Keychain

cargo add solana-keychain

use solana_keychain::{Signer, SolanaSigner};

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

// Transaction signing is a capability; `tx` is a VersionedTransaction
if let Some(tx_signer) = signer.as_transaction_signer() {
    let result = tx_signer.sign_transaction(&mut tx).await?;
}

// Or let the umbrella route any backend shape and supply the RPC hop yourself
let signature = signer
    .sign_and_send(&mut tx, |encoded| async move { broadcast(encoded).await })
    .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
);

pip install solana-keychain

import os

from solana_keychain import VaultSignerConfig, create_vault_signer

signer = await create_vault_signer(
    VaultSignerConfig(
        api_base_url="https://vault.example.com:8200",
        token=os.environ["VAULT_TOKEN"],
        key_name="my-solana-key",
        public_key="base58_public_key",
    )
)

# tx is a solders VersionedTransaction
result = await signer.sign_transaction(tx)

go get github.com/solana-foundation/solana-keychain/go/signers/vault/v2@latest

import "github.com/solana-foundation/solana-keychain/go/signers/vault/v2"

signer, err := vault.New(vault.Config{
	VaultAddr: "https://vault.example.com:8200",
	Token:     os.Getenv("VAULT_TOKEN"),
	KeyName:   "my-solana-key",
	Pubkey:    "base58_public_key",
})
if err != nil {
	return err
}

// tx is a *solana.Transaction from solana-go v2
res, err := signer.SignTransaction(ctx, tx)