laconicd/tests/importer/importer_test.go

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2018-10-04 20:12:32 +00:00
package importer
import (
"flag"
"fmt"
"io"
"math/big"
"os"
"testing"
"time"
"github.com/tharsis/ethermint/app"
"github.com/stretchr/testify/require"
"github.com/stretchr/testify/suite"
sdk "github.com/cosmos/cosmos-sdk/types"
evmkeeper "github.com/tharsis/ethermint/x/evm/keeper"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/consensus/ethash"
ethcore "github.com/ethereum/go-ethereum/core"
ethtypes "github.com/ethereum/go-ethereum/core/types"
ethvm "github.com/ethereum/go-ethereum/core/vm"
"github.com/ethereum/go-ethereum/crypto"
ethparams "github.com/ethereum/go-ethereum/params"
ethrlp "github.com/ethereum/go-ethereum/rlp"
"github.com/tendermint/tendermint/abci/types"
"github.com/tendermint/tendermint/crypto/tmhash"
tmproto "github.com/tendermint/tendermint/proto/tendermint/types"
tmversion "github.com/tendermint/tendermint/proto/tendermint/version"
"github.com/tendermint/tendermint/version"
"github.com/tharsis/ethermint/crypto/ethsecp256k1"
)
var (
flagBlockchain string
rewardBig8 = big.NewInt(8)
rewardBig32 = big.NewInt(32)
)
func init() {
flag.StringVar(&flagBlockchain, "blockchain", "blockchain", "ethereum block export file (blocks to import)")
testing.Init()
flag.Parse()
}
type ImporterTestSuite struct {
suite.Suite
app *app.EthermintApp
ctx sdk.Context
}
/// DoSetupTest setup test environment, it uses`require.TestingT` to support both `testing.T` and `testing.B`.
func (suite *ImporterTestSuite) DoSetupTest(t require.TestingT) {
checkTx := false
suite.app = app.Setup(checkTx, nil)
// consensus key
priv, err := ethsecp256k1.GenerateKey()
require.NoError(t, err)
consAddress := sdk.ConsAddress(priv.PubKey().Address())
suite.ctx = suite.app.BaseApp.NewContext(checkTx, tmproto.Header{
Height: 1,
ChainID: "ethermint_9000-1",
Time: time.Now().UTC(),
ProposerAddress: consAddress.Bytes(),
Version: tmversion.Consensus{
Block: version.BlockProtocol,
},
LastBlockId: tmproto.BlockID{
Hash: tmhash.Sum([]byte("block_id")),
PartSetHeader: tmproto.PartSetHeader{
Total: 11,
Hash: tmhash.Sum([]byte("partset_header")),
},
},
AppHash: tmhash.Sum([]byte("app")),
DataHash: tmhash.Sum([]byte("data")),
EvidenceHash: tmhash.Sum([]byte("evidence")),
ValidatorsHash: tmhash.Sum([]byte("validators")),
NextValidatorsHash: tmhash.Sum([]byte("next_validators")),
ConsensusHash: tmhash.Sum([]byte("consensus")),
LastResultsHash: tmhash.Sum([]byte("last_result")),
})
}
func (suite *ImporterTestSuite) SetupTest() {
suite.DoSetupTest(suite.T())
}
func TestImporterTestSuite(t *testing.T) {
suite.Run(t, new(ImporterTestSuite))
}
func (suite *ImporterTestSuite) TestImportBlocks() {
chainContext := NewChainContext()
chainConfig := ethparams.MainnetChainConfig
vmConfig := ethvm.Config{}
// open blockchain export file
blockchainInput, err := os.Open(flagBlockchain)
suite.Require().Nil(err)
defer func() {
err := blockchainInput.Close()
suite.Require().NoError(err)
}()
stream := ethrlp.NewStream(blockchainInput, 0)
startTime := time.Now()
var block ethtypes.Block
for {
err := stream.Decode(&block)
if err == io.EOF {
break
}
suite.Require().NoError(err, "failed to decode block")
var (
usedGas = new(uint64)
gp = new(ethcore.GasPool).AddGas(block.GasLimit())
)
header := block.Header()
chainContext.Coinbase = header.Coinbase
chainContext.SetHeader(block.NumberU64(), header)
tmheader := suite.ctx.BlockHeader()
// fix due to that begin block can't have height 0
tmheader.Height = int64(block.NumberU64()) + 1
suite.app.BeginBlock(types.RequestBeginBlock{
Header: tmheader,
})
ctx := suite.app.NewContext(false, tmheader)
ctx = ctx.WithBlockHeight(tmheader.Height)
suite.app.EvmKeeper.WithContext(ctx)
if chainConfig.DAOForkSupport && chainConfig.DAOForkBlock != nil && chainConfig.DAOForkBlock.Cmp(block.Number()) == 0 {
applyDAOHardFork(suite.app.EvmKeeper)
}
for _, tx := range block.Transactions() {
receipt, gas, err := applyTransaction(
chainConfig, chainContext, nil, gp, suite.app.EvmKeeper, header, tx, usedGas, vmConfig,
)
suite.Require().NoError(err, "failed to apply tx at block %d; tx: %X; gas %d; receipt:%v", block.NumberU64(), tx.Hash(), gas, receipt)
suite.Require().NotNil(receipt)
}
// apply mining rewards
accumulateRewards(chainConfig, suite.app.EvmKeeper, header, block.Uncles())
// simulate BaseApp EndBlocker commitment
endBR := types.RequestEndBlock{Height: tmheader.Height}
suite.app.EndBlocker(ctx, endBR)
suite.app.Commit()
// block debugging output
if block.NumberU64() > 0 && block.NumberU64()%1000 == 0 {
fmt.Printf("processed block: %d (time so far: %v)\n", block.NumberU64(), time.Since(startTime))
}
}
}
// accumulateRewards credits the coinbase of the given block with the mining
// reward. The total reward consists of the static block reward and rewards for
// included uncles. The coinbase of each uncle block is also rewarded.
func accumulateRewards(
config *ethparams.ChainConfig, evmKeeper *evmkeeper.Keeper,
header *ethtypes.Header, uncles []*ethtypes.Header,
) {
// select the correct block reward based on chain progression
blockReward := ethash.FrontierBlockReward
if config.IsByzantium(header.Number) {
blockReward = ethash.ByzantiumBlockReward
}
// accumulate the rewards for the miner and any included uncles
reward := new(big.Int).Set(blockReward)
r := new(big.Int)
for _, uncle := range uncles {
r.Add(uncle.Number, rewardBig8)
r.Sub(r, header.Number)
r.Mul(r, blockReward)
r.Div(r, rewardBig8)
evmKeeper.AddBalance(uncle.Coinbase, r)
r.Div(blockReward, rewardBig32)
reward.Add(reward, r)
}
evmKeeper.AddBalance(header.Coinbase, reward)
}
// ApplyDAOHardFork modifies the state database according to the DAO hard-fork
// rules, transferring all balances of a set of DAO accounts to a single refund
// contract.
// Code is pulled from go-ethereum 1.9 because the StateDB interface does not include the
// SetBalance function implementation
// Ref: https://github.com/ethereum/go-ethereum/blob/52f2461774bcb8cdd310f86b4bc501df5b783852/consensus/misc/dao.go#L74
func applyDAOHardFork(evmKeeper *evmkeeper.Keeper) {
// Retrieve the contract to refund balances into
if !evmKeeper.Exist(ethparams.DAORefundContract) {
evmKeeper.CreateAccount(ethparams.DAORefundContract)
}
// Move every DAO account and extra-balance account funds into the refund contract
for _, addr := range ethparams.DAODrainList() {
evmKeeper.AddBalance(ethparams.DAORefundContract, evmKeeper.GetBalance(addr))
}
}
// ApplyTransaction attempts to apply a transaction to the given state database
// and uses the input parameters for its environment. It returns the receipt
// for the transaction, gas used and an error if the transaction failed,
// indicating the block was invalid.
// Function is also pulled from go-ethereum 1.9 because of the incompatible usage
// Ref: https://github.com/ethereum/go-ethereum/blob/52f2461774bcb8cdd310f86b4bc501df5b783852/core/state_processor.go#L88
func applyTransaction(
config *ethparams.ChainConfig, bc ethcore.ChainContext, author *common.Address,
gp *ethcore.GasPool, evmKeeper *evmkeeper.Keeper, header *ethtypes.Header,
tx *ethtypes.Transaction, usedGas *uint64, cfg ethvm.Config,
) (*ethtypes.Receipt, uint64, error) {
msg, err := tx.AsMessage(ethtypes.MakeSigner(config, header.Number), sdk.ZeroInt().BigInt())
if err != nil {
return nil, 0, err
}
// Create a new context to be used in the EVM environment
blockCtx := ethcore.NewEVMBlockContext(header, bc, author)
txCtx := ethcore.NewEVMTxContext(msg)
// Create a new environment which holds all relevant information
// about the transaction and calling mechanisms.
vmenv := ethvm.NewEVM(blockCtx, txCtx, evmKeeper, config, cfg)
// Apply the transaction to the current state (included in the env)
execResult, err := ethcore.ApplyMessage(vmenv, msg, gp)
if err != nil {
// NOTE: ignore vm execution error (eg: tx out of gas at block 51169) as we care only about state transition errors
return &ethtypes.Receipt{}, 0, nil
}
root := common.Hash{}.Bytes()
*usedGas += execResult.UsedGas
// Create a new receipt for the transaction, storing the intermediate root and gas used by the tx
// based on the eip phase, we're passing whether the root touch-delete accounts.
receipt := ethtypes.NewReceipt(root, execResult.Failed(), *usedGas)
receipt.TxHash = tx.Hash()
receipt.GasUsed = execResult.UsedGas
// if the transaction created a contract, store the creation address in the receipt.
if msg.To() == nil {
receipt.ContractAddress = crypto.CreateAddress(vmenv.TxContext.Origin, tx.Nonce())
}
// Set the receipt logs and create a bloom for filtering
receipt.Logs = evmKeeper.GetTxLogsTransient(tx.Hash())
receipt.Bloom = ethtypes.CreateBloom(ethtypes.Receipts{receipt})
receipt.BlockHash = header.Hash()
receipt.BlockNumber = header.Number
receipt.TransactionIndex = uint(evmKeeper.GetTxIndexTransient())
return receipt, execResult.UsedGas, err
}