Okla. Stat. tit. 16, § 16-24: Defense by warrantor - Recovery by warrantee

Where any grantor appears in any action to defend his warranty

or fails to appear after due notice, the court shall determine all

the rights of all the parties, and in case the recovery is adverse

to the warranty, the warrantee shall recover of the warrantor the

price of the land paid for the conveyance at the time of the

warranty, the value of all improvements lost, if any, and all sums

necessarily expended, including a reasonable attorney fee, and

interest at the rate of ten percent (10%) per annum on all sums so

paid from the time of payment.