Is it possible to have a multisignature transaction where N signatures are required and their inputs are limited in value, but not fixed?

The use case would be for a pooled acquisition, where the total amount to be spent is just roughly estimated, but not know. Every participant wants to just specify a maximum value to be used (probably the same for everybody).

The exceeding money, if any can go to a shared account or be returned to each of the "bakers".

  • Please give your question a more descriptive title that actually contains information about the content. – Murch May 30 '14 at 10:45

Restrictions on the btc value of a transaction cannot be enforced via a transaction script. The btc value is not a property accessible from a script.

I think it would be possible though to create a protocol on top of bitcoin which does have such properties.

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