From fb8529d5b99b09586fc115dfda5c45c5e518d312 Mon Sep 17 00:00:00 2001
From: Aleksandr Bezobchuk <alex@tendermint.com>
Date: Thu, 4 Oct 2018 16:12:32 -0400
Subject: [PATCH] WIP: Import unit test

---
 importer/importer_test.go | 175 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 175 insertions(+)
 create mode 100644 importer/importer_test.go

diff --git a/importer/importer_test.go b/importer/importer_test.go
new file mode 100644
index 000000000..cb966c516
--- /dev/null
+++ b/importer/importer_test.go
@@ -0,0 +1,175 @@
+package importer
+
+import (
+	"flag"
+	"fmt"
+	"os"
+	"sort"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+
+	"github.com/cosmos/cosmos-sdk/store"
+	sdk "github.com/cosmos/cosmos-sdk/types"
+	"github.com/cosmos/cosmos-sdk/wire"
+	"github.com/cosmos/cosmos-sdk/x/auth"
+
+	"github.com/cosmos/ethermint/state"
+	"github.com/cosmos/ethermint/types"
+	"github.com/cosmos/ethermint/x/bank"
+
+	abci "github.com/tendermint/tendermint/abci/types"
+	dbm "github.com/tendermint/tendermint/libs/db"
+	tmlog "github.com/tendermint/tendermint/libs/log"
+
+	ethcmn "github.com/ethereum/go-ethereum/common"
+	ethcore "github.com/ethereum/go-ethereum/core"
+)
+
+var (
+	datadir    string
+	blockchain string
+
+	miner501    = ethcmn.HexToAddress("0x35e8e5dC5FBd97c5b421A80B596C030a2Be2A04D")
+	genInvestor = ethcmn.HexToAddress("0x756F45E3FA69347A9A973A725E3C98bC4db0b5a0")
+
+	accKey     = sdk.NewKVStoreKey("acc")
+	storageKey = sdk.NewKVStoreKey("storage")
+	codeKey    = sdk.NewKVStoreKey("code")
+
+	logger = tmlog.NewNopLogger()
+)
+
+func init() {
+	flag.StringVar(&datadir, "datadir", "", "test data directory for state storage")
+	flag.StringVar(&blockchain, "blockchain", "data/blockchain", "ethereum block export file (blocks to import)")
+	flag.Parse()
+}
+
+func newTestCodec() *wire.Codec {
+	codec := wire.NewCodec()
+
+	types.RegisterWire(codec)
+	wire.RegisterCrypto(codec)
+
+	return codec
+}
+
+func createAndTestGenesis(t *testing.T, cms sdk.CommitMultiStore, am auth.AccountMapper) {
+	genBlock := ethcore.DefaultGenesisBlock()
+	ms := cms.CacheMultiStore()
+	ctx := sdk.NewContext(ms, abci.Header{}, false, logger)
+
+	stateDB, err := state.NewCommitStateDB(ctx, am, storageKey, codeKey)
+	require.NoError(t, err, "failed to create a StateDB instance")
+
+	// sort the addresses and insertion of key/value pairs matters
+	genAddrs := make([]string, len(genBlock.Alloc))
+	i := 0
+	for addr := range genBlock.Alloc {
+		genAddrs[i] = addr.String()
+		i++
+	}
+
+	sort.Strings(genAddrs)
+
+	for _, addrStr := range genAddrs {
+		addr := ethcmn.HexToAddress(addrStr)
+		acc := genBlock.Alloc[addr]
+
+		stateDB.AddBalance(addr, acc.Balance)
+		stateDB.SetCode(addr, acc.Code)
+		stateDB.SetNonce(addr, acc.Nonce)
+
+		for key, value := range acc.Storage {
+			stateDB.SetState(addr, key, value)
+		}
+	}
+
+	// get balance of one of the genesis account having 200 ETH
+	b := stateDB.GetBalance(genInvestor)
+	require.Equal(t, "200000000000000000000", b.String())
+
+	// commit the stateDB with 'false' to delete empty objects
+	//
+	// NOTE: Commit does not yet return the intra merkle root (version)
+	_, err = stateDB.Commit(false)
+	require.NoError(t, err)
+
+	// persist multi-store cache state
+	ms.Write()
+
+	// persist multi-store root state
+	commitID := cms.Commit()
+	require.Equal(t, "F162678AD57BBE352BE0CFCFCD90E394C4781D31", fmt.Sprintf("%X", commitID.Hash))
+
+	// verify account mapper state
+	genAcc := am.GetAccount(ctx, sdk.AccAddress(genInvestor.Bytes()))
+	require.NotNil(t, genAcc)
+	require.Equal(t, sdk.NewIntFromBigInt(b), genAcc.GetCoins().AmountOf(bank.DenomEthereum))
+}
+
+func TestImportBlocks(t *testing.T) {
+	if datadir == "" {
+		datadir = os.TempDir()
+	}
+
+	db := dbm.NewDB("state", dbm.LevelDBBackend, datadir)
+
+	defer func() {
+		db.Close()
+		os.RemoveAll(datadir)
+	}()
+
+	// create logger, codec and root multi-store
+	cdc := newTestCodec()
+
+	cms := store.NewCommitMultiStore(db)
+
+	// create account mapper
+	am := auth.NewAccountMapper(
+		cdc,
+		accKey,
+		types.ProtoBaseAccount,
+	)
+
+	// mount stores
+	keys := []*sdk.KVStoreKey{accKey, storageKey, codeKey}
+	for _, key := range keys {
+		cms.MountStoreWithDB(key, sdk.StoreTypeIAVL, nil)
+	}
+
+	// load latest version (root)
+	err := cms.LoadLatestVersion()
+	require.NoError(t, err)
+
+	// set and test genesis block
+	createAndTestGenesis(t, cms, am)
+
+	// // process blocks
+	// for block := range blocks {
+	// 	// Create a cached-wrapped multi-store based on the commit multi-store and
+	// 	// create a new context based off of that.
+	// 	ms := cms.CacheMultiStore()
+	// 	ctx := sdk.NewContext(ms, abci.Header{}, false, logger)
+
+	// 	// For each transaction, create a new cache-wrapped multi-store based off of
+	// 	// the existing cache-wrapped multi-store in to create a transient store in
+	// 	// case processing the tx fails.
+	// 	for tx := range block.txs {
+	// 		msCache := ms.CacheMultiStore()
+	// 		ctx = ctx.WithMultiStore(msCache)
+
+	// 		// apply tx
+
+	// 		// check error
+	// 		if err != nil {
+	// 			msCache.Write()
+	// 		}
+	// 	}
+
+	// 	// commit
+	// 	ms.Write()
+	// 	cms.Commit()
+	// }
+}