hasPermission

Contract: JBOperatorStore​‌

Interface: IJBOperatorStore

Step by step

Whether or not an operator has the permission to take a certain action pertaining to the specified domain.

Definition

function hasPermissions(
  address _operator,
  address _account,
  uint256 _domain,
  uint256[] calldata _permissionIndexes
) external view override returns (bool) { ... }

• _operator is the operator to check
• _account is the account that has given out permission to the operator.
• _domain is the domain that the operator has been given permissions to operate.
• _permissionIndexes are the permission index to check for.
• The view function can be accessed externally by anyone.
• The view function does not alter state on the blockchain.
• The function overrides a function definition from the IJBOperatorStore interface.
• The function returns a flag indicating whether the operator has the specified permission.

Body

1. Make sure the _permissionIndex is one of the 255 indexes in a uint256.

   if (_permissionIndex > 255) revert PERMISSION_INDEX_OUT_OF_BOUNDS();

2. Return true if the bit is flipped on for the specified permission index. Otherwise return false.

   return (((permissionsOf[_operator][_account][_domain] >> _permissionIndex) & 1) == 1)

   Internal references:

   • permissionsOf

Code

/**
  @notice
  Whether or not an operator has the permission to take a certain action pertaining to the specified domain.

  @param _operator The operator to check.
  @param _account The account that has given out permissions to the operator.
  @param _domain The domain that the operator has been given permissions to operate.
  @param _permissionIndex The permission index to check for.

  @return A flag indicating whether the operator has the specified permission.
*/
function hasPermission(
  address _operator,
  address _account,
  uint256 _domain,
  uint256 _permissionIndex
) external view override returns (bool) {
  if (_permissionIndex > 255) revert PERMISSION_INDEX_OUT_OF_BOUNDS();

  return (((permissionsOf[_operator][_account][_domain] >> _permissionIndex) & 1) == 1);
}

Errors

String	Description
PERMISSION_INDEX_OUT_OF_BOUNDS	Thrown if the provided index is more than whats supported in a uint256.

Category	Description	Reward
Optimization	Help make this operation more efficient.	0.5ETH
Low severity	Identify a vulnerability in this operation that could lead to an inconvenience for a user of the protocol or for a protocol developer.	1ETH
High severity	Identify a vulnerability in this operation that could lead to data corruption or loss of funds.	5+ETH