Aptos Standard Library (AptosStdlib)

The Aptos Standard Library (aptos_std) extends the Move Standard Library with data structures and utilities specific to the Aptos blockchain. It is deployed at address 0x1.

Source: aptos-framework/aptos-stdlib

Key Modules

Data Structures

aptos_std::smart_table

A scalable hash table designed for large datasets. Entries are stored in separate storage slots for parallelism.

use aptos_std::smart_table::{Self, SmartTable};

let table = smart_table::new<address, u64>();
smart_table::add(&mut table, @0x1, 100);
let value = smart_table::borrow(&table, @0x1);

aptos_std::smart_vector

A vector that automatically splits into a table when it grows beyond a threshold.

use aptos_std::smart_vector::{Self, SmartVector};

let sv = smart_vector::new<u64>();
smart_vector::push_back(&mut sv, 42);

aptos_std::simple_map

A simple key-value map backed by a vector. Best for small collections.

use aptos_std::simple_map::{Self, SimpleMap};

let map = simple_map::new<String, u64>();
simple_map::add(&mut map, key, value);

aptos_std::table

A hash-based key-value store where each entry occupies its own storage slot.

use aptos_std::table::{Self, Table};

let t = table::new<address, u64>();
table::add(&mut t, @0x1, 100);

Cryptography

aptos_std::ed25519

Ed25519 signature verification.

aptos_std::multi_ed25519

Multi-signature Ed25519 verification.

aptos_std::secp256k1

Secp256k1 elliptic curve operations (compatible with Ethereum keys).

Utilities

aptos_std::type_info

Get runtime type information for generic types.

use aptos_std::type_info;

fun get_type_name<T>(): String {
    type_info::type_name<T>()
}

aptos_std::math64 / aptos_std::math128

Common math operations like min, max, pow, and sqrt.

use aptos_std::math64;

let max_val = math64::max(10, 20); // 20
let min_val = math64::min(10, 20); // 10

aptos_std::comparator

Generic comparison utilities for ordering values.

aptos_std::string_utils

Extended string formatting and manipulation.

use aptos_std::string_utils;

let formatted = string_utils::to_string(&42u64);

Summary