It is very likely that applying an electric current to the LSA would destroy the indole nucleus at the 2 position, cause dimerization, and a number of other undesirable products.
Not sure what the shape of a circuit has to do with electrolysis
, I'd wager on nothing. Ethane gas being electrolyzed and somehow deposited into a container, good luck with that hehehe... The chemistry is really bad, alkylation reactions from gasseous products using electricity is not common place to say the least. Gas phase alkylations are done using high heat and pressure of very stable compounds(industrial conditions), however LSA is not stable. As far as turning ethane into an electrophile to alkylate the amide well, not going to happen.
Flipping the electrical current(DC) will not "flip" the amide, the amide is already flipping around in the solution due to VDW and kinetic molecular 'chaos'. It's not being adsorbed onto an electrode in this situation so switching polarity here is irrelevent. Honestly the design here is bad joke because of the way the metals especially very conductive metals like gold conduct. There is very little charge density on the in-side of these materials the charge will mostly be on the outer faces and in this case there is little reason for it to arc and jump into a container with LSA unless the electric field is strong enough to overcome the permittivity of a noble gas, usually this takes a really high potential(double digit kilovolts) from a big transformer...
As the others have said if you happen to stumble upon a golden sphere and some LSA, sell the golden sphere keep the LSA hehehe.