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On 6 August 2014 08:17:02 GMT-07:00, Christian Decker <decker.christian@gmail.com> wrote:
>+1 for the new field, overloading fields with new meaning is definitely
>not
>a good idea.

To add a new field the best way to do it is create a new, parallel, tx format where fields are committed by merkle radix tree in an extensible and provable way. You'd then commit to that tree with a mandatory OP_RETURN output in the last txout, or with a new merkle root.

Changing the tx format itself in a hard-fork is needlessly disruptive, and in this case, wastes opportunities for improvement.
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