Rent

Summary

The mplx toolbox rent command returns the rent-exempt balance required for a Solana account of a given size.

• Reads the current rent rate directly from the configured RPC.
• Outputs SOL by default or raw lamports with --lamports.
• Excludes the 128-byte account header when --noHeader is passed.
• Read-only — no transaction is sent.

Quick Reference

The table below summarizes the command's inputs, flags, and common account sizes.

Basic Usage

Pass the account size in bytes as the sole positional argument.

mplx toolbox rent <bytes>

Arguments

The command takes a single positional integer.

• bytes (required): Number of bytes the account will occupy.

Flags

Optional flags adjust the unit and whether the account header is included.

• --noHeader: Ignore the 128-byte account header when calculating rent.
• --lamports: Display the rent cost in lamports instead of SOL.

Examples

These examples cover the common rent-calculation scenarios.

# Rent for a 165-byte SPL token account
mplx toolbox rent 165

# Rent in lamports
mplx toolbox rent 165 --lamports

# Exclude the 128-byte account header
mplx toolbox rent 165 --noHeader

Output

Default output prints the rent-exempt balance in SOL for the given byte size.

--------------------------------
    Rent cost for <bytes> bytes is <amount> SOL
--------------------------------

Notes

• Solana accounts must hold at least the rent-exempt minimum balance to avoid being purged.
• Common sizes: SPL token account = 165 bytes, SPL mint = 82 bytes.