fix: use Binary for checksum and merkle path so base64 deser works
#388
| Job | Run time |
|---|---|
| 42s | |
| 1m 48s | |
| 1m 47s | |
| 21s | |
| 6m 56s | |
| 15s | |
| 2m 12s | |
| 1m 19s | |
| 2m 31s | |
| 17m 51s |