Adds AppModuleBasic and Genesis Functions (#62)

* Adds AppModuleBasic implementation and genesis functions

* Fixes  broken links

* Adds .idea/

* Adds starter for missing genesis funcs

* Completes AppModuleBasic interface

* Removes comment

Author: David Ansermino

.gitignore

@@ -14,3 +14,6 @@
 .glide/
 vendor/
 build/
+
+# Goland
+.idea/

app/ethermint.go

@@ -1,6 +1,7 @@
 package app
 
 import (
+	"github.com/cosmos/ethermint/x/evm"
 	"os"
 
 	bam "github.com/cosmos/cosmos-sdk/baseapp"
@@ -164,7 +165,7 @@ func (app *EthermintApp) initChainer(
 	_ sdk.Context, req abci.RequestInitChain,
 ) abci.ResponseInitChain {
 
-	var genesisState GenesisState
+	var genesisState evm.GenesisState
 	stateJSON := req.AppStateBytes
 
 	err := app.cdc.UnmarshalJSON(stateJSON, &genesisState)

app/genesis.go

@@ -0,0 +1,53 @@
+package evm
+
+import (
+	"fmt"
+	sdk "github.com/cosmos/cosmos-sdk/types"
+	"github.com/cosmos/ethermint/types"
+)
+
+type (
+	// GenesisState defines the application's genesis state. It contains all the
+	// information required and accounts to initialize the blockchain.
+	GenesisState struct {
+		Accounts []GenesisAccount `json:"accounts"`
+	}
+
+	// GenesisAccount defines an account to be initialized in the genesis state.
+	GenesisAccount struct {
+		Address sdk.AccAddress `json:"address"`
+		Coins   sdk.Coins      `json:"coins"`
+		Code    []byte         `json:"code,omitempty"`
+		Storage types.Storage  `json:"storage,omitempty"`
+	}
+)
+
+func ValidateGenesis(data GenesisState) error {
+	for _, acct := range data.Accounts {
+		if acct.Address == nil {
+			return fmt.Errorf("Invalid GenesisAccount Error: Missing Address")
+		}
+		if acct.Coins == nil {
+			return fmt.Errorf("Invalid GenesisAccount Error: Missing Coins")
+		}
+	}
+	return nil
+}
+
+func DefaultGenesisState() GenesisState {
+	return GenesisState{
+		Accounts: []GenesisAccount{},
+	}
+}
+
+// TODO: Implement these once keeper is established
+//func InitGenesis(ctx sdk.Context, keeper Keeper, data GenesisState) []abci.ValidatorUpdate {
+//	for _, record := range data.Accounts {
+//		// TODO: Add to keeper
+//	}
+//	return []abci.ValidatorUpdate{}
+//}
+//
+//func ExportGenesis(ctx sdk.Context, k Keeper) GenesisState {
+//	return GenesisState{Accounts: nil}
+//}

x/evm/genesis.go

@@ -0,0 +1,51 @@
+package evm
+
+import (
+	"encoding/json"
+	"github.com/cosmos/cosmos-sdk/client/context"
+	"github.com/cosmos/cosmos-sdk/codec"
+	"github.com/cosmos/ethermint/x/evm/types"
+	"github.com/gorilla/mux"
+	"github.com/spf13/cobra"
+)
+
+// app module Basics object
+type AppModuleBasic struct{}
+
+func (AppModuleBasic) Name() string {
+	return types.ModuleName
+}
+
+func (AppModuleBasic) RegisterCodec(cdc *codec.Codec) {
+	types.RegisterCodec(cdc)
+}
+
+func (AppModuleBasic) DefaultGenesis() json.RawMessage {
+	return types.ModuleCdc.MustMarshalJSON(DefaultGenesisState())
+}
+
+// Validation check of the Genesis
+func (AppModuleBasic) ValidateGenesis(bz json.RawMessage) error {
+	var data GenesisState
+	err := types.ModuleCdc.UnmarshalJSON(bz, &data)
+	if err != nil {
+		return err
+	}
+	// Once json successfully marshalled, passes along to genesis.go
+	return ValidateGenesis(data)
+}
+
+// Register rest routes
+func (AppModuleBasic) RegisterRESTRoutes(ctx context.CLIContext, rtr *mux.Router) {
+	//rpc.RegisterRoutes(ctx, rtr, StoreKey)
+}
+
+// Get the root query command of this module
+func (AppModuleBasic) GetQueryCmd(cdc *codec.Codec) *cobra.Command {
+	return nil // cli.GetQueryCmd(StoreKey, cdc)
+}
+
+// Get the root tx command of this module
+func (AppModuleBasic) GetTxCmd(cdc *codec.Codec) *cobra.Command {
+	return nil // cli.GetTxCmd(StoreKey, cdc)
+}

x/evm/module.go

@@ -2,15 +2,15 @@ package types
 
 import "github.com/cosmos/cosmos-sdk/codec"
 
-var msgCodec = codec.New()
+var ModuleCdc = codec.New()
 
 func init() {
 	cdc := codec.New()
 
 	RegisterCodec(cdc)
 	codec.RegisterCrypto(cdc)
 
-	msgCodec = cdc.Seal()
+	ModuleCdc = cdc.Seal()
 }
 
 // RegisterCodec registers concrete types and interfaces on the given codec.

x/evm/types/codec.go

@@ -0,0 +1,10 @@
+package types
+
+const (
+	// module name
+	ModuleName = "ethermint"
+
+	// TODO: Use this
+	// StoreKey to be used when creating the KVStore
+	StoreKey = ModuleName
+)

x/evm/types/key.go

@@ -124,12 +124,12 @@ func TestMsgEthereumTxAmino(t *testing.T) {
 	addr := GenerateEthAddress()
 	msg := NewEthereumTxMsg(0, addr, nil, 100000, nil, []byte("test"))
 
-	raw, err := msgCodec.MarshalBinaryBare(msg)
+	raw, err := ModuleCdc.MarshalBinaryBare(msg)
 	require.NoError(t, err)
 
 	var msg2 EthereumTxMsg
 
-	err = msgCodec.UnmarshalBinaryBare(raw, &msg2)
+	err = ModuleCdc.UnmarshalBinaryBare(raw, &msg2)
 	require.NoError(t, err)
 	require.Equal(t, msg.Data, msg2.Data)
 }