send-token-raw-tx.js

#!/usr/bin/env node

var rpc = require("ethrpc");

var tokenContractAddress = "0x..."; // address of ERC-20 token contract

var valueToSend = "0x42"; // value to send (in wei, i.e. 1e-18 ether)
var sender = "0x...";     // sending address
var receiver = "0x...";   // receiving address
var privateKey = Buffer.from("...", "hex"); // private key as bytearray (buffer)

rpc.connect({
  httpAddresses: [], // ethereum node HTTP endpoint
  wsAddresses: [],   // ethereum node websocket endpoint
  ipcAddresses: []   // ethereum node IPC endpoint
}, () => {
  rpc.packageAndSignRawTransaction({
    from: sender,
    to: tokenContractAddress,
    method: "transfer", 
    params: [receiver, valueToSend],
    signature: ["address", "uint256"]
  }, sender, privateKey, (signedRawTransaction) => {
    console.log("signed raw transaction:", signedRawTransaction);
    rpc.sendRawTransaction(signedRawTransaction, (rpcResponse) => {
      console.log("response from ethereum node:", rpcResponse);
    });
  });
});