Fulfillment format

[bitcoinben1]

Hello i'm trying to develop an aggregator for personal use using directly the seaport contract function matchOrders()
it works great with one item but when i try to submit an order with several items i can't get a proper fulfillments object , i'm on nodejs and using web3.js
example of fulfillments which gives a types/values length mismatch
const offerComponents = [{ orderIndex:0, itemIndex:0 },{ orderIndex:0, itemIndex:0 }];
const considerationComponents =[{ orderIndex:0, itemIndex:1 },{ orderIndex:0, itemIndex:1 }];
const fulfillments = [{ offerComponents: offerComponents, considerationComponents : considerationComponents }]
vars are hardcoded for test purposes

[CostofLivingFree]

Hi Bitcoinben1 - did you find an effective way to do this programmatically by any chance?