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Smart contract example: Crowdfunding contract pre-conditioned on variable UTXOs
UTXOs can be variables that must be conditionally enforced for the execution of a contract.
In this example, there is a conditional operation that executes a transfer of 100 USD from A to B conditioned on a set of variable UXTO transfers to A that each transfer [xi] USD with a policy that the sum of all [xi] must exceed 100 USD. This contract will require a signature from A on the operation.