x, y := c.Add(x1, y1, x2, y2)

	if x.Sign() == 0 && y.Sign() == 0 {
		return false
	}
	x.Mod(x, N)
	return x.Cmp(r) == 0
}

var one = new(big.Int).SetInt64(1)

// randFieldElement returns a random element of the order of the given
// curve using the procedure given in FIPS 186-4, Appendix B.5.2.
func randFieldElement(c elliptic.Curve, rand io.Reader) (k *big.Int, err error) {

	switch size {
	case 1:
		return uint64(b[0])
	case 2:
		return uint64(byteorder.LeUint16(b))
	case 4:
		return uint64(byteorder.LeUint32(b))
	case 8:
		return uint64(byteorder.LeUint64(b))
	default:
		panic("internal/poll: readInt with unsupported size")
	}

						return
					}
					atomic.AddInt32(&fullPushes, 1)
					time.Sleep(opts.debounceMax * 2)
					<-pushingCh
				} else {
					atomic.AddInt32(&partialPushes, 1)
				}
			}
			updateSent := uatomic.NewInt64(0)

			wg.Add(1)
			go func() {
				debounce(updateCh, stopCh, opts, fakePush, updateSent)
				wg.Done()
			}()

			expect := func(expectedPartial, expectedFull int32) {
				t.Helper()