Set the field information for a registrar.
The dispatch origin for this call must be Signed and the sender must be the account of the registrar whose index is index.
index
fields
Set the field information for a registrar.
The dispatch origin for this call must be Signed and the sender must be the account of the registrar whose index is
index.index: the index of the registrar whose fee is to be set.fields: the fields that the registrar concerns themselves with.