eth_signTypedData_v4

Enables passport users to sign EIP-712 structured messages off-chain.

Params

1. Address: string. The address that will sign the message.
2. TypedData: string | Object. A JSON in either string or object form that conforms to the EIP-712 TypedData JSON schema.

Result

Returns a Promise that resolves with a string, representing the resulting hex-encoded signature. For an example on validating the authenticity of this signature, check out this guide.

Example

const address = '0xabb12d14E1d89014F795bA359bBA6De724F5936E'
const typedData = {
    domain: {
        name: 'Ether Mail',
        version: '1',
        chainId,
        verifyingContract: address,
    },
    message: {
        from: {
        name: 'Cow',
        wallet: '0xCD2a3d9F938E13CD947Ec05AbC7FE734Df8DD826',
        },
        to: {
        name: 'Bob',
        wallet: '0xbBbBBBBbbBBBbbbBbbBbbbbBBbBbbbbBbBbbBBbB',
        },
        contents: 'Hello, Bob!',
    },
    primaryType: 'Mail',
    types: {
        EIP712Domain: [
        {
            name: 'name',
            type: 'string',
        },
        {
            name: 'version',
            type: 'string',
        },
        {
            name: 'chainId',
            type: 'uint256',
        },
        {
            name: 'verifyingContract',
            type: 'address',
        },
        ],
        Person: [
        {
            name: 'name',
            type: 'string',
        },
        {
            name: 'wallet',
            type: 'address',
        },
        ],
        Mail: [
        {
            name: 'from',
            type: 'Person',
        },
        {
            name: 'to',
            type: 'Person',
        },
        {
            name: 'contents',
            type: 'string',
        },
        ],
    },
}
const signature = await provider.request({
    method: 'eth_signTypedData_v4',
    params: [address, typedData]
})
console.log(signature) // '0x...'