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      • Create a wallet
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      • Using the EIP-1193 Provider
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    • Android
      • Create a wallet
      • Send tokens
      • Sign a transaction
      • Simulate a transaction
      • Back up a wallet
      • Recover a wallet
      • Cross-device sessions
      • Manage wallet lifecycle states
      • Connect with WalletConnect
      • Build a WebView
      • Perform swaps
      • Add custom signature hooks
      • MPC progress callbacks
      • Portal API methods
      • Eject a wallet
      • Legacy documentation
        • Back up a wallet
          • Backup Options
        • Recover a wallet
    • React Native
      • Create a wallet
      • Send tokens
      • Sign a transaction
      • Simulate a transaction
      • Back up a wallet
      • Recover a wallet
      • Cross-device sessions
      • Manage wallet lifecycle states
      • Connect with WalletConnect
      • Build a WebView
      • Perform swaps
      • Add custom signature hooks
      • MPC progress callbacks
      • Portal API methods
      • Eject a wallet
      • Legacy documentation
        • Back up a wallet
          • Backup Options
        • Recover a wallet
    • Enclave MPC API
      • Create a client
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      • Sign Ethereum transactions
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  • Reference
    • iOS
      • createWallet
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      • getBalances
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Signing

The Portal instance includes a number of helper functions to allow you to execute Provider requests without having to worry about encoding, request format, or what method to pass in your request. These helper functions allows you to easily sign and submit transactions, sign messages, and even sign typed data.

Raw Requests with the Provider

Estimating Gas

By default, Portal will estimate and populate the gas property in a transaction object if the property is undefined.

To estimate the gas value manually use the eth_estimateGas RPC call and pass in your transaction as the parameter.

Using the Portal Provider with Third Party Libraries

The Portal Web3 Provider can also be used with third-party libraries just like any other Web3 Provider. This will enable you to interact with these libraries like normal, while utilizing Portal's MPC technology under the hood.

And now you are signing transactions with Portal! 🙌 🚀 Next, we'll explore how to simulate a transaction so that you can create smoother experiences for your users.

const chainId = 'eip155:1' // Ethereum Mainnet
const myAddress = await portal.getEip155Address() // Your Ethereum address
const messageToSign = "0x48656c6c6f20576f726c64" // Message must be a hex string

const transactionHash = await portal.request({
    chainId,
    method: 'eth_sign',
    params: [myAddress, messageToSign],
})
const gas = await portal.request({
    chainId: 'eip155:1',
    method: 'eth_estimateGas',
    params: [
        // partial transaction to estimate gas for
        {
            from:"0xFROMADDRESS",
            to:"0xTOADDRESS",
            value:"0xVALUE",
            input:"HASH_OF_CONTRACT_CALL_DATA", // only needed if calling a smart contract
        }
    ]
})

console.log(gas)
// "0x5208"
// Example with `ethers`
const ethersProvider = new ethers.providers.Web3Provider(portal.provider);
  1. Guides
  2. Web

Sign a transaction

Easily use our EIP-1193 provider or custom built functions to make sending and signing transactions easier!

PreviousSend tokensNextSimulate a transaction
  • Signing
  • Raw Requests with the Provider
  • Estimating Gas
  • Using the Portal Provider with Third Party Libraries