howudoin is used at run time in 4 crates (of which 4 optionally).

Depender (with downloads and own rev deps) howudoin version
140 4 zebra-state optional ^0.1.2
140 2 zebra-consensus optional ^0.1.2
130 2 zebra-network optional ^0.1.2
130 1 zebrad optional ^0.1.2