core::starknet::storage::map::StorageMapWriteAccess

Provides direct write access to values in a storage Map. Enables directly storing values in the contract’s storage at the address of the given key.

Signature

pub trait StorageMapWriteAccess

Examples

use starknet::ContractAddress;
use starknet::storage::{Map, StorageMapWriteAccess, StoragePathEntry};

#[storage]
struct Storage {
    balances: Map,
    allowances: Map>,
}

fn write_storage(ref self: ContractState, address: ContractAddress) {
    // Write to single mapping
    self.balances.write(address, 100);
    // Write to nested mapping
    self.allowances.entry(owner).write(spender, 50);
}

Trait functions

write

Signature

fn write(self: TMemberState, key: Self::Key, value: Self::Value)

Trait types

Key

Signature

type Key;

Value

Signature

type Value;