  We demonstrate that edge currents develop in active chiral matter -- composed
of spinning disk-shaped grains with chirally arranged tilted legs confined in a
circular vibrating chamber -- due to boundary shielding over a wide range of
densities corresponding to a gas, fluid, and crystal. The edge currents are
then shown to increasingly drive circulating bulk flows with area fraction
$\phi$ due to increasing spin-coupling between neighbors mediated by frictional
contacts, as percolating clusters develop. Edge currents are observed even in
the dilute limit. While, at low $\phi$, the average flux vanishes except within
a distance of a single particle diameter of the boundary, the penetration depth
grows with increasing $\phi$ till a solid body rotation is achieved
corresponding to the highest packing, where the particles are fully caged with
hexagonal order and spin in phase with the entire packing. A coarse-grained
model, based on the increased collisional interlocking of the particles with
$\phi$ and the emergence of order, captures the observed flow fields.
