// Copyright 2016 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package light
import (
"bytes"
"context"
"errors"
"math/big"
"testing"
"time"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/common/math"
"github.com/ethereum/go-ethereum/consensus/ethash"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/core/state"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/core/vm"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/ethdb"
"github.com/ethereum/go-ethereum/event"
"github.com/ethereum/go-ethereum/params"
"github.com/ethereum/go-ethereum/rlp"
"github.com/ethereum/go-ethereum/trie"
)
var (
testBankKey, _ = crypto.HexToECDSA("b71c71a67e1177ad4e901695e1b4b9ee17ae16c6668d313eac2f96dbcda3f291")
testBankAddress = crypto.PubkeyToAddress(testBankKey.PublicKey)
testBankFunds = big.NewInt(100000000)
acc1Key, _ = crypto.HexToECDSA("8a1f9a8f95be41cd7ccb6168179afb4504aefe388d1e14474d32c45c72ce7b7a")
acc2Key, _ = crypto.HexToECDSA("49a7b37aa6f6645917e7b807e9d1c00d4fa71f18343b0d4122a4d2df64dd6fee")
acc1Addr = crypto.PubkeyToAddress(acc1Key.PublicKey)
acc2Addr = crypto.PubkeyToAddress(acc2Key.PublicKey)
testContractCode = common.Hex2Bytes("606060405260cc8060106000396000f360606040526000357c01000000000000000000000000000000000000000000000000000000009004806360cd2685146041578063c16431b914606b57603f565b005b6055600480803590602001909190505060a9565b6040518082815260200191505060405180910390f35b60886004808035906020019091908035906020019091905050608a565b005b80600060005083606481101560025790900160005b50819055505b5050565b6000600060005082606481101560025790900160005b5054905060c7565b91905056")
testContractAddr common.Address
bigTxGas = new(big.Int).SetUint64(params.TxGas)
)
type testOdr struct {
OdrBackend
sdb, ldb ethdb.Database
disable bool
}
func (odr *testOdr) Database() ethdb.Database {
return odr.ldb
}
var ErrOdrDisabled = errors.New("ODR disabled")
func (odr *testOdr) Retrieve(ctx context.Context, req OdrRequest) error {
if odr.disable {
return ErrOdrDisabled
}
switch req := req.(type) {
case *BlockRequest:
req.Rlp = core.GetBodyRLP(odr.sdb, req.Hash, core.GetBlockNumber(odr.sdb, req.Hash))
case *ReceiptsRequest:
req.Receipts = core.GetBlockReceipts(odr.sdb, req.Hash, core.GetBlockNumber(odr.sdb, req.Hash))
case *TrieRequest:
t, _ := trie.New(req.Id.Root, odr.sdb)
req.Proof = t.Prove(req.Key)
case *CodeRequest:
req.Data, _ = odr.sdb.Get(req.Hash[:])
}
req.StoreResult(odr.ldb)
return nil
}
type odrTestFn func(ctx context.Context, db ethdb.Database, bc *core.BlockChain, lc *LightChain, bhash common.Hash) ([]byte, error)
func TestOdrGetBlockLes1(t *testing.T) { testChainOdr(t, 1, odrGetBlock) }
func odrGetBlock(ctx context.Context, db ethdb.Database, bc *core.BlockChain, lc *LightChain, bhash common.Hash) ([]byte, error) {
var block *types.Block
if bc != nil {
block = bc.GetBlockByHash(bhash)
} else {
block, _ = lc.GetBlockByHash(ctx, bhash)
}
if block == nil {
return nil, nil
}
rlp, _ := rlp.EncodeToBytes(block)
return rlp, nil
}
func TestOdrGetReceiptsLes1(t *testing.T) { testChainOdr(t, 1, odrGetReceipts) }
func odrGetReceipts(ctx context.Context, db ethdb.Database, bc *core.BlockChain, lc *LightChain, bhash common.Hash) ([]byte, error) {
var receipts types.Receipts
if bc != nil {
receipts = core.GetBlockReceipts(db, bhash, core.GetBlockNumber(db, bhash))
} else {
receipts, _ = GetBlockReceipts(ctx, lc.Odr(), bhash, core.GetBlockNumber(db, bhash))
}
if receipts == nil {
return nil, nil
}
rlp, _ := rlp.EncodeToBytes(receipts)
return rlp, nil
}
func TestOdrAccountsLes1(t *testing.T) { testChainOdr(t, 1, odrAccounts) }
func odrAccounts(ctx context.Context, db ethdb.Database, bc *core.BlockChain, lc *LightChain, bhash common.Hash) ([]byte, error) {
dummyAddr := common.HexToAddress("1234567812345678123456781234567812345678")
acc := []common.Address{testBankAddress, acc1Addr, acc2Addr, dummyAddr}
var st *state.StateDB
if bc == nil {
header := lc.GetHeaderByHash(bhash)
st = NewState(ctx, header, lc.Odr())
} else {
header := bc.GetHeaderByHash(bhash)
st, _ = state.New(header.Root, state.NewDatabase(db))
}
var res []byte
for _, addr := range acc {
bal := st.GetBalance(addr)
rlp, _ := rlp.EncodeToBytes(bal)
res = append(res, rlp...)
}
return res, st.Error()
}
func TestOdrContractCallLes1(t *testing.T) { testChainOdr(t, 1, odrContractCall) }
type callmsg struct {
types.Message
}
func (callmsg) CheckNonce() bool { return false }
func odrContractCall(ctx context.Context, db ethdb.Database, bc *core.BlockChain, lc *LightChain, bhash common.Hash) ([]byte, error) {
data := common.Hex2Bytes("60CD26850000000000000000000000000000000000000000000000000000000000000000")
config := params.TestChainConfig
var res []byte
for i := 0; i < 3; i++ {
data[35] = byte(i)
var (
st *state.StateDB
header *types.Header
chain core.ChainContext
)
if bc == nil {
chain = lc
header = lc.GetHeaderByHash(bhash)
st = NewState(ctx, header, lc.Odr())
} else {
chain = bc
header = bc.GetHeaderByHash(bhash)
st, _ = state.New(header.Root, state.NewDatabase(db))
}
// Perform read-only call.
st.SetBalance(testBankAddress, math.MaxBig256)
msg := callmsg{types.NewMessage(testBankAddress, &testContractAddr, 0, new(big.Int), big.NewInt(1000000), new(big.Int), data, false)}
context := core.NewEVMContext(msg, header, chain, nil)
vmenv := vm.NewEVM(context, st, config, vm.Config{})
gp := new(core.GasPool).AddGas(math.MaxBig256)
ret, _, _ := core.ApplyMessage(vmenv, msg, gp)
res = append(res, ret...)
if st.Error() != nil {
return res, st.Error()
}
}
return res, nil
}
func testChainGen(i int, block *core.BlockGen) {
signer := types.HomesteadSigner{}
switch i {
case 0:
// In block 1, the test bank sends account #1 some ether.
tx, _ := types.SignTx(types.NewTransaction(block.TxNonce(testBankAddress), acc1Addr, big.NewInt(10000), bigTxGas, nil, nil), signer, testBankKey)
block.AddTx(tx)
case 1:
// In block 2, the test bank sends some more ether to account #1.
// acc1Addr passes it on to account #2.
// acc1Addr creates a test contract.
tx1, _ := types.SignTx(types.NewTransaction(block.TxNonce(testBankAddress), acc1Addr, big.NewInt(1000), bigTxGas, nil, nil), signer, testBankKey)
nonce := block.TxNonce(acc1Addr)
tx2, _ := types.SignTx(types.NewTransaction(nonce, acc2Addr, big.NewInt(1000), bigTxGas, nil, nil), signer, acc1Key)
nonce++
tx3, _ := types.SignTx(types.NewContractCreation(nonce, big.NewInt(0), big.NewInt(1000000), big.NewInt(0), testContractCode), signer, acc1Key)
testContractAddr = crypto.CreateAddress(acc1Addr, nonce)
block.AddTx(tx1)
block.AddTx(tx2)
block.AddTx(tx3)
case 2:
// Block 3 is empty but was mined by account #2.
block.SetCoinbase(acc2Addr)
block.SetExtra([]byte("yeehaw"))
data := common.Hex2Bytes("C16431B900000000000000000000000000000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000000000001")
tx, _ := types.SignTx(types.NewTransaction(block.TxNonce(testBankAddress), testContractAddr, big.NewInt(0), big.NewInt(100000), nil, data), signer, testBankKey)
block.AddTx(tx)
case 3:
// Block 4 includes blocks 2 and 3 as uncle headers (with modified extra data).
b2 := block.PrevBlock(1).Header()
b2.Extra = []byte("foo")
block.AddUncle(b2)
b3 := block.PrevBlock(2).Header()
b3.Extra = []byte("foo")
block.AddUncle(b3)
data := common.Hex2Bytes("C16431B900000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000002")
tx, _ := types.SignTx(types.NewTransaction(block.TxNonce(testBankAddress), testContractAddr, big.NewInt(0), big.NewInt(100000), nil, data), signer, testBankKey)
block.AddTx(tx)
}
}
func testChainOdr(t *testing.T, protocol int, fn odrTestFn) {
var (
evmux = new(event.TypeMux)
sdb, _ = ethdb.NewMemDatabase()
ldb, _ = ethdb.NewMemDatabase()
gspec = core.Genesis{Alloc: core.GenesisAlloc{testBankAddress: {Balance: testBankFunds}}}
genesis = gspec.MustCommit(sdb)
)
gspec.MustCommit(ldb)
// Assemble the test environment
blockchain, _ := core.NewBlockChain(sdb, params.TestChainConfig, ethash.NewFullFaker(), evmux, vm.Config{})
gchain, _ := core.GenerateChain(params.TestChainConfig, genesis, sdb, 4, testChainGen)
if _, err := blockchain.InsertChain(gchain); err != nil {
t.Fatal(err)
}
odr := &testOdr{sdb: sdb, ldb: ldb}
lightchain, err := NewLightChain(odr, params.TestChainConfig, ethash.NewFullFaker(), evmux)
if err != nil {
t.Fatal(err)
}
headers := make([]*types.Header, len(gchain))
for i, block := range gchain {
headers[i] = block.Header()
}
if _, err := lightchain.InsertHeaderChain(headers, 1); err != nil {
t.Fatal(err)
}
test := func(expFail int) {
for i := uint64(0); i <= blockchain.CurrentHeader().Number.Uint64(); i++ {
bhash := core.GetCanonicalHash(sdb, i)
b1, err := fn(NoOdr, sdb, blockchain, nil, bhash)
if err != nil {
t.Fatalf("error in full-node test for block %d: %v", i, err)
}
ctx, cancel := context.WithTimeout(context.Background(), 200*time.Millisecond)
defer cancel()
exp := i < uint64(expFail)
b2, err := fn(ctx, ldb, nil, lightchain, bhash)
if err != nil && exp {
t.Errorf("error in ODR test for block %d: %v", i, err)
}
eq := bytes.Equal(b1, b2)
if exp && !eq {
t.Errorf("ODR test output for block %d doesn't match full node", i)
}
}
}
// expect retrievals to fail (except genesis block) without a les peer
t.Log("checking without ODR")
odr.disable = true
test(1)
// expect all retrievals to pass with ODR enabled
t.Log("checking with ODR")
odr.disable = false
test(len(gchain))
// still expect all retrievals to pass, now data should be cached locally
t.Log("checking without ODR, should be cached")
odr.disable = true
test(len(gchain))
}
