How can I decode Ed25519 addresses to the regular 56 letters format?

Question

I've been trying to use the stellar-archivist command 'dumpxdr' to unpack transactions files that are stored in the stellar core history

However the in the results asset codes and addresses appear in an unusual format:

"Asset": {
                                    "Type": 1,
                                    "AlphaNum4": {
                                        "AssetCode": [
                                            66,
                                            84,
                                            67,
                                            0
                                        ],
                                        "Issuer": {
                                            "Type": 0,
                                            "Ed25519": [
                                                63,
                                                240,
                                                248,
                                                202,
                                                234,
                                                182,
                                                83,
                                                235,
                                                9,
                                                242,
                                                59,
                                                84,
                                                254,
                                                175,
                                                46,
                                                84,
                                                240,
                                                194,
                                                151,
                                                210,
                                                16,
                                                45,
                                                49,
                                                56,
                                                1,
                                                35,
                                                9,
                                                153,
                                                40,
                                                229,
                                                92,
                                                245
                                            ]
                                        }
                                    },

I would like to see it as a regular stellar address (56 letters, starts with G)

Answer 1

• Start with 32 bytes
• Add a byte of 0x30 as prefix 'G' (now you have 33 bytes)
• Calculate the checksum (two bytes)
• Add the checksum as suffix (now you have 35 bytes)
• Convert them to base32
• That's your public key

Apply the same but using 'S' (byte 0x90) as prefix for secret keys

Answer 2

Found an answer using the stellar python library

from stellar_base import utils
x = bytearray(Ed25519 array here)  
account = utils.encode_check('account',x)

However I still have no idea what exactly is happening here, so I would appreciate any answer regardless :)