Zhang Zhuo

After a careful code review, we think it is better not to change the 64 limit, which is a so breaking change. Instead, we think we can change the data...

It seems that you are syncing from scratch (block 0) ? It may takes MONTHS to sync up... Nodes usually sync from state [snapshot](https://developers.iost.io/docs/en/4-running-iost-node/Deployment.html#snapshot-with-pruned-history)

4 hours is TOO LONG... Every time 4 hours? Usually nodes maintained by ourselves just need 2-3 minutes to reboot. Noted this but i am afraid it will not be...

Maybe you can try this: https://developers.iost.io/docs/en/6-reference/EconContract.html#buypayer-receiver-amount

Is 'can_update' in helloworld.abi?

You can paste the js file and abi file here. You can join the slack community for better support: https://iost-community.slack.com

// TODO(not urgent): we should move nonce/sig_verify to the rollup_state_manager process later?

and make dingir-exchange more 'internal service'

https://github.com/Fluidex/dingir-exchange/blob/42c3c814c9d8cc2cd26757f6014c018ad6ed0d7e/src/message/producer.rs#L107 the fix is not right. reopen

Meanwhile, Orderbook from binance