In the context of English law, A Dictionary of Law offers the following legal concept of synallagmatic contract: (bilateral treaty, synallagmatic contract) Almost identically, the Louisiana Civil Code of 2008 provides in § 1908: A purchase contract is a classic example in which one party provides money and the other provides goods or services; or an employment contract in which the employer provides money as salary or wages and the employee provides certain services. A contract that creates mutual obligations, that is, both parties agree to do or refrain from doing something in exchange for the obligation of the other party. Most treaties are bilateral in nature. .