How to query state of past block?

[bbaktaeho]

Can’t I get the state of past blocks on Tron?
For example, I want to check the TRC-20 balance owned by account in 10000 block.

See docs,

QUANTITY|TAG - currently, only "latest" is available. 

Isn't there a solution not only for JSONRPC but also for other APIs?

[laurenceja]

@bbaktaeho As I know, now it does not support to query a TRC20 token balance on a past block directly. Alternatively, we can get the events about accounts, and save the balance changes to realize this function indirectly.

[bbaktaeho]

@laurenceja Thanks.
I want query the historical balance of TRC-20. But, currently not possible in the tron ​​java client.

[DongDongSunny]

you could see all the transactions related to your own easily use transcan, like this link, choose the Type to "Trigger Smart Contract" and choose the change balance method like "Transfer" or your customised method

[S1ep]

@bbaktaeho As I know, now it does not support to query a TRC20 token balance on a past block directly. Alternatively, we can get the events about accounts, and save the balance changes to realize this function indirectly.

@laurenceja Do you know any tron data statistical provider provide the function?