import { ed25519PairFromSecret } from "https://deno.land/x/polkadot@0.2.38/util-crypto/ed25519/pair/fromSecret.ts";
Examples
import { ed25519PairFromSecret } from 'https://deno.land/x/polkadot@0.2.38/util-crypto/mod.ts';
ed25519PairFromSecret(...); // => { secretKey: [...], publicKey: [...] }