加载中…智能合约开发遇到的坑
(2018-07-23 09:30:01)| 分类： 前端总结 |
网上搜索的资料写的很详细啊，可试验啊试验，始终不成功，
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)
})
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)
})
})
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);
};
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
//合约转账
最后附上大神的私链代码供参考：
router.post('/transfer/token/sign.json', function (req, res)
{
});
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