SIP standards

SIP-010 fungible tokens and SIP-009 NFTs in Scaffold Stacks — stacksdapp add templates, impl-trait rules, and Stacks token standards.

Scaffold Stacks ships starter contracts for fungible tokens (SIP-010) and NFTs (SIP-009). This guide maps the specs to stacksdapp add templates, Clarity functions, and generated frontend hooks.

Contents

• Official specifications
• Scaffold commands
• impl-trait rules
• SIP-010 fungible tokens
• SIP-009 NFTs
• End-to-end workflow
• Customizing templates

Official specifications

Standard	Spec	Stacks docs
SIP-010 (fungible token)	GitHub SIP-010	Create a fungible token
SIP-009 (NFT)	GitHub SIP-009	Create an NFT
Clarity Book (FT)	SIP010 chapter	—
Clarity Book (NFT)	SIP009 chapter	—

Metadata: SIP-016 · SIP-019 metadata updates

Scaffold commands

stacksdapp add my-token --template sip010
stacksdapp add my-nft --template sip009
stacksdapp add legacy-token --template sip010 --clarity-version 5   # if needed

Do not hand-write a token from blog snippets. Use the template — it includes SIP-compatible functions, tests, requirements, and hooks.

Each command creates:

• contracts/contracts/<name>.clar with all required SIP functions
• contracts/tests/<name>.test.ts (if no test file exists)
• [contracts.<name>] entry in Clarinet.toml with correct epoch
• [[project.requirements]] for the mainnet trait (Clarinet simnet type-checking)
• Regenerated hooks in frontend/src/generated/hooks.ts

impl-trait rules

Common mistake

VM Error: use of undeclared trait <sip-010-trait>

Cause: (impl-trait 'sip-010-trait) — a short name with no full SP… contract path.

Never use bare trait names like (impl-trait 'sip-010-trait). Use the full mainnet path or omit for testnet.

Network rules

Network	impl-trait in token contract	Notes
Testnet	Omit (impl-trait …)	No standard trait contract deployed on testnet. Templates ship without impl-trait so testnet deploy succeeds.
Mainnet	Required for wallet listing	Uncomment the mainnet line in the template before deploy
Simnet / tests	Omit (template default)	Clarinet requirement pulls mainnet trait for type-checking only

Mainnet trait addresses

Standard	impl-trait (mainnet only)	[[project.requirements]] (scaffold default)
SIP-010	'SP3FBR2AGK5H9QBDH3EEN6DF8EK8JY7RX8QJ5SVTE.sip-010-trait-ft-standard.sip-010-trait	SP3FBR2AGK5H9QBDH3EEN6DF8EK8JY7RX8QJ5SVTE.sip-010-trait-ft-standard
SIP-009	'SP2PABAF9FTAJYNFZH93XENAJ8FVY99RRM50D2JG9.nft-trait	SP2PABAF9FTAJYNFZH93XENAJ8FVY99RRM50D2JG9.nft-trait

Scaffold templates include a comment with the exact mainnet impl-trait line to uncomment before mainnet deploy.

SIP-010 fungible tokens

Seven functions wallets and apps expect:

Function	Purpose
transfer(amount, sender, recipient, memo)	Move tokens
get-name	Token name
get-symbol	Ticker
get-decimals	Display decimals
get-balance(who)	Balance of principal
get-total-supply	Circulating supply
get-token-uri	Optional metadata URI

The scaffold template also includes:

Function	Access	Notes
mint(amount, recipient)	public	Owner-only; initial supply
set-token-uri(value)	public	Owner-only; emits SIP-019-style print

Default: 6 decimals, owner = deployer at deploy time.

Frontend hooks

import { useMyToken_GetBalance, useMyToken_Transfer, useMyToken_Mint } from '@/generated/hooks';
import { Cl } from '@stacks/transactions';

// read:  useMyToken_GetBalance().call([Cl.principal('ST…')])
// write: useMyToken_Transfer().call([Cl.uint(100), Cl.principal(sender), Cl.principal(recipient), Cl.none()])

Hook naming: use{ContractPascal}_{FunctionPascal}. See Frontend guide for parsing get-balance results.

SIP-009 NFTs

Four functions for NFT interoperability:

Function	Purpose
get-last-token-id	Highest minted id
get-token-uri(token-id)	Metadata URI for id
get-owner(token-id)	Current owner
transfer(token-id, sender, recipient)	Change owner

The scaffold template also includes:

Function	Access	Notes
mint(recipient)	public	Owner-only; auto-increments id
set-base-uri(value)	public	Owner-only; metadata template with {id}
COLLECTION_LIMIT	constant	Default cap u1000

Frontend hooks

import { useMyNft_GetOwner, useMyNft_Mint, useMyNft_Transfer } from '@/generated/hooks';

// useMyNft_GetOwner().call([Cl.uint(1)])
// useMyNft_Transfer().call([Cl.uint(1), Cl.principal(sender), Cl.principal(recipient)])

End-to-end workflow

stacksdapp add my-token --template sip010
stacksdapp check && stacksdapp generate && stacksdapp test
stacksdapp deploy --network testnet --contract my-token --yes   # no impl-trait needed
# For mainnet: uncomment impl-trait line in .clar first, then deploy
stacksdapp dev --network testnet

Same flow for --template sip009.

Customizing templates

Goal	Edit in .clar
Change decimals / collection limit	constants at top
Restrict mint	asserts! on tx-sender
Royalties / marketplace	add functions; keep trait fns compatible
Metadata	set-token-uri / set-base-uri; consider SIP-016 off-chain JSON
Mainnet wallet listing	Uncomment/add mainnet impl-trait line before mainnet deploy

After edits: check → generate → test → deploy.

Trait errors: Troubleshooting