Blockchain.info wallet API callback

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I am implementing blockchain.info wallet api to my node.js appI got the receive API to work, however the transactions are extremely slow, and the callbacks likewise if they even reach. Other than that it does what i need it to: pass some custom paramaters into the callback url such as customer_id, price, amount_purchased. My question is: How do I pass in multiple values into the label, something like formatting it like this: 

{'user_id': userId, 'order_amount': amount, 'order_price': price}

Jul 4, 2018 in Blockchain by sabby
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