Lesson:-5 cannot estimate gas; transaction may fail or may require manual gas limit

[ankit-ml12]

My deploy,js code

const ethers = require('ethers');
const fs = require('fs-extra');
require("dotenv").config()

async function main(){

const` provider = new ethers.providers.JsonRpcProvider(process.env.RPC_URL);
const wallet =  new ethers.Wallet(process.env.PRIVATE_KEY, provider);
const abi = fs.readFileSync('./SimpleStorage_sol_SimpleStorage.abi', "utf-8");
const binary = fs.readFileSync('./SimpleStorage_sol_SimpleStorage.bin', "utf-8");
const ContractFactory = new ethers.ContractFactory(abi, binary, wallet);
console.log("deploying please wait ......");
const Contract =  await ContractFactory.deploy();
console.log(Contract);} 

main()
.then(()=>process.exit(0))
 .catch((error)=>{
    console.log(error);
    process.exit(1)}
);

and error look like this

<ref *1> Error: cannot estimate gas; transaction may fail or may require manual gas limit [ See: https://links.ethers.org/v5-errors-UNPREDICTABLE_GAS_LIMIT ] (error={"reason":"processing response error","code":"SERVER_ERROR","body":"{"id":52,"jsonrpc":"2.0","error":{"message":"ENOENT: no such file or directory, open 'C:\\Users\\patid\\AppData\\Roaming\\Ganache\\workspaces\\Quickstart\\chaindata\\_tmp\\tmp-1938020mSSxmP5N0s'","code":"ENOENT","data":{"stack":"Error: ENOENT: no such file or directory, open 'C:\\Users\\patid\\AppData\\Roaming\\Ganache\\workspaces\\Quickstart\\chaindata\\_tmp\\tmp-1938020mSSxmP5N0s'","name":"Error"}}}","error":{"code":"ENOENT","data":{"stack":"Error: ENOENT: no such file or directory, open 'C:\Users\patid\AppData\Roaming\Ganache\workspaces\Quickstart\chaindata\_tmp\tmp-1938020mSSxmP5N0s'","name":"Error"}},"requestBody":"{"method":"eth_estimateGas","params":[{"gasPrice":"0x4a817c800","from":"0xe90f376138a02a58199ff6b8b5bbe31143bc8f20","data":"
-----------------------------------------------------binary code----------------------------------------------
requestMethod="POST", url="http://127.0.0.1:7546", code=SERVER_ERROR, version=web/5.7.1)
at Logger.makeError (C:\Users\patid\OneDrive\Desktop\web 3\freecodecamp\node_modules@ethersproject\logger\lib\index.js:238:21)
at Logger.throwError (C:\Users\patid\OneDrive\Desktop\web 3\freecodecamp\node_modules@ethersproject\logger\lib\index.js:247:20)
at C:\Users\patid\OneDrive\Desktop\web 3\freecodecamp\node_modules@ethersproject\web\lib\index.js:313:32
at step (C:\Users\patid\OneDrive\Desktop\web 3\freecodecamp\node_modules@ethersproject\web\lib\index.js:33:23)
at Object.next (C:\Users\patid\OneDrive\Desktop\web 3\freecodecamp\node_modules@ethersproject\web\lib\index.js:14:53)
at fulfilled (C:\Users\patid\OneDrive\Desktop\web 3\freecodecamp\node_modules@ethersproject\web\lib\index.js:5:58)
at processTicksAndRejections (node:internal/process/task_queues:96:5) {
reason: 'processing response error',
code: 'SERVER_ERROR',
body: {"id":52,"jsonrpc":"2.0","error":{"message":"ENOENT: no such file or directory, open 'C:\\\\Users\\\\patid\\\\AppData\\\\Roaming\\\\Ganache\\\\workspaces\\\\Quickstart\\\\chaindata\\\\_tmp\\\\tmp-1938020mSSxmP5N0s'","code":"ENOENT","data":{"stack":"Error: ENOENT: no such file or directory, open 'C:\\\\Users\\\\patid\\\\AppData\\\\Roaming\\\\Ganache\\\\workspaces\\\\Quickstart\\\\chaindata\\\\_tmp\\\\tmp-1938020mSSxmP5N0s'","name":"Error"}}},
error: Error: ENOENT: no such file or directory, open 'C:\Users\patid\AppData\Roaming\Ganache\workspaces\Quickstart\chaindata_tmp\tmp-1938020mSSxmP5N0s'
at getResult (C:\Users\patid\OneDrive\Desktop\web 3\freecodecamp\node_modules@ethersproject\providers\lib\json-rpc-provider.js:191:21)
at processJsonFunc (C:\Users\patid\OneDrive\Desktop\web 3\freecodecamp\node_modules@ethersproject\web\lib\index.js:356:22)
at C:\Users\patid\OneDrive\Desktop\web 3\freecodecamp\node_modules@ethersproject\web\lib\index.js:288:46
at step (C:\Users\patid\OneDrive\Desktop\web 3\freecodecamp\node_modules@ethersproject\web\lib\index.js:33:23)
at Object.next (C:\Users\patid\OneDrive\Desktop\web 3\freecodecamp\node_modules@ethersproject\web\lib\index.js:14:53)
at fulfilled (C:\Users\patid\OneDrive\Desktop\web 3\freecodecamp\node_modules@ethersproject\web\lib\index.js:5:58)
at processTicksAndRejections (node:internal/process/task_queues:96:5) {
code: 'ENOENT',
data: [Object]
},

[krakxn]

This seems like an issue with the RPC_URL. Please reply w/ the .env file.

[ankit-ml12]

  PRIVATE_KEY = 4e87a2070a7463e1132b3081cbd592225a56b5712f34f7443ecf9307f8c25b2f
  RPC_URL= http://127.0.0.1:7546
  

[krakxn]

@ankit-ml12

That, precisely, is the issue.

Include no whitespaces before and after the =

E.g.

pvtKey=abcd

i.e. no space

[ankit-ml12]

thankyou @krakxn for you reply
my code start runing once i relaunch ganache.

[krakxn]

Good luck!

That still is a fault though, so fix it and in the future as well.

[ankit-ml12]

ok

[joeljosjoseph]

Try restarting ganache (exit the application) and ensure the RPC_URL is the exact same
Also make sure that the private key is from one of the accounts shown in ganache.

[ankit-ml12]

Thankyou @joeljosjoseph this work for me.
But wait
How you find this error ???

[joeljosjoseph]

I had a similar issue (not the same error) which got solved when I restarted ganache. Anyway, happy to help :)

[GitAniket98]

Hey @joeljosjoseph , I am still getting that error. Can you help me fix that? This solution didn't work for me.