Know what ison-chainbefore you act.

pragma solidity ^0.8.24;

contract RiskRouter {
  address public owner;
  mapping(address => bool) trusted;

  event ApprovalMapped(address indexed spender, uint256 value);
  event AuthorityChanged(address indexed previousOwner, address indexed newOwner);

  modifier onlyOwner() {
    require(msg.sender == owner, "NOT_AUTHORIZED");
    _;
  }

  function setTrusted(address target, bool state) external onlyOwner {
    trusted[target] = state;
  }
}

// EIP-1967 implementation slot
bytes32 constant IMPLEMENTATION_SLOT =
  0x360894a13ba1a3210667c828492db98dca3e2076;

function _implementation() internal view returns (address impl) {
  assembly {
    impl := sload(IMPLEMENTATION_SLOT)
  }
}

function upgradeTo(address nextImplementation) external {
  require(msg.sender == admin, "ADMIN_ONLY");
  require(nextImplementation.code.length > 0, "NO_CODE");
  _setImplementation(nextImplementation);
}

function transferFrom(address from, address to, uint256 amount) external returns (bool) {
  uint256 currentAllowance = allowance[from][msg.sender];
  require(currentAllowance >= amount, "ALLOWANCE_EXCEEDED");
  _transfer(from, to, amount);
  emit Transfer(from, to, amount);
  return true;
}

// observed: approval remains open
// inferred: spender can move supported assets

struct Evidence {
  bytes32 subject;
  uint8 confidence;
  bool verified;
}

function classify(bytes32 subject) public view returns (Evidence memory e) {
  e.subject = subject;
  e.confidence = 78;
  e.verified = sourceRegistry[subject];
  return e;
}

// confirmed · inferred · unresolved