How to Restore a Keypair

If you already have your secret key or bytes, you can get your Keypair from the secret to test out your dApp.

From Bytes

import { Keypair } from "@solana/web3.js";

const keypair = Keypair.fromSecretKey(
  Uint8Array.from([
    174, 47, 154, 16, 202, 193, 206, 113, 199, 190, 53, 133, 169, 175, 31, 56,
    222, 53, 138, 189, 224, 216, 117, 173, 10, 149, 53, 45, 73, 251, 237, 246,
    15, 185, 186, 82, 177, 240, 148, 69, 241, 227, 167, 80, 141, 89, 240, 121,
    121, 35, 172, 247, 68, 251, 226, 218, 48, 63, 176, 109, 168, 89, 238, 135,
  ]),
);

From base58 String

import { Keypair } from "@solana/web3.js";
import * as bs58 from "bs58";

const keypair = Keypair.fromSecretKey(
  bs58.decode(
    "5MaiiCavjCmn9Hs1o3eznqDEhRwxo7pXiAYez7keQUviUkauRiTMD8DrESdrNjN8zd9mTmVhRvBJeg5vhyvgrAhG",
  ),
);