网上搜索的资料写的很详细啊，可试验啊试验，始终不成功，
使用Web3.js查询以太币和代币余额以及转账
https://www.jianshu.com/p/496c9d833df9
不用自己同步以太坊节点，直接发起签名交易
https://segmentfault.com/a/1190000014729677
以太坊ERC20 Token标准完整说明
https://blog.csdn.net/diandianxiyu_geek/article/details/78082551?utm_source=gold_browser_extension
最后发现，问题所在是因为网上的资料大部分都是针对私链的，而公链的转账是不一样的。。。啊。。。花费了两天的时间才试验出来
var myContract = new web3.eth.Contract(apiInterface, contractAddress);
// console.log(myContract.methods)
//合约查询账户余额
myContract.methods.balanceOf(currentAccount).call().then(data => {
console.log('from balance:' + data)
})
//合约转账
var txData = {
to: contractAddress,
value: web3.utils.toWei('0','ether'),//合约转账时，此值需设为0
gas: this.chainGas,
gasPrice: this.gasPrice,
nonce: nonce,
chainId: this.chainID,
data: myContract.methods.transfer(toAddress, 10000).encodeABI(),
}
web3.eth.accounts.signTransaction(txData, this.curAccount.decryptKey.privateKey)
.then((data)=>{
web3.eth.sendSignedTransaction(data.rawTransaction)
.on('transactionHash', (data)=>{
console.log('ok')
})
.catch((data)=>{
console.log(data)
})
})
最后附上大神的私链代码供参考：
router.post('/transfer/token/sign.json', function (req, res) {
const from = req.body.from;
const to = req.body.to;
const symbol = req.body.symbol;
const key = req.body.key;
var message = {};
try{
const abi = fs.readFileSync( __dirname + '/abi/'+symbol+'.abi', 'utf-8');
const contractAddress = contracts[symbol];
const contract = new web3.eth.Contract(JSON.parse(abi), contractAddress, { "from": from});
contract.methods.balanceOf(from).call().then(function(balance){
contract.methods.decimals().call().then(function(decimals){
const amount = new BigNumber(req.body.amount).toFixed(Number(decimals)).toString().replace(".","");
if(Number(amount) > Number(balance)){
message = {"status": false, "code":1, "data":{"error":"balance = " + balance}};
logger.error(message);
res.json(message);
return;
}
web3.eth.getGasPrice().then(function(gasPrice){
var price = Number(gasPrice);
web3.eth.getTransactionCount(from).then(function(nonce){
contract.methods.transfer(from, amount).estimateGas().then(function(gas){
var rawTransaction = {
"nonce": web3.utils.toHex(nonce),
"from": from,
"to": contractAddress,
"gas": web3.utils.toHex(gas),
"gasPrice": web3.utils.toHex(price),
// "gasLimit": this.web3.utils.toHex(gasLimit.gasLimit),
"value": "0x0",
"data": contract.methods.transfer(to, amount).encodeABI()
};
// console.log(`balance: ${balance}`);
// console.log(price);
// console.log(gas);
// console.log(amount);
// console.log(rawTransaction);
logger.debug(`/transfer/token/sign.json - gas: ${gas}, price: ${price}, cost: ${gas * price}, balance: ${balance}, amount: ${amount}, value: ${value}`);
// console.log(rawTransaction);
var privateKey = new Buffer.from(key, 'hex');
var tx = new Tx(rawTransaction);
tx.sign(privateKey);
var serializedTx = tx.serialize();
web3.eth.sendSignedTransaction('0x' + serializedTx.toString('hex')).on('receipt', function(txhash){
message = {"status":true, "code":0, "data":{"txhash":txhash}};
logger.info(message);
res.json(message);
});
});
});
});
});
});
}catch(error){
message = {"status": false, "code":1, "data":{"error":error.message}};
logger.error(message);
res.json(message);
};
});