curl --request GET \
  --url https://test.deribit.com/api/v2/public/get_currencies \
  --header 'Content-Type: application/json' \
  --data '
{
  "jsonrpc": "2.0",
  "id": 7538,
  "method": "public/get_currencies",
  "params": {}
}
'

{
  "jsonrpc": "2.0",
  "id": 7538,
  "result": [
    {
      "coin_type": "ETHER",
      "currency": "ETH",
      "currency_long": "Ethereum",
      "min_confirmations": 1,
      "min_withdrawal_fee": 0.0001,
      "withdrawal_fee": 0.0006,
      "withdrawal_priorities": [],
      "network_currency": "ETH",
      "network_fee": 0.0006,
      "decimals": 6
    },
    {
      "coin_type": "BITCOIN",
      "currency": "BTC",
      "currency_long": "Bitcoin",
      "min_confirmations": 1,
      "min_withdrawal_fee": 0.0001,
      "withdrawal_fee": 0.0001,
      "withdrawal_priorities": [
        {
          "value": 0.15,
          "name": "very_low"
        },
        {
          "value": 1.5,
          "name": "very_high"
        }
      ],
      "network_currency": "BTC",
      "network_fee": 0.0001,
      "decimals": 8
    }
  ]
}