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Module sui::object_bag

Similar to sui::bag, an ObjectBag is a heterogeneous map-like collection. But unlike sui::bag, the values bound to these dynamic fields must be objects themselves. This allows for the objects to still exist in storage, which may be important for external tools.
The difference is otherwise not observable from within Move.

use std::ascii;
use std::bcs;
use std::option;
use std::string;
use std::vector;
use sui::address;
use sui::dynamic_field;
use sui::dynamic_object_field;
use sui::hex;
use sui::object;
use sui::tx_context;

Struct ObjectBag​

public struct ObjectBag has key, store
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Fields
id: sui::object::UID
the ID of this bag
size: u64
the number of key-value pairs in the bag

Constants​

const EBagNotEmpty: u64 = 0;

Function new​

Creates a new, empty bag

public fun new(ctx: &mut sui::tx_context::TxContext): sui::object_bag::ObjectBag

Function add​

Adds a key-value pair to the bag bag: &mut ObjectBag.
Aborts with sui::dynamic_field::EFieldAlreadyExists if the bag already has an entry with that key k: K.

public fun add<K: copy, drop, store, V: key, store>(bag: &mut sui::object_bag::ObjectBag, k: K, v: V)

Function borrow​

Immutably borrows the value associated with the key in the bag bag: &ObjectBag.
Aborts with sui::dynamic_field::EFieldDoesNotExist if the bag does not have an entry with that key k: K.
Aborts with sui::dynamic_field::EFieldTypeMismatch if the bag has an entry for the key, but the value does not have the specified type.

public fun borrow<K: copy, drop, store, V: key, store>(bag: &sui::object_bag::ObjectBag, k: K): &V

Function borrow_mut​

Mutably borrows the value associated with the key in the bag bag: &mut ObjectBag.
Aborts with sui::dynamic_field::EFieldDoesNotExist if the bag does not have an entry with that key k: K.
Aborts with sui::dynamic_field::EFieldTypeMismatch if the bag has an entry for the key, but the value does not have the specified type.

public fun borrow_mut<K: copy, drop, store, V: key, store>(bag: &mut sui::object_bag::ObjectBag, k: K): &mut V

Function remove​

Mutably borrows the key-value pair in the bag bag: &mut ObjectBag and returns the value.
Aborts with sui::dynamic_field::EFieldDoesNotExist if the bag does not have an entry with that key k: K.
Aborts with sui::dynamic_field::EFieldTypeMismatch if the bag has an entry for the key, but the value does not have the specified type.

public fun remove<K: copy, drop, store, V: key, store>(bag: &mut sui::object_bag::ObjectBag, k: K): V

Function contains​

Returns true iff there is an value associated with the key k: K in the bag bag: &ObjectBag

public fun contains<K: copy, drop, store>(bag: &sui::object_bag::ObjectBag, k: K): bool

Function contains_with_type​

Returns true iff there is an value associated with the key k: K in the bag bag: &ObjectBag with an assigned value of type V

public fun contains_with_type<K: copy, drop, store, V: key, store>(bag: &sui::object_bag::ObjectBag, k: K): bool

Function length​

Returns the size of the bag, the number of key-value pairs

public fun length(bag: &sui::object_bag::ObjectBag): u64

Function is_empty​

Returns true iff the bag is empty (if length returns 0)

public fun is_empty(bag: &sui::object_bag::ObjectBag): bool

Function destroy_empty​

Destroys an empty bag.
Aborts with EBagNotEmpty if the bag still contains values

public fun destroy_empty(bag: sui::object_bag::ObjectBag)

Function value_id​

Returns the ID of the object associated with the key if the bag has an entry with key k: K.
Returns none otherwise

public fun value_id<K: copy, drop, store>(bag: &sui::object_bag::ObjectBag, k: K): std::option::Option<sui::object::ID>