find a way to store possible trading pairs per exchange, as each crypto available at an exchange can probably only be traded against a select amount of other crypto's, not against all others that are available on the exchange.

[RikSchoonbeek]

Maybe by adding a new table which stores the tradable pairs:

• base
• quote
• exchange(s)

[RikSchoonbeek]

Finished first version of management command to add trade pair data still needs to be executed and tested

NOW: write a management command that will test if the pair data is added correctly

[RikSchoonbeek]

• [x] _utils.return_currency_instance_from_exchange_pk needs to also receive the exchange_instance
• [x] the ..get() inside it needs to also add this exchange_instance as parameter
• [x] the calling of this function needs to be updated in save_available_trading_pairs

[RikSchoonbeek]

I am now executing test_save_available_trading_pairs

And it seems to work, but I see an error in test_pairs_exchange_pks_mirror_pair_exchanges:

Setting the amount of trading pairs to be tested by this method to 100 I get the following result printed to the console:

Pair: Ethereum - Yen
- Pair.exchanges: ['Kraken']
- Exch_pk_exchanges: ['Kraken', 'Kraken']
Pair: Ethereum - US Dollar
- Pair.exchanges: ['Bittrex', 'Kraken']
- Exch_pk_exchanges: ['Bittrex', 'Kraken', 'Kraken']

For some reason Kraken's name is double.

Although it's not always the case:

Pair: Tezos (Pre-Launch) - Canadian Dollar
- Pair.exchanges: ['Kraken']
- Exch_pk_exchanges: ['Kraken']

• [ ] I need to look into this and solve it.

[RikSchoonbeek]

Decided to rewrite the management commands written untill now, this time do it test driven