Add createKeyPairFromPrivateKeyBytes helper

[lorisleiva]

This PR adds a createKeyPairFromPrivateKeyBytes helper that creates a keypair from the 32-byte private key bytes.

import { createKeyPairFromPrivateKeyBytes } from '@solana/keys';

const { privateKey, publicKey } = await createKeyPairFromPrivateKeyBytes(new Uint8Array([...]));

This can be useful when you have a private key but not the corresponding public key or when you need to derive key pairs from seeds. For instance, the following code snippet derives a key pair from the hash of a message.

import { getUtf8Encoder } from '@solana/codecs-strings';
import { createKeyPairFromPrivateKeyBytes } from '@solana/keys';

const message = getUtf8Encoder().encode('Hello, World!');
const seed = new Uint8Array(await crypto.subtle.digest('SHA-256', message));

const derivedKeypair = await createKeyPairFromPrivateKeyBytes(seed);

[changeset-bot]

🦋 Changeset detected

Latest commit: 24d9bdd

The changes in this PR will be included in the next version bump.

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

[lorisleiva]

• Add signers example #3048
• Add createKeyPairSignerFromPrivateKeyBytes helper #3051
• Add createKeyPairFromPrivateKeyBytes helper #3050 👈
• Add getPublicKeyFromPrivateKey helper #3049
• Add support for importing JWK keys in crypto polyfill #3064
• Add support for exporting keys as JWK in crypto polyfill #3063
• master

This stack of pull requests is managed by Graphite. Learn more about stacking.

Join @lorisleiva and the rest of your teammates on Graphite

[mcintyre94]

LGTM!

[steveluscher]

[steveluscher]

[lorisleiva]

Merge activity

• Aug 7, 4:34 AM EDT: @lorisleiva started a stack merge that includes this pull request via Graphite.
• Aug 7, 4:42 AM EDT: Graphite rebased this pull request as part of a merge.
• Aug 7, 4:43 AM EDT: @lorisleiva merged this pull request with Graphite.

[github-actions]

Because there has been no activity on this PR for 14 days since it was merged, it has been automatically locked. Please open a new issue if it requires a follow up.