Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Add reconnect logic #247

Open
wants to merge 4 commits into
base: main
Choose a base branch
from
Open

Add reconnect logic #247

Changes from all commits
Commits
Show all changes
4 commits
Select commit Hold shift + click to select a range
879bc78
Add reconnect logic
markdavison May 16, 2022
ea74b05
Improve logging
markdavison May 16, 2022
714c8d2
Merge remote-tracking branch 'origin/main' into add-reconnect-logic
markdavison May 17, 2022
0fe9a89
Default to Polkadot
markdavison May 17, 2022
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
82 changes: 48 additions & 34 deletions graphql-server/src/substrateApi.ts
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -1,46 +1,60 @@
import { ApiPromise, WsProvider } from '@polkadot/api';
import {ApiPromise, WsProvider} from '@polkadot/api';

export type SubstrateNetwork = 'kusama' | 'polkadot' | 'litmus' | 'khala';

// TODO: get ws providers from .env
const polkadotWsProvider = new WsProvider('wss://rpc.polkadot.io');
const kusamaWsProvider = new WsProvider(
'wss://kusama.api.onfinality.io/public-ws',
);
const phalaWsProvider = new WsProvider(
'wss://khala.api.onfinality.io/public-ws',
);
const khalaWsProvider = new WsProvider(
'wss://khala.api.onfinality.io/public-ws',
);
const litmusWsProvider = new WsProvider(
'wss://rpc.litmus-parachain.litentry.io',
);

export async function initSubstrateApi() {
const polkadotApi = await ApiPromise.create({ provider: polkadotWsProvider });
await polkadotApi.isReady;

const kusamaApi = await ApiPromise.create({ provider: kusamaWsProvider });
await kusamaApi.isReady;
const providers = {
polkadot: new WsProvider('wss://rpc.polkadot.io'),
kusama: new WsProvider(
'wss://kusama.api.onfinality.io/public-ws'
),
khala: new WsProvider(
'wss://khala.api.onfinality.io/public-ws'
),
litmus: new WsProvider(
'wss://rpc.litmus-parachain.litentry.io'
)
};

const khalaApi = await ApiPromise.create({ provider: khalaWsProvider });
await khalaApi.isReady;
const apiPromises = [];
const apis = {};

const litmusApi = await ApiPromise.create({ provider: litmusWsProvider });
await litmusApi.isReady;
const reconnect = async (api, network) => {
if (api.isConnected) {
console.log(`${network} is connected`);
return;
}

return (network?: SubstrateNetwork) => {
switch (network) {
case 'kusama':
return kusamaApi;
case 'litmus':
return litmusApi;
case 'khala':
return khalaApi;
console.log(`${network} is disconnected - reconnecting`);
await api.connect();

default:
return polkadotApi;
if (api.isConnected) {
console.log(`${network} has reconnected`);
} else {
console.error(`${network} failed to reconnect`);
}
};
}

for (const [network, wsProvider] of Object.entries(providers)) {
apiPromises.push(async () => {
const api = await ApiPromise.create({provider: wsProvider});
await api.isReady;

api.once('error', async error => {
console.error(`${network}: ${JSON.stringify(error)}`);
await reconnect(api, network);
});

api.once('disconnected', async () => {
await reconnect(api, network);
})

apis[network] = api;
})
}

await Promise.allSettled(apiPromises);
return (network?: SubstrateNetwork) => apis[network || 'polkadot'];
}