error: Invalid JSON RPC response: "" when trying to transfer testnet token
error: Invalid JSON RPC response: "" when trying to transfer testnet token
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0xMukesh · External communityPost link
External question — Ethereum Stack Exchange
Author: 0xMukesh
Original post: https://ethereum.stackexchange.com/questions/127031
License: CC BY-SA 4.0 — https://creativecommons.org/licenses/by-sa/4.0/
Adaptation: HTML converted to plain text; contact email addresses removed.
I am trying to transfer testnet tokens using Node.js, Web3.js, Ethers, and Alchemy but I am receiving
Invalid JSON RPC response: ""
whenever I deploy my code to
Railway
. Is this an issue of Railway or with my code? If with my code then what's the issue?
import { Request, Response } from 'express';
import { ethers } from 'ethers';
import dotenv from 'dotenv';
import Web3 from 'web3';
import constants from '../data/constants';
import {
chainId,
txUrl,
apiKeys,
httpsUrls,
amount,
ethersSupportedNetworkNames,
} from '../data/networks';
dotenv.config();
const privateKey = process.env.PRIVATE_KEY;
const wallet = new ethers.Wallet(privateKey as string);
const token = async (req: Request, res: Response) => {
const XHR = require('xhr2-cookies').XMLHttpRequest;
XHR.prototype._onHttpRequestError = function (
request: { abort: () => void },
error: any
) {
if (this._request !== request) {
return;
}
console.log(error, 'request');
this._setError();
request.abort();
this._setReadyState(XHR.DONE);
this._dispatchProgress('error');
this._dispatchProgress('loadend');
};
const address = wallet.address;
const networkApiKey = apiKeys.get(String(req.query.network));
const networkHttpsUrl = httpsUrls.get(String(req.query.network));
var web3 = new Web3(
new Web3.providers.HttpProvider(networkHttpsUrl as string)
);
const httpsProvider = new ethers.providers.AlchemyProvider(
ethersSupportedNetworkNames.get(req.query.network as string),
networkApiKey
);
let nonce = await httpsProvider.getTransactionCount(address, 'latest');
let feeData = await httpsProvider.getFeeData();
const balance = web3.utils.fromWei(
await web3.eth.getBalance(constants['fromAddress']),
'ether'
);
if (web3.utils.isAddress(String(req.query.address!)) === false) {
res.json({
error: 'Invalid receiver address',
invalidAddress: true,
});
} else {
if (balance < amount?.get(req.query.network as string)!) {
res.json({
error: 'Insufficient funds',
insufficientFunds: true,
});
} else {
const tx = {
type: 2,
nonce: nonce,
to: req.query.address,
maxPriorityFeePerGas: feeData['maxPriorityFeePerGas'],
maxFeePerGas: feeData['maxFeePerGas'],
value: ethers.utils.parseEther(
amount.get(req.query.network as string) as string
),
gasLimit: 30000,
chainId: chainId.get(String(req.query.network)),
};
const signedTx = await wallet.signTransaction(tx as any);
const txHash = ethers.utils.keccak256(signedTx);
console.log('Precomputed txHash:', txHash);
httpsProvider.sendTransaction(signedTx).then(console.log);
res.json({
txLink: `${txUrl.get(String(req.query.network))}/${txHash}`,
});
}
}
};
export default token;
I tried the solution by the Infura community
https://community.infura.io/t/invalid-json-rpc-response-error/1281
but still, it doesn't solve my issue.
Here is the entire error:
The code of other files which I have imported into the main file:
data/constants.ts
const constants = {
fromAddress: '0x894b6579524c61b56B3aB5624740464EaDF5237E',
};
export default constants;
data/networks.ts
import dotenv from 'dotenv';
dotenv.config();
const chainId = new Map([
['mumbai', 80001],
['rinkeby', 4],
]);
const txUrl = new Map([
['mumbai', 'https://mumbai.polygonscan.com/tx'],
['rinkeby', 'https://rinkeby.etherscan.io/tx'],
]);
const apiKeys = new Map([
['mumbai', process.env.ALCHEMY_API_KEY_MUMBAI],
['rinkeby', process.env.ALCHEMY_API_KEY_RINKEBY],
]);
const httpsUrls = new Map([
[
'mumbai',
'https://polygon-mumbai.g.alchemy.com/v2/' +
process.env.ALCHEMY_API_KEY_MUMBAI,
],
[
'rinkeby',
'https://eth-rinkeby.alchemyapi.io/v2/' +
process.env.ALCHEMY_API_KEY_RINKEBY,
],
]);
const ethersSupportedNetworkNames = new Map([
['mumbai', 'maticmum'],
['rinkeby', 'rinkeby'],
]);
const amount = new Map([
['mumbai', '1'],
['rinkeby', '0.1'],
]);
export {
chainId,
txUrl,
apiKeys,
httpsUrls,
amount,
ethersSupportedNetworkNames,
};
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aakash4dev · External communityPost link
External answer — Ethereum Stack Exchange
Author: aakash4dev
Original post: https://ethereum.stackexchange.com/a/127283
License: CC BY-SA 4.0 — https://creativecommons.org/licenses/by-sa/4.0/
Adaptation: HTML converted to plain text; contact email addresses removed.
put2 more await on your codes sir
const balance =
await
web3.utils.fromWei(
await web3.eth.getBalance(constants['fromAddress']),
'ether'
);
const txHash =
await
ethers.utils.keccak256(signedTx);
does it work now?
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