TypeScript SDK: Account (Signer)

Purpose

Guide creation and use of Account (signer) in @aptos-labs/ts-sdk. An Account holds address + key material and can sign transactions and messages. Creating an Account does NOT create the account on-chain; use faucet or transfer to fund it.

ALWAYS

1. Use Account.generate() or Account.fromPrivateKey() only in server/script – never in frontend; use wallet adapter for end users.
2. Load private keys from env (e.g. process.env.PRIVATE_KEY) on server – never hardcode.
3. Use account.accountAddress when building transactions – pass as sender/secondary signers.
4. Use aptos.signAndSubmitTransaction({ signer: account, transaction }) with the same Account instance that holds the key.

NEVER