Agent skill
aptos-token-standards
Expert on Aptos token standards including fungible tokens (Coin framework, Fungible Asset), NFTs (Digital Asset/Token V2), collections, metadata, minting, burning, royalties, and transfer patterns.
Install this agent skill to your Project
npx add-skill https://github.com/raintree-technology/claude-starter/tree/main/skills/aptos/token-standards
Metadata
Additional technical details for this skill
- author
- raintree
- version
- 1.0
SKILL.md
Aptos Token Standards Expert
Expert on Aptos token standards for fungible and non-fungible tokens.
Triggers
- token, nft, fungible asset
- coin, digital asset, collection
- mint, burn, metadata, royalty
- Token V1, Token V2
Token Frameworks Overview
| Framework | Type | Status | Use For |
|---|---|---|---|
| Coin (0x1::coin) | Fungible | Current | Simple tokens, APT |
| Fungible Asset | Fungible | Current | Advanced features |
| Token V1 (0x3) | NFT | Deprecated | Legacy only |
| Digital Asset (0x4) | NFT | Current | All new NFTs |
Coin Framework
Create Coin
module my_addr::my_coin {
use aptos_framework::coin;
struct MyCoin {}
struct Caps has key {
mint_cap: coin::MintCapability<MyCoin>,
burn_cap: coin::BurnCapability<MyCoin>,
}
fun init_module(sender: &signer) {
let (burn_cap, freeze_cap, mint_cap) = coin::initialize<MyCoin>(
sender,
string::utf8(b"My Coin"),
string::utf8(b"MYC"),
8, // decimals
true, // monitor_supply
);
move_to(sender, Caps { mint_cap, burn_cap });
}
}
Coin Operations
// Mint
let coins = coin::mint(amount, &caps.mint_cap);
coin::deposit(recipient, coins);
// Burn
let coins = coin::withdraw<MyCoin>(account, amount);
coin::burn(coins, &caps.burn_cap);
// Transfer
coin::transfer<MyCoin>(from, to, amount);
// Balance
coin::balance<MyCoin>(account);
// Register to receive
coin::register<MyCoin>(account);
Fungible Asset Framework
Create Fungible Asset
use aptos_framework::fungible_asset::{Self, MintRef, BurnRef, TransferRef};
use aptos_framework::primary_fungible_store;
struct Refs has key {
mint_ref: MintRef,
burn_ref: BurnRef,
transfer_ref: TransferRef,
}
fun init_module(admin: &signer) {
let constructor_ref = &object::create_named_object(admin, b"MY_FA");
primary_fungible_store::create_primary_store_enabled_fungible_asset(
constructor_ref,
option::none(), // max_supply
string::utf8(b"My FA"),
string::utf8(b"MFA"),
8,
string::utf8(b"https://icon.png"),
string::utf8(b"https://project.com"),
);
move_to(admin, Refs {
mint_ref: fungible_asset::generate_mint_ref(constructor_ref),
burn_ref: fungible_asset::generate_burn_ref(constructor_ref),
transfer_ref: fungible_asset::generate_transfer_ref(constructor_ref),
});
}
FA Operations
// Mint
let fa = fungible_asset::mint(&refs.mint_ref, amount);
primary_fungible_store::deposit(recipient, fa);
// Burn
let fa = primary_fungible_store::withdraw(holder, amount);
fungible_asset::burn(&refs.burn_ref, fa);
// Freeze
fungible_asset::set_frozen_flag(&refs.transfer_ref, account, true);
Digital Asset (NFT - Token V2)
Create Collection
use aptos_token_objects::collection;
collection::create_unlimited_collection(
creator,
string::utf8(b"Description"),
string::utf8(b"Collection Name"),
option::none(), // royalty
string::utf8(b"https://collection.uri"),
);
// Or fixed supply
collection::create_fixed_collection(creator, description, max_supply, name, royalty, uri);
Mint NFT
use aptos_token_objects::token;
let constructor_ref = token::create_named_token(
creator,
collection_name,
string::utf8(b"Description"),
token_name,
option::none(), // royalty
string::utf8(b"https://token.uri"),
);
// Transfer to recipient
let transfer_ref = object::generate_transfer_ref(&constructor_ref);
let linear_ref = object::generate_linear_transfer_ref(&transfer_ref);
object::transfer_with_ref(linear_ref, recipient);
NFT Properties
use aptos_token_objects::property_map;
let mutator_ref = property_map::generate_mutator_ref(&constructor_ref);
property_map::add_typed(&mutator_ref, string::utf8(b"level"), 1u64);
property_map::add_typed(&mutator_ref, string::utf8(b"rarity"), string::utf8(b"legendary"));
// Update later
property_map::update_typed(&mutator_ref, &string::utf8(b"level"), 2u64);
NFT Transfer & Burn
// Transfer
object::transfer(owner, token_object, recipient);
// Burn
token::burn(owner, token_object);
Royalties
use aptos_token_objects::royalty;
let royalty = royalty::create(
5, // numerator (5%)
100, // denominator
payee_address
);
collection::create_unlimited_collection(
creator, description, name,
option::some(royalty), // royalty
uri
);
Comparison
Coin vs Fungible Asset
| Feature | Coin | Fungible Asset |
|---|---|---|
| Simplicity | Simple | More complex |
| Flexibility | Limited | Extensive |
| Freeze/Pause | Yes | Yes (more control) |
| Adoption | Wide | Growing |
Token V1 vs Digital Asset
| Feature | Token V1 | Digital Asset |
|---|---|---|
| Object model | No | Yes |
| Composability | Limited | High |
| Soul-bound | No | Yes |
| Status | Deprecated | Current |
Best Practices
- Use Digital Asset for all new NFT projects
- Use Fungible Asset for advanced token features
- Store capability refs securely
- Validate inputs before minting
- Consider upgrade patterns early
- Test thoroughly before mainnet
TypeScript Integration
// Coin balance
const balance = await aptos.getAccountCoinAmount({
accountAddress: "0x...",
coinType: "0x1::aptos_coin::AptosCoin"
});
// NFTs
const tokens = await aptos.getAccountOwnedTokens({ accountAddress: "0x..." });
// Token data
const data = await aptos.getDigitalAssetData({ digitalAssetAddress: "0x..." });
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