 +113,7 @@ var ModuleBasics = module.NewBasicManager(
 	globalfee.AppModule{},
 	icsprovider.AppModuleBasic{},
 	consensus.AppModuleBasic{},
+	metaprotocols.AppModuleBasic{},
 )
 
 func appModules(
@@ -149,6 +152,7 @@ func appModules(
 		app.ICAModule,
 		app.PFMRouterModule,
 		app.ProviderModule,
+		metaprotocols.NewAppModule(),
 	}
 }
 
@@ -219,6 +223,7 @@ func orderBeginBlockers() []string {
 		globalfee.ModuleName,
 		providertypes.ModuleName,
 		consensusparamtypes.ModuleName,
+		metaprotocolstypes.ModuleName,
 	}
 }
 
@@ -255,6 +260,7 @@ func orderEndBlockers() []string {
 		globalfee.ModuleName,
 		providertypes.ModuleName,
 		consensusparamtypes.ModuleName,
+		metaprotocolstypes.ModuleName,
 	}
 }
 
@@ -299,5 +305,6 @@ func orderInitBlockers() []string {
 		globalfee.ModuleName,
 		providertypes.ModuleName,
 		consensusparamtypes.ModuleName,
+		metaprotocolstypes.ModuleName,
 	}
 }

docs/docs/metaprotocols/README.md

@@ -0,0 +1,71 @@
+---
+title: Metaprotocol Support
+order: false
+parent:
+  order: 2
+---
+
+The `x/metaprotocol` module adds support for encoding and decoding additional fields attached to transactions.
+
+`extension_options` and `non_critical_extension_options` are optional fields that can be used to attach data to valid transactions. The fields are validated by the blockchain, but they are not used in any way. The fields pass validation if they are provided as empty lists (`[ ]`) or they use a list of `ExtensionData` types.
+
+The application does not use the attached data but it does ensure that the correct type is provided and that it can be successfully unmarshalled. The attached data will be part of a block.
+
+:::tip
+Txs where `extension_options` or `non_critical_extension_options` are populated with a type other than `/gaia.metaprotocols.ExtensionData` are considered invalid and will be rejected.
+:::
+
+Here is an example of a correctly formed `non_critical_extension_options` field:
+
+```json
+{
+  "@type": "/gaia.metaprotocols.ExtensionData", // must be this exact string
+  "protocol_id": "some-protocol",
+  "protocol_version": "1",
+  "data": "<base64 encoded bytes>"
+}
+```
+
+Here is an example of a correctly populated `non_critical_extension_options` on a `bank.MsgSend` transaction:
+
+```json
+{
+  "body": {
+    "messages": [
+      {
+        "@type": "/cosmos.bank.v1beta1.MsgSend",
+        "from_address": "cosmos1ehpqg9sj09037uhe56sqktk30asn47asthyr22",
+        "to_address": "cosmos1ehpqg9sj09037uhe56sqktk30asn47asthyr22",
+        "amount": [
+          {
+            "denom": "uatom",
+            "amount": "100"
+          }
+        ]
+      }
+    ],
+    "memo": "memo_smaller_than_512_bytes",
+    "timeout_height": "0",
+    "extension_options": [],
+    "non_critical_extension_options": [
+      {
+        "@type": "/gaia.metaprotocols.ExtensionData",
+        "protocol_id": "some-protocol",
+        "protocol_version": "1",
+        "data": "<base64 encoded bytes>"
+      }
+    ]
+  },
+  "auth_info": {
+    "signer_infos": [],
+    "fee": {
+      "amount": [],
+      "gas_limit": "200000",
+      "payer": "",
+      "granter": ""
+    },
+    "tip": null
+  },
+  "signatures": []
+}
+```

docs/docs/metaprotocols/_category_.json

@@ -0,0 +1,5 @@
+{
+    "label": "Metaprotocol support",
+    "position": 15,
+    "link": { "type": "doc", "id": "metaprotocols/README" }
+}

proto/gaia/metaprotocols/extensions.proto

@@ -0,0 +1,19 @@
+syntax = "proto3";
+package gaia.metaprotocols;
+
+option go_package = "github.com/cosmos/gaia/x/metaprotocols/types";
+
+// ExtensionData is a data structure that can be used in transaction extensions.
+message ExtensionData {
+    // protocol_id is the identifier of the protocol
+    // the field is not used internally but it is validated for correctness
+    string protocol_id = 1;
+
+    // protocol_version is the identifier of the protocol version
+    // the field is not used internally but it is validated for correctness
+    string protocol_version = 2;
+
+    // arbitrary bytes data that can be used to store any data
+    // the field is not used internally but it is validated and must be provided
+    bytes data = 3;
+}

tests/e2e/chain.go

@@ -14,6 +14,7 @@ import (
 	sdk "github.com/cosmos/cosmos-sdk/types"
 	authtypes "github.com/cosmos/cosmos-sdk/x/auth/types"
 	authvesting "github.com/cosmos/cosmos-sdk/x/auth/vesting/types"
+	banktypes "github.com/cosmos/cosmos-sdk/x/bank/types"
 	distribtypes "github.com/cosmos/cosmos-sdk/x/distribution/types"
 	evidencetypes "github.com/cosmos/cosmos-sdk/x/evidence/types"
 	govv1types "github.com/cosmos/cosmos-sdk/x/gov/types/v1"
@@ -23,6 +24,7 @@ import (
 	upgradetypes "github.com/cosmos/cosmos-sdk/x/upgrade/types"
 
 	gaiaparams "github.com/cosmos/gaia/v15/app/params"
+	metaprotocoltypes "github.com/cosmos/gaia/v15/x/metaprotocols/types"
 )
 
 const (
@@ -38,6 +40,7 @@ var (
 
 func init() {
 	encodingConfig = gaiaparams.MakeEncodingConfig()
+	banktypes.RegisterInterfaces(encodingConfig.InterfaceRegistry)
 	authtypes.RegisterInterfaces(encodingConfig.InterfaceRegistry)
 	authvesting.RegisterInterfaces(encodingConfig.InterfaceRegistry)
 	stakingtypes.RegisterInterfaces(encodingConfig.InterfaceRegistry)
@@ -51,6 +54,7 @@ func init() {
 	upgradetypes.RegisterInterfaces(encodingConfig.InterfaceRegistry)
 	distribtypes.RegisterInterfaces(encodingConfig.InterfaceRegistry)
 	providertypes.RegisterInterfaces(encodingConfig.InterfaceRegistry)
+	metaprotocoltypes.RegisterInterfaces(encodingConfig.InterfaceRegistry)
 
 	cdc = encodingConfig.Marshaler
 	txConfig = encodingConfig.TxConfig

tests/e2e/e2e_bank_test.go

@@ -2,13 +2,19 @@ package e2e
 
 import (
 	"fmt"
+	"path/filepath"
 	"time"
 
+	codectypes "github.com/cosmos/cosmos-sdk/codec/types"
 	sdk "github.com/cosmos/cosmos-sdk/types"
+	authTx "github.com/cosmos/cosmos-sdk/x/auth/tx"
+	banktypes "github.com/cosmos/cosmos-sdk/x/bank/types"
+
+	extensiontypes "github.com/cosmos/gaia/v15/x/metaprotocols/types"
 )
 
 func (s *IntegrationTestSuite) testBankTokenTransfer() {
-	s.Run("send_photon_between_accounts", func() {
+	s.Run("send_tokens_between_accounts", func() {
 		var (
 			err           error
 			valIdx        = 0
@@ -96,3 +102,117 @@ func (s *IntegrationTestSuite) testBankTokenTransfer() {
 		)
 	})
 }
+
+// tests the bank send command with populated non_critical_extension_options field
+// the Tx should succeed if the data can be properly encoded and decoded
+// the tx is signed and broadcast using gaiad tx sign and broadcast commands
+func (s *IntegrationTestSuite) bankSendWithNonCriticalExtensionOptions() {
+	s.Run("transfer_with_non_critical_extension_options", func() {
+		c := s.chainA
+
+		submitterAccount := c.genesisAccounts[1]
+		submitterAddress, err := submitterAccount.keyInfo.GetAddress()
+		s.Require().NoError(err)
+		sendMsg := banktypes.NewMsgSend(submitterAddress, submitterAddress, sdk.NewCoins(sdk.NewCoin(uatomDenom, sdk.NewInt(100))))
+
+		// valid non-critical extension options
+		ext := &extensiontypes.ExtensionData{
+			ProtocolId:      "test-protocol",
+			ProtocolVersion: "1",
+			Data:            []byte("Hello Cosmos"),
+		}
+
+		extAny, err := codectypes.NewAnyWithValue(ext)
+		s.Require().NoError(err)
+		s.Require().NotNil(extAny)
+
+		txBuilder := encodingConfig.TxConfig.NewTxBuilder()
+
+		s.Require().NoError(txBuilder.SetMsgs(sendMsg))
+
+		txBuilder.SetMemo("non-critical-ext-message-test")
+		txBuilder.SetFeeAmount(sdk.NewCoins(standardFees))
+		txBuilder.SetGasLimit(200000)
+
+		// add extension options
+		tx := txBuilder.GetTx()
+		if etx, ok := tx.(authTx.ExtensionOptionsTxBuilder); ok {
+			etx.SetNonCriticalExtensionOptions(extAny)
+		}
+
+		bz, err := encodingConfig.TxConfig.TxEncoder()(tx)
+		s.Require().NoError(err)
+		s.Require().NotNil(bz)
+
+		txWithExt, err := decodeTx(bz)
+		s.Require().NoError(err)
+		s.Require().NotNil(txWithExt)
+
+		rawTx, err := cdc.MarshalJSON(txWithExt)
+		s.Require().NoError(err)
+		s.Require().NotNil(rawTx)
+
+		unsignedFname := "unsigned_non_critical_extension_option_tx.json"
+		unsignedJSONFile := filepath.Join(c.validators[0].configDir(), unsignedFname)
+		err = writeFile(unsignedJSONFile, rawTx)
+		s.Require().NoError(err)
+
+		signedTx, err := s.signTxFileOnline(c, 0, submitterAddress.String(), unsignedFname)
+		s.Require().NoError(err)
+		s.Require().NotNil(signedTx)
+
+		signedFname := "signed_non_critical_extension_option_tx.json"
+		signedJSONFile := filepath.Join(c.validators[0].configDir(), signedFname)
+		err = writeFile(signedJSONFile, signedTx)
+		s.Require().NoError(err)
+
+		// if there's no errors the non_critical_extension_options field was properly encoded and decoded
+		out, err := s.broadcastTxFile(c, 0, submitterAddress.String(), signedFname)
+		s.Require().NoError(err)
+		s.Require().NotNil(out)
+	})
+}
+
+// tests the bank send command with invalid non_critical_extension_options field
+// the tx should always fail to decode the extension options since no concrete type is registered for the provided extension field
+func (s *IntegrationTestSuite) failedBankSendWithNonCriticalExtensionOptions() {
+	s.Run("fail_encoding_invalid_non_critical_extension_options", func() {
+		c := s.chainA
+
+		submitterAccount := c.genesisAccounts[1]
+		submitterAddress, err := submitterAccount.keyInfo.GetAddress()
+		s.Require().NoError(err)
+		sendMsg := banktypes.NewMsgSend(submitterAddress, submitterAddress, sdk.NewCoins(sdk.NewCoin(uatomDenom, sdk.NewInt(100))))
+
+		// the message does not matter, as long as it is in the interface registry
+		ext := &banktypes.MsgMultiSend{}
+
+		extAny, err := codectypes.NewAnyWithValue(ext)
+		s.Require().NoError(err)
+		s.Require().NotNil(extAny)
+
+		txBuilder := encodingConfig.TxConfig.NewTxBuilder()
+
+		s.Require().NoError(txBuilder.SetMsgs(sendMsg))
+
+		txBuilder.SetMemo("fail-non-critical-ext-message")
+		txBuilder.SetFeeAmount(sdk.NewCoins(standardFees))
+		txBuilder.SetGasLimit(200000)
+
+		// add extension options
+		tx := txBuilder.GetTx()
+		if etx, ok := tx.(authTx.ExtensionOptionsTxBuilder); ok {
+			etx.SetNonCriticalExtensionOptions(extAny)
+		}
+
+		bz, err := encodingConfig.TxConfig.TxEncoder()(tx)
+		s.Require().NoError(err)
+		s.Require().NotNil(bz)
+
+		// decode fails because the provided extension option does not implement the correct TxExtensionOptionI interface
+		txWithExt, err := decodeTx(bz)
+		s.Require().Error(err)
+		s.Require().ErrorContains(err, "failed to decode tx: no concrete type registered for type URL /cosmos.bank.v1beta1.MsgMultiSend against interface *tx.TxExtensionOptionI")
+		s.Require().Nil(txWithExt)
+	})
+}