Moralis server is asking for master key

Moralis General
#1

I’m trying to subscribe to transactions where a user is involved so I can create triggers on my platform, but when I try to sub, moralis is asking for my master key, which should be a secret.

This code is running in our front-end, and not as a cloud function, I was unable to return a subscription from a cloud function (and i think it isn’t possible)

const query = new (await getMoralis()).Query('EthTransactions')

await query.aggregate([
    // only transactions to or from userAddress
    {
        match: {
            $expr: {
                $or: [
                    { $eq: ['$from_address', address] },
                    { $eq: ['$to_address', address] },
                ],
            },
        },
    },
])

const subscription = await query.subscribe()
subscription.on('create', function(data) {
    console.log(data)
})

image

#2

You may not be able to do an aggregation without master key

#3

How can I do this without exposing the key? Should i be using cloud functions?

#4

Maybe you can do a query without using aggregation

#5

any idea on how i could use moralis to listen to in and out transactions of an address (wallet)?

#6

You can watch an address and all the transactions for that address will be synced in your Moralis server db

#7

In our platform, people can access wallets without owning them (watch only). Therefore we can’t ask them to sign a login message. Due to this, we can’t get our users registered in the database. Is there any other way to watch the transactions/register users in the database?

#8

you can watch an address programmatically:

await Moralis.Cloud.run("watchBscAddress", { address: "ADDRESS".toLowerCase(), "sync_historical":true })
#9

Thank you, this worked!

But now I’m getting this error:

image

I got the “Matic” prefix at: https://docs.moralis.io/moralis-server/automatic-transaction-sync/historical-transactions#chain-prefixes

#10

you can try with Polygon instead of Matic

#11

That worked, thank you so much!

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