Calvin, Unilateral, and Bilateral
The content of Calvin’s theology not only gave a significant place to the covenant of grace in both its unilateral and bilateral aspects, but also contained, in his view of the Edenic arrangement between God and Adam, all the essential ingredients of what was later to be termed the covenant of nature, or the covenant of creation/works.
Andrew Woolsey, Unity and Continuity in Covenantal Thought: A Study in the Reformed Tradition to the Westminster Assembly (Grand Rapids, MI: Reformation Heritage Books, 2012), 552