JSON structure for EIP-712 messages clear signing

1. Create the JSON file

How-to

Begin by using this template to create your JSON file. It provides the basic structure required to clear sign EIP-712 messages.
Under the "context" and "EIP712" key, provide the necessary EIP-712 information:
- "deployments": List the chain IDs and contract addresses where the contract is deployed.
- "domain": Define the domain properties such as name, chainId, and verifyingContract.
- "schemas": List the primary type and the associated types used in the message.
Under the "metadata" key, specify the metadata such as the owner of the contract.
Under the "display" key, define how the message fields should be displayed:
- "formats": Specify the intent and list the fields with their paths, labels, and formats.
- "excluded": List any fields that should be excluded from the display.

Example

Below is an example JSON file for OpenSea:

{
  "$schema": "../../specs/erc7730-v1.schema.json",
  "context": {
    "eip712": {
      "deployments": [{ "chainId": 1, "address": "0x7f268357a8c2552623316e2562d90e642bb538e5" }],
      "domain": { "name": "OpenSea", "chainId": 1, "verifyingContract": "0x7f268357a8c2552623316e2562d90e642bb538e5" },
      "schemas": [
        {
          "primaryType": "Order",
          "types": {
            "EIP712Domain": [
              { "name": "name", "type": "string" },
              { "name": "version", "type": "string" },
              { "name": "chainId", "type": "uint256" },
              { "name": "verifyingContract", "type": "address" }
            ],
            "Order": [
              { "name": "exchange", "type": "address" },
              { "name": "maker", "type": "address" },
              { "name": "taker", "type": "address" },
              { "name": "makerRelayerFee", "type": "uint256" },
              { "name": "takerRelayerFee", "type": "uint256" },
              { "name": "makerProtocolFee", "type": "uint256" },
              { "name": "takerProtocolFee", "type": "uint256" },
              { "name": "feeRecipient", "type": "address" },
              { "name": "feeMethod", "type": "uint8" },
              { "name": "side", "type": "uint8" },
              { "name": "saleKind", "type": "uint8" },
              { "name": "target", "type": "address" },
              { "name": "howToCall", "type": "uint8" },
              { "name": "calldata", "type": "bytes" },
              { "name": "replacementPattern", "type": "bytes" },
              { "name": "staticTarget", "type": "address" },
              { "name": "staticExtradata", "type": "bytes" },
              { "name": "paymentToken", "type": "address" },
              { "name": "basePrice", "type": "uint256" },
              { "name": "extra", "type": "uint256" },
              { "name": "listingTime", "type": "uint256" },
              { "name": "expirationTime", "type": "uint256" },
              { "name": "salt", "type": "uint256" },
              { "name": "nonce", "type": "uint256" }
            ]
          }
        }
      ]
    }
  },
  "metadata": { "owner": "Wyvern Exchange Contract" },
  "display": {
    "formats": {
      "Order": {
        "intent": "OpenSea Listing",
        "fields": [
          { "path": "exchange", "label": "Contract address", "format": "raw" },
          { "path": "basePrice", "label": "Price", "format": "raw" },
          { "path": "expirationTime", "label": "Offer expiration", "format": "raw" }
        ],
        "excluded": [
          "side",
          "extra",
          "saleKind",
          "staticTarget",
          "target",
          "howToCall",
          "makerRelayerFee",
          "feeMethod",
          "replacementPattern",
          "takerRelayerFee",
          "taker",
          "listingTime",
          "staticExtradata",
          "makerProtocolFee",
          "takerProtocolFee",
          "paymentToken",
          "calldata",
          "salt",
          "feeRecipient",
          "maker"
        ]
      }
    }
  }
}

2. Submit your file

Follow this process to submit your file

JSON Builder for smart contract clear signing JSON structure for smart contract clear signing