Basic RPC and CLI Queries (#77)

- Adds ethermint query command (`emintcli query ethermint <query>`)
    - Supports block number, storage, code, balance lookups
- Implements RPC API methods `eth_blockNumber`, `eth_getStorageAt`, `eth_getBalance`, and `eth_getCode`
- Adds tester utility for RPC calls
    - Adheres to go test format, but should not be run with regular suite
    - Requires daemon and RPC server to be running
    - Excluded from `make test`, available with `make test-rpc`
- Implemented AppModule interface and added EVM module to app
    - Required for routing
- Implements `InitGenesis` (`x/evm/genesis.go`) and stubs `ExportGenesis`
- Modifies GenesisAccount to match expected format

Makefile

@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-PACKAGES=$(shell go list ./... | grep -Ev 'vendor|importer')
+PACKAGES=$(shell go list ./... | grep -Ev 'vendor|importer|rpc/tester')
 COMMIT_HASH := $(shell git rev-parse --short HEAD)
 BUILD_FLAGS = -tags netgo -ldflags "-X github.com/cosmos/ethermint/version.GitCommit=${COMMIT_HASH}"
 DOCKER_TAG = unstable
@@ -146,6 +146,9 @@ test-import:
 	--blockchain blockchain --timeout=5m
 	# TODO: remove tmp directory after test run to avoid subsequent errors
 
+test-rpc:
+	@${GO_MOD} go test -v --vet=off ./rpc/tester
+
 godocs:
 	@echo "--> Wait a few seconds and visit http://localhost:6060/pkg/github.com/cosmos/ethermint"
 	godoc -http=:6060

app/ethermint.go

@@ -59,8 +59,7 @@ var (
 		crisis.AppModuleBasic{},
 		slashing.AppModuleBasic{},
 		supply.AppModuleBasic{},
-		// TODO: Enable EVM AppModuleBasic
+		evm.AppModuleBasic{},
-		//evm.AppModuleBasic{},
 	)
 )
 
@@ -185,7 +184,7 @@ func NewEthermintApp(logger tmlog.Logger, db dbm.DB, loadLatest bool,
 	app.slashingKeeper = slashing.NewKeeper(app.cdc, app.keySlashing, &stakingKeeper,
 		slashingSubspace, slashing.DefaultCodespace)
 	app.crisisKeeper = crisis.NewKeeper(crisisSubspace, invCheckPeriod, app.supplyKeeper, auth.FeeCollectorName)
-	app.evmKeeper = evm.NewKeeper(app.accountKeeper, app.evmStoreKey, app.evmCodeKey)
+	app.evmKeeper = evm.NewKeeper(app.accountKeeper, app.evmStoreKey, app.evmCodeKey, cdc)
 
 	// register the proposal types
 	govRouter := gov.NewRouter()
@@ -212,6 +211,7 @@ func NewEthermintApp(logger tmlog.Logger, db dbm.DB, loadLatest bool,
 		mint.NewAppModule(app.mintKeeper),
 		slashing.NewAppModule(app.slashingKeeper, app.stakingKeeper),
 		staking.NewAppModule(app.stakingKeeper, app.distrKeeper, app.accountKeeper, app.supplyKeeper),
+		evm.NewAppModule(app.evmKeeper),
 	)
 
 	// During begin block slashing happens after distr.BeginBlocker so that

cmd/emintcli/main.go

@@ -1,6 +1,8 @@
 package main
 
 import (
+	"github.com/cosmos/ethermint/rpc"
+	"github.com/tendermint/go-amino"
 	"os"
 	"path"
 
@@ -10,7 +12,6 @@ import (
 	sdk "github.com/cosmos/cosmos-sdk/types"
 
 	emintapp "github.com/cosmos/ethermint/app"
-	"github.com/cosmos/ethermint/rpc"
 	"github.com/spf13/cobra"
 	"github.com/spf13/viper"
 	"github.com/tendermint/tendermint/libs/cli"
@@ -43,7 +44,7 @@ func main() {
 	rootCmd.AddCommand(
 		sdkrpc.StatusCommand(),
 		client.ConfigCmd(emintapp.DefaultCLIHome),
-		// TODO: Set up query command
+		queryCmd(cdc),
 		// TODO: Set up tx command
 		// TODO: Set up rest routes (if included, different from web3 api)
 		rpc.Web3RpcCmd(cdc),
@@ -59,6 +60,24 @@ func main() {
 	}
 }
 
+func queryCmd(cdc *amino.Codec) *cobra.Command {
+	queryCmd := &cobra.Command{
+		Use:     "query",
+		Aliases: []string{"q"},
+		Short:   "Querying subcommands",
+	}
+
+	// TODO: Possibly add these query commands from other modules
+	//queryCmd.AddCommand(
+	// ...
+	//)
+
+	// add modules' query commands
+	emintapp.ModuleBasics.AddQueryCommands(queryCmd, cdc)
+
+	return queryCmd
+}
+
 func initConfig(cmd *cobra.Command) error {
 	home, err := cmd.PersistentFlags().GetString(cli.HomeFlag)
 	if err != nil {

go.mod

@@ -46,6 +46,7 @@ require (
 	github.com/steakknife/hamming v0.0.0-20180906055917-c99c65617cd3 // indirect
 	github.com/stretchr/testify v1.3.0
 	github.com/syndtr/goleveldb v1.0.0 // indirect
+	github.com/tendermint/go-amino v0.15.0
 	github.com/tendermint/tendermint v0.32.0
 	github.com/tyler-smith/go-bip39 v1.0.0 // indirect
 	github.com/wsddn/go-ecdh v0.0.0-20161211032359-48726bab9208 // indirect

go.sum

@@ -39,15 +39,11 @@ github.com/cespare/cp v1.1.1/go.mod h1:SOGHArjBr4JWaSDEVpWpo/hNg6RoKrls6Oh40hiwW
 github.com/cespare/xxhash v1.1.0/go.mod h1:XrSqR1VqqWfGrhpAt58auRo0WTKS1nRRg3ghfAqPWnc=
 github.com/client9/misspell v0.3.4 h1:ta993UF76GwbvJcIo3Y68y/M3WxlpEHPWIGDkJYwzJI=
 github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
-github.com/coreos/bbolt v1.3.2/go.mod h1:iRUV2dpdMOn7Bo10OQBFzIJO9kkE559Wcmn+qkEiiKk=
 github.com/coreos/etcd v3.3.10+incompatible/go.mod h1:uF7uidLiAD3TWHmW31ZFd/JWoc32PjwdhPthX9715RE=
 github.com/coreos/go-etcd v2.0.0+incompatible/go.mod h1:Jez6KQU2B/sWsbdaef3ED8NzMklzPG4d5KIOhIy30Tk=
 github.com/coreos/go-semver v0.2.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3EedlOD2RNk=
-github.com/cosmos/cosmos-sdk v0.28.2-0.20190709220430-3f519832a7a5 h1:gakqjbZrqlUB1/rx8r/s86SVcRatOafVDfJF99yBcng=
-github.com/cosmos/cosmos-sdk v0.28.2-0.20190709220430-3f519832a7a5/go.mod h1:qzvnGkt2+ynMpjmf9/dws/94/qM87awRbuyvF7r2R8Q=
 github.com/cosmos/cosmos-sdk v0.28.2-0.20190711105643-280734d0e37f h1:jmVM19bsHZRVVe8rugzfILuL3VPgCj5b6941I20Naw0=
 github.com/cosmos/cosmos-sdk v0.28.2-0.20190711105643-280734d0e37f/go.mod h1:qzvnGkt2+ynMpjmf9/dws/94/qM87awRbuyvF7r2R8Q=
-github.com/cosmos/cosmos-sdk v0.35.0 h1:EPeie1aKHwnXtTzKggvabG7aAPN+DDmju2xquvjFwao=
 github.com/cosmos/go-bip39 v0.0.0-20180618194314-52158e4697b8 h1:Iwin12wRQtyZhH6FV3ykFcdGNlYEzoeR0jN8Vn+JWsI=
 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=
@@ -124,8 +120,6 @@ github.com/google/uuid v1.0.0 h1:b4Gk+7WdP/d3HZH8EJsZpvV7EtDOgaZLtnaNGIu1adA=
 github.com/google/uuid v1.0.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/gorilla/mux v1.7.0 h1:tOSd0UKHQd6urX6ApfOn4XdBMY6Sh1MfxV3kmaazO+U=
 github.com/gorilla/mux v1.7.0/go.mod h1:1lud6UwP+6orDFRuTfBEV8e9/aOM/c4fVVCaMa2zaAs=
-github.com/gorilla/mux v1.7.3 h1:gnP5JzjVOuiZD07fKKToCAOjS0yOpj/qPETTXCCS6hw=
-github.com/gorilla/mux v1.7.3/go.mod h1:1lud6UwP+6orDFRuTfBEV8e9/aOM/c4fVVCaMa2zaAs=
 github.com/gorilla/websocket v1.2.0 h1:VJtLvh6VQym50czpZzx07z/kw9EgAxI3x1ZB8taTMQQ=
 github.com/gorilla/websocket v1.2.0/go.mod h1:E7qHFY5m1UJ88s3WnNqhKjPHQ0heANvMoAMk2YaljkQ=
 github.com/gorilla/websocket v1.4.0 h1:WDFjx/TMzVgy9VdMMQi2K2Emtwi2QcUQsztZ/zLaH/Q=
@@ -146,7 +140,6 @@ github.com/jackpal/go-nat-pmp v1.0.1/go.mod h1:QPH045xvCAeXUZOxsnwmrtiCoxIr9eob+
 github.com/jessevdk/go-flags v0.0.0-20141203071132-1679536dcc89/go.mod h1:4FA24M0QyGHXBuZZK/XkWh8h0e1EYbRYJSGM75WSRxI=
 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/json-iterator/go v1.1.6/go.mod h1:+SdeFBvtyEkXs7REEP0seUULqWtbJapLOCVDaaPEHmU=
 github.com/julienschmidt/httprouter v1.2.0/go.mod h1:SYymIcj16QtmaHHD7aYtjjsJG7VTCxuUUipMqKk8s4w=
@@ -212,7 +205,6 @@ github.com/prometheus/client_model v0.0.0-20180712105110-5c3871d89910/go.mod h1:
 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/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 v0.0.0-20181126121408-4724e9255275/go.mod h1:daVV7qP5qjZbuso7PdcryaAu0sAZbrN9i7WWcTMWvro=
 github.com/prometheus/common v0.2.0 h1:kUZDBDTdBVBYBj5Tmh2NZLlF60mfjA27rM34b+cVwNU=
 github.com/prometheus/common v0.2.0/go.mod h1:TNfzLD0ON7rHzMJeJkieUDPYmFC7Snx/y86RQel1bk4=
@@ -301,7 +293,6 @@ github.com/wsddn/go-ecdh v0.0.0-20161211032359-48726bab9208/go.mod h1:IotVbo4F+m
 github.com/xordataexchange/crypt v0.0.3-0.20170626215501-b2862e3d0a77/go.mod h1:aYKd//L2LvnjZzWKhF00oedf4jCCReLcmhLdhm1A27Q=
 github.com/zondax/hid v0.9.0 h1:eiT3P6vNxAEVxXMw66eZUAAnU2zD33JBkfG/EnfAKl8=
 github.com/zondax/hid v0.9.0/go.mod h1:l5wttcP0jwtdLjqjMMWFVEE7d1zO0jvSPA9OPZxWpEM=
-go.etcd.io/bbolt v1.3.2/go.mod h1:IbVyRI1SCnLcuJnV2u8VeU0CEYM7e686BmAb1XKL+uU=
 go.etcd.io/bbolt v1.3.3 h1:MUGmc65QhB3pIlaQ5bB4LwqSj6GIonVJXpZiaKNyaKk=
 go.etcd.io/bbolt v1.3.3/go.mod h1:IbVyRI1SCnLcuJnV2u8VeU0CEYM7e686BmAb1XKL+uU=
 golang.org/x/crypto v0.0.0-20170930174604-9419663f5a44/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
@@ -340,7 +331,6 @@ golang.org/x/sys v0.0.0-20180905080454-ebe1bf3edb33/go.mod h1:STP8DvDyc/dI5b8T5h
 golang.org/x/sys v0.0.0-20180909124046-d0be0721c37e/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20180926160741-c2ed4eda69e7 h1:bit1t3mgdR35yN0cX0G8orgLtOuyL9Wqxa1mccLB0ig=
 golang.org/x/sys v0.0.0-20180926160741-c2ed4eda69e7/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
-golang.org/x/sys v0.0.0-20181107165924-66b7b1311ac8/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20181116152217-5ac8a444bdc5/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20181205085412-a5c9d58dba9a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=

rpc/apis_test.go

@@ -1,77 +0,0 @@
-package rpc
-
-import (
-	"context"
-	sdkcontext"github.com/cosmos/cosmos-sdk/client/context"
-	"testing"
-	"time"
-
-	"github.com/cosmos/ethermint/version"
-	"github.com/ethereum/go-ethereum/rpc"
-	"github.com/stretchr/testify/require"
-	"github.com/stretchr/testify/suite"
-)
-
-type apisTestSuite struct {
-	suite.Suite
-	Stop context.CancelFunc
-	Port int
-}
-
-func (s *apisTestSuite) SetupSuite() {
-	stop, port, err := startAPIServer()
-	require.Nil(s.T(), err, "unexpected error")
-	s.Stop = stop
-	s.Port = port
-}
-
-func (s *apisTestSuite) TearDownSuite() {
-	s.Stop()
-}
-
-func (s *apisTestSuite) TestPublicWeb3APIClientVersion() {
-	res, err := rpcCall(s.Port, "web3_clientVersion", []string{})
-	require.Nil(s.T(), err, "unexpected error")
-	require.Equal(s.T(), version.ClientVersion(), res)
-}
-
-func (s *apisTestSuite) TestPublicWeb3APISha3() {
-	res, err := rpcCall(s.Port, "web3_sha3", []string{"0x67656c6c6f20776f726c64"})
-	require.Nil(s.T(), err, "unexpected error")
-	require.Equal(s.T(), "0x1b84adea42d5b7d192fd8a61a85b25abe0757e9a65cab1da470258914053823f", res)
-}
-
-func (s *apisTestSuite) TestMiningAPIs() {
-	res, err := rpcCall(s.Port, "eth_mining", nil)
-	require.Nil(s.T(), err, "unexpected error")
-	require.Equal(s.T(), false, res)
-
-	res, err = rpcCall(s.Port, "eth_hashrate", nil)
-	require.Nil(s.T(), err, "unexpected error")
-	require.Equal(s.T(), "0x0", res)
-}
-
-func TestAPIsTestSuite(t *testing.T) {
-	suite.Run(t, new(apisTestSuite))
-}
-
-func startAPIServer() (context.CancelFunc, int, error) {
-	config := &Config{
-		RPCAddr: "127.0.0.1",
-		RPCPort: randomPort(),
-	}
-	timeouts := rpc.HTTPTimeouts{
-		ReadTimeout:  5 * time.Second,
-		WriteTimeout: 5 * time.Second,
-		IdleTimeout:  5 * time.Second,
-	}
-
-	ctx, cancel := context.WithCancel(context.Background())
-
-	_, err := StartHTTPEndpoint(ctx, config, GetRPCAPIs(sdkcontext.NewCLIContext()), timeouts)
-	if err != nil {
-		return cancel, 0, err
-	}
-
-	return cancel, config.RPCPort, nil
-}

rpc/eth_api.go

@@ -1,8 +1,10 @@
 package rpc
 
 import (
+	"fmt"
 	"github.com/cosmos/cosmos-sdk/client/context"
 	"github.com/cosmos/ethermint/version"
+	"github.com/cosmos/ethermint/x/evm/types"
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/common/hexutil"
 	"github.com/ethereum/go-ethereum/rpc"
@@ -11,7 +13,7 @@ import (
 )
 
 // PublicEthAPI is the eth_ prefixed set of APIs in the Web3 JSON-RPC spec.
-type PublicEthAPI struct{
+type PublicEthAPI struct {
 	cliCtx context.CLIContext
 }
 
@@ -61,18 +63,41 @@ func (e *PublicEthAPI) Accounts() []common.Address {
 
 // BlockNumber returns the current block number.
 func (e *PublicEthAPI) BlockNumber() *big.Int {
-	return big.NewInt(0)
+	res, _, err := e.cliCtx.QueryWithData(fmt.Sprintf("custom/%s/blockNumber", types.ModuleName), nil)
+	if err != nil {
+		fmt.Printf("could not resolve: %s\n", err)
+		return nil
+	}
+
+	var out types.QueryResBlockNumber
+	e.cliCtx.Codec.MustUnmarshalJSON(res, &out)
+	return out.Number
 }
 
 // GetBalance returns the provided account's balance up to the provided block number.
 func (e *PublicEthAPI) GetBalance(address common.Address, blockNum rpc.BlockNumber) *hexutil.Big {
-	out := big.NewInt(0)
+	res, _, err := e.cliCtx.QueryWithData(fmt.Sprintf("custom/%s/balance/%s", types.ModuleName, address), nil)
-	return (*hexutil.Big)(out)
+	if err != nil {
+		fmt.Printf("could not resolve: %s\n", err)
+		return nil
+	}
+
+	var out types.QueryResBalance
+	e.cliCtx.Codec.MustUnmarshalJSON(res, &out)
+	return (*hexutil.Big)(out.Balance)
 }
 
 // GetStorageAt returns the contract storage at the given address, block number, and key.
 func (e *PublicEthAPI) GetStorageAt(address common.Address, key string, blockNum rpc.BlockNumber) hexutil.Bytes {
-	return nil
+	res, _, err := e.cliCtx.QueryWithData(fmt.Sprintf("custom/%s/storage/%s/%s", types.ModuleName, address, key), nil)
+	if err != nil {
+		fmt.Printf("could not resolve: %s\n", err)
+		return nil
+	}
+
+	var out types.QueryResStorage
+	e.cliCtx.Codec.MustUnmarshalJSON(res, &out)
+	return out.Value[:]
 }
 
 // GetTransactionCount returns the number of transactions at the given address up to the given block number.
@@ -102,7 +127,15 @@ func (e *PublicEthAPI) GetUncleCountByBlockNumber(blockNum rpc.BlockNumber) hexu
 
 // GetCode returns the contract code at the given address and block number.
 func (e *PublicEthAPI) GetCode(address common.Address, blockNumber rpc.BlockNumber) hexutil.Bytes {
-	return nil
+	res, _, err := e.cliCtx.QueryWithData(fmt.Sprintf("custom/%s/code/%s", types.ModuleName, address), nil)
+	if err != nil {
+		fmt.Printf("could not resolve: %s\n", err)
+		return nil
+	}
+
+	var out types.QueryResCode
+	e.cliCtx.Codec.MustUnmarshalJSON(res, &out)
+	return out.Code
 }
 
 // Sign signs the provided data using the private key of address via Geth's signature standard.

rpc/rpc.go

@@ -1,38 +0,0 @@
-package rpc
-
-import (
-	"context"
-	"fmt"
-
-	"github.com/ethereum/go-ethereum/rpc"
-)
-
-// StartHTTPEndpoint starts the Tendermint Web3-compatible RPC layer. Consumes
-// a Context for cancellation, a config struct, and a list of rpc.API interfaces
-// that will be automatically wired into a JSON-RPC webserver.
-func StartHTTPEndpoint(ctx context.Context, config *Config, apis []rpc.API, timeouts rpc.HTTPTimeouts) (*rpc.Server, error) {
-	uniqModules := make(map[string]string)
-	for _, api := range apis {
-		uniqModules[api.Namespace] = api.Namespace
-	}
-
-	modules := make([]string, len(uniqModules))
-	i := 0
-	for k := range uniqModules {
-		modules[i] = k
-		i++
-	}
-
-	endpoint := fmt.Sprintf("%s:%d", config.RPCAddr, config.RPCPort)
-	_, server, err := rpc.StartHTTPEndpoint(
-		endpoint, apis, modules, config.RPCCORSDomains, config.RPCVHosts, timeouts,
-	)
-
-	go func() {
-		<-ctx.Done()
-		fmt.Println("Shutting down server.")
-		server.Stop()
-	}()
-
-	return server, err
-}

rpc/rpc_test.go

@@ -1,94 +0,0 @@
-package rpc
-
-import (
-	"context"
-	"encoding/json"
-	"fmt"
-	"io/ioutil"
-	"math/rand"
-	"net/http"
-	"strings"
-	"testing"
-	"time"
-
-	"github.com/ethereum/go-ethereum/rpc"
-	"github.com/stretchr/testify/require"
-)
-
-type TestService struct{}
-
-func (s *TestService) Foo(arg string) string {
-	return arg
-}
-
-func TestStartHTTPEndpointStartStop(t *testing.T) {
-	config := &Config{
-		RPCAddr: "127.0.0.1",
-		RPCPort: randomPort(),
-	}
-
-	ctx, cancel := context.WithCancel(context.Background())
-
-	_, err := StartHTTPEndpoint(
-		ctx, config, []rpc.API{
-			{
-				Namespace: "test",
-				Version:   "1.0",
-				Service:   &TestService{},
-				Public:    true,
-			},
-		},
-		rpc.HTTPTimeouts{
-			ReadTimeout:  5 * time.Second,
-			WriteTimeout: 5 * time.Second,
-			IdleTimeout:  5 * time.Second,
-		},
-	)
-	require.Nil(t, err, "unexpected error")
-
-	res, err := rpcCall(config.RPCPort, "test_foo", []string{"baz"})
-	require.Nil(t, err, "unexpected error")
-
-	resStr := res.(string)
-	require.Equal(t, "baz", resStr)
-
-	cancel()
-
-	_, err = rpcCall(config.RPCPort, "test_foo", []string{"baz"})
-	require.NotNil(t, err)
-}
-
-func rpcCall(port int, method string, params []string) (interface{}, error) {
-	parsedParams, err := json.Marshal(params)
-	if err != nil {
-		return nil, err
-	}
-
-	fullBody := fmt.Sprintf(
-		`{ "id": 1, "jsonrpc": "2.0", "method": "%s", "params": %s }`,
-		method, string(parsedParams),
-	)
-
-	res, err := http.Post(fmt.Sprintf("http://127.0.0.1:%d", port), "application/json", strings.NewReader(fullBody))
-	if err != nil {
-		return nil, err
-	}
-
-	data, err := ioutil.ReadAll(res.Body)
-	if err != nil {
-		return nil, err
-	}
-
-	var out map[string]interface{}
-	err = json.Unmarshal(data, &out)
-	if err != nil {
-		return nil, err
-	}
-
-	result := out["result"].(interface{})
-	return result, nil
-}
-
-func randomPort() int {
-	return rand.Intn(65535-1025) + 1025
-}

rpc/tester/tester_test.go

@@ -0,0 +1,129 @@
+// This is a test utility for Ethermint's Web3 JSON-RPC services.
+//
+// To run these tests please first ensure you have the emintd running
+// and have started the RPC service with `emintcl rest-server`.
+//
+// You can configure the desired port (or host) below.
+
+package tester
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"github.com/cosmos/ethermint/version"
+	"github.com/cosmos/ethermint/x/evm/types"
+	"io/ioutil"
+	"math/big"
+	"net/http"
+	"testing"
+)
+
+const (
+	host          = "127.0.0.1"
+	port          = 1317
+	addrA         = "0xc94770007dda54cF92009BFF0dE90c06F603a09f"
+	addrAStoreKey = 0
+)
+
+var addr = fmt.Sprintf("http://%s:%d/rpc", host, port)
+
+type Request struct {
+	Version string   `json:"jsonrpc"`
+	Method  string   `json:"method"`
+	Params  []string `json:"params"`
+	Id      int      `json:"id"`
+}
+
+func createRequest(method string, params []string) Request {
+	return Request{
+		Version: "2.0",
+		Method:  method,
+		Params:  params,
+		Id:      1,
+	}
+}
+
+func call(t *testing.T, method string, params []string, resp interface{}) {
+	req, err := json.Marshal(createRequest(method, params))
+	if err != nil {
+		t.Error(err)
+	}
+
+	res, err := http.Post(addr, "application/json", bytes.NewBuffer(req))
+	if err != nil {
+		t.Error(err)
+	}
+	defer res.Body.Close()
+
+	body, err := ioutil.ReadAll(res.Body)
+	if err != nil {
+		t.Error(err)
+	}
+
+	err = json.Unmarshal(body, resp)
+	if err != nil {
+		t.Error(err)
+	}
+}
+
+func TestEth_protocolVersion(t *testing.T) {
+	expectedRes := version.ProtocolVersion
+
+	res := &types.QueryResProtocolVersion{}
+	call(t, "eth_protocolVersion", []string{}, res)
+
+	t.Logf("Got protocol version: %s\n", res.Version)
+
+	if res.Version != expectedRes {
+		t.Errorf("expected: %s got: %s\n", expectedRes, res)
+	}
+}
+
+func TestEth_blockNumber(t *testing.T) {
+	res := &types.QueryResBlockNumber{}
+	call(t, "eth_blockNumber", []string{}, res)
+
+	t.Logf("Got block number: %s\n", res.Number.String())
+
+	// -1 if x <  y, 0 if x == y; where x is res, y is 0
+	if res.Number.Cmp(big.NewInt(0)) < 1 {
+		t.Errorf("Invalid block number got: %v", res)
+	}
+}
+
+func TestEth_GetBalance(t *testing.T) {
+	//expectedRes := types.QueryResBalance{Balance:}
+	res := &types.QueryResBalance{}
+	call(t, "eth_getBalance", []string{addrA, "latest"}, res)
+
+	t.Logf("Got balance %s for %s\n", res.Balance.String(), addrA)
+
+	// 0 if x == y; where x is res, y is 0
+	if res.Balance.ToInt().Cmp(big.NewInt(0)) != 0 {
+		t.Errorf("expected balance: %d, got: %s", 0, res.Balance.String())
+	}
+}
+
+func TestEth_GetStorageAt(t *testing.T) {
+	expectedRes := types.QueryResStorage{Value: []byte{}}
+	res := &types.QueryResStorage{}
+	call(t, "eth_getStorageAt", []string{addrA, string(addrAStoreKey), "latest"}, res)
+
+	t.Logf("Got value [%X] for %s with key %X\n", res.Value, addrA, addrAStoreKey)
+
+	if !bytes.Equal(res.Value, expectedRes.Value) {
+		t.Errorf("expected: %X got: %X", expectedRes.Value, res.Value)
+	}
+}
+
+func TestEth_GetCode(t *testing.T) {
+	expectedRes := types.QueryResCode{Code: []byte{}}
+	res := &types.QueryResCode{}
+	call(t, "eth_getCode", []string{addrA, "latest"}, res)
+
+	t.Logf("Got code [%X] for %s\n", res.Code, addrA)
+	if !bytes.Equal(expectedRes.Code, res.Code) {
+		t.Errorf("expected: %X got: %X", expectedRes.Code, res.Code)
+	}
+}

rpc/web3_api.go

@@ -7,7 +7,7 @@ import (
 )
 
 // PublicWeb3API is the web3_ prefixed set of APIs in the Web3 JSON-RPC spec.
-type PublicWeb3API struct {}
+type PublicWeb3API struct{}
 
 // NewPublicWeb3API creates an instance of the Web3 API.
 func NewPublicWeb3API() *PublicWeb3API {

x/evm/client/cli/query.go

@@ -0,0 +1,96 @@
+package cli
+
+import (
+	"fmt"
+	"github.com/cosmos/cosmos-sdk/client"
+	"github.com/cosmos/cosmos-sdk/client/context"
+	"github.com/cosmos/cosmos-sdk/codec"
+	"github.com/cosmos/ethermint/x/evm/types"
+	"github.com/spf13/cobra"
+)
+
+func GetQueryCmd(moduleName string, cdc *codec.Codec) *cobra.Command {
+	evmQueryCmd := &cobra.Command{
+		Use:                        types.ModuleName,
+		Short:                      "Querying commands for the evm module",
+		DisableFlagParsing:         true,
+		SuggestionsMinimumDistance: 2,
+		RunE:                       client.ValidateCmd,
+	}
+	evmQueryCmd.AddCommand(client.GetCommands(
+		GetCmdGetBlockNumber(moduleName, cdc),
+		GetCmdGetStorageAt(moduleName, cdc),
+		GetCmdGetCode(moduleName, cdc),
+	)...)
+	return evmQueryCmd
+}
+
+// GetCmdGetBlockNumber queries information about the current block number
+func GetCmdGetBlockNumber(queryRoute string, cdc *codec.Codec) *cobra.Command {
+	return &cobra.Command{
+		Use:   "block-number",
+		Short: "Gets block number (block height)",
+		RunE: func(cmd *cobra.Command, args []string) error {
+			cliCtx := context.NewCLIContext().WithCodec(cdc)
+
+			res, _, err := cliCtx.QueryWithData(fmt.Sprintf("custom/%s/blockNumber", queryRoute), nil)
+			if err != nil {
+				fmt.Printf("could not resolve: %s\n", err)
+				return nil
+			}
+
+			var out types.QueryResBlockNumber
+			cdc.MustUnmarshalJSON(res, &out)
+			return cliCtx.PrintOutput(out)
+		},
+	}
+}
+
+// GetCmdGetStorageAt queries a key in an accounts storage
+func GetCmdGetStorageAt(queryRoute string, cdc *codec.Codec) *cobra.Command {
+	return &cobra.Command{
+		Use:   "storage [account] [key]",
+		Short: "Gets storage for an account at a given key",
+		Args:  cobra.ExactArgs(2),
+		RunE: func(cmd *cobra.Command, args []string) error {
+			cliCtx := context.NewCLIContext().WithCodec(cdc)
+
+			// TODO: Validate args
+			account := args[0]
+			key := args[1]
+
+			res, _, err := cliCtx.QueryWithData(fmt.Sprintf("custom/%s/storage/%s/%s", queryRoute, account, key), nil)
+			if err != nil {
+				fmt.Printf("could not resolve: %s\n", err)
+				return nil
+			}
+			var out types.QueryResStorage
+			cdc.MustUnmarshalJSON(res, &out)
+			return cliCtx.PrintOutput(out)
+		},
+	}
+}
+
+// GetCmdGetCode queries the code field of a given address
+func GetCmdGetCode(queryRoute string, cdc *codec.Codec) *cobra.Command {
+	return &cobra.Command{
+		Use:   "code [account]",
+		Short: "Gets code from an account",
+		Args:  cobra.ExactArgs(1),
+		RunE: func(cmd *cobra.Command, args []string) error {
+			cliCtx := context.NewCLIContext().WithCodec(cdc)
+
+			// TODO: Validate args
+			account := args[0]
+
+			res, _, err := cliCtx.QueryWithData(fmt.Sprintf("custom/%s/code/%s", queryRoute, account), nil)
+			if err != nil {
+				fmt.Printf("could not resolve: %s\n", err)
+				return nil
+			}
+			var out types.QueryResCode
+			cdc.MustUnmarshalJSON(res, &out)
+			return cliCtx.PrintOutput(out)
+		},
+	}
+}

x/evm/genesis.go

@@ -4,6 +4,9 @@ import (
 	"fmt"
 	sdk "github.com/cosmos/cosmos-sdk/types"
 	"github.com/cosmos/ethermint/types"
+	ethcmn "github.com/ethereum/go-ethereum/common"
+	abci "github.com/tendermint/tendermint/abci/types"
+	"math/big"
 )
 
 type (
@@ -15,8 +18,8 @@ type (
 
 	// GenesisAccount defines an account to be initialized in the genesis state.
 	GenesisAccount struct {
-		Address sdk.AccAddress `json:"address"`
+		Address ethcmn.Address `json:"address"`
-		Coins   sdk.Coins      `json:"coins"`
+		Balance *big.Int       `json:"balance"`
 		Code    []byte         `json:"code,omitempty"`
 		Storage types.Storage  `json:"storage,omitempty"`
 	}
@@ -24,11 +27,11 @@ type (
 
 func ValidateGenesis(data GenesisState) error {
 	for _, acct := range data.Accounts {
-		if acct.Address == nil {
+		if len(acct.Address.Bytes()) == 0 {
 			return fmt.Errorf("Invalid GenesisAccount Error: Missing Address")
 		}
-		if acct.Coins == nil {
+		if acct.Balance == nil {
-			return fmt.Errorf("Invalid GenesisAccount Error: Missing Coins")
+			return fmt.Errorf("Invalid GenesisAccount Error: Missing Balance")
 		}
 	}
 	return nil
@@ -40,14 +43,15 @@ func DefaultGenesisState() GenesisState {
 	}
 }
 
-// TODO: Implement these once keeper is established
+func InitGenesis(ctx sdk.Context, keeper Keeper, data GenesisState) []abci.ValidatorUpdate {
-//func InitGenesis(ctx sdk.Context, keeper Keeper, data GenesisState) []abci.ValidatorUpdate {
+	for _, record := range data.Accounts {
-//	for _, record := range data.Accounts {
+		keeper.SetCode(ctx, record.Address, record.Code)
-//		// TODO: Add to keeper
+		keeper.CreateGenesisAccount(ctx, record)
-//	}
+	}
-//	return []abci.ValidatorUpdate{}
+	return []abci.ValidatorUpdate{}
-//}
+}
-//
+
-//func ExportGenesis(ctx sdk.Context, k Keeper) GenesisState {
+// TODO: Implement
-//	return GenesisState{Accounts: nil}
+func ExportGenesis(ctx sdk.Context, k Keeper) GenesisState {
-//}
+	return GenesisState{Accounts: nil}
+}

x/evm/keeper.go

@@ -1,6 +1,7 @@
 package evm
 
 import (
+	"github.com/cosmos/cosmos-sdk/codec"
 	ethcmn "github.com/ethereum/go-ethereum/common"
 	ethvm "github.com/ethereum/go-ethereum/core/vm"
 
@@ -17,14 +18,31 @@ import (
 // to the StateDB interface
 type Keeper struct {
 	csdb *types.CommitStateDB
+	cdc  *codec.Codec
 }
 
-func NewKeeper(ak auth.AccountKeeper, storageKey, codeKey sdk.StoreKey) Keeper {
+func NewKeeper(ak auth.AccountKeeper, storageKey, codeKey sdk.StoreKey, cdc *codec.Codec) Keeper {
 	return Keeper{
 		csdb: types.NewCommitStateDB(sdk.Context{}, ak, storageKey, codeKey),
+		cdc:  cdc,
 	}
 }
 
+// ----------------------------------------------------------------------------
+// Genesis
+// ----------------------------------------------------------------------------
+
+// CreateGenesisAccount initializes an account and its balance, code, and storage
+func (k *Keeper) CreateGenesisAccount(ctx sdk.Context, account GenesisAccount) {
+	csdb := k.csdb.WithContext(ctx)
+	csdb.SetBalance(account.Address, account.Balance)
+	csdb.SetCode(account.Address, account.Code)
+	for _, key := range account.Storage {
+		csdb.SetState(account.Address, key, account.Storage[key])
+	}
+
+}
+
 // ----------------------------------------------------------------------------
 // Setters
 // ----------------------------------------------------------------------------

x/evm/module.go

@@ -4,11 +4,18 @@ import (
 	"encoding/json"
 	"github.com/cosmos/cosmos-sdk/client/context"
 	"github.com/cosmos/cosmos-sdk/codec"
+	sdk "github.com/cosmos/cosmos-sdk/types"
+	"github.com/cosmos/cosmos-sdk/types/module"
+	"github.com/cosmos/ethermint/x/evm/client/cli"
 	"github.com/cosmos/ethermint/x/evm/types"
 	"github.com/gorilla/mux"
 	"github.com/spf13/cobra"
+	abci "github.com/tendermint/tendermint/abci/types"
 )
 
+var _ module.AppModuleBasic = AppModuleBasic{}
+var _ module.AppModule = AppModule{}
+
 // app module Basics object
 type AppModuleBasic struct{}
 
@@ -42,10 +49,61 @@ func (AppModuleBasic) RegisterRESTRoutes(ctx context.CLIContext, rtr *mux.Router
 
 // Get the root query command of this module
 func (AppModuleBasic) GetQueryCmd(cdc *codec.Codec) *cobra.Command {
-	return nil // cli.GetQueryCmd(StoreKey, cdc)
+	return cli.GetQueryCmd(types.ModuleName, cdc)
 }
 
 // Get the root tx command of this module
 func (AppModuleBasic) GetTxCmd(cdc *codec.Codec) *cobra.Command {
 	return nil // cli.GetTxCmd(StoreKey, cdc)
 }
+
+type AppModule struct {
+	AppModuleBasic
+	keeper Keeper
+}
+
+// NewAppModule creates a new AppModule Object
+func NewAppModule(keeper Keeper) AppModule {
+	return AppModule{
+		AppModuleBasic: AppModuleBasic{},
+		keeper:         keeper,
+	}
+}
+
+func (AppModule) Name() string {
+	return types.ModuleName
+}
+
+func (am AppModule) RegisterInvariants(ir sdk.InvariantRegistry) {}
+
+func (am AppModule) Route() string {
+	return types.RouterKey
+}
+
+func (am AppModule) NewHandler() sdk.Handler {
+	return nil // NewHandler(am.keeper)
+}
+func (am AppModule) QuerierRoute() string {
+	return types.ModuleName
+}
+
+func (am AppModule) NewQuerierHandler() sdk.Querier {
+	return NewQuerier(am.keeper)
+}
+
+func (am AppModule) BeginBlock(_ sdk.Context, _ abci.RequestBeginBlock) {}
+
+func (am AppModule) EndBlock(sdk.Context, abci.RequestEndBlock) []abci.ValidatorUpdate {
+	return []abci.ValidatorUpdate{}
+}
+
+func (am AppModule) InitGenesis(ctx sdk.Context, data json.RawMessage) []abci.ValidatorUpdate {
+	var genesisState GenesisState
+	types.ModuleCdc.MustUnmarshalJSON(data, &genesisState)
+	return InitGenesis(ctx, am.keeper, genesisState)
+}
+
+func (am AppModule) ExportGenesis(ctx sdk.Context) json.RawMessage {
+	gs := ExportGenesis(ctx, am.keeper)
+	return types.ModuleCdc.MustMarshalJSON(gs)
+}

x/evm/querier.go

@@ -0,0 +1,105 @@
+package evm
+
+import (
+	"github.com/cosmos/cosmos-sdk/codec"
+	sdk "github.com/cosmos/cosmos-sdk/types"
+	"github.com/cosmos/ethermint/version"
+	"github.com/cosmos/ethermint/x/evm/types"
+	ethcmn "github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/common/hexutil"
+	abci "github.com/tendermint/tendermint/abci/types"
+	"math/big"
+)
+
+// Supported endpoints
+const (
+	QueryProtocolVersion = "protocolVersion"
+	QueryBalance         = "balance"
+	QueryBlockNumber     = "blockNumber"
+	QueryStorage         = "storage"
+	QueryCode            = "code"
+)
+
+// NewQuerier is the module level router for state queries
+func NewQuerier(keeper Keeper) sdk.Querier {
+	return func(ctx sdk.Context, path []string, req abci.RequestQuery) (res []byte, err sdk.Error) {
+		switch path[0] {
+		case QueryProtocolVersion:
+			return queryProtocolVersion(keeper)
+		case QueryBalance:
+			return queryBalance(ctx, path, keeper)
+		case QueryBlockNumber:
+			return queryBlockNumber(ctx, keeper)
+		case QueryStorage:
+			return queryStorage(ctx, path, keeper)
+		case QueryCode:
+			return queryCode(ctx, path, keeper)
+		default:
+			return nil, sdk.ErrUnknownRequest("unknown query endpoint")
+		}
+	}
+}
+
+func queryProtocolVersion(keeper Keeper) ([]byte, sdk.Error) {
+	vers := version.ProtocolVersion
+
+	res, err := codec.MarshalJSONIndent(keeper.cdc, vers)
+	if err != nil {
+		panic("could not marshal result to JSON")
+	}
+
+	return res, nil
+}
+
+func queryBalance(ctx sdk.Context, path []string, keeper Keeper) ([]byte, sdk.Error) {
+	addr := ethcmn.BytesToAddress([]byte(path[1]))
+	balance := keeper.GetBalance(ctx, addr)
+	hBalance := &hexutil.Big{}
+	err := hBalance.UnmarshalText(balance.Bytes())
+	if err != nil {
+		panic("could not marshal big.Int to hexutil.Big")
+	}
+
+	bRes := types.QueryResBalance{Balance: hBalance}
+	res, err := codec.MarshalJSONIndent(keeper.cdc, bRes)
+	if err != nil {
+		panic("could not marshal result to JSON")
+	}
+
+	return res, nil
+}
+
+func queryBlockNumber(ctx sdk.Context, keeper Keeper) ([]byte, sdk.Error) {
+	num := ctx.BlockHeight()
+	bnRes := types.QueryResBlockNumber{Number: big.NewInt(num)}
+	res, err := codec.MarshalJSONIndent(keeper.cdc, bnRes)
+	if err != nil {
+		panic("could not marshal result to JSON")
+	}
+
+	return res, nil
+}
+
+func queryStorage(ctx sdk.Context, path []string, keeper Keeper) ([]byte, sdk.Error) {
+	addr := ethcmn.BytesToAddress([]byte(path[1]))
+	key := ethcmn.BytesToHash([]byte(path[2]))
+	val := keeper.GetState(ctx, addr, key)
+	bRes := types.QueryResStorage{Value: val.Bytes()}
+	res, err := codec.MarshalJSONIndent(keeper.cdc, bRes)
+	if err != nil {
+		panic("could not marshal result to JSON")
+	}
+	return res, nil
+}
+
+func queryCode(ctx sdk.Context, path []string, keeper Keeper) ([]byte, sdk.Error) {
+	addr := ethcmn.BytesToAddress([]byte(path[1]))
+	code := keeper.GetCode(ctx, addr)
+	cRes := types.QueryResCode{Code: code}
+	res, err := codec.MarshalJSONIndent(keeper.cdc, cRes)
+	if err != nil {
+		panic("could not marshal result to JSON")
+	}
+
+	return res, nil
+}

x/evm/types/key.go

@@ -6,4 +6,6 @@ const (
 
 	EvmStoreKey = "evmstore"
 	EvmCodeKey  = "evmcode"
+
+	RouterKey = ModuleName
 )

x/evm/types/querier.go

@@ -0,0 +1,46 @@
+package types
+
+import (
+	"github.com/ethereum/go-ethereum/common/hexutil"
+	"math/big"
+)
+
+type QueryResProtocolVersion struct {
+	Version string `json:"result"`
+}
+
+func (q QueryResProtocolVersion) String() string {
+	return q.Version
+}
+
+type QueryResBalance struct {
+	Balance *hexutil.Big `json:"result"`
+}
+
+func (q QueryResBalance) String() string {
+	return q.Balance.String()
+}
+
+type QueryResBlockNumber struct {
+	Number *big.Int `json:"result"`
+}
+
+func (q QueryResBlockNumber) String() string {
+	return q.Number.String()
+}
+
+type QueryResStorage struct {
+	Value []byte `json:"value"`
+}
+
+func (q QueryResStorage) String() string {
+	return string(q.Value)
+}
+
+type QueryResCode struct {
+	Code []byte
+}
+
+func (q QueryResCode) String() string {
+	return string(q.Code)
+}