Misidentifying non-ERC-20 contracts as ERC-20

[lyfsn]

Description

Due to this PR:
https://github.com/blockscout/blockscout/pull/7653/files#diff-f361e4f9074748318960424dc947ccec166d7630df1322526105b22749b7ac37R179

Blockscout will identify any contract that emits this event:

event Deposit(address indexed user, uint256 amount);

Blockscout will incorrectly identify a contract as ERC-20, although it is actually not an ERC-20 contract. This will result in many erroneous queries to the node, such as balanceOf requests.

This whole contract source code example:

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

import "@openzeppelin/contracts/access/Ownable.sol";

contract DepositETH is Ownable {
    event Deposit(address indexed user, uint256 amount);
    mapping(address => uint) public totalDeposits;
    uint256 public totalUniqueDepositors;

    constructor(address initialOwner) Ownable(initialOwner) {}

    receive() external payable {
        uint256 oldValue = totalDeposits[msg.sender];
        if (oldValue == 0) {
            totalUniqueDepositors++;
        }
        totalDeposits[msg.sender] += msg.value;
        emit Deposit(msg.sender, msg.value);
    }

    function getTotalDepositOf(address user) external view returns (uint256) {
        return totalDeposits[user];
    }

    function getTotalDepositFrom(
        address[] calldata users
    ) external view returns (uint256[] memory) {
        uint256[] memory result = new uint256[](users.length);
        for (uint256 i = 0; i < users.length; i++) {
            result[i] = totalDeposits[users[i]];
        }
        return result;
    }

    function withdraw() external onlyOwner {
        payable(owner()).transfer(address(this).balance);
    }
}

1. Deploy it to a network;
2. Send any amount to this contract.

You will get an "Unnamed token":

Type of the installation

Docker-compose

Type of the JSON RPC archive node

Geth

Type of the chain

No response

Link to the page

No response

Steps to reproduce

No response

Backend version

v6.3.0-beta

Frontend version

No response

Elixir & Erlang/OTP versions

Elixir

Operating system

No response

Additional information

No response

[abdouferraq]