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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)
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