f: comment on expectedTokens

Author: matiasedgeandnode

packages/subgraph-service/contracts/libraries/IndexingAgreement.sol

@@ -527,6 +527,8 @@ library IndexingAgreement {
             ? 0
             : _tokensToCollect(self, params.agreementId, wrapper.collectorAgreement, data.entities);
 
+        // `tokensCollected` <= `expectedTokens` because the recurring collector will further narrow
+        // down the tokens allowed, based on the RCA terms.
         uint256 tokensCollected = _directory().recurringCollector().collect(
             IGraphPayments.PaymentTypes.IndexingFee,
             abi.encode(