// TestInvWire tests the MsgInv wire encode and decode for various numbers
// of inventory vectors and protocol versions.
func TestInvWire(t *testing.T) {
// Block 203707 hash.
hashStr := "3264bc2ac36a60840790ba1d475d01367e7c723da941069e9dc"
blockHash, err := chainhash.NewHashFromStr(hashStr)
if err != nil {
t.Errorf("NewShaHashFromStr: %v", err)
}
// Transation 1 of Block 203707 hash.
hashStr = "d28a3dc7392bf00a9855ee93dd9a81eff82a2c4fe57fbd42cfe71b487accfaf0"
txHash, err := chainhash.NewHashFromStr(hashStr)
if err != nil {
t.Errorf("NewShaHashFromStr: %v", err)
}
iv := wire.NewInvVect(wire.InvTypeBlock, blockHash)
iv2 := wire.NewInvVect(wire.InvTypeTx, txHash)
// Empty inv message.
NoInv := wire.NewMsgInv()
NoInvEncoded := []byte{
0x00, // Varint for number of inventory vectors
}
// Inv message with multiple inventory vectors.
MultiInv := wire.NewMsgInv()
MultiInv.AddInvVect(iv)
MultiInv.AddInvVect(iv2)
MultiInvEncoded := []byte{
0x02, // Varint for number of inv vectors
0x02, 0x00, 0x00, 0x00, // InvTypeBlock
0xdc, 0xe9, 0x69, 0x10, 0x94, 0xda, 0x23, 0xc7,
0xe7, 0x67, 0x13, 0xd0, 0x75, 0xd4, 0xa1, 0x0b,
0x79, 0x40, 0x08, 0xa6, 0x36, 0xac, 0xc2, 0x4b,
0x26, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // Block 203707 hash
0x01, 0x00, 0x00, 0x00, // InvTypeTx
0xf0, 0xfa, 0xcc, 0x7a, 0x48, 0x1b, 0xe7, 0xcf,
0x42, 0xbd, 0x7f, 0xe5, 0x4f, 0x2c, 0x2a, 0xf8,
0xef, 0x81, 0x9a, 0xdd, 0x93, 0xee, 0x55, 0x98,
0x0a, 0xf0, 0x2b, 0x39, 0xc7, 0x3d, 0x8a, 0xd2, // Tx 1 of block 203707 hash
}
tests := []struct {
in *wire.MsgInv // Message to encode
out *wire.MsgInv // Expected decoded message
buf []byte // Wire encoding
pver uint32 // Protocol version for wire encoding
}{
// Latest protocol version with no inv vectors.
{
NoInv,
NoInv,
NoInvEncoded,
wire.ProtocolVersion,
},
// Latest protocol version with multiple inv vectors.
{
MultiInv,
MultiInv,
MultiInvEncoded,
wire.ProtocolVersion,
},
}
t.Logf("Running %d tests", len(tests))
for i, test := range tests {
// Encode the message to wire format.
var buf bytes.Buffer
err := test.in.BtcEncode(&buf, test.pver)
if err != nil {
t.Errorf("BtcEncode #%d error %v", i, err)
continue
}
if !bytes.Equal(buf.Bytes(), test.buf) {
t.Errorf("BtcEncode #%d\n got: %s want: %s", i,
spew.Sdump(buf.Bytes()), spew.Sdump(test.buf))
continue
}
// Decode the message from wire format.
var msg wire.MsgInv
rbuf := bytes.NewReader(test.buf)
err = msg.BtcDecode(rbuf, test.pver)
if err != nil {
t.Errorf("BtcDecode #%d error %v", i, err)
continue
}
if !reflect.DeepEqual(&msg, test.out) {
t.Errorf("BtcDecode #%d\n got: %s want: %s", i,
spew.Sdump(msg), spew.Sdump(test.out))
continue
}
}
}
// TestInvWireErrors performs negative tests against wire encode and decode
// of MsgInv to confirm error paths work correctly.
func TestInvWireErrors(t *testing.T) {
pver := wire.ProtocolVersion
wireErr := &wire.MessageError{}
// Block 203707 hash.
hashStr := "3264bc2ac36a60840790ba1d475d01367e7c723da941069e9dc"
blockHash, err := chainhash.NewHashFromStr(hashStr)
if err != nil {
t.Errorf("NewShaHashFromStr: %v", err)
}
iv := wire.NewInvVect(wire.InvTypeBlock, blockHash)
// Base inv message used to induce errors.
baseInv := wire.NewMsgInv()
baseInv.AddInvVect(iv)
baseInvEncoded := []byte{
0x02, // Varint for number of inv vectors
0x02, 0x00, 0x00, 0x00, // InvTypeBlock
0xdc, 0xe9, 0x69, 0x10, 0x94, 0xda, 0x23, 0xc7,
0xe7, 0x67, 0x13, 0xd0, 0x75, 0xd4, 0xa1, 0x0b,
0x79, 0x40, 0x08, 0xa6, 0x36, 0xac, 0xc2, 0x4b,
0x26, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // Block 203707 hash
}
// Inv message that forces an error by having more than the max allowed
// inv vectors.
maxInv := wire.NewMsgInv()
for i := 0; i < wire.MaxInvPerMsg; i++ {
maxInv.AddInvVect(iv)
}
maxInv.InvList = append(maxInv.InvList, iv)
maxInvEncoded := []byte{
0xfd, 0x51, 0xc3, // Varint for number of inv vectors (50001)
}
tests := []struct {
in *wire.MsgInv // Value to encode
buf []byte // Wire encoding
pver uint32 // Protocol version for wire encoding
max int // Max size of fixed buffer to induce errors
writeErr error // Expected write error
readErr error // Expected read error
}{
// Latest protocol version with intentional read/write errors.
// Force error in inventory vector count
{baseInv, baseInvEncoded, pver, 0, io.ErrShortWrite, io.EOF},
// Force error in inventory list.
{baseInv, baseInvEncoded, pver, 1, io.ErrShortWrite, io.EOF},
// Force error with greater than max inventory vectors.
{maxInv, maxInvEncoded, pver, 3, wireErr, wireErr},
}
t.Logf("Running %d tests", len(tests))
for i, test := range tests {
// Encode to wire format.
w := newFixedWriter(test.max)
err := test.in.BtcEncode(w, test.pver)
if reflect.TypeOf(err) != reflect.TypeOf(test.writeErr) {
t.Errorf("BtcEncode #%d wrong error got: %v, want: %v",
i, err, test.writeErr)
continue
}
// For errors which are not of type wire.MessageError, check
// them for equality.
if _, ok := err.(*wire.MessageError); !ok {
if err != test.writeErr {
t.Errorf("BtcEncode #%d wrong error got: %v, "+
"want: %v", i, err, test.writeErr)
continue
}
}
// Decode from wire format.
var msg wire.MsgInv
r := newFixedReader(test.max, test.buf)
err = msg.BtcDecode(r, test.pver)
if reflect.TypeOf(err) != reflect.TypeOf(test.readErr) {
t.Errorf("BtcDecode #%d wrong error got: %v, want: %v",
i, err, test.readErr)
continue
}
// For errors which are not of type wire.MessageError, check
// them for equality.
if _, ok := err.(*wire.MessageError); !ok {
if err != test.readErr {
t.Errorf("BtcDecode #%d wrong error got: %v, "+
"want: %v", i, err, test.readErr)
continue
}
}
}
}