Sorting problem of Sophia List

Protocol Features & Updates Generalized Accounts
1

Hi, currently the AEX9 contract will fail to call the (balances) method if the number of users is very large. At present I want to get the leaderboard of AEX9, sort first and then take out. Currently, I always get an error when I call sort, for reasons unknown. Can you take a look at it for me?

This is an aex9 token that has some number of users：

ct_BwJcRRa7jTAvkpzc2D16tJzHMGCJurtJMUBtyyfGi2QjPuMVv

@compiler >= 4.3
include “List.aes”

contract FungibleTokenInterface =

  entrypoint balances : () => map(address, int)


contract FungibleTokenBalances =

    record state = {
        def      : int
     }

    stateful entrypoint
        init : () => state
        init () =
            { def = 0}

   
    stateful entrypoint
        get_balances : (FungibleTokenInterface) => list(address * int)
        get_balances (token) =
            let accounts_list = Map.to_list(token.balances())
            let accounts_sort = List.sort((a, b)=>cmp(a,b), accounts_list)
            List.take(10,accounts_sort)

    function
        cmp : ((address * int), (address * int)) => bool
        cmp((a1, a2), (b1,b2)) = 
            a2>b2

{"call_info":{"caller_id":"ak_idkx6m3bgRr7WiKXuB8EBYBoRqVsaSc6qo4dsd23HKgj3qiCF","caller_nonce":1425,"contract_id":"ct_waCpSKyajqZ8qoqzpBhKLy9f7TwErLi1zaudh2wd1hvLEcQH1","gas_price":1000000000,"gas_used":1579000,"height":408383,"log":[],"return_type":"error","return_value":"cb_Xfbg4g=="}}

1 Like
2

@hanssv.chain
Can you help me？ :grinning:

1 Like
3

Not at my computer so I haven’t looked at the code, but some general advice:

If you have a transaction that returns with error, then do a dry-run of the call - that way you will see the error of the call (on-chain the error message is set to ""). (In this case, since you don’t want to update the contract you don’t need to do an on-chain transaction at all.)

Also if you are doing a potentially large computation you can also try to give it more gas (remember 6M is the max gas for a single micro-block, and thus also for a transaction!)

1 Like
4

@hanssv.chain
Thank you very much. I’m ready to run
But, I can’t handle AEX9 balances if there’s too much data. Do you have any good suggestions for balancing all users of AEX9

5

Split the data in batches? Write more efficient code? Gather a vote to increase the micro-block gas limit?

6

The AEX9 balances function data source it’s a map，If the data in the map is too large, the fetch will fail，Try -run method, the interface will report an error

image
image956×680 118 KB

You can use this contract and call it ，balances function
ct_BwJcRRa7jTAvkpzc2D16tJzHMGCJurtJMUBtyyfGi2QjPuMVv