Change the way we compute a TX "total amount"

[mvaivre]

Let’s display the delta amount instead of the “total” summed up amount.

• For normal TXs, let’s label this amount as “transferred amont”
• For dApp TXs, let’s change the label to “Approved amount”? Or “Used amount”?

For context the discussion started with the following feedback:

It seems the fixed outputs are not subtracted when calculating the delta amounts for pending transactions.

[nop33]

We are talking about the transaction page, right? To compute a delta, we need to consider one of the transaction addresses as the reference address. How will we know which address to consider as the reference address? In the wallets it's easy, we consider the wallet addresses as the reference address.

[mvaivre]

I'll send you the link to the discussion on Slack for the details, but here's a summary for now (proposed by Cheng):

We could:

• for normal tx, pending tx is the same as block tx, the total amount should be the transferred amount?
• for dApp tx, (the input - the output) would be the approved amount for dapp operation. So we could show more precise info here. Once the tx is included into a block, there will be new outputs from contract execution. Both could be done unified when there is a single sender. We just show the delta amount (input of sender - output of sender).

It's a bit trickier for txs with multiple senders though. We could either don't show it or show the delta amount of all of the senders, or other proper ways.

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We're not trying to define the direction (+ or minus), but just the absolute delta. We can look at the change value (returned to the sender) and keep the rest as the actual transferred value, no? It's just not possible in case there are multiple senders.

We could for this case show multiple transferred values.