This repository contains smart contracts for minting collections and tokens using Solidity in the Unique Schema V2.
Install packages:
npm install @unique-nft/contractsFind the RPC endpoint in the official documentation. You can get OPL (Opal testnet) tokens for free at https://t.me/unique2faucet_opal_bot
Important
Configure your project:
- Compatible Solidity versions are
>=0.8.18 <=0.8.24 - Use via-IR compilation pipeline.
In hardhat.config file set:
solidity: {
version: "0.8.24",
settings: { viaIR: true },
},Represents an attribute of a token.
| Parameter | Type | Description |
|---|---|---|
| trait_type | string |
Type of the attribute. |
| value | string |
Value of the attribute. |
Represents ethereum or substrate account. Only one property can be filled out to consider the structure valid. Learn more about EVM in Unique Network and compatibility with substrate accounts in the official documentation.
The AddressUtils library provides helper methods to work with the CrossAddress struct.
| Parameter | Type | Description |
|---|---|---|
| eth | address |
Ethereum address or address(0) if the origin is substrate account |
| sub | uin256 |
Substrate public key or 0 if the caller is ethereum account |
import "@unique-nft/contracts/CollectionMinter.sol";
Provides functions to create collections in the Unique Schema V2.
constructor(bool _mutable, bool _admin, bool _tokenOwner)
Initializes the contract and sets the default permissions for token properties mutation
_createCollection(string _name, string _description, string _symbol, string _collectionCover)
Creates a collection with specified name, description, symbol, collection cover, and allowed nesting permissions.
import "@unique-nft/contracts/TokenMinter.sol";
Provides functions to create tokens in the Unique Schema V2.
_createToken(address _collectionAddress, string _image, Attribute[] _attributes, CrossAddress _to) internal returns (uint256)
Internal function to create a new token with specified image and attributes in a given collection.
import "@unique-nft/contracts/TokenManager.sol";
Provides utility functions for managing token data, such as setting and retrieving images and traits for tokens within a collection.
_setImage(address _collection, uint256 _tokenId, bytes memory _newImage) internal
Sets a new image for a specific token in a collection.
_setTrait(address _collection, uint256 _tokenId, bytes memory _traitType, bytes memory _traitValue) internal
Sets a new trait (attribute) for a specific token in a collection.
_getImage(address _collection, uint256 _tokenId) internal view returns (bytes memory)
Retrieves the image data of a specific token in a collection.
_getTraitValue(address _collection, uint256 _tokenId, bytes memory _traitType) internal view returns (bytes memory)
Retrieves the value of a specific trait for a token in a collection.
import "@unique-nft/contracts/AddressValidator.sol";
Provides modifiers for validating addresses in token-related operations, ensuring that the caller is authorized.
onlyTokenOwner(uint256 _tokenId, address collectionAddress
Restricts access to the owner of the token with ID _tokenId in the collection at collectionAddress. Reverts if msg.sender is not the token owner.
onlyMessageSender(CrossAddress memory _crossAddress)
Restricts access to the address represented by _crossAddress. Reverts if _crossAddress does not match msg.sender.
Minter.sol: Demonstrates how to create a gasless experience for minting collections and NFTs.POAP.sol: Demonstrates how to create a POAP contract. Tokens minting sponsored by the POAP contract itself. Every account can mint only one NFT that cannot be transferred.BreedingGame.sol: Demonstrates how contracts can mutate token's attributes and image.
- Install packages and compile contracts
yarn
yarn compile-
Create
.envfile from.env.example -
Set at least two private keys with
OPLbalance toTEST_ACCOUNTS_ETHenv. You can getOPLtokens for free at https://t.me/unique2faucet_opal_bot -
Run tests
yarn test