How to Create an Account
Creating an account requires using the System Program createAccount
instruction. The Solana runtime will grant the owner of an account, access to
write to its data or transfer lamports. When creating an account, we have to
preallocate a fixed storage space in bytes (space) and enough lamports to cover
the rent.
import {
SystemProgram,
Keypair,
Transaction,
sendAndConfirmTransaction,
Connection,
clusterApiUrl,
LAMPORTS_PER_SOL,
} from "@solana/web3.js";
(async () => {
const connection = new Connection(clusterApiUrl("devnet"), "confirmed");
const fromPubkey = Keypair.generate();
// Airdrop SOL for transferring lamports to the created account
const airdropSignature = await connection.requestAirdrop(
fromPubkey.publicKey,
LAMPORTS_PER_SOL,
);
await connection.confirmTransaction(airdropSignature);
// amount of space to reserve for the account
const space = 0;
// Seed the created account with lamports for rent exemption
const rentExemptionAmount =
await connection.getMinimumBalanceForRentExemption(space);
const newAccountPubkey = Keypair.generate();
const createAccountParams = {
fromPubkey: fromPubkey.publicKey,
newAccountPubkey: newAccountPubkey.publicKey,
lamports: rentExemptionAmount,
space,
programId: SystemProgram.programId,
};
const createAccountTransaction = new Transaction().add(
SystemProgram.createAccount(createAccountParams),
);
await sendAndConfirmTransaction(connection, createAccountTransaction, [
fromPubkey,
newAccountPubkey,
]);
})();