testcases for trust protocol (#742)

eth/protocols/trust/handler_test.go

@@ -0,0 +1,270 @@
+package trust
+
+import (
+	"math/big"
+	"testing"
+
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/consensus/clique"
+	"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/core/vm"
+	"github.com/ethereum/go-ethereum/crypto"
+	"github.com/ethereum/go-ethereum/ethdb"
+	"github.com/ethereum/go-ethereum/p2p"
+	"github.com/ethereum/go-ethereum/p2p/enode"
+	"github.com/ethereum/go-ethereum/params"
+)
+
+var (
+	// testKey is a private key to use for funding a tester account.
+	testKey, _ = crypto.HexToECDSA("b71c71a67e1177ad4e901695e1b4b9ee17ae16c6668d313eac2f96dbcda3f291")
+
+	// testAddr is the Ethereum address of the tester account.
+	testAddr = crypto.PubkeyToAddress(testKey.PublicKey)
+)
+
+// testBackend is a mock implementation of the live Ethereum message handler. Its
+// purpose is to allow testing the request/reply workflows and wire serialization
+// in the `eth` protocol without actually doing any data processing.
+type testBackend struct {
+	db     ethdb.Database
+	chain  *core.BlockChain
+	txpool *core.TxPool
+}
+
+// newTestBackend creates an empty chain and wraps it into a mock backend.
+func newTestBackend(blocks int) *testBackend {
+	return newTestBackendWithGenerator(blocks)
+}
+
+// newTestBackend creates a chain with a number of explicitly defined blocks and
+// wraps it into a mock backend.
+func newTestBackendWithGenerator(blocks int) *testBackend {
+	signer := types.HomesteadSigner{}
+	db := rawdb.NewMemoryDatabase()
+	engine := clique.New(params.AllCliqueProtocolChanges.Clique, db)
+	genspec := &core.Genesis{
+		//Config:    params.TestChainConfig,
+		ExtraData: make([]byte, 32+common.AddressLength+65),
+		Alloc:     core.GenesisAlloc{testAddr: {Balance: big.NewInt(100000000000000000)}},
+	}
+	copy(genspec.ExtraData[32:], testAddr[:])
+	genesis := genspec.MustCommit(db)
+
+	chain, _ := core.NewBlockChain(db, nil, params.AllCliqueProtocolChanges, engine, vm.Config{}, nil, nil)
+	generator := func(i int, block *core.BlockGen) {
+		// The chain maker doesn't have access to a chain, so the difficulty will be
+		// lets unset (nil). Set it here to the correct value.
+		// block.SetCoinbase(testAddr)
+		block.SetDifficulty(big.NewInt(2))
+
+		// We want to simulate an empty middle block, having the same state as the
+		// first one. The last is needs a state change again to force a reorg.
+		tx, err := types.SignTx(types.NewTransaction(block.TxNonce(testAddr), common.Address{0x01}, big.NewInt(1), params.TxGas, nil, nil), signer, testKey)
+		if err != nil {
+			panic(err)
+		}
+		block.AddTxWithChain(chain, tx)
+	}
+
+	bs, _ := core.GenerateChain(params.AllCliqueProtocolChanges, genesis, engine, db, blocks, generator)
+	for i, block := range bs {
+		header := block.Header()
+		if i > 0 {
+			header.ParentHash = bs[i-1].Hash()
+		}
+		header.Extra = make([]byte, 32+65)
+		header.Difficulty = big.NewInt(2)
+
+		sig, _ := crypto.Sign(clique.SealHash(header).Bytes(), testKey)
+		copy(header.Extra[len(header.Extra)-65:], sig)
+		bs[i] = block.WithSeal(header)
+	}
+
+	if _, err := chain.InsertChain(bs); err != nil {
+		panic(err)
+	}
+
+	txconfig := core.DefaultTxPoolConfig
+	txconfig.Journal = "" // Don't litter the disk with test journals
+
+	return &testBackend{
+		db:     db,
+		chain:  chain,
+		txpool: core.NewTxPool(txconfig, params.AllCliqueProtocolChanges, chain),
+	}
+}
+
+// close tears down the transaction pool and chain behind the mock backend.
+func (b *testBackend) close() {
+	b.txpool.Stop()
+	b.chain.Stop()
+}
+
+func (b *testBackend) Chain() *core.BlockChain { return b.chain }
+
+func (b *testBackend) RunPeer(peer *Peer, handler Handler) error {
+	// Normally the backend would do peer mainentance and handshakes. All that
+	// is omitted and we will just give control back to the handler.
+	return handler(peer)
+}
+func (b *testBackend) PeerInfo(enode.ID) interface{} { panic("not implemented") }
+
+func (b *testBackend) Handle(*Peer, Packet) error {
+	panic("data processing tests should be done in the handler package")
+}
+
+func TestRequestRoot(t *testing.T) { testRequestRoot(t, Trust1) }
+
+func testRequestRoot(t *testing.T, protocol uint) {
+	t.Parallel()
+
+	blockNum := 1032 // The latest 1024 blocks' DiffLayer will be cached.
+	backend := newTestBackend(blockNum)
+	defer backend.close()
+
+	peer, _ := newTestPeer("peer", protocol, backend)
+	defer peer.close()
+
+	pairs := []struct {
+		req RootRequestPacket
+		res RootResponsePacket
+	}{
+		{
+			req: RootRequestPacket{
+				RequestId:   1,
+				BlockNumber: 1,
+			},
+			res: RootResponsePacket{
+				RequestId:   1,
+				Status:      types.StatusPartiallyVerified,
+				BlockNumber: 1,
+				Extra:       defaultExtra,
+			},
+		},
+		{
+			req: RootRequestPacket{
+				RequestId:   2,
+				BlockNumber: 128,
+			},
+			res: RootResponsePacket{
+				RequestId:   2,
+				Status:      types.StatusFullVerified,
+				BlockNumber: 128,
+				Extra:       defaultExtra,
+			},
+		},
+		{
+			req: RootRequestPacket{
+				RequestId:   3,
+				BlockNumber: 128,
+				BlockHash:   types.EmptyRootHash,
+				DiffHash:    types.EmptyRootHash,
+			},
+			res: RootResponsePacket{
+				RequestId:   3,
+				Status:      types.StatusImpossibleFork,
+				BlockNumber: 128,
+				BlockHash:   types.EmptyRootHash,
+				Root:        common.Hash{},
+				Extra:       defaultExtra,
+			},
+		},
+		{
+			req: RootRequestPacket{
+				RequestId:   4,
+				BlockNumber: 128,
+				DiffHash:    types.EmptyRootHash,
+			},
+			res: RootResponsePacket{
+				RequestId:   4,
+				Status:      types.StatusDiffHashMismatch,
+				BlockNumber: 128,
+				Root:        common.Hash{},
+				Extra:       defaultExtra,
+			},
+		},
+		{
+			req: RootRequestPacket{
+				RequestId:   5,
+				BlockNumber: 1024,
+			},
+			res: RootResponsePacket{
+				RequestId:   5,
+				Status:      types.StatusFullVerified,
+				BlockNumber: 1024,
+				Extra:       defaultExtra,
+			},
+		},
+		{
+			req: RootRequestPacket{
+				RequestId:   6,
+				BlockNumber: 1024,
+				BlockHash:   types.EmptyRootHash,
+				DiffHash:    types.EmptyRootHash,
+			},
+			res: RootResponsePacket{
+				RequestId:   6,
+				Status:      types.StatusPossibleFork,
+				BlockNumber: 1024,
+				BlockHash:   types.EmptyRootHash,
+				Root:        common.Hash{},
+				Extra:       defaultExtra,
+			},
+		},
+		{
+			req: RootRequestPacket{
+				RequestId:   7,
+				BlockNumber: 1033,
+				BlockHash:   types.EmptyRootHash,
+				DiffHash:    types.EmptyRootHash,
+			},
+			res: RootResponsePacket{
+				RequestId:   7,
+				Status:      types.StatusBlockNewer,
+				BlockNumber: 1033,
+				BlockHash:   types.EmptyRootHash,
+				Root:        common.Hash{},
+				Extra:       defaultExtra,
+			},
+		},
+		{
+			req: RootRequestPacket{
+				RequestId:   8,
+				BlockNumber: 1044,
+				BlockHash:   types.EmptyRootHash,
+				DiffHash:    types.EmptyRootHash,
+			},
+			res: RootResponsePacket{
+				RequestId:   8,
+				Status:      types.StatusBlockTooNew,
+				BlockNumber: 1044,
+				BlockHash:   types.EmptyRootHash,
+				Root:        common.Hash{},
+				Extra:       defaultExtra,
+			},
+		},
+	}
+
+	for idx, pair := range pairs {
+		header := backend.Chain().GetHeaderByNumber(pair.req.BlockNumber)
+		if header != nil {
+			if pair.res.Status.Code&0xFF00 == types.StatusVerified.Code {
+				pair.req.BlockHash = header.Hash()
+				pair.req.DiffHash, _ = core.CalculateDiffHash(backend.Chain().GetTrustedDiffLayer(header.Hash()))
+				pair.res.BlockHash = pair.req.BlockHash
+				pair.res.Root = header.Root
+			} else if pair.res.Status.Code == types.StatusDiffHashMismatch.Code {
+				pair.req.BlockHash = header.Hash()
+				pair.res.BlockHash = pair.req.BlockHash
+			}
+		}
+
+		p2p.Send(peer.app, RequestRootMsg, pair.req)
+		if err := p2p.ExpectMsg(peer.app, RespondRootMsg, pair.res); err != nil {
+			t.Errorf("test %d: root response not expected: %v", idx, err)
+		}
+	}
+}

eth/protocols/trust/peer_test.go

@@ -0,0 +1,42 @@
+package trust
+
+import (
+	"math/rand"
+
+	"github.com/ethereum/go-ethereum/p2p"
+	"github.com/ethereum/go-ethereum/p2p/enode"
+)
+
+// testPeer is a simulated peer to allow testing direct network calls.
+type testPeer struct {
+	*Peer
+
+	net p2p.MsgReadWriter // Network layer reader/writer to simulate remote messaging
+	app *p2p.MsgPipeRW    // Application layer reader/writer to simulate the local side
+}
+
+// newTestPeer creates a new peer registered at the given data backend.
+func newTestPeer(name string, version uint, backend Backend) (*testPeer, <-chan error) {
+	// Create a message pipe to communicate through
+	app, net := p2p.MsgPipe()
+
+	// Start the peer on a new thread
+	var id enode.ID
+	rand.Read(id[:])
+
+	peer := NewPeer(version, p2p.NewPeer(id, name, nil), net)
+	errc := make(chan error, 1)
+	go func() {
+		errc <- backend.RunPeer(peer, func(peer *Peer) error {
+			return Handle(backend, peer)
+		})
+	}()
+	return &testPeer{app: app, net: net, Peer: peer}, errc
+}
+
+// close terminates the local side of the peer, notifying the remote protocol
+// manager of termination.
+func (p *testPeer) close() {
+	p.Peer.Close()
+	p.app.Close()
+}