signing recursive data structure EIP-712

gistfile1.txt

def sign_seller_signature():
    def sign_seller_signature(
        contract,
        sellers_signing_account: Account,  # NOTE: Must be a eth_key account, not Brownie
        seller_address,
        seller_erc20_address,
        seller_info,
    ):
        name = "Ampleia"
        version = contract.apiVersion()
        # import pdb
        #
        # pdb.set_trace()
        data = {
            "types": {
                "EIP712Domain": [
                    {"name": "name", "type": "string"},
                    {"name": "version", "type": "string"},
                    {"name": "chainId", "type": "uint256"},
                    {"name": "verifyingContract", "type": "address"},
                ],
                "SellerERC721Addresses": [
                    {"name": "addr", "type": "address"},
                ],
                "SellerInfo": [
                    {"name": "addr", "type": "address"},
                    {"name": "erc20_address", "type": "address"},
                    {
                        "name": "seller_erc721_addresses",
                        "type": "SellerERC721Addresses",
                    },
                ],
            },
            "domain": {
                "name": name,
                "version": version,
                "chainId": chain_id(),
                "verifyingContract": str(contract),
            },
            "primaryType": "SellerInfo",
            "message": {
                "addr": seller_address,
                "erc20_address": seller_erc20_address,
                "seller_erc721_addresses": {
                    "addr": "0x0FD4C4Ef9Bbe66217Eb790E5D42A5cC103eeFC90",
                },
            },
        }
        seller_data = encode_structured_data(data)

        return sellers_signing_account.sign_message(seller_data).signature

    return sign_seller_signature