Stellar: amount is missing in account merge type

[gutenye]

Steps:

1. merge account from A to B
2. load payments from B

It returns { type: 'account_merge', type_i: 8, account: 'x', into: 'x' }，no amount field.

My question is:

1. If I calculate the balance from the history, it failed as I don't know how much funds are received with account_merge type.
2. It must leave a trace in the network, otherwise, how can others validate the balance from history?

[bartekn]

You can find the amount in Effects for Operation endpoint.

[tomerweller]

This is the direct reason why exchanges are not accepting account merges, even though they listen to the payments endpoint. Perhaps we should reopen.

[bartekn]

@ire-and-curses we can think about it for the new API.