fix: use Binary for checksum and merkle path so base64 deser works
#385
| Job | Run time |
|---|---|
| 7m 11s | |
| 36s | |
| 30s | |
| 1m 54s | |
| 1m 47s | |
| 16s | |
| 2m 18s | |
| 1m 25s | |
| 2m 23s | |
| 18m 20s |