coinex - fetchCurrencies, fetchDepositAddress, createDepositAddress

[pcriadoperez]

No description provided.

[kroitor]

@pcriadoperez we have this aspect of networks (also called chains), since each currency may exist on multiple blockchains, say, USDT can be sent over ERC20 (Ethererum) or TRC20 (Tron). How does this exchange behave when you fetch a deposit address for USDT? Does it support depositing USDT over multiple chains using the API? Is there any notion of chains aka networks in their fetchCurrencies response? We might be missing a fetchCurrencies implementation for this exchange. See huobi.js fetchCurrencies + fetchDepositAddress + fetchDepositAddressesByNetwork for reference. Note how we handle the currencies' networks in fetchCurrencies and the unified network param in withdraw/fetchDepositAddress.

[pcriadoperez]

Added fetchCurrencies
Updated Manual.md to include network structure