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getBlockFinalizationSummary.ts
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getBlockFinalizationSummary.ts
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import { parseEndpoint } from '../shared/util.js';
import { BlockFinalizationSummary, BlockHash } from '@concordium/web-sdk';
import { ConcordiumGRPCNodeClient } from '@concordium/web-sdk/nodejs';
import { credentials } from '@grpc/grpc-js';
import meow from 'meow';
const cli = meow(
`
Usage
$ yarn run-example <path-to-this-file> [options]
Options
--help, Displays this message
--block, -b A block to query from, defaults to last final block
--endpoint, -e Specify endpoint of the form "address:port", defaults to localhost:20000
`,
{
importMeta: import.meta,
flags: {
block: {
type: 'string',
alias: 'b',
},
endpoint: {
type: 'string',
alias: 'e',
default: 'localhost:20000',
},
},
}
);
const [address, port] = parseEndpoint(cli.flags.endpoint);
const client = new ConcordiumGRPCNodeClient(
address,
Number(port),
credentials.createInsecure()
);
/**
* Get the summary of the finalization data in a given block. Only finalized
* blocks will return a finalization summary, if the summary is requested for
* a non-finalized block, this will return an object with only the tag field,
* with value "none". If a blockhash is not supplied it will pick the latest
* finalized block.
*/
(async () => {
// #region documentation-snippet
const blockHash =
cli.flags.block === undefined
? undefined
: BlockHash.fromHexString(cli.flags.block);
const summary: BlockFinalizationSummary =
await client.getBlockFinalizationSummary(blockHash);
if (summary.tag === 'record') {
// Response contains finalization summary for the given block:
console.log('block:', summary.record.block);
console.log('index:', summary.record.index);
console.log('delay:', summary.record.delay);
console.log('Amount of finalizers:', summary.record.finalizers.length);
} else {
console.log(
'Given block has not been finalized, and no information can be gotten'
);
}
// #endregion documentation-snippet
})();