Taking actions on EVM networks

Once a user has consented to delegated actions for their wallet, your app can take certain actions with the user's wallet.

Using @privy-io/server-auth

To execute an EVM RPC request with a delegated wallet, use the PrivyClient's walletApi.rpc method. As a parameter to this method, pass the request to execute with the wallet.

const request = {
  address: '0xb8B849D7647937eB7331Dc7b6C445651A3EC55aE',
  chainType: 'ethereum',
  method: 'eth_signTransaction',
  params: {
    transaction: {
      to: '0xE3070d3e4309afA3bC9a6b057685743CF42da77C',
      value: 100000,
    },
  },
};

const {data} = await privy.walletApi.rpc(request); 
const signedTransaction = data.signedTransaction; 

There are currently three supported EVM actions: personal_sign, eth_signTypedData_v4, and eth_signTransaction.

The request should be an object with one of the following sets of parameters:

Field	Type	Description
address	string	Address of the wallet to take actions with.
chainType	'ethereum'	Chain type of the wallet to take actions with.
method	'personal_sign'	RPC method to execute with the wallet.
params	Object	Parameters for the RPC method to execute with the wallet.
params.message	string | Uint8Array	The string or bytes to sign with the wallet.

Using the REST API

To execute an EVM RPC request with a delegated wallet, make a POST request to:

https://auth.privy.io/api/v1/wallets/rpc

In the request headers, make sure to include Privy's required authentication headers and headers that may be required for your app's delegated actions setup.

Body

In the body of the request, include the following:

Field	Type	Description
address	string	Address of the wallet to take actions with.
chain_type	'ethereum'	Chain type of the wallet to take actions with.
method	'personal_sign'	RPC method to execute with the wallet.
params	Object	Parameters for the RPC method to execute with the wallet.
params.message	string	The message to sign with the wallet. If the message to sign is raw bytes, you must serialize the message as a hexadecimal string.
params.encoding	'utf-8' | 'hex'	The encoding format for params.message. Use utf-8 for a string message and hex for bytes.

Response

If the action is allowed, Privy will send the following fields in the response body:

Field	Type	Description
method	'personal_sign'	The RPC method executed with the wallet.
data	Object	Outputs for the RPC method executed with the wallet.
data.signature	string	An encoded string serializing the signature produced by the user's wallet.
data.encoding	'hex'	The encoding format for the returned signature. Currently, only 'hex' is supported for Ethereum.

Examples

As an example, a sample request to take a delegated action with a wallet might look like the following:

$ curl --request POST https://auth.privy.io/api/v1/wallets/rpc \
-u "<your-privy-app-id>:<your-privy-app-secret>" \
-H "privy-app-id: <your-privy-app-id>" \
-H "privy-authorization-signature: <authorization-signature-for-request>" \
-H 'Content-Type: application/json' \
-d '{
  "address": "0xb8B849D7647937eB7331Dc7b6C445651A3EC55aE",
  "chain_type": "ethereum",
  "method": "personal_sign",
  "params": {
    "message": "Hello, Ethereum.",
    "encoding": "utf-8"
  }
}'

A successful response will look like the following:

{
  "method": "personal_sign",
  "data": {
    "signature": "0x28eac519bf4051a624d4246a5788667baf84dcd7d2a439b314b339013b5cdb4c",
    "encoding": "hex"
  }
}