How to Restore a Keypair or Signer

If you have an existing secret key, you can restore your Keypair from it. This allows you to access your wallet and sign transactions in your dApp.

From Bytes

import { createKeyPairSignerFromBytes } from "@solana/kit";

const keypairBytes = new Uint8Array([
  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
]);

const signer = await createKeyPairSignerFromBytes(keypairBytes);
console.log(signer.address);

From Base58 String

import {
  createKeyPairFromBytes,
  createSignerFromKeyPair,
  getBase58Encoder
} from "@solana/kit";

const keypairBase58 =
  "5MaiiCavjCmn9Hs1o3eznqDEhRwxo7pXiAYez7keQUviUkauRiTMD8DrESdrNjN8zd9mTmVhRvBJeg5vhyvgrAhG";

const keypair = await createKeyPairFromBytes(
  getBase58Encoder().encode(keypairBase58)
);
const signer = await createSignerFromKeyPair(keypair);

console.log(signer.address);