Use the correct network seed derivation salt
%+ to-seed:bip39
seed:management
(trip (fall pass ''))
- =+ sed=(seed:ds 64^mad (a-co:co rev))
+ =+ sed=(seed:ds 64^mad (weld "network" (a-co:co rev)))
[rev sed (urbit:ds sed)]
::
++ ds :: derive from raw seed
