paritytech/substrate-tip-bot

Recover from connection drops

Closed this issue · 3 comments

joao-paulo-parity commented

From @shawntabrizi on Matrix

2022-02-21 14:27:26          API-WS: disconnected from wss://[kusama-rpc.polkadot.io/](http://kusama-rpc.polkadot.io/): 1006:: Connection dropped by remot$
 peer.                                                                                                                   
2022-02-21 14:39:14          API-WS: disconnected from wss://[rpc.polkadot.io/](http://rpc.polkadot.io/): 1006:: Connection dropped by remote peer. 
2022-02-21 14:39:14        RPC-CORE: health(): Health:: disconnected from wss://[rpc.polkadot.io/](http://rpc.polkadot.io/): 1006:: Connection dropp
ed by remote peer.
2022-02-21 14:44:48          API-WS: disconnected from wss://[kusama-rpc.polkadot.io/](http://kusama-rpc.polkadot.io/): 1006:: Connection dropped by remote
 peer.
2022-02-22 14:20:20          API-WS: disconnected from wss://[rpc.polkadot.io/](http://rpc.polkadot.io/): 1006:: Connection dropped by remote peer.
2022-02-22 14:38:16          API-WS: disconnected from wss://[kusama-rpc.polkadot.io/](http://kusama-rpc.polkadot.io/): 1006:: Connection dropped by remote
 peer.
2022-02-22 14:38:16        RPC-CORE: health(): Health:: disconnected from wss://[kusama-rpc.polkadot.io/](http://kusama-rpc.polkadot.io/): 1006:: Connectio
n dropped by remote peer.
2022-02-22 14:59:58          API-WS: disconnected from wss://[rpc.polkadot.io/](http://rpc.polkadot.io/): 1006:: Connection dropped by remote peer.
2022-02-22 14:59:58        RPC-CORE: health(): Health:: disconnected from wss://[rpc.polkadot.io/](http://rpc.polkadot.io/): 1006:: Connection dropp
ed by remote peer.
2022-02-22 15:29:49          API-WS: disconnected from wss://[kusama-rpc.polkadot.io/](http://kusama-rpc.polkadot.io/): 1006:: Connection dropped by remote
 peer.
2022-02-22 16:20:33          API-WS: disconnected from wss://[rpc.polkadot.io/](http://rpc.polkadot.io/): 1006:: Connection dropped by remote peer.
joao-paulo-parity commented

I'm not familiar with the code but I saw that a WsProvider is created:

substrate-tip-bot/src/bot.ts

Line 23 in 70c5be7

provider = new WsProvider('ws://localhost:9944');

WsProvider emits events when the connection is dropped:
https://github.com/polkadot-js/api/blob/8ba4ed53776a7a71478e229547c7af3d4dc57d63/packages/rpc-provider/src/ws/index.ts#L404

thus I think you should be able to do provider.on("disconnected", callback) or something along those lines (have to look at the source code and documentation for the actual events' names).

Another project has those event handlers implemented, for reference. ApiPromise itself seems to emit events and so you should also be able to do api.on("error", callback) without having to deal with the WsProvider directly.

rzadp commented

Note: #101 has been released to production - we should observe and if the problem does not resurface, close this issue.

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