The paper explores the possibility of generating the observed matter-antimatter asymmetry of the Universe through the evaporation of primordial black holes (PBHs) formed during an inflaton-dominated background. The authors investigate two scenarios: (1) PBH reheating, where PBH decay dominates the reheating process, and (2) inflaton reheating, where the inflaton decay is the primary source of reheating. They find that the allowed parameter space for producing the desired baryon asymmetry is heavily dependent on the shape of the inflaton potential, the energy density of PBHs, and the coupling between the inflaton and the Standard Model (SM). The paper also includes a gravitational leptogenesis setup through inflaton scattering via graviton exchange, which opens up a larger window for PBH mass. The authors conclude that such gravitational leptogenesis scenarios can be tested with upcoming gravitational wave detectors, particularly with blue-tilted primordial gravitational waves from inflation, providing a way to probe PBH-induced reheating and leptogenesis.The paper explores the possibility of generating the observed matter-antimatter asymmetry of the Universe through the evaporation of primordial black holes (PBHs) formed during an inflaton-dominated background. The authors investigate two scenarios: (1) PBH reheating, where PBH decay dominates the reheating process, and (2) inflaton reheating, where the inflaton decay is the primary source of reheating. They find that the allowed parameter space for producing the desired baryon asymmetry is heavily dependent on the shape of the inflaton potential, the energy density of PBHs, and the coupling between the inflaton and the Standard Model (SM). The paper also includes a gravitational leptogenesis setup through inflaton scattering via graviton exchange, which opens up a larger window for PBH mass. The authors conclude that such gravitational leptogenesis scenarios can be tested with upcoming gravitational wave detectors, particularly with blue-tilted primordial gravitational waves from inflation, providing a way to probe PBH-induced reheating and leptogenesis.