async def METHOD_NAME(self, r):
    sm = self.sm
    sm.init_pairs()
    pairs = {
        "info": [],
        "warnings": [],
        "htlcFirst": True,
        "pairs": {
            "BTC/BTC": {
                "rate": 1,
                "limits": {
                    "maximal": sm._max_amount,
                    "minimal": sm._min_amount,
                    "maximalZeroConf": {
                        "baseAsset": 0,
                        "quoteAsset": 0
                    }
                },
                "fees": {
                    "percentage": 0.5,
                    "minerFees": {
                        "baseAsset": {
                            "normal": sm.normal_fee,
                            "reverse": {
                                "claim": sm.claim_fee,
                                "lockup": sm.lockup_fee
                            }
                        },
                        "quoteAsset": {
                            "normal": sm.normal_fee,
                            "reverse": {
                                "claim": sm.claim_fee,
                                "lockup": sm.lockup_fee
                            }
                        }
                    }
                }
            }
        }
    }
    return web.json_response(pairs)