feat(connect): introduce ignite connect (#102)

app.ignite.yml

@@ -24,6 +24,9 @@ apps:
   wasm:
     description: Scaffold a CosmosWasm-enabled chain with ease
     path: ./wasm
+  connect:
+    description: Interact with any Cosmos SDK based blockchain using Ignite Connect
+    path: ./connect
   cca:
     description: Scaffold a blockchain frontend in seconds with Ignite
     path: ./cca

connect/CHANGELOG.md

@@ -0,0 +1,5 @@
+# Connect App Changelog
+
+## [`v0.1.0`](https://github.com/ignite/apps/releases/tag/connect/v0.1.0)
+
+* First release of the Connect app compatible with Ignite >= v28.x.y

connect/README.md

@@ -0,0 +1,41 @@
+# Connect
+
+This Ignite App extends [Ignite CLI](https://github.com/ignite/cli) to let a user interact with any Cosmos SDK based chain.
+
+## Installation
+
+```shell
+ignite app install -g github.com/ignite/apps/connect
+```
+
+### Usage
+
+* Discover available chains
+
+```shell
+ignite connect discover
+```
+
+* Add a chain to interact with
+
+```shell
+ignite connect add atomone
+```
+
+* (Or) Add a local chain to interact with
+
+```shell
+ignite connect add simapp localhost:9090
+```
+
+* List all connected chains
+
+```shell
+ignite connect
+```
+
+* Remove a connected chain
+
+```shell
+ignite connect rm atomone
+```

connect/chains/config.go

@@ -0,0 +1,87 @@
+package chains
+
+import (
+	"fmt"
+	"os"
+	"path"
+
+	"gopkg.in/yaml.v3"
+
+	igniteconfig "github.com/ignite/cli/v28/ignite/config"
+)
+
+var (
+	configName = "connect.yaml"
+
+	// ErrConfigNotFound is returned when the config file is not found
+	ErrConfigNotFound = fmt.Errorf("config file not found")
+)
+
+type Config struct {
+	Chains map[string]*ChainConfig `yaml:"chains"`
+}
+
+type ChainConfig struct {
+	ChainID      string `yaml:"chain_id"`
+	Bech32Prefix string `yaml:"bech32_prefix"`
+	GRPCEndpoint string `yaml:"grpc_endpoint"`
+}
+
+func (c *Config) Save() error {
+	out, err := yaml.Marshal(c)
+	if err != nil {
+		return fmt.Errorf("failed to marshal config: %w", err)
+	}
+
+	configDir, err := ConfigDir()
+	if err != nil {
+		return err
+	}
+
+	connectConfigPath := path.Join(configDir, configName)
+	if err := os.WriteFile(connectConfigPath, out, 0o644); err != nil {
+		return fmt.Errorf("error saving config: %w", err)
+	}
+
+	return nil
+}
+
+func ReadConfig() (*Config, error) {
+	configDir, err := ConfigDir()
+	if err != nil {
+		return nil, err
+	}
+
+	connectConfigPath := path.Join(configDir, configName)
+	if _, err := os.Stat(connectConfigPath); os.IsNotExist(err) {
+		return &Config{map[string]*ChainConfig{}}, ErrConfigNotFound
+	} else if err != nil {
+		return nil, fmt.Errorf("failed to check config file: %w", err)
+	}
+
+	data, err := os.ReadFile(connectConfigPath)
+	if err != nil {
+		return nil, fmt.Errorf("failed to read config: %w", err)
+	}
+
+	var c Config
+	if err := yaml.Unmarshal(data, &c); err != nil {
+		return nil, fmt.Errorf("failed to unmarshal config: %w", err)
+	}
+
+	return &c, nil
+}
+
+func ConfigDir() (string, error) {
+	igniteConfigDir, err := igniteconfig.DirPath()
+	if err != nil {
+		return "", fmt.Errorf("failed to get ignite config directory: %w", err)
+	}
+
+	dir := path.Join(igniteConfigDir, "apps", "connect")
+	if err := os.MkdirAll(dir, 0o755); err != nil {
+		return "", fmt.Errorf("failed to create config directory: %w", err)
+	}
+
+	return dir, nil
+}

connect/chains/descriptors.go

@@ -0,0 +1,164 @@
+package chains
+
+import (
+	"context"
+	"crypto/tls"
+	"fmt"
+	"os"
+	"path"
+
+	authv1betav1 "cosmossdk.io/api/cosmos/auth/v1beta1"
+	autocliv1 "cosmossdk.io/api/cosmos/autocli/v1"
+	reflectionv1 "cosmossdk.io/api/cosmos/reflection/v1"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/credentials"
+	"google.golang.org/grpc/credentials/insecure"
+	"google.golang.org/protobuf/proto"
+	"google.golang.org/protobuf/reflect/protodesc"
+	"google.golang.org/protobuf/reflect/protoregistry"
+	"google.golang.org/protobuf/types/descriptorpb"
+)
+
+type Conn struct {
+	chainName string
+	config    *ChainConfig
+	configDir string
+	client    *grpc.ClientConn
+
+	ProtoFiles    *protoregistry.Files
+	ModuleOptions map[string]*autocliv1.ModuleOptions
+}
+
+func NewConn(chainName string, cfg *ChainConfig) (*Conn, error) {
+	configDir, err := ConfigDir()
+	if err != nil {
+		return nil, err
+	}
+
+	return &Conn{
+		chainName: chainName,
+		config:    cfg,
+		configDir: configDir,
+	}, nil
+}
+
+// fdsCacheFilename returns the filename for the cached file descriptor set.
+func (c *Conn) fdsCacheFilename() string {
+	return path.Join(c.configDir, fmt.Sprintf("%s.fds", c.chainName))
+}
+
+// appOptsCacheFilename returns the filename for the app options cache file.
+func (c *Conn) appOptsCacheFilename() string {
+	return path.Join(c.configDir, fmt.Sprintf("%s.autocli", c.chainName))
+}
+
+func (c *Conn) Load(ctx context.Context) error {
+	var err error
+	fdSet := &descriptorpb.FileDescriptorSet{}
+	fdsFilename := c.fdsCacheFilename()
+
+	if _, err := os.Stat(fdsFilename); os.IsNotExist(err) {
+		client, err := c.Connect()
+		if err != nil {
+			return err
+		}
+
+		reflectionClient := reflectionv1.NewReflectionServiceClient(client)
+		fdRes, err := reflectionClient.FileDescriptors(ctx, &reflectionv1.FileDescriptorsRequest{})
+		if err != nil {
+			return fmt.Errorf("error getting file descriptors: %w", err)
+		}
+
+		fdSet = &descriptorpb.FileDescriptorSet{File: fdRes.Files}
+		bz, err := proto.Marshal(fdSet)
+		if err != nil {
+			return err
+		}
+
+		if err = os.WriteFile(fdsFilename, bz, 0o600); err != nil {
+			return err
+		}
+	} else {
+		bz, err := os.ReadFile(fdsFilename)
+		if err != nil {
+			return err
+		}
+
+		if err = proto.Unmarshal(bz, fdSet); err != nil {
+			return err
+		}
+	}
+
+	c.ProtoFiles, err = protodesc.FileOptions{AllowUnresolvable: true}.NewFiles(fdSet)
+	if err != nil {
+		return fmt.Errorf("error building protoregistry.Files: %w", err)
+	}
+
+	appOptsFilename := c.appOptsCacheFilename()
+	if _, err := os.Stat(appOptsFilename); os.IsNotExist(err) {
+		client, err := c.Connect()
+		if err != nil {
+			return err
+		}
+
+		autocliQueryClient := autocliv1.NewQueryClient(client)
+		appOptsRes, err := autocliQueryClient.AppOptions(ctx, &autocliv1.AppOptionsRequest{})
+		if err != nil {
+			return fmt.Errorf("error getting autocli config: %w", err)
+		}
+
+		bz, err := proto.Marshal(appOptsRes)
+		if err != nil {
+			return err
+		}
+
+		if err := os.WriteFile(appOptsFilename, bz, 0o600); err != nil {
+			return err
+		}
+
+		c.ModuleOptions = appOptsRes.ModuleOptions
+	} else {
+		bz, err := os.ReadFile(appOptsFilename)
+		if err != nil {
+			return err
+		}
+
+		var appOptsRes autocliv1.AppOptionsResponse
+		if err := proto.Unmarshal(bz, &appOptsRes); err != nil {
+			return err
+		}
+
+		c.ModuleOptions = appOptsRes.ModuleOptions
+	}
+
+	return nil
+}
+
+func (c *Conn) Connect() (*grpc.ClientConn, error) {
+	if c.client != nil {
+		return c.client, nil
+	}
+
+	var err error
+	creds := credentials.NewTLS(&tls.Config{
+		MinVersion: tls.VersionTLS12,
+	})
+
+	c.client, err = grpc.NewClient(c.config.GRPCEndpoint, grpc.WithTransportCredentials(creds))
+	if err != nil {
+		return nil, fmt.Errorf("failed to connect to gRPC server: %w", err)
+	}
+
+	// try connection by querying an endpoint
+	// fallback to insecure if it doesn't work
+	authClient := authv1betav1.NewQueryClient(c.client)
+	if _, err = authClient.Params(context.Background(), &authv1betav1.QueryParamsRequest{}); err != nil {
+		creds = insecure.NewCredentials()
+		c.client, err = grpc.NewClient(c.config.GRPCEndpoint, grpc.WithTransportCredentials(creds))
+		if err != nil {
+			return nil, fmt.Errorf("failed to connect to gRPC server: %w", err)
+		}
+	}
+
+	return c.client, nil
+}

connect/chains/keyring.go

@@ -0,0 +1,3 @@
+package chains
+
+// TODO(@julienrbrt): Implement in follow-up.