Example #1
0
// FetchBlockHeaderBySha - return a btcwire ShaHash
func (db *LevelDb) FetchBlockHeaderBySha(sha *btcwire.ShaHash) (bh *btcwire.BlockHeader, err error) {
	db.dbLock.Lock()
	defer db.dbLock.Unlock()

	// Read the raw block from the database.
	buf, _, err := db.fetchSha(sha)
	if err != nil {
		return nil, err
	}

	// Only deserialize the header portion and ensure the transaction count
	// is zero since this is a standalone header.
	var blockHeader btcwire.BlockHeader
	err = blockHeader.Deserialize(bytes.NewReader(buf))
	if err != nil {
		return nil, err
	}
	bh = &blockHeader

	return bh, err
}
Example #2
0
// TestBlockHeaderSerialize tests BlockHeader serialize and deserialize.
func TestBlockHeaderSerialize(t *testing.T) {
	nonce := uint32(123123) // 0x1e0f3

	// baseBlockHdr is used in the various tests as a baseline BlockHeader.
	hash := btcwire.GenesisHash
	merkleHash := btcwire.GenesisMerkleRoot
	bits := uint32(0x1d00ffff)
	baseBlockHdr := &btcwire.BlockHeader{
		Version:    1,
		PrevBlock:  hash,
		MerkleRoot: merkleHash,
		Timestamp:  time.Unix(0x495fab29, 0), // 2009-01-03 12:15:05 -0600 CST
		Bits:       bits,
		Nonce:      nonce,
	}

	// baseBlockHdrEncoded is the wire encoded bytes of baseBlockHdr.
	baseBlockHdrEncoded := []byte{
		0x01, 0x00, 0x00, 0x00, // Version 1
		0x6f, 0xe2, 0x8c, 0x0a, 0xb6, 0xf1, 0xb3, 0x72,
		0xc1, 0xa6, 0xa2, 0x46, 0xae, 0x63, 0xf7, 0x4f,
		0x93, 0x1e, 0x83, 0x65, 0xe1, 0x5a, 0x08, 0x9c,
		0x68, 0xd6, 0x19, 0x00, 0x00, 0x00, 0x00, 0x00, // PrevBlock
		0x3b, 0xa3, 0xed, 0xfd, 0x7a, 0x7b, 0x12, 0xb2,
		0x7a, 0xc7, 0x2c, 0x3e, 0x67, 0x76, 0x8f, 0x61,
		0x7f, 0xc8, 0x1b, 0xc3, 0x88, 0x8a, 0x51, 0x32,
		0x3a, 0x9f, 0xb8, 0xaa, 0x4b, 0x1e, 0x5e, 0x4a, // MerkleRoot
		0x29, 0xab, 0x5f, 0x49, // Timestamp
		0xff, 0xff, 0x00, 0x1d, // Bits
		0xf3, 0xe0, 0x01, 0x00, // Nonce
	}

	tests := []struct {
		in  *btcwire.BlockHeader // Data to encode
		out *btcwire.BlockHeader // Expected decoded data
		buf []byte               // Serialized data
	}{
		{
			baseBlockHdr,
			baseBlockHdr,
			baseBlockHdrEncoded,
		},
	}

	t.Logf("Running %d tests", len(tests))
	for i, test := range tests {
		// Serialize the block header.
		var buf bytes.Buffer
		err := test.in.Serialize(&buf)
		if err != nil {
			t.Errorf("Serialize #%d error %v", i, err)
			continue
		}
		if !bytes.Equal(buf.Bytes(), test.buf) {
			t.Errorf("Serialize #%d\n got: %s want: %s", i,
				spew.Sdump(buf.Bytes()), spew.Sdump(test.buf))
			continue
		}

		// Deserialize the block header.
		var bh btcwire.BlockHeader
		rbuf := bytes.NewBuffer(test.buf)
		err = bh.Deserialize(rbuf)
		if err != nil {
			t.Errorf("Deserialize #%d error %v", i, err)
			continue
		}
		if !reflect.DeepEqual(&bh, test.out) {
			t.Errorf("Deserialize #%d\n got: %s want: %s", i,
				spew.Sdump(&bh), spew.Sdump(test.out))
			continue
		}
	}
}