Allows the requestor to check if the walletAddress has the required approval to transact the token up to the amount specified. If the walletAddress does not have the required approval, the response will include a transaction to approve the token spend. If the walletAddress has the required approval, the response will return the approval with a null value. If the parameter includeGasInfo is set to true and an approval is needed, then the response will include both the transaction and the gas fee for the approval transaction.
Certain tokens may require that approval be reset before approving a new spend amount. If this condition is detected for the walletAddress and token, the response will include the necessary approval cancellation in the cancel paragraph. When cancel is not applicable, the paragraph will have a null value.