veto: added more comments

1 files changed, 7 insertions, 2 deletions

diff --git a/veto/veto.go b/veto/veto.go
index f4faa38..e59ec43 100644
--- a/veto/veto.go
+++ b/veto/veto.go
@@ -284,14 +284,16 @@ func (coms coms) prod() (product *point) {
 }
 
 // For a given slice of commitments of length n, compute
-//
-//	g^y_i = Prod(g^x_j, 1, i-1)/Prod(g^x_j, i+1, n)
+// g^y_i = Prod(g^x_j, 1, i-1)/Prod(g^x_j, i+1, n)
 func (coms coms) computeGy(index int) *point {
 	gy1 := coms[:index].prod()
 	gy2 := coms[index+1:].prod().inv()
 	return gy1.mult(gy2)
 }
 
+// Round2 implements the round 2 of the AV-Net protocol, where a participant
+// has received all commitments from the other participants and calculates
+// g^(c*y), where c is either private.r (when veto is true) or private.x.
 func (v *Vote) Round2(participants []*Commitment) (gcy *point, e error) {
 	var c int
 	for _, p := range participants {
@@ -322,6 +324,9 @@ func (v *Vote) Round2(participants []*Commitment) (gcy *point, e error) {
 	return gy.scalarMult(v.private.x), nil
 }
 
+// IsVetoed is the final step in the AV-Net protocol, where each participant, has
+// received the g^(c_i*y_i) from all other participants and calculates the product
+// of them.  If the result is the unit element of the group, no veto was present.
 func (pts points) IsVetoed() bool {
 	product := pts.prod()
 	one := one()