← Solana theorytheory 0/100 · 0%

level 1

Curious · 0 XP

streak

perfect

badges

100 XP to Apprentice

Native Rust · medium

22. Native Rust: Modifying Account Data Length

realloc and rent adjustments.

1 min read2 questionsup to 50 XPtopic 22/100

Read in another language

AI translates the explanation and quiz text while preserving code and answer scoring.

Native programs can resize account storage using `account.realloc(new_len, false)?`. If expanding, additional rent lamports must be transferred in; if shrinking, excess lamports can be refunded.

How to study this topic

1. Read the explanation once end to end, skipping the code.
2. Re-read the code snippets and say out loud what each line does.
3. Answer the quiz without scrolling back — that is the real check.
4. Read every explanation, even for the answers you got right.

Scoring

· Up to 30 XP from quiz accuracy.
· +15 XP for a perfect first attempt.
· +5 XP while a 3-day streak is running.
· 75% or higher marks the topic complete.

Check your understanding

1. What method resizes an account's data buffer in native Rust?
account.realloc(new_len, zero_init)account.resize()account.set_len()account.expand()
2. What is the maximum amount an account can grow in a single realloc call?
10 KB (10,240 bytes)1 MB1232 bytesUnlimited

Badges

First light

Pass your first topic

Sharp shooter

3 perfect first-try quizzes

On a roll

Study 3 days in a row

Week warrior

Study 7 days in a row

Grinder

Earn 500 XP

Deep diver

Earn 1500 XP