[Bitcoin-development] On OP_RETURN in upcoming 0.9

[Mark Friedenbach]

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OP_RETURN outputs are provably unspendable *and* not included in the
UTXO set, so they're not dust (the client makes this check and handles
TX_NULL_DATA outputs separately).

On 02/24/2014 10:13 AM, Tamas Blummer wrote:
> It costs at least 5430 satoshis to create an output at the moment.
>  Is the same spam limit applied if the script is OP_RETURN? If not,
> I would be concerned od opening a cheap spam.
> 
> Tamas Blummer
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