利用 web3，调用 erc 20 token 合约，连接 infura 节点，进行转账

var Web3 = require("web3");
var Tx = require('ethereumjs-tx');

// 合约地址
var contractAddress = "0x86bd73cfac0205cbd95adb5cca6adbb876fdbe68";
// 创建web3对象
var web3 = new Web3();
// 连接到 ropsten 测试节点
web3.setProvider(new Web3.providers.HttpProvider("https://ropsten.infura.io/"))

// 通过ABI和地址获取已部署的合约对象
var fs = require('fs');
var jsonFile = "contract_abi.json"; // 读取合约 abi 文件
var parsed= JSON.parse(fs.readFileSync(jsonFile));
var abi = parsed.abi;
var coinContract = web3.eth.contract(abi).at(contractAddress);

var fromAddress = "0xe61ec6bbdedd0ab319cf311152fca5f487153481";
var toAddress = "0xed4048f4d627d52edb5f62c4496396a576c0433e";
var count = web3.eth.getTransactionCount(fromAddress);
var gasPrice = web3.eth.gasPrice;
var gasLimit = 90000;

// 查询余额
var tokenBalance = coinContract.balanceOf(fromAddress);
console.log(tokenBalance)

// 转账
var data = coinContract.transfer.getData(toAddress,
                1000000000000000000000,
                {from: fromAddress});
var rawTransaction = {
    "from": fromAddress,
    "nonce": web3.toHex(count),
    "gasPrice": web3.toHex(gasPrice),
    "gasLimit": web3.toHex(gasLimit),
    "to": contractAddress,
    "value": "0x0",
    "data": data,
};

// 读取私钥，这里不包含‘0x’两个字符
var privKey = new Buffer.from('c20b55c9c95916a86361a......', 'hex');
var tx = new Tx(rawTransaction);

// 用私钥签名交易信息
tx.sign(privKey);
var serializedTx = tx.serialize();

// 发送交易
web3.eth.sendRawTransaction('0x' + serializedTx.toString('hex'), 
    function(err, hash) {
        if (!err)
            console.log(hash);
        else
            console.log(err);
});

批量转账合约，参考这里的实现，部分源码如下：

pragma solidity ^0.4.21;

.....

contract FlyDropToken is Claimable {
    using SafeMath for uint256;

    ERC20 public erc20tk = ERC20(0x86bd73cfac0205cbd95adb5cca6adbb876fdbe68); // 修改成你的合约地址
    bytes[] internal approveRecords;

    event ReceiveApproval(address _from, uint256 _value, address _token, bytes _extraData);

    /**
     * @dev receive approval from an ERC20 token contract, take a record
     *
     * @param _from address The address which you want to send tokens from
     * @param _value uint256 the amounts of tokens to be sent
     * @param _token address the ERC20 token address
     * @param _extraData bytes the extra data for the record
     */
    function receiveApproval(address _from, uint256 _value, address _token, bytes _extraData) public {
        // erc20tk = ERC20(_token);
        require(erc20tk.transferFrom(_from, this, _value)); // transfer tokens to this contract
        approveRecords.push(_extraData);
        emit ReceiveApproval(_from, _value, _token, _extraData);
    }

    /**
     * @dev Send tokens to other multi addresses in one function
     *
     * @param _destAddrs address The addresses which you want to send tokens to
     * @param _values uint256 the amounts of tokens to be sent
     */
    function multiSend(address[] _destAddrs, uint256[] _values) onlyOwner public returns (uint256) {
        require(_destAddrs.length == _values.length);

        uint256 i = 0;
        for (; i < _destAddrs.length; i = i.add(1)) {
            if (!erc20tk.transfer(_destAddrs[i], _values[i])) {
                break;
            }
        }

        return (i);
    }

    function changERC20(address _token) onlyOwner public {
        erc20tk = ERC20(_token);
    }

    /**
     * @dev Send tokens to other multi addresses in one function
     *
     * @param _from address The address which you want to send tokens from
     * @param _destAddrs address The addresses which you want to send tokens to
     * @param _values uint256 the amounts of tokens to be sent
     */
    function multiSendFrom(address _from, address[] _destAddrs, uint256[] _values) onlyOwner public returns (uint256) {
        require(_destAddrs.length == _values.length);

        uint256 i = 0;
        for (; i < _destAddrs.length; i = i.add(1)) {
            if (!erc20tk.transferFrom(_from, _destAddrs[i], _values[i])) {
                break;
            }
        }

        return (i);
    }
}

....

调用 token 合约，授权批量合约转账

contractAddress = '0x35790593c3c92b99a8357a9a64749ca5841d6e51';
data = coinContract.approve.getData(contractAddress,10000000000000000000000,{from: fromAddress});

调用批量转账合约，进行转账

var fromAddress = "0xe61ec6bbdedd0ab319cf311152fca5f487153481"
var toAddressArr = ["0xed4048f4d627d52edb5f62c4496396a576c0433e","0xe97e126d37d79283c6c3377c28ee807dcb2f23f1"]
var amounts = [100000000000000000000, 1000000000000000000000]
var count = web3.eth.getTransactionCount(fromAddress);
var gasPrice = web3.eth.gasPrice;
var gasLimit = 90000;

var data = contract.multiSendFrom.getData(fromAddress,
                toAddressArr,
                amounts);
var rawTransaction = {
    "from": fromAddress,
    "nonce": web3.toHex(count),
    "gasPrice": web3.toHex(gasPrice),
    "gasLimit": web3.toHex(gasLimit),
    "to": contractAddress,
    "value": "0x0",
    "data": data,
};

var privKey = new Buffer.from('c20b55c9c95916a86361a.....', 'hex');
var tx = new Tx(rawTransaction);

tx.sign(privKey);
var serializedTx = tx.serialize();

web3.eth.sendRawTransaction('0x' + serializedTx.toString('hex'), function(err, hash) {
    if (!err)
        console.log(hash);
    else
        console.log(err);
});