​
Prerequisites

  • Ensure you have a wallet created.
  • API Key: Ensure you have an API key with the scopes: wallets:signatures.create.

​
Signing a Message

import { useWallet, EVMWallet } from '@crossmint/client-sdk-react-ui';

const { wallet } = useWallet();

const evmWallet = EVMWallet.from(wallet);

const signedMessage = await evmWallet.signMessage(message);

​
Parameters

​
message
string
required
The message to sign.

​
Returns

​
signature
string
The signature of the message.

​
Signing Typed Data

import { useWallet, EVMWallet } from '@crossmint/client-sdk-react-ui';

const { wallet } = useWallet();

const evmWallet = EVMWallet.from(wallet);
const typedData = {
    "types": {
        "EIP712Domain": [{
            "name": "name",
            "type": "string"
        }],
    },
    "primaryType": "Mail",
    "domain": {
        "name": "example.com",
        "version": "1"
    },
    "message": {
        "from": {
            "name": "John Doe"
        },
        "to": {
            "name": "Jane Doe"
        },
        "contents": "Hello, world!"
    }
};
const signedMessage = await evmWallet.signTypedData(typedData);

​
Parameters

​
typedData
TypedData
required
The typed data to sign.

​
Returns

​
signature
string
The signature of the message.