How to use the pywaves.MATCHER_PUBLICKEY function in PyWaves

asset2 = b'\0' if priceAsset.assetId=='' else b'\1' + base58.b58decode(priceAsset.assetId)
        sData = base58.b58decode(self.publicKey) + \
                base58.b58decode(pywaves.MATCHER_PUBLICKEY) + \
                asset1 + \
                asset2 + \
                orderType + \
                struct.pack(">Q", price) + \
                struct.pack(">Q", amount) + \
                struct.pack(">Q", timestamp) + \
                struct.pack(">Q", expiration) + \
                struct.pack(">Q", matcherFee)
        signature = crypto.sign(self.privateKey, sData)
        otype = "buy" if orderType==b'\0' else "sell"
        data = json.dumps({
            "senderPublicKey": self.publicKey,
            "matcherPublicKey": pywaves.MATCHER_PUBLICKEY,
            "assetPair": {
                "amountAsset": amountAsset.assetId,
                "priceAsset": priceAsset.assetId,
                },
            "orderType": otype,
            "price": price,
            "amount": amount,
            "timestamp": timestamp,
            "expiration": expiration,
            "matcherFee": matcherFee,
            "signature": signature
        })
        req = pywaves.wrapper('/matcher/orderbook', data, host=pywaves.MATCHER)
        print(req)
        id = -1
        if 'status' in req:

def __init__(self, orderId, assetPair, address = ''):
        self.orderId = orderId
        self.assetPair = assetPair
        self.address = address
        self.matcher = pywaves.MATCHER
        self.matcherPublicKey = pywaves.MATCHER_PUBLICKEY
        self.status()

def _postOrder(self, amountAsset, priceAsset, orderType, amount, price, maxLifetime=30*86400, matcherFee=pywaves.DEFAULT_MATCHER_FEE, timestamp=0):
        if timestamp == 0:
            timestamp = int(time.time() * 1000)
        expiration = timestamp + maxLifetime * 1000
        asset1 = b'\0' if amountAsset.assetId=='' else b'\1' + base58.b58decode(amountAsset.assetId)
        asset2 = b'\0' if priceAsset.assetId=='' else b'\1' + base58.b58decode(priceAsset.assetId)
        sData = base58.b58decode(self.publicKey) + \
                base58.b58decode(pywaves.MATCHER_PUBLICKEY) + \
                asset1 + \
                asset2 + \
                orderType + \
                struct.pack(">Q", price) + \
                struct.pack(">Q", amount) + \
                struct.pack(">Q", timestamp) + \
                struct.pack(">Q", expiration) + \
                struct.pack(">Q", matcherFee)
        signature = crypto.sign(self.privateKey, sData)
        otype = "buy" if orderType==b'\0' else "sell"
        data = json.dumps({
            "senderPublicKey": self.publicKey,
            "matcherPublicKey": pywaves.MATCHER_PUBLICKEY,
            "assetPair": {
                "amountAsset": amountAsset.assetId,
                "priceAsset": priceAsset.assetId,