# Copyright (c) 2026 Emanuele Bellocchia
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# THE SOFTWARE.
"""Module for Harmony One address encoding/decoding."""
# Imports
from typing import Any, Union
from typing_extensions import override
from bip_utils.addr.eth_addr import EthAddrDecoder, EthAddrEncoder
from bip_utils.addr.iaddr_decoder import IAddrDecoder
from bip_utils.addr.iaddr_encoder import IAddrEncoder
from bip_utils.bech32 import Bech32ChecksumError, Bech32Decoder, Bech32Encoder
from bip_utils.coin_conf import CoinsConf
from bip_utils.ecc import IPublicKey
from bip_utils.utils.misc import BytesUtils
class OneAddrDecoder(IAddrDecoder):
"""
Harmony One address decoder class.
It allows the Harmony One address decoding.
"""
@staticmethod
def DecodeAddr(addr: str,
**kwargs: Any) -> bytes:
"""
Decode a Harmony One address to bytes.
Args:
addr (str): Address string
**kwargs : Not used
Returns:
bytes: Public key hash bytes
Raises:
ValueError: If the address encoding is not valid
"""
try:
addr_dec_bytes = Bech32Decoder.Decode(CoinsConf.HarmonyOne.ParamByKey("addr_hrp"),
addr)
except Bech32ChecksumError as ex:
raise ValueError("Invalid bech32 checksum") from ex
return EthAddrDecoder.DecodeAddr(
CoinsConf.Ethereum.ParamByKey("addr_prefix") + BytesUtils.ToHexString(addr_dec_bytes),
skip_chksum_enc=True
)
class OneAddrEncoder(IAddrEncoder):
"""
Harmony One address encoder class.
It allows the Harmony One address encoding.
"""
@override
@staticmethod
def EncodeKey(pub_key: Union[bytes, IPublicKey],
**kwargs: Any) -> str:
"""
Encode a public key to Harmony One address.
Args:
pub_key (bytes or IPublicKey): Public key bytes or object
**kwargs: Not used
Returns:
str: Address string
Raises:
ValueError: If the public key is not valid
TypeError: If the public key is not secp256k1
"""
# Get address in Ethereum format (remove "0x" at the beginning)
eth_addr = EthAddrEncoder.EncodeKey(pub_key)[2:]
# Encode in Bech32 format
return Bech32Encoder.Encode(CoinsConf.HarmonyOne.ParamByKey("addr_hrp"),
BytesUtils.FromHexString(eth_addr))
# Deprecated: only for compatibility, Encoder class shall be used instead
OneAddr = OneAddrEncoder