Method load_leverage_brackets

python/ccxt/async_support/aster.py:3663–3706

(self, reload=False, params={})

        return self.filter_by_array_positions(result, 'symbol', symbols, False)

    async def load_leverage_brackets(self, reload=False, params={}):
        await self.load_markets_and_sign_in()
        # by default cache the leverage bracket
        # it contains useful stuff like the maintenance margin and initial margin for positions
        leverageBrackets = self.safe_dict(self.options, 'leverageBrackets')
        if (leverageBrackets is None) or (reload):
            response = await self.fapiPrivateGetV3LeverageBracket(params)
            #
            #    [
            #        {
            #            "symbol": "TRUTHUSDT",
            #            "brackets": [
            #                {
            #                    "bracket": "1",
            #                    "initialLeverage": "50",
            #                    "notionalCap": "5000",
            #                    "notionalFloor": "0",
            #                    "maintMarginRatio": "0.01",
            #                    "cum": "0.0"
            #                },
            #                {
            #                    "bracket": "2",
            #                    "initialLeverage": "20",
            #                    "notionalCap": "10000",
            #                    "notionalFloor": "5000",
            #                    "maintMarginRatio": "0.025",
            #                    "cum": "75.0"
            #                },
            #                ...
            #
            self.options['leverageBrackets'] = self.create_safe_dictionary()
            for i in range(0, len(response)):
                entry = response[i]
                marketId = self.safe_string(entry, 'symbol')
                symbol = self.safe_symbol(marketId, None, None, 'contract')
                brackets = self.safe_list(entry, 'brackets', [])
                result = []
                for j in range(0, len(brackets)):
                    bracket = brackets[j]
                    floorValue = self.safe_string(bracket, 'notionalFloor')
                    maintenanceMarginPercentage = self.safe_string(bracket, 'maintMarginRatio')
                    result.append([floorValue, maintenanceMarginPercentage])
                self.options['leverageBrackets'][symbol] = result
        return self.options['leverageBrackets']

    def keccak_message(self, message):
        return '0x' + self.hash(message, 'keccak', 'hex')