get https://api.hel.io/v1/currency/all
Returns a complete list of all supported currencies on Helio, including fiat and crypto. Use this to retrieve currency IDs for paylink creation.
NOTE: When using Helio on mainnet, set your Base URL to https://api.hel.io and generate your API keys from app.hel.io . For testnet, use https://api.dev.hel.io and generate your API keys from app.dev.hel.io.