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package l2
import (
"math/big"
"testing"
"github.com/ethereum-optimism/optimism/op-chain-ops/genesis"
"github.com/ethereum-optimism/optimism/op-node/testlog"
"github.com/ethereum-optimism/optimism/op-program/client/l2/engineapi"
"github.com/ethereum-optimism/optimism/op-program/client/l2/engineapi/test"
l2test "github.com/ethereum-optimism/optimism/op-program/client/l2/test"
"github.com/ethereum-optimism/optimism/op-service/eth"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/common/hexutil"
"github.com/ethereum/go-ethereum/consensus/beacon"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/core/rawdb"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/log"
"github.com/ethereum/go-ethereum/params"
"github.com/stretchr/testify/require"
)
var fundedKey, _ = crypto.GenerateKey()
var fundedAddress = crypto.PubkeyToAddress(fundedKey.PublicKey)
var targetAddress = common.HexToAddress("0x001122334455")
func TestInitialState(t *testing.T) {
blocks, chain := setupOracleBackedChain(t, 5)
head := blocks[5]
require.Equal(t, head.Header(), chain.CurrentHeader())
require.Equal(t, head.Header(), chain.CurrentSafeBlock())
require.Equal(t, head.Header(), chain.CurrentFinalBlock())
}
func TestGetBlocks(t *testing.T) {
blocks, chain := setupOracleBackedChain(t, 5)
for i, block := range blocks {
blockNumber := uint64(i)
assertBlockDataAvailable(t, chain, block, blockNumber)
require.Equal(t, block.Hash(), chain.GetCanonicalHash(blockNumber), "get canonical hash for block %v", blockNumber)
}
}
func TestCanonicalHashNotFoundPastChainHead(t *testing.T) {
blocks, chain := setupOracleBackedChainWithLowerHead(t, 5, 3)
for i := 0; i <= 3; i++ {
require.Equal(t, blocks[i].Hash(), chain.GetCanonicalHash(uint64(i)))
require.Equal(t, blocks[i].Header(), chain.GetHeaderByNumber(uint64(i)))
}
for i := 4; i <= 5; i++ {
require.Equal(t, common.Hash{}, chain.GetCanonicalHash(uint64(i)))
require.Nil(t, chain.GetHeaderByNumber(uint64(i)))
}
}
func TestAppendToChain(t *testing.T) {
blocks, chain := setupOracleBackedChainWithLowerHead(t, 4, 3)
newBlock := blocks[4]
require.Nil(t, chain.GetBlock(newBlock.Hash(), newBlock.NumberU64()), "block unknown before being added")
require.NoError(t, chain.InsertBlockWithoutSetHead(newBlock))
require.Equal(t, blocks[3].Header(), chain.CurrentHeader(), "should not update chain head yet")
require.Equal(t, common.Hash{}, chain.GetCanonicalHash(uint64(4)), "not yet a canonical hash")
require.Nil(t, chain.GetHeaderByNumber(uint64(4)), "not yet a canonical header")
assertBlockDataAvailable(t, chain, newBlock, 4)
canonical, err := chain.SetCanonical(newBlock)
require.NoError(t, err)
require.Equal(t, newBlock.Hash(), canonical)
require.Equal(t, newBlock.Hash(), chain.GetCanonicalHash(uint64(4)), "get canonical hash for new head")
require.Equal(t, newBlock.Header(), chain.GetHeaderByNumber(uint64(4)), "get canonical header for new head")
}
func TestSetFinalized(t *testing.T) {
blocks, chain := setupOracleBackedChainWithLowerHead(t, 5, 0)
for _, block := range blocks[1:] {
require.NoError(t, chain.InsertBlockWithoutSetHead(block))
}
chain.SetFinalized(blocks[2].Header())
require.Equal(t, blocks[2].Header(), chain.CurrentFinalBlock())
}
func TestSetSafe(t *testing.T) {
blocks, chain := setupOracleBackedChainWithLowerHead(t, 5, 0)
for _, block := range blocks[1:] {
require.NoError(t, chain.InsertBlockWithoutSetHead(block))
}
chain.SetSafe(blocks[2].Header())
require.Equal(t, blocks[2].Header(), chain.CurrentSafeBlock())
}
func TestUpdateStateDatabaseWhenImportingBlock(t *testing.T) {
blocks, chain := setupOracleBackedChain(t, 3)
newBlock := createBlock(t, chain)
db, err := chain.StateAt(blocks[1].Root())
require.NoError(t, err)
balance := db.GetBalance(fundedAddress)
require.NotEqual(t, big.NewInt(0), balance, "should have balance at imported block")
require.NotEqual(t, blocks[1].Root(), newBlock.Root(), "block should have modified world state")
require.False(t, chain.HasBlockAndState(newBlock.Root(), newBlock.NumberU64()), "state from non-imported block should not be available")
err = chain.InsertBlockWithoutSetHead(newBlock)
require.NoError(t, err)
db, err = chain.StateAt(newBlock.Root())
require.NoError(t, err, "state should be available after importing")
balance = db.GetBalance(fundedAddress)
require.NotEqual(t, big.NewInt(0), balance, "should have balance from imported block")
}
func TestRejectBlockWithStateRootMismatch(t *testing.T) {
_, chain := setupOracleBackedChain(t, 1)
newBlock := createBlock(t, chain)
// Create invalid block by keeping the modified state root but exclude the transaction
invalidBlock := types.NewBlockWithHeader(newBlock.Header())
err := chain.InsertBlockWithoutSetHead(invalidBlock)
require.ErrorContains(t, err, "block root mismatch")
}
func TestGetHeaderByNumber(t *testing.T) {
t.Run("Forwards", func(t *testing.T) {
blocks, chain := setupOracleBackedChain(t, 10)
for _, block := range blocks {
result := chain.GetHeaderByNumber(block.NumberU64())
require.Equal(t, block.Header(), result)
}
})
t.Run("Reverse", func(t *testing.T) {
blocks, chain := setupOracleBackedChain(t, 10)
for i := len(blocks) - 1; i >= 0; i-- {
block := blocks[i]
result := chain.GetHeaderByNumber(block.NumberU64())
require.Equal(t, block.Header(), result)
}
})
t.Run("AppendedBlock", func(t *testing.T) {
_, chain := setupOracleBackedChain(t, 10)
// Append a block
newBlock := createBlock(t, chain)
require.NoError(t, chain.InsertBlockWithoutSetHead(newBlock))
_, err := chain.SetCanonical(newBlock)
require.NoError(t, err)
require.Equal(t, newBlock.Header(), chain.GetHeaderByNumber(newBlock.NumberU64()))
})
t.Run("AppendedBlockAfterLookup", func(t *testing.T) {
blocks, chain := setupOracleBackedChain(t, 10)
// Look up an early block to prime the block cache
require.Equal(t, blocks[0].Header(), chain.GetHeaderByNumber(blocks[0].NumberU64()))
// Append a block
newBlock := createBlock(t, chain)
require.NoError(t, chain.InsertBlockWithoutSetHead(newBlock))
_, err := chain.SetCanonical(newBlock)
require.NoError(t, err)
require.Equal(t, newBlock.Header(), chain.GetHeaderByNumber(newBlock.NumberU64()))
})
t.Run("AppendedMultipleBlocks", func(t *testing.T) {
blocks, chain := setupOracleBackedChainWithLowerHead(t, 5, 2)
// Append a few blocks
newBlock1 := blocks[3]
newBlock2 := blocks[4]
newBlock3 := blocks[5]
require.NoError(t, chain.InsertBlockWithoutSetHead(newBlock1))
require.NoError(t, chain.InsertBlockWithoutSetHead(newBlock2))
require.NoError(t, chain.InsertBlockWithoutSetHead(newBlock3))
_, err := chain.SetCanonical(newBlock3)
require.NoError(t, err)
require.Equal(t, newBlock3.Header(), chain.GetHeaderByNumber(newBlock3.NumberU64()), "Lookup block3")
require.Equal(t, newBlock2.Header(), chain.GetHeaderByNumber(newBlock2.NumberU64()), "Lookup block2")
require.Equal(t, newBlock1.Header(), chain.GetHeaderByNumber(newBlock1.NumberU64()), "Lookup block1")
})
}
func assertBlockDataAvailable(t *testing.T, chain *OracleBackedL2Chain, block *types.Block, blockNumber uint64) {
require.Equal(t, block, chain.GetBlockByHash(block.Hash()), "get block %v by hash", blockNumber)
require.Equal(t, block.Header(), chain.GetHeaderByHash(block.Hash()), "get header %v by hash", blockNumber)
require.Equal(t, block, chain.GetBlock(block.Hash(), blockNumber), "get block %v by hash and number", blockNumber)
require.Equal(t, block.Header(), chain.GetHeader(block.Hash(), blockNumber), "get header %v by hash and number", blockNumber)
require.True(t, chain.HasBlockAndState(block.Hash(), blockNumber), "has block and state for block %v", blockNumber)
}
func setupOracleBackedChain(t *testing.T, blockCount int) ([]*types.Block, *OracleBackedL2Chain) {
return setupOracleBackedChainWithLowerHead(t, blockCount, blockCount)
}
func setupOracleBackedChainWithLowerHead(t *testing.T, blockCount int, headBlockNumber int) ([]*types.Block, *OracleBackedL2Chain) {
logger := testlog.Logger(t, log.LvlDebug)
chainCfg, blocks, oracle := setupOracle(t, blockCount, headBlockNumber)
head := blocks[headBlockNumber].Hash()
stubOutput := eth.OutputV0{BlockHash: head}
chain, err := NewOracleBackedL2Chain(logger, oracle, chainCfg, common.Hash(eth.OutputRoot(&stubOutput)))
require.NoError(t, err)
return blocks, chain
}
func setupOracle(t *testing.T, blockCount int, headBlockNumber int) (*params.ChainConfig, []*types.Block, *l2test.StubBlockOracle) {
deployConfig := &genesis.DeployConfig{
L1ChainID: 900,
L2ChainID: 901,
L2BlockTime: 2,
FundDevAccounts: true,
L2GenesisBlockGasLimit: 30_000_000,
// Arbitrary non-zero difficulty in genesis.
// This is slightly weird for a chain starting post-merge but it happens so need to make sure it works
L2GenesisBlockDifficulty: (*hexutil.Big)(big.NewInt(100)),
}
l1Genesis, err := genesis.NewL1Genesis(deployConfig)
require.NoError(t, err)
l2Genesis, err := genesis.NewL2Genesis(deployConfig, l1Genesis.ToBlock())
require.NoError(t, err)
l2Genesis.Alloc[fundedAddress] = core.GenesisAccount{
Balance: big.NewInt(1_000_000_000_000_000_000),
Nonce: 0,
}
chainCfg := l2Genesis.Config
consensus := beacon.New(nil)
db := rawdb.NewMemoryDatabase()
// Set minimal amount of stuff to avoid nil references later
genesisBlock := l2Genesis.MustCommit(db)
blocks, _ := core.GenerateChain(chainCfg, genesisBlock, consensus, db, blockCount, func(i int, gen *core.BlockGen) {})
blocks = append([]*types.Block{genesisBlock}, blocks...)
var outputs []eth.Output
for _, block := range blocks {
outputs = append(outputs, ð.OutputV0{BlockHash: block.Hash()})
}
oracle := l2test.NewStubOracleWithBlocks(t, blocks[:headBlockNumber+1], outputs, db)
return chainCfg, blocks, oracle
}
func createBlock(t *testing.T, chain *OracleBackedL2Chain) *types.Block {
parent := chain.GetBlockByHash(chain.CurrentHeader().Hash())
parentDB, err := chain.StateAt(parent.Root())
require.NoError(t, err)
nonce := parentDB.GetNonce(fundedAddress)
config := chain.Config()
db := rawdb.NewDatabase(NewOracleBackedDB(chain.oracle))
blocks, _ := core.GenerateChain(config, parent, chain.Engine(), db, 1, func(i int, gen *core.BlockGen) {
rawTx := &types.DynamicFeeTx{
ChainID: config.ChainID,
Nonce: nonce,
To: &targetAddress,
GasTipCap: big.NewInt(0),
GasFeeCap: parent.BaseFee(),
Gas: 21_000,
Value: big.NewInt(1),
}
tx := types.MustSignNewTx(fundedKey, types.NewLondonSigner(config.ChainID), rawTx)
gen.AddTx(tx)
})
return blocks[0]
}
func TestEngineAPITests(t *testing.T) {
test.RunEngineAPITests(t, func(t *testing.T) engineapi.EngineBackend {
_, chain := setupOracleBackedChain(t, 0)
return chain
})
}