Using web3, how can you get the tx cost and data/payload for a given transaction?

Question

Using web3, how can you get the Tx cost and data/payload for a given transaction?

getTransaction(tx#) returns everything but those 2 values. This information seems to be available via blockchain explorers such as etherchain.org

Answer 1

web3.eth.getTransaction has an input property, which is the /payload for a given transaction.

The cost of a transaction is gasUsed multiplied by gasPrice.
web3.eth.getTransactionReceipt has the gasUsed property. web3.eth.getTransaction has gasPrice. Since the unit for gasPrice is wei, divide by 1e18 to get the Ether cost of a transaction.