Jaco Greeff
0e6d138b1f
* Bump example deps * System events example * Example comments * Link to example in docs * Typo in own surname, tsk, tsk... * Update README.md
34 lines
1.0 KiB
JavaScript
Executable File
34 lines
1.0 KiB
JavaScript
Executable File
// Import the API
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const { ApiPromise } = require('@polkadot/api');
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async function main () {
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// Create our API with a default connection to the local node
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const api = await ApiPromise.create();
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// subscribe to system events via storage
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api.query.system.events((events) => {
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console.log(`\nReceived ${events.length} events:`);
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// loop through the Vec<EventRecord>
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events.forEach((record) => {
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// extract the phase, event and the event types
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const { event, phase } = record;
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const types = event.typeDef;
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// show what we are busy with
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console.log(`\t${event.section}:${event.method}:: (phase=${phase.toString()})`);
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console.log(`\t\t${event.meta.documentation.toString()}`);
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// loop through each of the parameters, displaying the type and data
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event.data.toArray().forEach((data, index) => {
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console.log(`\t\t\t${types[index].type}: ${data.toString()}`);
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});
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});
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});
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}
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main().catch((error) => {
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console.error(error);
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process.exit(-1);
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});
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