Sign Typed Data

Presents a data message for the user to sign in a structured and readable format and returns the signed response. This method requires that the user has granted permission to interact with their account first, so make sure to call eth_requestAccounts first.

Request Parameters

Params[0]

Parameter	Type	Required	Description
DATA	String	Yes	The address of the requested signing account. (20 Bytes)

Params[1]

Parameter	Type	Required	Description
types	Object	Yes	Message to sign (N Bytes)
types.EIP712Domain	Array	Yes	An array specifying one or more of the following domain separator values below
domain	Object	Yes	Contains the domain separator values specified in the EIP712Domain type
primaryType	String	Yes
message	Object	Yes	The message you're proposing the user to sign.

Response Parameters

​

Parameter	Type	Description
DATA	String	signature

Request Example

await window.ethereum.request({
  "method": "eth_signTypedData_v4",
  "params": [
    "0x0000000000000000000000000000000000000000",
    {
      "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"
          }
        ]
      },
      "primaryType": "Person",
      "domain": {
        "name": "Webmax Dapp Example",
        "version": "1",
        "chainId": 1,
        "verifyingContract": "0xCcCCccccCCCCcCCCCCCcCcCccCcCCCcCcccccccC"
      },
      "message": {
        { name: "Bob", age: 25 }
      }
    }
  ]
});

Response Example

"0x4355c47d63924e8a72e509b65029052eb6c299d53a04e167c5775fd466751c9d07299936d304c153f6443dfa05f40ff007d72911b6f72307f996231605b915621c"

​