refund-user.scala

@Callable(i)
func refundUser(id: Int) = {
	# receiving campaign parameters
	let endTimestamp = getIntegerValue(this, keyEndTimestamp(id))
	let targetSum = getIntegerValue(this, keyTargetSum(id))
	let raised = getIntegerValue(this, keyRaised(id))

	# receiving the number of tokens sent by the current investor
	let fundedAmount = getIntegerValue(this, keyUserFunded(id, i.callerPublicKey.toBase58String()))

	# making sure that the campaign end date has already passed
	if (endTimestamp > lastBlock.timestamp) then throw("This target time is not finished yet") else

	# making sure that the target campaign sum has NOT been collected
	if (raised > targetSum) then throw("This target raised enough tokens") else

	# making sure that the current investor supported the campaign
	if (fundedAmount == 0) then throw("You have no power here") else
    	[
        	# turning the total number of tokens from the current investor to zero
        	IntegerEntry(keyUserFunded(id, i.callerPublicKey.toBase58String()), 0)
        	# returning tokens to the investor
        	ScriptTransfer(i.caller, fundedAmount, thanksTokenId)
    	]
}