impl FromSlip132 for Xpub {
    fn from_slip132_str(s: &str) -> Result<Self, Error> {
        let mut data = base58::decode_check(s)?;

        let mut prefix = [0u8; 4];
        prefix.copy_from_slice(&data[0..4]);
        let slice = match prefix {
            VERSION_MAGIC_XPUB
            | VERSION_MAGIC_YPUB
            | VERSION_MAGIC_ZPUB
            | VERSION_MAGIC_YPUB_MULTISIG
            | VERSION_MAGIC_ZPUB_MULTISIG => VERSION_MAGIC_XPUB,

            VERSION_MAGIC_TPUB
            | VERSION_MAGIC_UPUB
            | VERSION_MAGIC_VPUB
            | VERSION_MAGIC_UPUB_MULTISIG
            | VERSION_MAGIC_VPUB_MULTISIG => VERSION_MAGIC_TPUB,

            _ => return Err(Error::UnknownSlip32Prefix),
        };
        data[0..4].copy_from_slice(&slice);

        let xpub = Xpub::decode(&data)?;

        Ok(xpub)
    }
}

impl FromSlip132 for Xpriv {
    fn from_slip132_str(s: &str) -> Result<Self, Error> {
        let mut data = base58::decode_check(s)?;

        let mut prefix = [0u8; 4];
        prefix.copy_from_slice(&data[0..4]);
        let slice = match prefix {
            VERSION_MAGIC_XPRV
            | VERSION_MAGIC_YPRV
            | VERSION_MAGIC_ZPRV
            | VERSION_MAGIC_YPRV_MULTISIG
            | VERSION_MAGIC_ZPRV_MULTISIG => VERSION_MAGIC_XPRV,

            VERSION_MAGIC_TPRV
            | VERSION_MAGIC_UPRV
            | VERSION_MAGIC_VPRV
            | VERSION_MAGIC_UPRV_MULTISIG
            | VERSION_MAGIC_VPRV_MULTISIG => VERSION_MAGIC_TPRV,

            _ => return Err(Error::UnknownSlip32Prefix),
        };
        data[0..4].copy_from_slice(&slice);

        let xprv = Xpriv::decode(&data)?;

        Ok(xprv)
    }
}