Reverse swap

[aurelvb]

"Anybody can swap a child token he holds for the same amount of its parent token."
Why that ?

Once a carbon credit is retired, ti cannot be activated again. An M+ should not be able to go back to M-.

[vporton]

First M- is not the parent of M+. So, yes, it cannot be "activated again".

This feature is useful for two reasons:

• Netherlands non-retired carbon tokens would be child of European non-retired carbon tokens. If we don't allow to swap European tokens back to Netherlands tokens, it would somehow devalue the European tokens (they have less usages and therefore are cheaper), thus creating an economical incentive for greater emissions. (This is explained in the README.md file.)

• My system could be used not only for accounting carbon but for other public goods, too. For example a token for free Web servers would be a child a token for free software. It is useful if anyone having been rewarded for a free Web server would be able to purchase something for the token of free software, as it is a special case of the free software. For carbon accounting, it is indirectly useful as increases adoption of our system for different usages, so adverting it, what benefits all our subprojects including the carbon subproject.