Create Account

The following instructions are part of the System Program and MPL System Extras Program. You can learn more about the System Program in Solana's official documentation.

This instruction allows you to create a new uninitialized account on Solana. You can specify the account's size and the program that will own it.

import { generateSigner } from '@metaplex-foundation/umi'
import { createAccount } from '@metaplex-foundation/mpl-toolbox'

const newAccount = generateSigner(umi)
const space = 42

await createAccount(umi, {
  newAccount,
  payer: umi.payer
  lamports: await umi.rpc.getRent(space),
  space,
  programId: umi.programs.get('myProgramName').publicKey,
}).sendAndConfirm(umi)

Create Account with Rent

This instruction allows you to create new accounts without needing to manually fetch the rent exemption. It leverages the Rent sysvar within the program to compute the rent exemption based on the provided space attribute, and then performs a CPI (Cross-Program Invocation) call to the SPL System program to create the account with the calculated rent.

Advantages: By using this instruction, clients avoid the need for an extra HTTP request to fetch the rent exemption from the RPC node, streamlining the process.

Limitations: Since this instruction involves a CPI call, the maximum account size that can be created is limited to 10KB, compared to 10MB when using the SPL System program directly.

import { generateSigner } from '@metaplex-foundation/umi'
import { createAccountWithRent } from '@metaplex-foundation/mpl-toolbox'

const newAccount = generateSigner(umi)
const space = 42

await createAccountWithRent(umi, {
  newAccount,
  payer: umi.payer,
  space,
  programId: umi.programs.get('myProgramName').publicKey,
}).sendAndConfirm(umi)