func addTxOuts(msgtx *wire.MsgTx, b balance, hash []byte, blockHeight uint32) error {
anchorHash, err := prependBlockHeight(blockHeight, hash)
if err != nil {
anchorLog.Errorf("ScriptBuilder error: %v\n", err)
}
builder := txscript.NewScriptBuilder()
builder.AddOp(txscript.OP_RETURN)
builder.AddData(anchorHash)
// latest routine from Conformal btcsuite returns 2 parameters, not 1... not sure what to do for people with the old conformal libraries :(
opReturn, err := builder.Script()
msgtx.AddTxOut(wire.NewTxOut(0, opReturn))
if err != nil {
anchorLog.Errorf("ScriptBuilder error: %v\n", err)
}
amount, _ := btcutil.NewAmount(b.unspentResult.Amount)
change := amount - fee
// Check if there are leftover unspent outputs, and return coins back to
// a new address we own.
if change > 0 {
// Spend change.
pkScript, err := txscript.PayToAddrScript(b.address)
if err != nil {
return fmt.Errorf("cannot create txout script: %s", err)
}
msgtx.AddTxOut(wire.NewTxOut(int64(change), pkScript))
}
return nil
}
