function isBnimport { isBn } from "https://dotland.deno.dev/x/polkadot@0.2.35/util/is/bn.ts"; isBn(value: unknown): value is BNExamples import BN from 'https://esm.sh/bn.js@5.2.1'; import { isBn } from 'https://deno.land/x/polkadot@0.2.35/util/mod.ts'; console.log('isBn', isBn(new BN(1))); // => true Parametersvalue: unknownReturnsvalue is BN