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I was going over a bill of exchange (vaihtokirja) in which two real estate properties were swapped between the parties.

The document talks about "väliraha", which was the main payment made in this particular transaction.

In this case, the "väliraha" was equal to the difference between the value of the two properties.
(In other words, if one place is worth EUR 1 million and the other is 750K, the "väliraha" would be 250K, payable to the person handing over the million-euro property.)

Is this what "väliraha" generally refers to (i.e. the difference between two or more sums), or does it have a more general meaning?

Thanks


(I've seen "cash payment" proposed as a translation of "väliraha", but I'm a bit doubtful: if "cash" means physical bills and coins, then it's unlikely that the sums I've seen referred to as "väliraha" were paid in this form.)