Stefanie Doll
2433d8d1fc
* Docs: Fixed keyring examples * Docs: Added Rx examples * [Docs] Added timeout to showcase unsubscribe method in ApiPromise * [Docs] Added timeout to showcase unsubscribe method in ApiPromise * [Docs] Added comments to read_storage example * [Docs] Renamed "transfer_dots' to a more generic 'make_transfer' since it's not only DOT's * [Docs] ApiRx examples for simple_connect, listen_to_blocks (incl. unsubscribe), listen_to_balance_change and read_storage * [Docs] changed back keyring import syntax to require * [Docs] Removed provider from read storage example * [Docs] ApiRx "make transfer" example * [Docs] ApiRx "system events" example * [Docs] ApiRx "transfer events" example * [Docs] Removed unused utility functions import * [Docs] ApiRx 'upgrade chain' example * [Docs] removed generated html files * [Docs] Ficed wrong Readme of listen to blocks example * [Docs added missing import] * [Docs] Removed unsubscribe() example from 'listen to blocks' * [Docs] Added Unsubscribe example for ApiPromise and ApiRx * [Docs] Added links to summary * [Docs] Removed duplicate info/comment from 04_unsubscribe * [Docs] Fixed wording * [Docs] Log actual transaction status in "make_transfer" * [Docs] Changed author name * [Docs] Log actual transaction status in "make_transfer" * [Docs] changed headline of make_transfer example README's * [Docs] changed status.value to status.asFinalised * [Docs] Removed auto-generated html * [Docs] Changed all occurances of status.value.toHex() to status.asFinalised.toHex() * [Docs] Remove call to nonce observable from signAndSend examples * [Docs] Use RxJs' zip() operator instead of 'await Promise.all()' * [Docs] Remove call to nonce observable from 'upgrade_chain' example * [Docs] Changed author * [Docs] Changed wording of balance change example * [Docs] smaller code-review fixes * [Docs] Fix Rx read_storage example * [Docs] use pairwise together with startWith in the Rx balance_change example * [Docs] Wording & little less code * [Docs] Added whitespace * [Docs] Use switchMap instead fo subscribe inside subscribe syntax * [Docs] Fixed import syntax for RxJs examples * [Docs] removed provider * [Docs] WIP read storage make-over * [Docs] update Rx read_storage * [Docs] Read storage example with piped switchMap() * [Docs] Turn null into observable * [Docs] Read storage example added 2nd version using tap() * [Docs] fixed name typo * [Docs] removed tap() example
27 lines
849 B
JavaScript
27 lines
849 B
JavaScript
// Required imports
|
|
const { zip } = require('rxjs');
|
|
const { ApiRx } = require('@polkadot/api');
|
|
const { WsProvider } = require('@polkadot/rpc-provider');
|
|
|
|
function main () {
|
|
// Initialise the provider to connect to the local node
|
|
const provider = new WsProvider('ws://127.0.0.1:9944');
|
|
|
|
// Create the API and wait until ready
|
|
const api = await ApiRx.create(provider).toPromise();
|
|
|
|
// We're using RxJs 'zip()' combination operator to get the emitted values
|
|
// of multiple observables as an array
|
|
zip(
|
|
api.rpc.system.chain(),
|
|
api.rpc.system.name(),
|
|
api.rpc.system.version()
|
|
)
|
|
// Then we subscribe to the result
|
|
.subscribe(([chain, nodeName, nodeVersion]) => {
|
|
console.log(`You are connected to chain ${chain} using ${nodeName} v${nodeVersion}`);
|
|
});
|
|
}
|
|
|
|
main().catch(console.error).finally(() => process.exit());
|