// SPDX-License-Identifier: MIT
pragma solidity 0.8.23;

import "@openzeppelin/contracts/token/ERC20/ERC20.sol";

/// TEST-ONLY mock (local hardhat — NEVER deploy to chain 2800): ERC20 with
/// configurable decimals + a per-recipient blocklist that makes transfer()
/// RETURN FALSE (no revert). Exercises AereCoreBookV0's push-to-claimable
/// fallback (_payOrCredit, AUDIT FIX R5 MED-8) and the claim(bool) pull path,
/// which plain mocks can never trigger because their transfers always succeed.
contract MockERC20Blocking is ERC20 {
    uint8 private immutable _dec;
    mapping(address => bool) public blocked;

    constructor(string memory n, string memory s, uint8 d) ERC20(n, s) { _dec = d; }
    function decimals() public view override returns (uint8) { return _dec; }
    function mint(address to, uint256 amt) external { _mint(to, amt); }
    function setBlocked(address who, bool isBlocked) external { blocked[who] = isBlocked; }

    function transfer(address to, uint256 amount) public override returns (bool) {
        if (blocked[to]) return false;
        return super.transfer(to, amount);
    }
}
