truffle-hdwallet-provider-klaytn/src/subproviders/provider.js

HD Wallet-enabled Web3 provider for Klaytn

const inherits = require("util").inherits;
const Subprovider = require("./subprovider.js");

// wraps a provider in a subprovider interface

module.exports = ProviderSubprovider;

inherits(ProviderSubprovider, Subprovider);

function ProviderSubprovider(provider) {
  if (!provider) throw new Error("ProviderSubprovider - no provider specified");
  this.provider = provider;
}

ProviderSubprovider.prototype.handleRequest = function (payload, next, end) {
  this.provider.send(payload, function (err, response) {
    if (err) return end(err);
    // if (response.error) return end(new Error(response.error.message))
    end(null, response.result);
  });
};