Ethapppleaseenablecontractdata please enable contract data on the ethereum app settings

Set up and use MyEtherWallet

Install the Ethereum app on your Ledger device to manage ETH and ERC20 tokens with MyEtherWallet . The Ethereum app is developed and supported by Ledger. Check the MyetherWallet page to learn more.

Before you start

• Set up Ledger Live with your Ledger device.
• Update the firmware on your Ledger hardware wallet.
• Get Google Chrome or Firefox.

Install the Ethereum app

1. Open the Manager in Ledger Live.
2. Connect and unlock your Ledger device.
3. If asked, allow the manager on your device.
4. Find Ethereum in the app catalog.
5. Click the Install button of the app.
   • An installation window appears.
   • Your device will display Processing.
   • The app installation is confirmed.

Enable Contract data

If you want to send ERC-20 tokens, you need to activate contract data on your device. Otherwise, invalid status 6a80 is returned.

To enable contract data:

1. Connect and unlock your Ledger device.
2. Open the Ethereum application.
3. Press the right button to navigate to Settings. Then press both buttons to validate.
4. In the Contract data settings, press both buttons to allow contract data in transactions.
   The device displays Allowed.

Troubleshooting: U2F timeout in Chrome

Due to changes in Chrome, U2F timeout issues on web apps like MyEtherWallet may occur. Please ensure your Ledger device runs the latest firmware and reinstall the app in the Manager.

If you’re still facing U2F timeout issues, try the following solutions:

• D eactivate the Bluetooth connection on your Ledger Nano X: simply hold both buttons to access Control Center where Bluetooth can be directly disabled.
• U pdate USB drivers on Windows

Next steps

• Check the MyEtherWallet user guide for setup instructions.
• Reach out to MyEtherWallet via email for support.

Please note the derivation paths used by Ledger Live and the Ledger Wallet Ethereum Chrome app:

• Ledger Live creates new ETH accounts in the path: m/44’/60’/0’/0.
• Ledger Wallet Ethereum Chrome App uses the path: m/44’/60’/0′.

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Theta Web Wallet adds support for Ledger/Trezor hardware wallets

The Theta web wallet now supports Ledger and Trezor devices! See below for access instructions and troubleshooting.

Accessing existing THETA/TFUEL tokens on a Ledger/Trezor device:

1. Go to the Theta web wallet and click “Hardware”

2. Choose your hardware wallet (Ledger or Trezor)

3. For Nano Ledger: Make sure the Ethereum app is open on your hardware wallet (Theta is its own blockchain, but hardware wallet access leverages the Ethereum app since Ethereum and Theta use compatible cryptography)

4. Select your address that your THETA and/or TFUEL tokens are stored on, then click “Access My Wallet”

5. Your wallet has now been unlocked, and you can send/receive THETA/TFUEL tokens on the Theta mainnet blockchain.

Creating a new Theta wallet on Ledger/Trezor:

To create a new Ledger/Trezor wallet that can hold THETA and/or TFUEL tokens, simply make a new ETH address. While Theta is its own standalone blockchain, it uses the same SHA-3 cryptography that Ethereum does, so addresses use the same format. Once you create the new ETH address via Ledger/Trezor and send your THETA/TFUEL tokens there, you can access them using the instructions at the top of this blog.

Troubleshooting

When I initiate a send transaction, I don’t see any data for the number of tokens being sent or the receiving address on my hardware wallet:

This is normal — Ledger Nano has not created a native app for Theta blockchain yet. The transfer will be safely made according to what is displayed in the Theta web wallet in your browser after you click “Confirm & Send” in the Theta web wallet and click the check mark / confirm on your Ledger device.

My transaction won’t send from Ledger Nano, or I tried to send THETA or TFUEL and received an error message “Please enable Contract data on the Ethereum app Settings”

You’ll need to enable Contract Data in the Ethereum app on your Ledger device. On your Nano device, inside the Ethereum app, click “Settings”, then “Contract Data”, then set it to “Yes”.

You may also need to turn OFF the “Display Data” option in your Ledger’s Ethereum app, then send your transaction again.

Finally, try enabling Browser Support in the Ethereum app on your Nano Ledger. This can be done in the app settings menu. Instructions are also here:

I can access my Nano Ledger via the Theta web wallet, but my address isn’t one of the addresses displayed:

Try using one of the alternate Ledger derivation paths from the drop down menu.

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Please Enable Contract Data on The Ethereum App Settings

Theta Web Wallet adds support for Ledger/Trezor hardware wallets

The Theta web wallet now supports Ledger and Trezor devices! See below for access instructions and troubleshooting.

Accessing existing THETA/TFUEL tokens on a Ledger/Trezor device:

▪ Go to the Theta web wallet and click «Hardware»
2. Choose your hardware wallet (Ledger or Trezor)

▪ For Nano Ledger: Make sure the Ethereum app is open on your hardware wallet (Theta is its own blockchain, but hardware wallet access leverages the Ethereum app since Ethereum and Theta use compatible cryptography)

▪ Select your address that your THETA and/or TFUEL tokens are stored on, then click «Access My Wallet»
5. Your wallet has now been unlocked, and you can send/receive THETA/TFUEL tokens on the Theta mainnet blockchain.

Creating a new Theta wallet on Ledger/Trezor:

To create a new Ledger/Trezor wallet that can hold THETA and/or TFUEL tokens, simply make a new ETH address. While Theta is its own standalone blockchain, it uses the same SHA-3 cryptography that Ethereum does, so addresses use the same format. Once you create the new ETH address via Ledger/Trezor and send your THETA/TFUEL tokens there, you can access them using the instructions at the top of this blog.

Troubleshooting

When I initiate a send transaction, I don’t see any data for the number of tokens being sent or the receiving address on my hardware wallet:

This is normal — Ledger Nano has not created a native app for Theta blockchain yet. The transfer will be safely made according to what is displayed in the Theta web wallet in your browser after you click «Confirm & Send» in the Theta web wallet and click the check mark / confirm on your Ledger device.

My transaction won’t send from Ledger Nano, or I tried to send THETA or TFUEL and received an error message «Please enable Contract data on the Ethereum app Settings»

You’ll need to enable Contract Data in the Ethereum app on your Ledger device. On your Nano device, inside the Ethereum app, click «Settings», then «Contract Data», then set it to «Yes».

You may also need to turn OFF the «Display Data» option in your Ledger’s Ethereum app, then send your transaction again.
Finally, try enabling Browser Support in the Ethereum app on your Nano Ledger. This can be done in the app settings menu. Instructions are also here:

I can access my Nano Ledger via the Theta web wallet, but my address isn’t one of the addresses displayed:

Try using one of the alternate Ledger derivation paths from the drop down menu.

We expose some experimental, MetaMask-specific methods under the ethereum._metamask property.

Ethereum Provider API

A developer interacts with Infura by sending a request through JSON RPC either over HTTP or WebSocket, as a single request or as a batched array. Requests follow this format:

IT-блоги Ethereum RPCs, Methods, and Calls

Requests follow this format.

1. It’s a bit of code, usually written in Solidity, that compiles down into byte code — which is understood by the Ethereum Virtual Machine (EVM);
2. It’s a means of storage. Think of it as halfway between disc storage and RAM.

Block Data Related

In this tutorial, we leverage the collective experience of our team to bring you an in-depth guide to reading and writing requests to the Ethereum blockchain, using Infura. Key Terms and Concepts

Topics

It s a bit of code, usually written in Solidity, that compiles down into byte code which is understood by the Ethereum Virtual Machine EVM ;. Mined Transactions

You might be wondering what the «data» provided in the request response means:

This isn’t something you can query from within a contract using Solidity, but if you were just wanting to know whether an address holds contract code or not, you can check using your geth console or similar with eg:

How to find out if an Ethereum address is a contract

This leads into a future where smart contracts interact seamlessly with humans and other contracts.

The top-voted answer with the isContract function that uses EXTCODESIZE was discovered to be hackable.

This is not foolproof, it can be subverted by a constructor call, due to the fact that while the constructor is running, EXTCODESIZE for that address returns 0.

An address in Solidity can be an account or a contract (or other things, such as a transaction). When I have a variable x, holding an address, how can I test if it is a contract or not?

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Ethereum (ETH)

Install the Ethereum app on your Ledger hardware wallet to manage Ethereum (ETH) with Ledger Live. The Ethereum app is developed and supported by Ledger. Check the Ethereum wallet page to learn more.

Before you start

• Set up Ledger Live with your Ledger device.
• Ensure your Ledger device runs the latest firmware version.

Install the Ethereum app

1. Open the Manager in Ledger Live.
2. Connect and unlock your device.
3. If asked, allow the manager on your device.
4. Find Ethereum in the app catalog.
5. Click the Install button of the app.
   • Your device will display Processing.
   • The app will be installed.

Smart contracts are currently not supported in Ledger Live. Please use MyEtherWallet or MyCrypto to send to contract addresses.

To send arbitrary data to smart contracts, you need to enable Contract Data in the Ethereum app. Please note that enabling Contract Data means that you can’t properly verify and sign transactions, making them less secure.

For simplicity, you can keep Debug Data disabled. Otherwise, it will make you validate every 32 bytes sent to the contract.

Next steps

• Add your accounts to Portfolio.
• Send or receive crypto assets.
• Manage ERC20 tokens.

Gas Usage

• Ethereum paid for your transactions is called Gas.
• Gas Price: Amount of Ethereum used per unit of Gas. This determines the speed of your transaction.
• Gas Limit: The maximum units of Gas you will pay. If this is set too low, your transaction can fail for running Out of Gas. Only the ETH worth of burnt gas will be deducted from your balance, the amount that was supposed to be sent remains in your account.

  

Troubleshooting

If you have mistakenly sent ETH to an Ethereum based account such as Ethereum Classic, you can use our Eth recovery app to recover your Ethereum. Learn how to use the Eth recovery app in this article.

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Fixing Your Ledger Transaction

If you’ve encountered an error while trying to buy or sell Sets with your Ledger, try these three steps to fix the issue:

Unlock your Ledger.

Enable contract data on your Ledger.

Add ETH to your Ledger for Ethereum network costs.

Unlocking Your Ledger

In order to unlock your Ledger, simply enter your PIN code into your Ledger, and navigate to the «Ethereum» app on your Ledger.

Enabling contract data on your Ledger

To enable contract data on your Ledger:

Unlock your Ledger

Go to «Contract Data»

This allow your Ledger to interact with smart contracts on Ethereum. Since TokenSets uses Ethereum smart contracts under the hood, this option will need to be enabled in order to buy, sell, and do other interactions on the TokenSets site.

Adding ETH to your Ledger for Ethereum network costs

Transactions on TokenSets require ETH in order to pay for network costs. Trying to initiate a transaction when you don’t have ETH to pay for network costs will not result in a successful transaction.

When you view your buy or sell confirmation, you’ll see the amount of network fees you need to pay in order to complete the transaction. Make sure you have enough ETH to cover these Ethereum network fees when you make your transaction.

You can transfer ETH into your account by going into your account page, clicking Receive, then sending some ETH to the address shown in the Receive window. After you’ve successfully transferred in ETH, you can try the transaction again with the proper amount of ETH for network fees.

If this still doesn’t work for you, message one of our team members, and we’ll be here to help you.

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