eth-scan-api/etherscan-api-master/lib/stats.js

API to etherscan with a simple interface

module.exports = function(getRequest, apiKey) {
  return {
    /**
     * Returns the supply of Tokens
     * @param {string} tokenname - Name of the Token
     * @param {string} contractaddress - Address from token contract
     * @example
     * var supply = api.stats.tokensupply(null, '0x57d90b64a1a57749b0f932f1a3395792e12e7055');
     * @returns {Promise.<object>}
     */
    tokensupply(tokenname, contractaddress) {
      const module = 'stats';
      const action = 'tokensupply';

      let params = {
        module, action, apiKey
      };

      if (tokenname) {
        params.tokenname = tokenname;
      }

      if (contractaddress) {
        params.contractaddress = contractaddress;
      }

      var query = new URLSearchParams(params).toString();
      return getRequest(query);
    },

    /**
     * Returns total supply of ether
     * var supply = api.stats.ethsupply();
     * @returns {Promise.<integer>}
     */
    ethsupply() {
      const module = 'stats';
      const action = 'ethsupply';
      const queryObject = {
        module, action, apiKey
      };
      var query = new URLSearchParams(queryObject).toString();
      return getRequest(query);
    },

    /**
     * Returns the price of ether now
     * @example
     * var price = api.stats.ethprice();
     * @returns {Promise.<integer>}
     */
    ethprice() {
      const module = 'stats';
      const action = 'ethprice';
      const queryObject = {
        module, action, apiKey
      };
      var query = new URLSearchParams(queryObject).toString();
      return getRequest(query);
    }
  };
};