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import base64

import uvicorn

from fastapi.staticfiles import StaticFiles

from fastapi import FastAPI

from fastapi.responses import FileResponse

app = FastAPI()

def add_base32_padding(encoded_text):

padding_needed = 8 - (len(encoded_text) % 8)

return encoded_text + '=' * padding_needed

def remove_f4_prefix(encoded_text):

prefix = "f410f"

if encoded_text.startswith(prefix):

return encoded_text[len(prefix):]

else:

return None

@app.get("/", response_class=FileResponse)

def read_root():

return "./static/index.html"

@app.get("/convert_address_f4_0X")

def convert_address_f4_0X(f4Address: str):

print(f4Address)

if f4Address is not None and len(f4Address) == 44:

encoded_text = remove_f4_prefix(f4Address)

encoded_text_with_padding = add_base32_padding(encoded_text.upper())

decoded_bytes = base64.b32decode(encoded_text_with_padding)

# Discard the last 4 bytes

decoded_bytes = decoded_bytes[:-4]

hex_string = "0x" + decoded_bytes.hex()

return {"fevm address": hex_string}

else:

return {"error": "Incorrect f4 address format"}

app.mount("/", StaticFiles(directory="static"), name="static")

if __name__ == "__main__":

uvicorn.run(app, host="0.0.0.0", port=8000)