Permissions,
precisely defined.

import "abis/ERC20.json" as Token;

permission BalanceGuard -> 1.0.0 {
  parameters: {
    operator: address,
    token: Token,
    minBalance: uint256
  }

  pub fn authorize() -> bool {
    return authorizedBy(parameters.operator);
  }
  fn main() -> bool {
    let balance = parameters.token.balanceOf(context.account);
    return balance >= parameters.minBalance;
  }
}