refactor: Added explanations to the scripts

pem2pubhex.sh

@@ -1,3 +1,14 @@
 #!/bin/bash
 
-cat $1 | head -3 | tail -2 | base64 --decode | xxd -c 0 -ps | tail -c 129
+# Read content of file in the first argument and concatenate at terminal
+cat $1 | \
+# Retain only first 3 lines (i.e. remove "-----END PUBLIC KEY-----" line)
+head -3 | \
+# Retain only the last 2 lines (i.e. remove "-----BEGIN PUBLIC KEY----- line)
+tail -2 | \
+# Decode base64 to binary
+base64 --decode | \
+# Convert binary to hex as one line and print to terminal
+xxd -c 0 -ps | \
+# Retain only the last 129 characters (inclusive of EOL)
+tail -c 129

pubhex2evm.sh

@@ -1,3 +1,12 @@
 #!/bin/bash
 
-cat $1 | keccak-256sum -x -l | tr -d ' -' | tail -c 41 | xargs -I % echo 0x%
+# Read content of file in the first argument and concatenate at terminal
+cat $1 | \
+# Compute Keccak256 sum of hexed public key literal and express in lowercase hexadecimal
+keccak-256sum -x -l | \
+# Remove the trailing "[:space:][:hyphen:]" characters
+tr -d ' -' | \
+# Retain only the last 41 characters (inclusive of EOL)
+tail -c 41 | \
+# Prepend the address with "0x"
+xargs -I % echo 0x%