2 Commits

Author	SHA1	Message	Date
therealyingtong	09b4da197d	base_field_elem.rs: Support fixed-base mul using base field element. ... In Orchard nullifier derivation, we multiply the fixed base K^Orchard by a value encoded as a base field element. This commit introduces an API that allows using a base field element as the "scalar" in fixed-base scalar multiplication. The API currently assumes that the base field element is output by another instruction (i.e. there is no instruction to directly witness it).	2021-07-07 23:10:59 +08:00
therealyingtong	ae25310385	chip::mul_fixed.rs: Implement fixed-base scalar mul instruction. ... Fixed-base scalar mul makes use of the add_incomplete and add instructions internally. The full-width and short signed share some common logic, which is captured in chip::mul_fixed.rs. The signed short variant introduces additional logic to handle the scalar's sign. This is done in the submodule mul_fixed::short.	2021-07-07 23:10:59 +08:00