bestNumberLag | /api-derive/chain/index.ts | polkadot@0.2.14

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function bestNumberLag

import { bestNumberLag } from "https://deno.land/x/polkadot@0.2.14/api-derive/chain/index.ts";

bestNumberLag(instanceId: string, api: DeriveApi): () => Observable<BlockNumber>

Examples

api.derive.chain.bestNumberLag((lag) => {
  console.log(`finalized is ${lag} blocks behind head`);
});

instanceId: string

A number of blocks