Is the surety valid for all types of financial rights, including those potentially due in the future?

Primary text

The surety is valid for every financial right that is obligatory or that will ultimately become obligatory, such as the price of a sold item during the option period and afterwards, the rent, and the dower before or after consummation. This is because these rights are fixed obligations, and the possibility of their lapse does not prevent their guarantee, similar to the price of a sold item after the option period ends, even though the price might be dropped due to a defect or mutual agreement. Al-Shafi'i agrees with all these points.