Mastering Blockchain Programming with Solidity

The setApprovalForAll function

The setApprovalForAll() function is used to assign or revoke the full approval rights to the given operator. The caller of the function (msg.sender) is the approver.

The function takes the following arguments:

• to: This is the address of the operator to whom the approval rights should be given or revoked from the approver.
• approved: This is the Boolean representing the approval to be given or revoked, and the argument is based on the following:
  • true: The approval will be given to the operator.
  • false: The approval will be revoked from the operator.

Let's look at the setApprovalForAll() function code:

function setApprovalForAll(address to, bool approved) public {    require(to != msg.sender);    _operatorApprovals[msg.sender][to] ...