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package l2
import (
"fmt"
"math/big"
"testing"
"github.com/ethereum-optimism/optimism/op-program/client/l2/test"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/core/rawdb"
"github.com/ethereum/go-ethereum/core/state"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/ethdb"
"github.com/ethereum/go-ethereum/ethdb/memorydb"
"github.com/ethereum/go-ethereum/params"
"github.com/stretchr/testify/require"
)
var (
userAccount = common.HexToAddress("0x1111")
codeAccount = common.HexToAddress("0x2222")
unknownAccount = common.HexToAddress("0x3333")
)
// Should implement the KeyValueStore API
var _ ethdb.KeyValueStore = (*OracleKeyValueStore)(nil)
func TestGet(t *testing.T) {
t.Run("IncorrectLengthKey", func(t *testing.T) {
oracle := test.NewStubStateOracle(t)
db := NewOracleBackedDB(oracle)
val, err := db.Get([]byte{1, 2, 3})
require.ErrorIs(t, err, ErrInvalidKeyLength)
require.Nil(t, val)
})
t.Run("KeyWithCodePrefix", func(t *testing.T) {
oracle := test.NewStubStateOracle(t)
db := NewOracleBackedDB(oracle)
key := common.HexToHash("0x12345678")
prefixedKey := append(rawdb.CodePrefix, key.Bytes()...)
expected := []byte{1, 2, 3}
oracle.Code[key] = expected
val, err := db.Get(prefixedKey)
require.NoError(t, err)
require.Equal(t, expected, val)
})
t.Run("NormalKeyThatHappensToStartWithCodePrefix", func(t *testing.T) {
oracle := test.NewStubStateOracle(t)
db := NewOracleBackedDB(oracle)
key := make([]byte, common.HashLength)
copy(rawdb.CodePrefix, key)
fmt.Println(key[0])
expected := []byte{1, 2, 3}
oracle.Data[common.BytesToHash(key)] = expected
val, err := db.Get(key)
require.NoError(t, err)
require.Equal(t, expected, val)
})
t.Run("KnownKey", func(t *testing.T) {
key := common.HexToHash("0xAA4488")
expected := []byte{2, 6, 3, 8}
oracle := test.NewStubStateOracle(t)
oracle.Data[key] = expected
db := NewOracleBackedDB(oracle)
val, err := db.Get(key.Bytes())
require.NoError(t, err)
require.Equal(t, expected, val)
})
}
func TestPut(t *testing.T) {
t.Run("NewKey", func(t *testing.T) {
oracle := test.NewStubStateOracle(t)
db := NewOracleBackedDB(oracle)
key := common.HexToHash("0xAA4488")
value := []byte{2, 6, 3, 8}
err := db.Put(key.Bytes(), value)
require.NoError(t, err)
actual, err := db.Get(key.Bytes())
require.NoError(t, err)
require.Equal(t, value, actual)
})
t.Run("ReplaceKey", func(t *testing.T) {
oracle := test.NewStubStateOracle(t)
db := NewOracleBackedDB(oracle)
key := common.HexToHash("0xAA4488")
value1 := []byte{2, 6, 3, 8}
value2 := []byte{1, 2, 3}
err := db.Put(key.Bytes(), value1)
require.NoError(t, err)
err = db.Put(key.Bytes(), value2)
require.NoError(t, err)
actual, err := db.Get(key.Bytes())
require.NoError(t, err)
require.Equal(t, value2, actual)
})
}
func TestSupportsStateDBOperations(t *testing.T) {
l2Genesis := createGenesis()
realDb := rawdb.NewDatabase(memorydb.New())
genesisBlock := l2Genesis.MustCommit(realDb)
loader := test.NewKvStateOracle(t, realDb)
assertStateDataAvailable(t, NewOracleBackedDB(loader), l2Genesis, genesisBlock)
}
func TestUpdateState(t *testing.T) {
l2Genesis := createGenesis()
oracle := test.NewStubStateOracle(t)
db := rawdb.NewDatabase(NewOracleBackedDB(oracle))
genesisBlock := l2Genesis.MustCommit(db)
assertStateDataAvailable(t, db, l2Genesis, genesisBlock)
statedb, err := state.New(genesisBlock.Root(), state.NewDatabase(rawdb.NewDatabase(db)), nil)
require.NoError(t, err)
statedb.SetBalance(userAccount, big.NewInt(50))
require.Equal(t, big.NewInt(50), statedb.GetBalance(userAccount))
statedb.SetNonce(userAccount, uint64(5))
require.Equal(t, uint64(5), statedb.GetNonce(userAccount))
statedb.SetBalance(unknownAccount, big.NewInt(60))
require.Equal(t, big.NewInt(60), statedb.GetBalance(unknownAccount))
statedb.SetCode(codeAccount, []byte{1})
require.Equal(t, []byte{1}, statedb.GetCode(codeAccount))
// Changes should be available under the new state root after committing
newRoot, err := statedb.Commit(false)
require.NoError(t, err)
err = statedb.Database().TrieDB().Commit(newRoot, true)
require.NoError(t, err)
statedb, err = state.New(newRoot, state.NewDatabase(rawdb.NewDatabase(db)), nil)
require.NoError(t, err)
require.Equal(t, big.NewInt(50), statedb.GetBalance(userAccount))
require.Equal(t, uint64(5), statedb.GetNonce(userAccount))
require.Equal(t, big.NewInt(60), statedb.GetBalance(unknownAccount))
require.Equal(t, []byte{1}, statedb.GetCode(codeAccount))
}
func createGenesis() *core.Genesis {
l2Genesis := &core.Genesis{
Config: ¶ms.ChainConfig{},
Difficulty: common.Big0,
ParentHash: common.Hash{},
BaseFee: big.NewInt(7),
Alloc: map[common.Address]core.GenesisAccount{
userAccount: {
Balance: big.NewInt(1_000_000_000_000_000_000),
Nonce: 10,
},
codeAccount: {
Balance: big.NewInt(100),
Code: []byte{5, 7, 8, 3, 4},
Storage: map[common.Hash]common.Hash{
common.HexToHash("0x01"): common.HexToHash("0x11"),
common.HexToHash("0x02"): common.HexToHash("0x12"),
common.HexToHash("0x03"): common.HexToHash("0x13"),
},
},
},
}
return l2Genesis
}
func assertStateDataAvailable(t *testing.T, db ethdb.KeyValueStore, l2Genesis *core.Genesis, genesisBlock *types.Block) {
statedb, err := state.New(genesisBlock.Root(), state.NewDatabase(rawdb.NewDatabase(db)), nil)
require.NoError(t, err)
for address, account := range l2Genesis.Alloc {
require.Equal(t, account.Balance, statedb.GetBalance(address))
require.Equal(t, account.Nonce, statedb.GetNonce(address))
require.Equal(t, common.BytesToHash(crypto.Keccak256(account.Code)), statedb.GetCodeHash(address))
require.Equal(t, account.Code, statedb.GetCode(address))
for key, value := range account.Storage {
require.Equal(t, value, statedb.GetState(address, key))
}
}
require.Equal(t, common.Hash{}, statedb.GetState(codeAccount, common.HexToHash("0x99")), "retrieve unset storage key")
require.Equal(t, common.Big0, statedb.GetBalance(unknownAccount), "unset account balance")
require.Equal(t, uint64(0), statedb.GetNonce(unknownAccount), "unset account balance")
require.Nil(t, statedb.GetCode(unknownAccount), "unset account code")
require.Equal(t, common.Hash{}, statedb.GetCodeHash(unknownAccount), "unset account code hash")
}