You are wrong.
A contract is a legally binding document between at least two parties that defines and governs the rights and duties of the parties to an agreement.Your contractual position only binds individual States to the Union on behalf of the citizens. The aftermath of the Civil War limited the ability of the State to buck the Union and of course this has been reaffirmed many times since then. You only wish contract law could be applied but there is no official forum to present your wishes. You tell it Congress, The USSC, or a any Federal Court and they won't buy it. Nobody would hear your case.
Bigly is correct..