Credit goes to @yushi2000 for providing the solve!
Observations
Analysing the code, we see that the i is repeated frequently without too many other characters in between.
Since we have something that looks like a splitter, lets analyse a bit more.
We have a to f and then i, counting the characters from a to i, we get 9.
This can fit in nicely with Morse were we can have . to .... and - to ---- and <space>
Use the index a = .
b = ..
c = ...
d = ....
e = -
f = --
g = ---
h = ----
i = <space>
....- -.-. .... -.-. ...-- .. -. ... .. -.. . ..- ..... --.. --... .-
Morse to text 4chc3insideu5z7a
Code #2
Observations
There are 25 letters in the code which can be sectioned into 5 rows of 5 characters:
esfxx
cepii
amass
pivur
steor
Reading up from the bottom-left, we can see the code:
space
times
evapf
ousix
rrsix
Combined, the passcode presents itself to us:
spacetimesevapfousixrrsix
spacetime7ap46rr6
Code #3
Observations
The code is already in the passcode format but project is not a valid keyword.