// NewBlockFromReader returns a new instance of a bitcoin block given a
// Reader to deserialize the block. See Block.
func NewBlockFromReader(r io.Reader) (*Block, error) {
// Deserialize the bytes into a MsgBlock.
var msgBlock btcwire.MsgBlock
err := msgBlock.Deserialize(r)
if err != nil {
return nil, err
}
b := Block{
msgBlock: &msgBlock,
blockHeight: BlockHeightUnknown,
}
return &b, nil
}
// TxLoc returns the offsets and lengths of each transaction in a raw block.
// It is used to allow fast indexing into transactions within the raw byte
// stream.
func (b *Block) TxLoc() ([]btcwire.TxLoc, error) {
rawMsg, err := b.Bytes()
if err != nil {
return nil, err
}
rbuf := bytes.NewBuffer(rawMsg)
var mblock btcwire.MsgBlock
txLocs, err := mblock.DeserializeTxLoc(rbuf)
if err != nil {
return nil, err
}
return txLocs, err
}
