Uncaught (in promise) Error: No ethereum object

at checkIfTransactionsExists (:3000/src/context/TransactionContext.jsx:98:13)

I don't Know why it is happening

Here I've implemented window.location.reload() in the connectWallet() and sendTransaction() function, to refresh the page automatically, whenever the wallet is connected or the transaction is completed.

I was following the tutorial but I found the following error:

ReferenceError: Cannot access 'transactionContract' before initialization at getEthereumContract (TransactionContext.jsx:13:89)

Can anyone help me?

Hey man great tutorial as always, I was just wondering how would you store your private key in a more safe way, because right now everyone can see it 😅 do you think an env file would be a good idea?

I'm facing a problem with displaying the addressFrom data I cant figure out what I'm doing wrong. Everything is working as it should but I cant get the addressFrom: transaction.sender, value out for some reason.. This is how my function looks like,

and this is what I'm getting

as u can see it says that the addressFrom is undefined.

need help

Here is function sendTransaction : ` const sendTransaction = async () => { try { if(!ethereum) return alert("Please install metamask!")

        const { addressTo, amount, keyword, message } = formData
        const transactionsContract = getEthereumContract()
        const parsedAmount = ethers.utils.parseEther(amount)

        console.log(currentAccount)
        console.log("IN")
        await ethereum.request({
            method: "eth_sendTransaction",
            params: [{
              from: currentAccount,
              to: addressTo,
              gas: "0x7530",
              value: parsedAmount._hex,
            }],
          });
        console.log("OUT")
        const transactionHash = await transactionsContract.addToBlockchain(addressTo, parsedAmount, message, keyword)

        setIsLoading(true)
        console.log(`Loading - ${transactionHash.hash}`)
        await transactionHash.wait()
        console.log(`Success - ${transactionHash.hash}`)
        setIsLoading(false)

        const transactionsCount = await transactionsContract.getTransactionCount()

        setTransactionCount(transactionsCount.toNumber())

    } catch (error) {
        console.log(error)

        // throw new Error("No ethereum object.")
    }
}`

And I got error : MetaMask - RPC Error: Invalid transaction params: must specify "data" for contract deployments, or "to" (and optionally "data") for all other types of transactions. {code: -32602, message: 'Invalid transaction params: must specify "data" fo…ally "data") for all other types of transactions.'}

I deployed the script but i didn't get the address ... I checked my codes but it didn't work for me . Any suggest ?

i used " npx hardhat run scripts/deploy.js --network ropsten " Compilation finished successfully but transaction address didn't write the console

this is the error i am having and i dont exactly know how to fix but when i added the gist for tailwind con fig i get Cannot find module '@tailwindcss/forms' and here is full error

[plugin:vite:css] Cannot find module '@tailwindcss/forms' Require stack:

• C:\Users\tilab\Desktop\web3.0\client\tailwind.config.js
• C:\Users\tilab\Desktop\web3.0\client\node_modules\tailwindcss\lib\lib\setupTrackingContext.js
• C:\Users\tilab\Desktop\web3.0\client\node_modules\tailwindcss\lib\index.js
• C:\Users\tilab\Desktop\web3.0\client\node_modules\vite\dist\node\chunks\dep-4b9dfa16.js
• C:\Users\tilab\Desktop\web3.0\client\node_modules\vite\dist\node\cli.js
• C:\Users\tilab\Desktop\web3.0\client\node_modules\vite\bin\vite.js C:/Users/tilab/Desktop/web3.0/client/src/index.css at Function.Module._resolveFilename (node:internal/modules/cjs/loader:933:15) at Function.Module._load (node:internal/modules/cjs/loader:778:27) at Module.require (node:internal/modules/cjs/loader:1005:19) at require (node:internal/modules/cjs/helpers:102:18) at Object. (C:\Users\tilab\Desktop\web3.0\client\tailwind.config.js:34:13) at Module._compile (node:internal/modules/cjs/loader:1101:14) at Object.Module._extensions..js (node:internal/modules/cjs/loader:1153:10) at Module.load (node:internal/modules/cjs/loader:981:32) at Function.Module._load (node:internal/modules/cjs/loader:822:12) at Module.require (node:internal/modules/cjs/loader:1005:19

I deployed the script but i didn't get the address ... I checked my codes but it didn't work for me . Any suggest ?

i used " npx hardhat run scripts/deploy.js --network goerli " Compilation finished successfully but transaction address didn't write the console

For more info go to https://hardhat.org/HH100 or run Hardhat with --show-stack-traces at ContractFactory. (C:\Users\ASUS\OneDrive\Desktop\web3.0\smart_contract\node_modules@ethersproject\contracts\src.ts\index.ts:1244:53) at step (C:\Users\ASUS\OneDrive\Desktop\web3.0\smart_contract\node_modules@ethersproject\contracts\lib\index.js:48:23) at Object.next (C:\Users\ASUS\OneDrive\Desktop\web3.0\smart_contract\node_modules@ethersproject\contracts\lib\index.js:29:53) at fulfilled (C:\Users\ASUS\OneDrive\Desktop\web3.0\smart_contract\node_modules@ethersproject\contracts\lib\index.js:20:58) { reason: 'non-payable constructor cannot override value', code: 'UNSUPPORTED_OPERATION', operation: 'overrides.value', value: BigNumber { value: "1000000000000000" } }

I'm in the process of learning how to write smart contracts and make transactions using the Ethereum blockchain.

I'm following your tutorial and it looks like making a transaction and then adding a record of it in the blockchain are two separate actions.

I'm confused as to the gas fee that needs to be paid for making the transaction. And whether another fee needs to then be paid for adding a record of that transaction to the blockchain.

In your code, the transaction itself takes place here:

        await ethereum.request({
          method: "eth_sendTransaction",
          params: [{
            from: currentAccount,
            to: addressTo,
            gas: "0x5208",
            value: parsedAmount._hex,
          }],
        });

1. You seem to have hardcoded a value for the gas fee: 0x5208. But isn't the value constantly changing? When the above method is called, the Metamask extension opens up (I'm assuming, I haven't run the code) and asks the user to confirm the transaction, so I guess maybe it is at that point that the user learns how much they will be paying in gas fees and the 0x5208 I'm looking at above is not what I think it is ?
2. What if you, the developer, want to know the fee the user will be paying at that moment as well ? Is there a ethereum.getCurrentGasFeeFor(value) ?

Once the above transaction is confirmed, then a record of that transaction is added to the blockchain here:

const transactionHash = await transactionsContract.addToBlockchain(addressTo, parsedAmount, message, keyword);

But in the above code there is no indication about the app itself (you the owner of the app, not the user) having to also pay a fee for adding a record of the transaction to the blockchain.

3. I thought that (a) there is a limit on how big the record/block can be and (b) depending on the size of the record/block, the app itself would also have to pay a fee. What if in the above scenario your keyword is a 10byte String or a 800Kb string ?

I would have expected something like:

// pseudocode
let block = { addressTo, parsedAmount, message, keyword }
let fee = computeFeeFor(block)
if (imOkWith(fee)) {
  const transactionHash = await transactionsContract.addToBlockchain(
    block,
    // so that the app is charged for adding this block to the blockchain
    appWalletAddress: '....'
  )
  .....
  ...
} else {
  dealWithTheProblemSomehow() ?
}

Thank you in advance for your help. I understand that this does not qualify as an issue so feel free to close it if you wish.

I have also posted this on SO.

Hi can anyone help me ? I am facing this error and i do not know what to do to solve it. The latest transaction is not showing up. TypeError: transactionContract.getTransactionCount is not a function

getting error browser-external:buffer:9 Module "buffer" has been externalized for browser compatibility. Cannot access "buffer.Buffer" in client code. get @ browser-external:buffer:9 I've tried using the globalThis.Buffer = Buffer ; after using the buffer pack but the error is still there.

Ropsten network on Ethereum will no longer be supported on Alchemy so what should be alternative of this

offical link of alchemy https://docs.alchemy.com/changelog/future-deprecation-of-ropsten-kovan-and-rinkeby