blockchain.info select value

Challenge: Show data from https://blockchain.info/tobtc?currency=USD&value=500 where USD and value is a parameter
Twig-Code:
{% set js1 = '{"ARS":{"15m":95372256.32999999821186065673828125,"last":95372256.32999999821186065673828125,"buy":95372256.32999999821186065673828125,"sell":95372256.32999999821186065673828125,"symbol":"ARS"},"AUD":{"15m":95051.289999999993597157299518585205078125,"last":95051.289999999993597157299518585205078125,"buy":95051.289999999993597157299518585205078125,"sell":95051.289999999993597157299518585205078125,"symbol":"AUD"},"BRL":{"15m":348179.1799999999930150806903839111328125,"last":348179.1799999999930150806903839111328125,"buy":348179.1799999999930150806903839111328125,"sell":348179.1799999999930150806903839111328125,"symbol":"BRL"},"CAD":{"15m":92546.460000000006402842700481414794921875,"last":92546.460000000006402842700481414794921875,"buy":92546.460000000006402842700481414794921875,"sell":92546.460000000006402842700481414794921875,"symbol":"CAD"},"CHF":{"15m":52335.22000000000116415321826934814453125,"last":52335.22000000000116415321826934814453125,"buy":52335.22000000000116415321826934814453125,"sell":52335.22000000000116415321826934814453125,"symbol":"CHF"},"CLP":{"15m":58616933.179999999701976776123046875,"last":58616933.179999999701976776123046875,"buy":58616933.179999999701976776123046875,"sell":58616933.179999999701976776123046875,"symbol":"CLP"},"CNY":{"15m":464333.7000000000116415321826934814453125,"last":464333.7000000000116415321826934814453125,"buy":464333.7000000000116415321826934814453125,"sell":464333.7000000000116415321826934814453125,"symbol":"CNY"},"CZK":{"15m":1390820.83000000007450580596923828125,"last":1390820.83000000007450580596923828125,"buy":1390820.83000000007450580596923828125,"sell":1390820.83000000007450580596923828125,"symbol":"CZK"},"DKK":{"15m":428624.5499999999883584678173065185546875,"last":428624.5499999999883584678173065185546875,"buy":428624.5499999999883584678173065185546875,"sell":428624.5499999999883584678173065185546875,"symbol":"DKK"},"EUR":{"15m":57362.550000000002910383045673370361328125,"last":57362.550000000002910383045673370361328125,"buy":57362.550000000002910383045673370361328125,"sell":57362.550000000002910383045673370361328125,"symbol":"EUR"},"GBP":{"15m":50263.2099999999991268850862979888916015625,"last":50263.2099999999991268850862979888916015625,"buy":50263.2099999999991268850862979888916015625,"sell":50263.2099999999991268850862979888916015625,"symbol":"GBP"},"GHS":{"15m":711167.2299999999813735485076904296875,"last":711167.2299999999813735485076904296875,"buy":711167.2299999999813735485076904296875,"sell":711167.2299999999813735485076904296875,"symbol":"GHS"},"HKD":{"15m":529761.53000000002793967723846435546875,"last":529761.53000000002793967723846435546875,"buy":529761.53000000002793967723846435546875,"sell":529761.53000000002793967723846435546875,"symbol":"HKD"},"HRK":{"15m":312336.4199999999837018549442291259765625,"last":312336.4199999999837018549442291259765625,"buy":312336.4199999999837018549442291259765625,"sell":312336.4199999999837018549442291259765625,"symbol":"HRK"},"HUF":{"15m":21534864.3099999986588954925537109375,"last":21534864.3099999986588954925537109375,"buy":21534864.3099999986588954925537109375,"sell":21534864.3099999986588954925537109375,"symbol":"HUF"},"INR":{"15m":6158810.209999999962747097015380859375,"last":6158810.209999999962747097015380859375,"buy":6158810.209999999962747097015380859375,"sell":6158810.209999999962747097015380859375,"symbol":"INR"},"ISK":{"15m":8219657.00999999977648258209228515625,"last":8219657.00999999977648258209228515625,"buy":8219657.00999999977648258209228515625,"sell":8219657.00999999977648258209228515625,"symbol":"ISK"},"JPY":{"15m":10556788.320000000298023223876953125,"last":10556788.320000000298023223876953125,"buy":10556788.320000000298023223876953125,"sell":10556788.320000000298023223876953125,"symbol":"JPY"},"KRW":{"15m":97431294.48999999463558197021484375,"last":97431294.48999999463558197021484375,"buy":97431294.48999999463558197021484375,"sell":97431294.48999999463558197021484375,"symbol":"KRW"},"NGN":{"15m":91614741.60999999940395355224609375,"last":91614741.60999999940395355224609375,"buy":91614741.60999999940395355224609375,"sell":91614741.60999999940395355224609375,"symbol":"NGN"},"NZD":{"15m":113109.139999999999417923390865325927734375,"last":113109.139999999999417923390865325927734375,"buy":113109.139999999999417923390865325927734375,"sell":113109.139999999999417923390865325927734375,"symbol":"NZD"},"PLN":{"15m":242199.380000000004656612873077392578125,"last":242199.380000000004656612873077392578125,"buy":242199.380000000004656612873077392578125,"sell":242199.380000000004656612873077392578125,"symbol":"PLN"},"RON":{"15m":292268.7299999999813735485076904296875,"last":292268.7299999999813735485076904296875,"buy":292268.7299999999813735485076904296875,"sell":292268.7299999999813735485076904296875,"symbol":"RON"},"RUB":{"15m":5205267.290000000037252902984619140625,"last":5205267.290000000037252902984619140625,"buy":5205267.290000000037252902984619140625,"sell":5205267.29000000003725290298461914062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%} {% set shcDosc = (js1 | doshortcode) %} {% set shcArr = (shcDosc | json_decode(TRUE) ) %}
Value:

Result: {{nojsonvalue}}
In the above twig-code is “nameoftemplate=blockchaininfogetcurr”, in there is the URL https://blockchain.info/ticker and this twig
{{ _context | json_encode }}

In Action:

Value:

Result: 0.00738093