Feature/structuring examples

[ghost]

Notes

• The examples are run using the env.prod file instead of env.dev:

  ping: api.beta.kraken.com: Name or service not known
  

Changes

• .env.* files are used
• XBTCZUSD is replaced with XBTUSD since XBTCZUSD is throwing EQuery:Unknown asset pair errors
• XBTCEUR is replaced with XBTEUR according to the available currency pairs

Possible bugs?

• XBTCEUR is accepted by the API despite not being available
• examples/06_add_order/03_XBTUSD_buy_limit.php throws an error: EGeneral:Invalid arguments:/close-ordertype

[sabir-omis]

Hi Please help me some time i see this error:
[23-Sep-2021 12:32:58 America/Chicago] PHP Fatal error: Uncaught Payward\KrakenAPIException: JSON decode error in /home/.../kraken.php:107
Stack trace:
#0 /home/.../config.php(164): Payward\KrakenAPI->QueryPublic('Ticker', Array)
#1 /home/.../cronjob.php(7): GET_BTC_PRICE(Object(Payward\KrakenAPI))
#2 {main}
thrown in /home/.../kraken.php on line 107
[23-Sep-2021 13:15:45 America/Chicago] PHP Fatal error: Uncaught Payward\KrakenAPIException: CURL error: in /home/.../kraken.php:102
Stack trace:
#0 /home/.../config.php(164): Payward\KrakenAPI->QueryPublic('Ticker', Array)
#1 /home/.../cronjob.php(7): GET_BTC_PRICE(Object(Payward\KrakenAPI))
#2 {main}
thrown in /home/.../kraken.php on line 102