// GetTx takes a txid and returns the transaction. If we have it.
func (ts *TxStore) GetTx(txid *wire.ShaHash) (*wire.MsgTx, error) {
rtx := wire.NewMsgTx()
err := ts.StateDB.View(func(btx *bolt.Tx) error {
txns := btx.Bucket(BKTTxns)
if txns == nil {
return fmt.Errorf("no transactions in db")
}
txbytes := txns.Get(txid.Bytes())
if txbytes == nil {
return fmt.Errorf("tx %x not in db", txid.String())
}
buf := bytes.NewBuffer(txbytes)
return rtx.Deserialize(buf)
})
if err != nil {
return nil, err
}
return rtx, nil
}
func RightSha(in wire.ShaHash) wire.ShaHash {
return wire.DoubleSha256SH(append(in.Bytes(), 0x01)) // sha(sha(in, 1))
}
func LeftSha(in wire.ShaHash) wire.ShaHash {
return wire.DoubleSha256SH(in.Bytes()) // left is sha(sha(in))
}