Keychain

cargo add solana-keychain

use solana_keychain::{Signer, SolanaSigner};

// Create a signer from any backend
let signer = Signer::from_memory("base58_private_key")?;

// All signers share the same interface
let pubkey = signer.pubkey();
let signature = signer.sign_transaction(&mut tx).await?;

pnpm add @solana/keychain

import { createKeychainSigner } from "@solana/keychain";
import { signTransactionWithSigners } from "@solana/signers";

// Create any signer via the unified factory
const signer = await createKeychainSigner({
  backend: "vault",
  vaultAddr: "https://vault.example.com:8200",
  vaultToken: "hvs.xxxxx",
  keyName: "my-solana-key",
  publicKey: "base58_public_key"
});

// Sign an already-compiled transaction
const signedTx = await signTransactionWithSigners(
  [signer],
  compiledTransaction
);