Yashotantra Academy logo
← Sui Move theorytheory 0/25 · 0%
level 1
Curious · 0 XP
streak
0d
perfect
0
badges
0

100 XP to Apprentice

State Management · hard

15. Dynamic Fields

Attaching arbitrary heterogeneous data to objects dynamically.

1 min read2 questionsup to 50 XPtopic 15/25

Read in another language

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

Dynamic fields (`sui::dynamic_field`) allow adding and removing fields of arbitrary names and types to an existing on-chain object without upgrading module schemas.

move
use sui::dynamic_field as df;

df::add(&mut parent.id, b"custom_attribute", 100u64);
let val: &u64 = df::borrow(&parent.id, b"custom_attribute");

How to study this topic

  1. 1. Read the explanation once end to end, skipping the code.
  2. 2. Re-read the code snippets and say out loud what each line does.
  3. 3. Answer the quiz without scrolling back — that is the real check.
  4. 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. 1. What are Dynamic Fields on Sui?

  2. 2. What is required as the parent identifier when adding a dynamic field?

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