| Schedule of share purchase warrants |
| | | Number of warrants | | | Weighted average exercise price | | | | | | | | | | | Balance, January 1, 2019 | | | 3,899,673 | | | $ | 0.20 | | | Issued | | | 775,000 | | | | 0.10 | | | Expired | | | (147,059 | ) | | | 0.35 | | | Balance, December 31, 2019 | | | 4,527,614 | | | | 0.18 | | | Issued | | | - | | | | - | | | Adjusted for triggered down-round provisions | | | 315,521,528 | | | | 0.00 | | | Exercised | | | (96,957,101 | ) | | | 0.00 | | | Expired | | | (56,574,123 | ) | | | 0.00 | | | Balance, December 31, 2020 | | | 166,517,918 | | | $ | 0.00 | |
| Schedule of share purchase warrants outstanding |
| Number of warrants outstanding | | | Exercise price | | | Expiration date | | | 2,222,222 | | | $ | 0.03 | | | December 2, 2024 | | | 163,265,304 | | | $ | 0.00 | | | September 23, 2024 | | | 980,392 | | | $ | 0.15 | | | December 2, 2021 | | | 50,000 | | | $ | 0.20 | | | January 2, 2022 | | | 166,517,918 | | | | | | | | |