| 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) | |