how to save an array to a data collection maintaining index?

Dear All,

I am currently utilising this code:


 let toSave = {
 "transactionId": transaction.id,
 "timestamp": transaction.input.timestamp,
 "senderWallet": transaction.input.address,
 "signature": transaction.input.signature,
 "recipientWallet": transaction.outputs[0].address,
 "recipientReceives": transaction.outputs[0].amount
            };
            wixData.save("validTransactions", toSave)

So transaction is an array that can hold a number of transactions this can be one to a couple of hundred, I am wanting to save each transaction in a database and maintain them in the order that they have been validated.

Is there a need to utilise looping? I have very limited knowledge of how to do this and any help would be amazing.

I look forward to responses,

Si