Now, it is settled that a valid contract may be discharged in any of the four ways namely: (a) by performance; or (b) by express agreement; or (c) by breach; or (d) by the doctrine of frustration. See Adedeji Vs Obajimi  LPELR-33712(SC); Tsokwa Oil Marketing Company Vs B.O.N. Ltd  11 NWLR (Pt 777) 163.
— S.O. Adeniyi, J. Nwabueze v. ABU Zaria (2023) – NICN/KD/34/2021