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Support for new ERC721 interface

Browse Source 
- Tests for new features are pending
- ERC721 is abstract, since it requires metadata implementation
- Move some methods into DeprecatedERC721 contract
- Reorganise base vs full implementation
- Pending tokenByIndex
pull/803/head
Santiago Palladino 7 years ago
parent ca163a849b
commit 71cbc511ec
17 changed files with 964 additions and 1215 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
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  1. 11
      contracts/AddressUtils.sol
  2. 19
      contracts/mocks/BaseERC721TokenMock.sol
  3. 17
      contracts/mocks/ERC721BasicTokenMock.sol
  4. 27
      contracts/mocks/ERC721TokenMock.sol
  5. 16
      contracts/token/ERC721/BaseERC721.sol
  6. 214
      contracts/token/ERC721/BaseERC721Token.sol
  7. 10
      contracts/token/ERC721/DeprecatedERC721.sol
  8. 35
      contracts/token/ERC721/DeprecatedERC721Token.sol
  9. 23
      contracts/token/ERC721/ERC721.sol
  10. 25
      contracts/token/ERC721/ERC721Basic.sol
  11. 247
      contracts/token/ERC721/ERC721BasicToken.sol
  12. 9
      contracts/token/ERC721/ERC721Holder.sol
  13. 19
      contracts/token/ERC721/ERC721Receiver.sol
  14. 101
      contracts/token/ERC721/ERC721Token.sol
  15. 534
      test/token/ERC721/BaseERC721Token.test.js
  16. 498
      test/token/ERC721/ERC721BasicToken.test.js
  17. 374
      test/token/ERC721/ERC721Token.test.js

11
contracts/AddressUtils.sol
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pragma solidity ^0.4.18;
library AddressUtils {
function isContract(address addr) internal view returns (bool) {
uint size;
assembly { size := extcodesize(addr) }
return size > 0;
}
}

19
contracts/mocks/BaseERC721TokenMock.sol
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pragma solidity ^0.4.18;
import "../token/ERC721/BaseERC721Token.sol";
/**
* @title BaseERC721TokenMock
* This mock just provides a public mint and burn functions for testing purposes.
*/
contract BaseERC721TokenMock is BaseERC721Token {
function BaseERC721TokenMock() BaseERC721Token() public { }
function mint(address _to, uint256 _tokenId) public {
super._mint(_to, _tokenId);
}
function burn(uint256 _tokenId) public {
super._burn(_tokenId);
}
}

17
contracts/mocks/ERC721BasicTokenMock.sol
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pragma solidity ^0.4.18;
import "../token/ERC721/ERC721BasicToken.sol";
/**
* @title ERC721BasicTokenMock
* This mock just provides a public mint and burn functions for testing purposes
*/
contract ERC721BasicTokenMock is ERC721BasicToken {
function mint(address _to, uint256 _tokenId) public {
super.doMint(_to, _tokenId);
}
function burn(uint256 _tokenId) public {
super.doBurn(_tokenId);
}
}

27
contracts/mocks/ERC721TokenMock.sol
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pragma solidity ^0.4.18; pragma solidity ^0.4.18;
import "./BaseERC721TokenMock.sol"; import "./ERC721BasicTokenMock.sol";
import "../token/ERC721/ERC721Token.sol"; import "../token/ERC721/ERC721Token.sol";
/** /**
* @title ERC721TokenMock * @title ERC721TokenMock
* This mock just provides a public mint and burn functions for testing purposes. * This mock just provides a public mint and burn functions for testing purposes,
* and a mock metadata URI implementation
*/ */
contract ERC721TokenMock is ERC721Token, BaseERC721TokenMock { contract ERC721TokenMock is ERC721Token, ERC721BasicTokenMock {
function ERC721TokenMock(string name, string symbol) function ERC721TokenMock(string name, string symbol)
BaseERC721TokenMock() ERC721BasicTokenMock()
ERC721Token(name, symbol) ERC721Token(name, symbol)
public public
{ } { }
// Mock implementation for testing.
// Do not use this code in production!
function tokenURI(uint256 _tokenId) public view returns (string) {
require(exists(_tokenId));
bytes memory uri = new bytes(78);
uint256 i;
uint256 value = _tokenId;
for (i = 0; i < 78; i++) {
uri[7 + 78 - i] = byte(value % 10 + 48);
value = value / 10;
}
return string(uri);
}
} }

16
contracts/token/ERC721/BaseERC721.sol
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pragma solidity ^0.4.18;
/**
* @title Base ERC721 interface
* @dev see https://github.com/ethereum/eips/issues/721 and https://github.com/ethereum/EIPs/pull/841
*/
contract BaseERC721 {
event Transfer(address indexed _from, address indexed _to, uint256 _tokenId);
event Approval(address indexed _owner, address indexed _approved, uint256 _tokenId);
function balanceOf(address _owner) public view returns (uint256 _balance);
function ownerOf(uint256 _tokenId) public view returns (address _owner);
function transfer(address _to, uint256 _tokenId) public;
function approve(address _to, uint256 _tokenId) public;
function takeOwnership(uint256 _tokenId) public;
}

214
contracts/token/ERC721/BaseERC721Token.sol
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pragma solidity ^0.4.18;
import "./BaseERC721.sol";
import "../../math/SafeMath.sol";
/**
* @title BaseERC721Token
* Generic implementation for the required functionality of the ERC721 standard
*/
contract BaseERC721Token is BaseERC721 {
using SafeMath for uint256;
// Total amount of tokens
uint256 private totalTokens;
// Mapping from token ID to owner
mapping (uint256 => address) private tokenOwner;
// Mapping from token ID to approved address
mapping (uint256 => address) private tokenApprovals;
// Mapping from owner to list of owned token IDs
mapping (address => uint256[]) private ownedTokens;
// Mapping from token ID to index of the owner tokens list
mapping(uint256 => uint256) private ownedTokensIndex;
/**
* @dev Guarantees msg.sender is owner of the given token
* @param _tokenId uint256 ID of the token to validate its ownership belongs to msg.sender
*/
modifier onlyOwnerOf(uint256 _tokenId) {
require(ownerOf(_tokenId) == msg.sender);
_;
}
/**
* @dev Gets the total amount of tokens stored by the contract
* @return uint256 representing the total amount of tokens
*/
function totalSupply() public view returns (uint256) {
return totalTokens;
}
/**
* @dev Gets the balance of the specified address
* @param _owner address to query the balance of
* @return uint256 representing the amount owned by the passed address
*/
function balanceOf(address _owner) public view returns (uint256) {
return ownedTokens[_owner].length;
}
/**
* @dev Gets the list of tokens owned by a given address
* @param _owner address to query the tokens of
* @return uint256[] representing the list of tokens owned by the passed address
*/
function tokensOf(address _owner) public view returns (uint256[]) {
return ownedTokens[_owner];
}
/**
* @dev Gets the owner of the specified token ID
* @param _tokenId uint256 ID of the token to query the owner of
* @return owner address currently marked as the owner of the given token ID
*/
function ownerOf(uint256 _tokenId) public view returns (address) {
address owner = tokenOwner[_tokenId];
require(owner != address(0));
return owner;
}
/**
* @dev Gets the approved address to take ownership of a given token ID
* @param _tokenId uint256 ID of the token to query the approval of
* @return address currently approved to take ownership of the given token ID
*/
function approvedFor(uint256 _tokenId) public view returns (address) {
return tokenApprovals[_tokenId];
}
/**
* @dev Transfers the ownership of a given token ID to another address
* @param _to address to receive the ownership of the given token ID
* @param _tokenId uint256 ID of the token to be transferred
*/
function transfer(address _to, uint256 _tokenId) public onlyOwnerOf(_tokenId) {
clearApprovalAndTransfer(msg.sender, _to, _tokenId);
}
/**
* @dev Approves another address to claim for the ownership of the given token ID
* @param _to address to be approved for the given token ID
* @param _tokenId uint256 ID of the token to be approved
*/
function approve(address _to, uint256 _tokenId) public onlyOwnerOf(_tokenId) {
address owner = ownerOf(_tokenId);
require(_to != owner);
if (approvedFor(_tokenId) != 0 || _to != 0) {
tokenApprovals[_tokenId] = _to;
Approval(owner, _to, _tokenId);
}
}
/**
* @dev Claims the ownership of a given token ID
* @param _tokenId uint256 ID of the token being claimed by the msg.sender
*/
function takeOwnership(uint256 _tokenId) public {
require(isApprovedFor(msg.sender, _tokenId));
clearApprovalAndTransfer(ownerOf(_tokenId), msg.sender, _tokenId);
}
/**
* @dev Mint token function
* @param _to The address that will own the minted token
* @param _tokenId uint256 ID of the token to be minted by the msg.sender
*/
function _mint(address _to, uint256 _tokenId) internal {
require(_to != address(0));
addToken(_to, _tokenId);
Transfer(0x0, _to, _tokenId);
}
/**
* @dev Burns a specific token
* @param _tokenId uint256 ID of the token being burned by the msg.sender
*/
function _burn(uint256 _tokenId) onlyOwnerOf(_tokenId) internal {
if (approvedFor(_tokenId) != 0) {
clearApproval(msg.sender, _tokenId);
}
removeToken(msg.sender, _tokenId);
Transfer(msg.sender, 0x0, _tokenId);
}
/**
* @dev Tells whether the given spender is approved for the given token ID or not
* This function is not private so it can be extended in further implementations like the operatable ERC721
* @param _spender address of the spender to query the approval of
* @param _tokenId uint256 ID of the token to query the approval of
* @return bool whether the msg.sender is approved for the given token ID or not
*/
function isApprovedFor(address _spender, uint256 _tokenId) internal view returns (bool) {
return approvedFor(_tokenId) == _spender;
}
/**
* @dev Internal function to clear current approval and transfer the ownership of a given token ID
* @param _from address which you want to send tokens from
* @param _to address which you want to transfer the token to
* @param _tokenId uint256 ID of the token to be transferred
*/
function clearApprovalAndTransfer(address _from, address _to, uint256 _tokenId) internal {
require(_to != address(0));
require(_to != ownerOf(_tokenId));
require(ownerOf(_tokenId) == _from);
clearApproval(_from, _tokenId);
removeToken(_from, _tokenId);
addToken(_to, _tokenId);
Transfer(_from, _to, _tokenId);
}
/**
* @dev Internal function to clear current approval of a given token ID
* @param _tokenId uint256 ID of the token to be transferred
*/
function clearApproval(address _owner, uint256 _tokenId) private {
require(ownerOf(_tokenId) == _owner);
tokenApprovals[_tokenId] = 0;
Approval(_owner, 0, _tokenId);
}
/**
* @dev Internal function to add a token ID to the list of a given address
* @param _to address representing the new owner of the given token ID
* @param _tokenId uint256 ID of the token to be added to the tokens list of the given address
*/
function addToken(address _to, uint256 _tokenId) private {
require(tokenOwner[_tokenId] == address(0));
tokenOwner[_tokenId] = _to;
uint256 length = balanceOf(_to);
ownedTokens[_to].push(_tokenId);
ownedTokensIndex[_tokenId] = length;
totalTokens = totalTokens.add(1);
}
/**
* @dev Internal function to remove a token ID from the list of a given address
* @param _from address representing the previous owner of the given token ID
* @param _tokenId uint256 ID of the token to be removed from the tokens list of the given address
*/
function removeToken(address _from, uint256 _tokenId) private {
require(ownerOf(_tokenId) == _from);
uint256 tokenIndex = ownedTokensIndex[_tokenId];
uint256 lastTokenIndex = balanceOf(_from).sub(1);
uint256 lastToken = ownedTokens[_from][lastTokenIndex];
tokenOwner[_tokenId] = 0;
ownedTokens[_from][tokenIndex] = lastToken;
ownedTokens[_from][lastTokenIndex] = 0;
// Note that this will handle single-element arrays. In that case, both tokenIndex and lastTokenIndex are going to
// be zero. Then we can make sure that we will remove _tokenId from the ownedTokens list since we are first swapping
// the lastToken to the first position, and then dropping the element placed in the last position of the list
ownedTokens[_from].length--;
ownedTokensIndex[_tokenId] = 0;
ownedTokensIndex[lastToken] = tokenIndex;
totalTokens = totalTokens.sub(1);
}
}

10
contracts/token/ERC721/DeprecatedERC721.sol
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pragma solidity ^0.4.18;
import "./ERC721.sol";
contract DeprecatedERC721 is ERC721 {
function takeOwnership(uint256 _tokenId) public;
function transfer(address _to, uint256 _tokenId) public;
function tokensOf(address _owner) public view returns (uint256[]);
}

35
contracts/token/ERC721/DeprecatedERC721Token.sol
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pragma solidity ^0.4.18;
import "./DeprecatedERC721.sol";
import "./ERC721Token.sol";
contract DeprecatedERC721Token is DeprecatedERC721, ERC721Token {
/**
* @dev Claims the ownership of a given token ID
* @param _tokenId uint256 ID of the token being claimed by the msg.sender
*/
function takeOwnership(uint256 _tokenId) canTransfer(_tokenId) public {
require(msg.sender != ownerOf(_tokenId));
clearApprovalAndTransfer(ownerOf(_tokenId), msg.sender, _tokenId, "", false);
}
/**
* @dev Transfers the ownership of a given token ID to another address
* @param _to address to receive the ownership of the given token ID
* @param _tokenId uint256 ID of the token to be transferred
*/
function transfer(address _to, uint256 _tokenId) public {
address owner = ownerOf(_tokenId);
require(owner == msg.sender);
clearApprovalAndTransfer(owner, _to, _tokenId, "", false);
}
/**
* @dev Gets the list of tokens owned by a given address
* @param _owner address to query the tokens of
* @return uint256[] representing the list of tokens owned by the passed address
*/
function tokensOf(address _owner) public view returns (uint256[]) {
return ownedTokens[_owner];
}
}

23
contracts/token/ERC721/ERC721.sol
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pragma solidity ^0.4.18; pragma solidity ^0.4.18;
import "./BaseERC721.sol"; import "./ERC721Basic.sol";
contract ERC721Enumerable is ERC721Basic {
function totalSupply() public view returns (uint256);
function tokenOfOwnerByIndex(address _owner, uint256 _index) public view returns (uint256 _tokenId);
// function tokenByIndex(uint256 _index) public view returns (uint256);
}
/** contract ERC721Metadata is ERC721Basic {
* @title Full ERC721 interface
* @dev see https://github.com/ethereum/eips/issues/721 and https://github.com/ethereum/EIPs/pull/841
*/
contract ERC721 is BaseERC721 {
event OperatorApproval(address indexed _owner, address indexed _operator, bool _approved);
function name() public view returns (string _name); function name() public view returns (string _name);
function symbol() public view returns (string _symbol); function symbol() public view returns (string _symbol);
function takeOwnershipFor(address _to, uint256 _tokenId) public; function tokenURI(uint256 _tokenId) public view returns (string);
function setOperatorApproval(address _to, bool _approved) public; }
function isOperatorApprovedFor(address _owner, address _operator) public view returns (bool);
function tokenOfOwnerByIndex(address _owner, uint256 _index) public view returns (uint256 _tokenId); contract ERC721 is ERC721Basic, ERC721Enumerable, ERC721Metadata {
} }

25
contracts/token/ERC721/ERC721Basic.sol
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pragma solidity ^0.4.18;
/**
* @title Base ERC721 interface
* @dev see https://github.com/ethereum/eips/issues/721 and https://github.com/ethereum/EIPs/pull/841
*/
contract ERC721Basic {
event Transfer(address indexed _from, address indexed _to, uint256 _tokenId);
event Approval(address indexed _owner, address indexed _approved, uint256 _tokenId);
event ApprovalForAll(address indexed _owner, address indexed _operator, bool _approved);
function balanceOf(address _owner) public view returns (uint256 _balance);
function ownerOf(uint256 _tokenId) public view returns (address _owner);
function exists(uint256 _tokenId) public view returns (bool _exists);
function approve(address _to, uint256 _tokenId) public;
function getApproved(uint256 _tokenId) public view returns (address _operator);
function setApprovalForAll(address _operator, bool _approved) public;
function isApprovedForAll(address _owner, address _operator) public view returns (bool);
function transferFrom(address _from, address _to, uint256 _tokenId) public;
function safeTransferFrom(address _from, address _to, uint256 _tokenId) public;
function safeTransferFrom(address _from, address _to, uint256 _tokenId, bytes _data) public;
}

247
contracts/token/ERC721/ERC721BasicToken.sol
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pragma solidity ^0.4.18;
import "./ERC721Basic.sol";
import "./ERC721Receiver.sol";
import "../../math/SafeMath.sol";
import "../../AddressUtils.sol";
/**
* @title ERC721BasicToken
* Generic implementation for the required functionality of the ERC721 standard
*/
contract ERC721BasicToken is ERC721Basic {
using SafeMath for uint256;
using AddressUtils for address;
uint256 SAFE_TRANSFER_GAS_STIPEND = 50000;
// Equals to bytes4(keccak256("onERC721Received(address,uint256,bytes)"))
bytes4 ERC721_RECEIVED = 0xf0b9e5ba;
// Total amount of tokens
uint256 internal totalTokens;
// Mapping from token ID to owner
mapping (uint256 => address) internal tokenOwner;
// Mapping from token ID to approved address
mapping (uint256 => address) internal tokenApprovals;
// Mapping from owner to number of owned token
mapping (address => uint256) internal ownedTokensCount;
// Mapping from owner to operator approvals
mapping (address => mapping (address => bool)) internal operatorApprovals;
/**
* @dev Guarantees msg.sender is owner of the given token
* @param _tokenId uint256 ID of the token to validate its ownership belongs to msg.sender
*/
modifier onlyOwnerOf(uint256 _tokenId) {
require(ownerOf(_tokenId) == msg.sender);
_;
}
modifier canTransfer(uint256 _tokenId) {
require(isApprovedOrOwner(msg.sender, _tokenId));
_;
}
/**
* @dev Gets the balance of the specified address
* @param _owner address to query the balance of
* @return uint256 representing the amount owned by the passed address
*/
function balanceOf(address _owner) public view returns (uint256) {
return ownedTokensCount[_owner];
}
/**
* @dev Gets the owner of the specified token ID
* @param _tokenId uint256 ID of the token to query the owner of
* @return owner address currently marked as the owner of the given token ID
*/
function ownerOf(uint256 _tokenId) public view returns (address) {
address owner = tokenOwner[_tokenId];
require(owner != address(0));
return owner;
}
function exists(uint256 _tokenId) public view returns (bool) {
address owner = tokenOwner[_tokenId];
return owner != 0;
}
/**
* @dev Approves another address to claim for the ownership of the given token ID
* @param _to address to be approved for the given token ID
* @param _tokenId uint256 ID of the token to be approved
*/
function approve(address _to, uint256 _tokenId) public onlyOwnerOf(_tokenId) {
address owner = ownerOf(_tokenId);
require(_to != owner);
if (getApproved(_tokenId) != 0 || _to != 0) {
tokenApprovals[_tokenId] = _to;
Approval(owner, _to, _tokenId);
}
}
/**
* @dev Gets the approved address to take ownership of a given token ID
* @param _tokenId uint256 ID of the token to query the approval of
* @return address currently approved to take ownership of the given token ID
*/
function getApproved(uint256 _tokenId) public view returns (address) {
return tokenApprovals[_tokenId];
}
/**
* @dev Sets the approval of a given operator
* @param _to operator address to set the approval
* @param _approved representing the status of the approval to be set
*/
function setApprovalForAll(address _to, bool _approved) public {
require(_to != msg.sender);
operatorApprovals[msg.sender][_to] = _approved;
ApprovalForAll(msg.sender, _to, _approved);
}
/**
* @dev Tells whether an operator is approved by a given owner
* @param _owner owner address which you want to query the approval of
* @param _operator operator address which you want to query the approval of
* @return bool whether the given operator is approved by the given owner
*/
function isApprovedForAll(address _owner, address _operator) public view returns (bool) {
return operatorApprovals[_owner][_operator];
}
/**
* @dev Transfers the ownership of a given token ID to another address
* @param _from current owner of the token
* @param _to address to receive the ownership of the given token ID
* @param _tokenId uint256 ID of the token to be transferred
*/
function transferFrom(address _from, address _to, uint256 _tokenId) public canTransfer(_tokenId) {
clearApprovalAndTransfer(_from, _to, _tokenId, "", false);
}
/**
* @dev Transfers the ownership of a given token ID to another address
* @param _from current owner of the token
* @param _to address to receive the ownership of the given token ID
* @param _tokenId uint256 ID of the token to be transferred
*/
function safeTransferFrom(address _from, address _to, uint256 _tokenId) public canTransfer(_tokenId) {
clearApprovalAndTransfer(_from, _to, _tokenId, "", true);
}
/**
* @dev Transfers the ownership of a given token ID to another address
* @param _from current owner of the token
* @param _to address to receive the ownership of the given token ID
* @param _tokenId uint256 ID of the token to be transferred
* @param _data bytes data to send along with a safe transfer check
*/
function safeTransferFrom(address _from, address _to, uint256 _tokenId, bytes _data) public canTransfer(_tokenId) {
clearApprovalAndTransfer(_from, _to, _tokenId, _data, true);
}
/**
* @dev Tells whether the given spender can transfer a given token ID
* @param _spender address of the spender to query
* @param _tokenId uint256 ID of the token to be transferred
* @return bool whether the msg.sender is approved for the given token ID,
* is an operator of the owner, or is the owner of the token
*/
function isApprovedOrOwner(address _spender, uint256 _tokenId) internal view returns (bool) {
address owner = ownerOf(_tokenId);
return _spender == owner || getApproved(_tokenId) == _spender || isApprovedForAll(owner, _spender);
}
/**
* @dev Mint token function
* @param _to The address that will own the minted token
* @param _tokenId uint256 ID of the token to be minted by the msg.sender
*/
function doMint(address _to, uint256 _tokenId) internal {
require(_to != address(0));
addToken(_to, _tokenId);
totalTokens = totalTokens.add(1);
Transfer(0x0, _to, _tokenId);
}
/**
* @dev Burns a specific token
* @param _tokenId uint256 ID of the token being burned by the msg.sender
*/
function doBurn(uint256 _tokenId) onlyOwnerOf(_tokenId) internal {
if (getApproved(_tokenId) != 0) {
clearApproval(msg.sender, _tokenId);
}
removeToken(msg.sender, _tokenId);
totalTokens = totalTokens.sub(1);
Transfer(msg.sender, 0x0, _tokenId);
}
/**
* @dev Internal function to clear current approval and transfer the ownership of a given token ID
* @param _from address which you want to send tokens from
* @param _to address which you want to transfer the token to
* @param _tokenId uint256 ID of the token to be transferred
* @param _data bytes data to send along with a safe transfer check
* @param _safe bool whether to perform a safe transfer
*/
function clearApprovalAndTransfer(address _from, address _to, uint256 _tokenId, bytes _data, bool _safe) internal {
require(_from != address(0));
require(_to != address(0));
require(_to != ownerOf(_tokenId));
require(ownerOf(_tokenId) == _from);
clearApproval(_from, _tokenId);
removeToken(_from, _tokenId);
addToken(_to, _tokenId);
require(!_safe || checkSafeTransfer(_from, _to, _tokenId, _data));
Transfer(_from, _to, _tokenId);
}
/**
* @dev Internal function to clear current approval of a given token ID
* @param _tokenId uint256 ID of the token to be transferred
*/
function clearApproval(address _owner, uint256 _tokenId) internal {
require(ownerOf(_tokenId) == _owner);
tokenApprovals[_tokenId] = 0;
Approval(_owner, 0, _tokenId);
}
/**
* @dev Internal function to add a token ID to the list of a given address
* @param _to address representing the new owner of the given token ID
* @param _tokenId uint256 ID of the token to be added to the tokens list of the given address
*/
function addToken(address _to, uint256 _tokenId) internal {
require(tokenOwner[_tokenId] == address(0));
tokenOwner[_tokenId] = _to;
ownedTokensCount[_to] = ownedTokensCount[_to].add(1);
}
/**
* @dev Internal function to remove a token ID from the list of a given address
* @param _from address representing the previous owner of the given token ID
* @param _tokenId uint256 ID of the token to be removed from the tokens list of the given address
*/
function removeToken(address _from, uint256 _tokenId) internal {
require(ownerOf(_tokenId) == _from);
ownedTokensCount[_from] = ownedTokensCount[_from].sub(1);
tokenOwner[_tokenId] = 0;
}
function checkSafeTransfer(address _from, address _to, uint256 _tokenId, bytes _data) internal returns (bool) {
return !_to.isContract() ||
(ERC721Receiver(_to).onERC721Received.gas(SAFE_TRANSFER_GAS_STIPEND)(_from, _tokenId, _data) == ERC721_RECEIVED);
}
}

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contracts/token/ERC721/ERC721Holder.sol
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pragma solidity ^0.4.18;
import "./ERC721Receiver.sol";
contract ERC721Holder is ERC721Receiver {
function onERC721Received(address, uint256, bytes) public returns(bytes4) {
return ERC721_RECEIVED;
}
}

19
contracts/token/ERC721/ERC721Receiver.sol
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@ -0,0 +1,19 @@
pragma solidity ^0.4.18;
contract ERC721Receiver {
/// @dev Magic value to be returned upon successful reception of an NFT
/// Equals to bytes4(keccak256("onERC721Received(address,uint256,bytes)"))
bytes4 ERC721_RECEIVED = 0xf0b9e5ba;
/// @notice Handle the receipt of an NFT
/// @dev The ERC721 smart contract calls this function on the recipient
/// after a `safetransfer`. This function MAY throw to revert and reject the
/// transfer. This function MUST use 50,000 gas or less. Return of other
/// than the magic value MUST result in the transaction being reverted.
/// Note: the contract address is always the message sender.
/// @param _from The sending address
/// @param _tokenId The NFT identifier which is being transfered
/// @param _data Additional data with no specified format
/// @return `bytes4(keccak256("onERC721Received(address,uint256,bytes)"))`
function onERC721Received(address _from, uint256 _tokenId, bytes _data) public returns(bytes4);
}

101
contracts/token/ERC721/ERC721Token.sol
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@ -1,7 +1,8 @@
pragma solidity ^0.4.18; pragma solidity ^0.4.18;
import "./ERC721.sol"; import "./ERC721.sol";
import "./BaseERC721Token.sol"; import "./DeprecatedERC721.sol";
import "./ERC721BasicToken.sol";
/** /**
@ -10,22 +11,34 @@ import "./BaseERC721Token.sol";
* Moreover, it includes approve all functionality using operatable terminology * Moreover, it includes approve all functionality using operatable terminology
* @dev see https://github.com/ethereum/eips/issues/721 and https://github.com/ethereum/EIPs/pull/841 * @dev see https://github.com/ethereum/eips/issues/721 and https://github.com/ethereum/EIPs/pull/841
*/ */
contract ERC721Token is ERC721, BaseERC721Token { contract ERC721Token is ERC721, ERC721BasicToken {
// Token name // Token name
string private _name; string internal name_;
// Token symbol // Token symbol
string private _symbol; string internal symbol_;
// Mapping from owner to operator approvals // Mapping from owner to list of owned token IDs
mapping (address => mapping (address => bool)) private operatorApprovals; mapping (address => uint256[]) internal ownedTokens;
// Mapping from token ID to index of the owner tokens list
mapping(uint256 => uint256) internal ownedTokensIndex;
/** /**
* @dev Constructor function * @dev Constructor function
*/ */
function ERC721Token(string name, string symbol) public { function ERC721Token(string _name, string _symbol) public {
_name = name; name_ = _name;
_symbol = symbol; symbol_ = _symbol;
}
/**
* @dev Gets the balance of the specified address
* @param _owner address to query the balance of
* @return uint256 representing the amount owned by the passed address
*/
function balanceOf(address _owner) public view returns (uint256) {
return ownedTokens[_owner].length;
} }
/** /**
@ -33,7 +46,7 @@ contract ERC721Token is ERC721, BaseERC721Token {
* @return string representing the token name * @return string representing the token name
*/ */
function name() public view returns (string) { function name() public view returns (string) {
return _name; return name_;
} }
/** /**
@ -41,7 +54,7 @@ contract ERC721Token is ERC721, BaseERC721Token {
* @return string representing the token symbol * @return string representing the token symbol
*/ */
function symbol() public view returns (string) { function symbol() public view returns (string) {
return _symbol; return symbol_;
} }
/** /**
@ -52,48 +65,52 @@ contract ERC721Token is ERC721, BaseERC721Token {
*/ */
function tokenOfOwnerByIndex(address _owner, uint256 _index) public view returns (uint256) { function tokenOfOwnerByIndex(address _owner, uint256 _index) public view returns (uint256) {
require(_index < balanceOf(_owner)); require(_index < balanceOf(_owner));
return tokensOf(_owner)[_index]; return ownedTokens[_owner][_index];
} }
/** /**
* @dev Claims the ownership of a given token ID for a given recipient * @dev Gets the total amount of tokens stored by the contract
* @param _to address which you want to transfer the token to * @return uint256 representing the total amount of tokens
* @param _tokenId uint256 ID of the token being claimed by the msg.sender
*/ */
function takeOwnershipFor(address _to, uint256 _tokenId) public { function totalSupply() public view returns (uint256) {
require(isApprovedFor(msg.sender, _tokenId)); return totalTokens;
clearApprovalAndTransfer(ownerOf(_tokenId), _to, _tokenId);
} }
/** /**
* @dev Sets the approval of a given operator * @dev Internal function to add a token ID to the list of a given address
* @param _to operator address to set the approval * @param _to address representing the new owner of the given token ID
* @param _approved representing the status of the approval to be set * @param _tokenId uint256 ID of the token to be added to the tokens list of the given address
*/ */
function setOperatorApproval(address _to, bool _approved) public { function addToken(address _to, uint256 _tokenId) internal {
require(_to != msg.sender); require(tokenOwner[_tokenId] == address(0));
operatorApprovals[msg.sender][_to] = _approved; tokenOwner[_tokenId] = _to;
OperatorApproval(msg.sender, _to, _approved); uint256 length = balanceOf(_to);
ownedTokens[_to].push(_tokenId);
ownedTokensIndex[_tokenId] = length;
} }
/** /**
* @dev Tells whether an operator is approved by a given owner * @dev Internal function to remove a token ID from the list of a given address
* @param _owner owner address which you want to query the approval of * @param _from address representing the previous owner of the given token ID
* @param _operator operator address which you want to query the approval of * @param _tokenId uint256 ID of the token to be removed from the tokens list of the given address
* @return bool whether the given operator is approved by the given owner */
*/ function removeToken(address _from, uint256 _tokenId) internal {
function isOperatorApprovedFor(address _owner, address _operator) public view returns (bool) { require(ownerOf(_tokenId) == _from);
return operatorApprovals[_owner][_operator];
}
/** uint256 tokenIndex = ownedTokensIndex[_tokenId];
* @dev Tells whether the given spender is approved for the given token ID or uint256 lastTokenIndex = balanceOf(_from).sub(1);
* if the given owner is an operator approved by the owner of the token uint256 lastToken = ownedTokens[_from][lastTokenIndex];
* @param _spender address of the spender to query the approval of
* @param _tokenId uint256 ID of the token to query the approval of tokenOwner[_tokenId] = 0;
* @return bool whether the msg.sender is approved for the given token ID or not ownedTokens[_from][tokenIndex] = lastToken;
*/ ownedTokens[_from][lastTokenIndex] = 0;
function isApprovedFor(address _spender, uint256 _tokenId) internal view returns (bool) { // Note that this will handle single-element arrays. In that case, both tokenIndex and lastTokenIndex are going to
return super.isApprovedFor(_spender, _tokenId) || isOperatorApprovedFor(ownerOf(_tokenId), _spender); // be zero. Then we can make sure that we will remove _tokenId from the ownedTokens list since we are first swapping
// the lastToken to the first position, and then dropping the element placed in the last position of the list
ownedTokens[_from].length--;
ownedTokensIndex[_tokenId] = 0;
ownedTokensIndex[lastToken] = tokenIndex;
} }
} }

534
test/token/ERC721/BaseERC721Token.test.js
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@ -1,534 +0,0 @@
import assertRevert from '../../helpers/assertRevert';
const BigNumber = web3.BigNumber;
const BaseERC721Token = artifacts.require('BaseERC721TokenMock.sol');
require('chai')
.use(require('chai-as-promised'))
.use(require('chai-bignumber')(BigNumber))
.should();
contract('BaseERC721Token', accounts => {
let token = null;
const _firstTokenId = 1;
const _secondTokenId = 2;
const _unknownTokenId = 3;
const _creator = accounts[0];
const ZERO_ADDRESS = '0x0000000000000000000000000000000000000000';
beforeEach(async function () {
token = await BaseERC721Token.new({ from: _creator });
await token.mint(_creator, _firstTokenId, { from: _creator });
await token.mint(_creator, _secondTokenId, { from: _creator });
});
describe('totalSupply', function () {
it('has a total supply equivalent to the inital supply', async function () {
const totalSupply = await token.totalSupply();
totalSupply.should.be.bignumber.equal(2);
});
});
describe('balanceOf', function () {
describe('when the given address owns some tokens', function () {
it('returns the amount of tokens owned by the given address', async function () {
const balance = await token.balanceOf(_creator);
balance.should.be.bignumber.equal(2);
});
});
describe('when the given address does not own any tokens', function () {
it('returns 0', async function () {
const balance = await token.balanceOf(accounts[1]);
balance.should.be.bignumber.equal(0);
});
});
});
describe('ownerOf', function () {
describe('when the given token ID was tracked by this token', function () {
const tokenId = _firstTokenId;
it('returns the owner of the given token ID', async function () {
const owner = await token.ownerOf(tokenId);
owner.should.be.equal(_creator);
});
});
describe('when the given token ID was not tracked by this token', function () {
const tokenId = _unknownTokenId;
it('reverts', async function () {
await assertRevert(token.ownerOf(tokenId));
});
});
});
describe('mint', function () {
describe('when the given token ID was not tracked by this contract', function () {
const tokenId = _unknownTokenId;
describe('when the given address is not the zero address', function () {
const to = accounts[1];
it('mints the given token ID to the given address', async function () {
const previousBalance = await token.balanceOf(to);
await token.mint(to, tokenId);
const owner = await token.ownerOf(tokenId);
owner.should.be.equal(to);
const balance = await token.balanceOf(to);
balance.should.be.bignumber.equal(previousBalance + 1);
});
it('adds that token to the token list of the owner', async function () {
await token.mint(to, tokenId);
const tokens = await token.tokensOf(to);
tokens.length.should.be.equal(1);
tokens[0].should.be.bignumber.equal(tokenId);
});
it('emits a transfer event', async function () {
const { logs } = await token.mint(to, tokenId);
logs.length.should.be.equal(1);
logs[0].event.should.be.eq('Transfer');
logs[0].args._from.should.be.equal(ZERO_ADDRESS);
logs[0].args._to.should.be.equal(to);
logs[0].args._tokenId.should.be.bignumber.equal(tokenId);
});
});
describe('when the given address is the zero address', function () {
const to = ZERO_ADDRESS;
it('reverts', async function () {
await assertRevert(token.mint(to, tokenId));
});
});
});
describe('when the given token ID was already tracked by this contract', function () {
const tokenId = _firstTokenId;
it('reverts', async function () {
await assertRevert(token.mint(accounts[1], tokenId));
});
});
});
describe('burn', function () {
describe('when the given token ID was tracked by this contract', function () {
const tokenId = _firstTokenId;
describe('when the msg.sender owns given token', function () {
const sender = _creator;
it('burns the given token ID and adjusts the balance of the owner', async function () {
const previousBalance = await token.balanceOf(sender);
await token.burn(tokenId, { from: sender });
await assertRevert(token.ownerOf(tokenId));
const balance = await token.balanceOf(sender);
balance.should.be.bignumber.equal(previousBalance - 1);
});
it('removes that token from the token list of the owner', async function () {
await token.burn(tokenId, { from: sender });
const tokens = await token.tokensOf(sender);
tokens.length.should.be.equal(1);
tokens[0].should.be.bignumber.equal(_secondTokenId);
});
it('emits a burn event', async function () {
const { logs } = await token.burn(tokenId, { from: sender });
logs.length.should.be.equal(1);
logs[0].event.should.be.eq('Transfer');
logs[0].args._from.should.be.equal(sender);
logs[0].args._to.should.be.equal(ZERO_ADDRESS);
logs[0].args._tokenId.should.be.bignumber.equal(tokenId);
});
describe('when there is an approval for the given token ID', function () {
beforeEach(async function () {
await token.approve(accounts[1], tokenId, { from: sender });
});
it('clears the approval', async function () {
await token.burn(tokenId, { from: sender });
const approvedAccount = await token.approvedFor(tokenId);
approvedAccount.should.be.equal(ZERO_ADDRESS);
});
it('emits an approval event', async function () {
const { logs } = await token.burn(tokenId, { from: sender });
logs.length.should.be.equal(2);
logs[0].event.should.be.eq('Approval');
logs[0].args._owner.should.be.equal(sender);
logs[0].args._approved.should.be.equal(ZERO_ADDRESS);
logs[0].args._tokenId.should.be.bignumber.equal(tokenId);
});
});
});
describe('when the msg.sender does not own given token', function () {
const sender = accounts[1];
it('reverts', async function () {
await assertRevert(token.burn(tokenId, { from: sender }));
});
});
});
describe('when the given token ID was not tracked by this contract', function () {
const tokenID = _unknownTokenId;
it('reverts', async function () {
await assertRevert(token.burn(tokenID, { from: _creator }));
});
});
});
describe('transfer', function () {
describe('when the address to transfer the token to is not the zero address', function () {
const to = accounts[1];
describe('when the given token ID was tracked by this token', function () {
const tokenId = _firstTokenId;
describe('when the msg.sender is the owner of the given token ID', function () {
const sender = _creator;
it('transfers the ownership of the given token ID to the given address', async function () {
await token.transfer(to, tokenId, { from: sender });
const newOwner = await token.ownerOf(tokenId);
newOwner.should.be.equal(to);
});
it('clears the approval for the token ID', async function () {
await token.approve(accounts[2], tokenId, { from: sender });
await token.transfer(to, tokenId, { from: sender });
const approvedAccount = await token.approvedFor(tokenId);
approvedAccount.should.be.equal(ZERO_ADDRESS);
});
it('emits an approval and transfer events', async function () {
const { logs } = await token.transfer(to, tokenId, { from: sender });
logs.length.should.be.equal(2);
logs[0].event.should.be.eq('Approval');
logs[0].args._owner.should.be.equal(sender);
logs[0].args._approved.should.be.equal(ZERO_ADDRESS);
logs[0].args._tokenId.should.be.bignumber.equal(tokenId);
logs[1].event.should.be.eq('Transfer');
logs[1].args._from.should.be.equal(sender);
logs[1].args._to.should.be.equal(to);
logs[1].args._tokenId.should.be.bignumber.equal(tokenId);
});
it('adjusts owners balances', async function () {
const previousBalance = await token.balanceOf(sender);
await token.transfer(to, tokenId, { from: sender });
const newOwnerBalance = await token.balanceOf(to);
newOwnerBalance.should.be.bignumber.equal(1);
const previousOwnerBalance = await token.balanceOf(_creator);
previousOwnerBalance.should.be.bignumber.equal(previousBalance - 1);
});
it('adds the token to the tokens list of the new owner', async function () {
await token.transfer(to, tokenId, { from: sender });
const tokenIDs = await token.tokensOf(to);
tokenIDs.length.should.be.equal(1);
tokenIDs[0].should.be.bignumber.equal(tokenId);
});
});
describe('when the msg.sender is not the owner of the given token ID', function () {
const sender = accounts[2];
it('reverts', async function () {
await assertRevert(token.transfer(to, tokenId, { from: sender }));
});
});
});
describe('when the given token ID was not tracked by this token', function () {
let tokenId = _unknownTokenId;
it('reverts', async function () {
await assertRevert(token.transfer(to, tokenId, { from: _creator }));
});
});
});
describe('when the address to transfer the token to is the zero address', function () {
const to = ZERO_ADDRESS;
it('reverts', async function () {
await assertRevert(token.transfer(to, 0, { from: _creator }));
});
});
});
describe('approve', function () {
describe('when the given token ID was already tracked by this contract', function () {
const tokenId = _firstTokenId;
describe('when the sender owns the given token ID', function () {
const sender = _creator;
describe('when the address that receives the approval is the 0 address', function () {
const to = ZERO_ADDRESS;
describe('when there was no approval for the given token ID before', function () {
it('clears the approval for that token', async function () {
await token.approve(to, tokenId, { from: sender });
const approvedAccount = await token.approvedFor(tokenId);
approvedAccount.should.be.equal(to);
});
it('does not emit an approval event', async function () {
const { logs } = await token.approve(to, tokenId, { from: sender });
logs.length.should.be.equal(0);
});
});
describe('when the given token ID was approved for another account', function () {
beforeEach(async function () {
await token.approve(accounts[2], tokenId, { from: sender });
});
it('clears the approval for the token ID', async function () {
await token.approve(to, tokenId, { from: sender });
const approvedAccount = await token.approvedFor(tokenId);
approvedAccount.should.be.equal(to);
});
it('emits an approval event', async function () {
const { logs } = await token.approve(to, tokenId, { from: sender });
logs.length.should.be.equal(1);
logs[0].event.should.be.eq('Approval');
logs[0].args._owner.should.be.equal(sender);
logs[0].args._approved.should.be.equal(to);
logs[0].args._tokenId.should.be.bignumber.equal(tokenId);
});
});
});
describe('when the address that receives the approval is not the 0 address', function () {
describe('when the address that receives the approval is different than the owner', function () {
const to = accounts[1];
describe('when there was no approval for the given token ID before', function () {
it('approves the token ID to the given address', async function () {
await token.approve(to, tokenId, { from: sender });
const approvedAccount = await token.approvedFor(tokenId);
approvedAccount.should.be.equal(to);
});
it('emits an approval event', async function () {
const { logs } = await token.approve(to, tokenId, { from: sender });
logs.length.should.be.equal(1);
logs[0].event.should.be.eq('Approval');
logs[0].args._owner.should.be.equal(sender);
logs[0].args._approved.should.be.equal(to);
logs[0].args._tokenId.should.be.bignumber.equal(tokenId);
});
});
describe('when the given token ID was approved for the same account', function () {
beforeEach(async function () {
await token.approve(to, tokenId, { from: sender });
});
it('keeps the approval to the given address', async function () {
await token.approve(to, tokenId, { from: sender });
const approvedAccount = await token.approvedFor(tokenId);
approvedAccount.should.be.equal(to);
});
it('emits an approval event', async function () {
const { logs } = await token.approve(to, tokenId, { from: sender });
logs.length.should.be.equal(1);
logs[0].event.should.be.eq('Approval');
logs[0].args._owner.should.be.equal(sender);
logs[0].args._approved.should.be.equal(to);
logs[0].args._tokenId.should.be.bignumber.equal(tokenId);
});
});
describe('when the given token ID was approved for another account', function () {
beforeEach(async function () {
await token.approve(accounts[2], tokenId, { from: sender });
});
it('changes the approval to the given address', async function () {
await token.approve(to, tokenId, { from: sender });
const approvedAccount = await token.approvedFor(tokenId);
approvedAccount.should.be.equal(to);
});
it('emits an approval event', async function () {
const { logs } = await token.approve(to, tokenId, { from: sender });
logs.length.should.be.equal(1);
logs[0].event.should.be.eq('Approval');
logs[0].args._owner.should.be.equal(sender);
logs[0].args._approved.should.be.equal(to);
logs[0].args._tokenId.should.be.bignumber.equal(tokenId);
});
});
});
describe('when the address that receives the approval is the owner', function () {
const to = _creator;
describe('when there was no approval for the given token ID before', function () {
it('reverts', async function () {
await assertRevert(token.approve(to, tokenId, { from: sender }));
});
});
describe('when the given token ID was approved for another account', function () {
beforeEach(async function () {
await token.approve(accounts[2], tokenId, { from: sender });
});
it('reverts', async function () {
await assertRevert(token.approve(to, tokenId, { from: sender }));
});
});
});
});
});
describe('when the sender does not own the given token ID', function () {
const sender = accounts[1];
it('reverts', async function () {
await assertRevert(token.approve(accounts[2], tokenId, { from: sender }));
});
});
});
describe('when the given token ID was not tracked by the contract before', function () {
const tokenId = _unknownTokenId;
it('reverts', async function () {
await assertRevert(token.approve(accounts[1], tokenId, { from: _creator }));
});
});
});
describe('takeOwnership', function () {
describe('when the given token ID was already tracked by this contract', function () {
const tokenId = _firstTokenId;
describe('when the sender has the approval for the token ID', function () {
const sender = accounts[1];
beforeEach(async function () {
await token.approve(sender, tokenId, { from: _creator });
});
it('transfers the ownership of the given token ID to the given address', async function () {
await token.takeOwnership(tokenId, { from: sender });
const newOwner = await token.ownerOf(tokenId);
newOwner.should.be.equal(sender);
});
it('clears the approval for the token ID', async function () {
await token.takeOwnership(tokenId, { from: sender });
const approvedAccount = await token.approvedFor(tokenId);
approvedAccount.should.be.equal(ZERO_ADDRESS);
});
it('emits an approval and transfer events', async function () {
const { logs } = await token.takeOwnership(tokenId, { from: sender });
logs.length.should.be.equal(2);
logs[0].event.should.be.eq('Approval');
logs[0].args._owner.should.be.equal(_creator);
logs[0].args._approved.should.be.equal(ZERO_ADDRESS);
logs[0].args._tokenId.should.be.bignumber.equal(tokenId);
logs[1].event.should.be.eq('Transfer');
logs[1].args._from.should.be.equal(_creator);
logs[1].args._to.should.be.equal(sender);
logs[1].args._tokenId.should.be.bignumber.equal(tokenId);
});
it('adjusts owners balances', async function () {
const previousBalance = await token.balanceOf(_creator);
await token.takeOwnership(tokenId, { from: sender });
const newOwnerBalance = await token.balanceOf(sender);
newOwnerBalance.should.be.bignumber.equal(1);
const previousOwnerBalance = await token.balanceOf(_creator);
previousOwnerBalance.should.be.bignumber.equal(previousBalance - 1);
});
it('adds the token to the tokens list of the new owner', async function () {
await token.takeOwnership(tokenId, { from: sender });
const tokenIDs = await token.tokensOf(sender);
tokenIDs.length.should.be.equal(1);
tokenIDs[0].should.be.bignumber.equal(tokenId);
});
});
describe('when the sender does not have an approval for the token ID', function () {
const sender = accounts[1];
it('reverts', async function () {
await assertRevert(token.takeOwnership(tokenId, { from: sender }));
});
});
describe('when the sender is already the owner of the token', function () {
const sender = _creator;
it('reverts', async function () {
await assertRevert(token.takeOwnership(tokenId, { from: sender }));
});
});
});
describe('when the given token ID was not tracked by the contract before', function () {
const tokenId = _unknownTokenId;
it('reverts', async function () {
await assertRevert(token.takeOwnership(tokenId, { from: _creator }));
});
});
});
});

498
test/token/ERC721/ERC721BasicToken.test.js
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@ -0,0 +1,498 @@
import assertRevert from '../../helpers/assertRevert';
const BigNumber = web3.BigNumber;
const ERC721BasicToken = artifacts.require('ERC721BasicTokenMock.sol');
require('chai')
.use(require('chai-as-promised'))
.use(require('chai-bignumber')(BigNumber))
.should();
contract('ERC721BasicToken', accounts => {
let token = null;
const _firstTokenId = 1;
const _secondTokenId = 2;
const _unknownTokenId = 3;
const _creator = accounts[0];
const ZERO_ADDRESS = '0x0000000000000000000000000000000000000000';
beforeEach(async function () {
token = await ERC721BasicToken.new({ from: _creator });
await token.mint(_creator, _firstTokenId, { from: _creator });
await token.mint(_creator, _secondTokenId, { from: _creator });
});
describe('balanceOf', function () {
describe('when the given address owns some tokens', function () {
it('returns the amount of tokens owned by the given address', async function () {
const balance = await token.balanceOf(_creator);
balance.should.be.bignumber.equal(2);
});
});
describe('when the given address does not own any tokens', function () {
it('returns 0', async function () {
const balance = await token.balanceOf(accounts[1]);
balance.should.be.bignumber.equal(0);
});
});
});
describe('exists', function () {
describe('when the token exists', function () {
const tokenId = _firstTokenId;
it('should return true', async function () {
const result = await token.exists(tokenId);
result.should.be.true;
});
});
describe('when the token does not exist', function () {
const tokenId = _unknownTokenId;
it('should return false', async function () {
const result = await token.exists(tokenId);
result.should.be.false;
});
});
});
describe('ownerOf', function () {
describe('when the given token ID was tracked by this token', function () {
const tokenId = _firstTokenId;
it('returns the owner of the given token ID', async function () {
const owner = await token.ownerOf(tokenId);
owner.should.be.equal(_creator);
});
});
describe('when the given token ID was not tracked by this token', function () {
const tokenId = _unknownTokenId;
it('reverts', async function () {
await assertRevert(token.ownerOf(tokenId));
});
});
});
describe('mint', function () {
const to = accounts[1];
const tokenId = _unknownTokenId;
let logs = null;
describe('when successful', function () {
beforeEach(async function () {
const result = await token.mint(to, tokenId);
logs = result.logs;
});
it('assigns the token to the new owner', async function () {
const owner = await token.ownerOf(tokenId);
owner.should.be.equal(to);
});
it('increases the balance of its owner', async function () {
const balance = await token.balanceOf(to);
balance.should.be.bignumber.equal(1);
});
it.skip('adds that token to the token list of the owner', async function () {
await token.mint(to, tokenId);
const tokens = await token.tokensOf(to);
tokens.length.should.be.equal(1);
tokens[0].should.be.bignumber.equal(tokenId);
});
it('emits a transfer event', async function () {
logs.length.should.be.equal(1);
logs[0].event.should.be.eq('Transfer');
logs[0].args._from.should.be.equal(ZERO_ADDRESS);
logs[0].args._to.should.be.equal(to);
logs[0].args._tokenId.should.be.bignumber.equal(tokenId);
});
});
describe('when the given owner address is the zero address', function () {
it('reverts', async function () {
await assertRevert(token.mint(ZERO_ADDRESS, tokenId));
});
});
describe('when the given token ID was already tracked by this contract', function () {
it('reverts', async function () {
await assertRevert(token.mint(accounts[1], _firstTokenId));
});
});
});
describe('burn', function () {
const tokenId = _firstTokenId;
const sender = _creator;
let logs = null;
describe('when successful', function () {
beforeEach(async function () {
const result = await token.burn(tokenId, { from: sender });
logs = result.logs;
});
it('burns the given token ID and adjusts the balance of the owner', async function () {
await assertRevert(token.ownerOf(tokenId));
const balance = await token.balanceOf(sender);
balance.should.be.bignumber.equal(1);
});
it.skip('removes that token from the token list of the owner', async function () {
const tokens = await token.tokensOf(sender);
tokens.length.should.be.equal(1);
tokens[0].should.be.bignumber.equal(_secondTokenId);
});
it('emits a burn event', async function () {
logs.length.should.be.equal(1);
logs[0].event.should.be.eq('Transfer');
logs[0].args._from.should.be.equal(sender);
logs[0].args._to.should.be.equal(ZERO_ADDRESS);
logs[0].args._tokenId.should.be.bignumber.equal(tokenId);
});
});
describe('when there is a previous approval', function () {
beforeEach(async function () {
await token.approve(accounts[1], tokenId, { from: sender });
const result = await token.burn(tokenId, { from: sender });
logs = result.logs;
});
it('clears the approval', async function () {
const approvedAccount = await token.getApproved(tokenId);
approvedAccount.should.be.equal(ZERO_ADDRESS);
});
it('emits an approval event', async function () {
logs.length.should.be.equal(2);
logs[0].event.should.be.eq('Approval');
logs[0].args._owner.should.be.equal(sender);
logs[0].args._approved.should.be.equal(ZERO_ADDRESS);
logs[0].args._tokenId.should.be.bignumber.equal(tokenId);
logs[1].event.should.be.eq('Transfer');
});
});
describe('when the msg.sender does not own given token', function () {
it('reverts', async function () {
await assertRevert(token.burn(tokenId, { from: accounts[1] }));
});
});
describe('when the given token ID was not tracked by this contract', function () {
it('reverts', async function () {
await assertRevert(token.burn(_unknownTokenId, { from: _creator }));
});
});
});
describe('transferFrom', function () {
const sender = _creator;
const from = _creator;
const to = accounts[1];
const tokenId = _firstTokenId;
const approved = accounts[2];
let logs = null;
describe('when successful', function () {
beforeEach(async function () {
await token.approve(approved, tokenId, { from: sender });
const result = await token.transferFrom(from, to, tokenId, { from: sender });
logs = result.logs;
});
it('transfers the ownership of the given token ID to the given address', async function () {
const newOwner = await token.ownerOf(tokenId);
newOwner.should.be.equal(to);
});
it('clears the approval for the token ID', async function () {
const approvedAccount = await token.getApproved(tokenId);
approvedAccount.should.be.equal(ZERO_ADDRESS);
});
it('emits an approval and transfer events', async function () {
logs.length.should.be.equal(2);
logs[0].event.should.be.eq('Approval');
logs[0].args._owner.should.be.equal(sender);
logs[0].args._approved.should.be.equal(ZERO_ADDRESS);
logs[0].args._tokenId.should.be.bignumber.equal(tokenId);
logs[1].event.should.be.eq('Transfer');
logs[1].args._from.should.be.equal(sender);
logs[1].args._to.should.be.equal(to);
logs[1].args._tokenId.should.be.bignumber.equal(tokenId);
});
it('adjusts owners balances', async function () {
const newOwnerBalance = await token.balanceOf(to);
newOwnerBalance.should.be.bignumber.equal(1);
const previousOwnerBalance = await token.balanceOf(_creator);
previousOwnerBalance.should.be.bignumber.equal(1);
});
it.skip('adds the token to the tokens list of the new owner', async function () {
await token.transfer(to, tokenId, { from: sender });
const tokenIDs = await token.tokensOf(to);
tokenIDs.length.should.be.equal(1);
tokenIDs[0].should.be.bignumber.equal(tokenId);
});
});
describe('when the address of the previous owner is incorrect', function () {
it('reverts', async function () {
await assertRevert(token.transferFrom(accounts[3], to, tokenId, { from: sender }));
});
});
describe('when the msg.sender is not the owner of the given token ID', function () {
it('reverts', async function () {
await assertRevert(token.transferFrom(from, to, tokenId, { from: accounts[2] }));
});
});
describe('when the given token ID does not exist', function () {
it('reverts', async function () {
await assertRevert(token.transferFrom(from, to, _unknownTokenId, { from: sender }));
});
});
describe('when the address to transfer the token to is the zero address', function () {
it('reverts', async function () {
await assertRevert(token.transferFrom(from, to, _unknownTokenId, { from: sender }));
});
});
});
describe('approve', function () {
const tokenId = _firstTokenId;
const sender = _creator;
const to = accounts[1];
let logs = null;
describe('when clearing approval', function () {
describe('when there was no prior approval', function () {
beforeEach(async function () {
({ logs } = await token.approve(ZERO_ADDRESS, tokenId, { from: sender }));
});
it('clears the approval for that token', async function () {
const approvedAccount = await token.getApproved(tokenId);
approvedAccount.should.be.equal(ZERO_ADDRESS);
});
it('does not emit an approval event', async function () {
logs.length.should.be.equal(0);
});
});
describe('when there was a prior approval', function () {
beforeEach(async function () {
await token.approve(to, tokenId, { from: sender });
({ logs } = await token.approve(ZERO_ADDRESS, tokenId, { from: sender }));
});
it('clears the approval for that token', async function () {
const approvedAccount = await token.getApproved(tokenId);
approvedAccount.should.be.equal(ZERO_ADDRESS);
});
it('emits an approval event', async function () {
logs.length.should.be.equal(1);
logs[0].event.should.be.eq('Approval');
logs[0].args._owner.should.be.equal(sender);
logs[0].args._approved.should.be.equal(ZERO_ADDRESS);
logs[0].args._tokenId.should.be.bignumber.equal(tokenId);
});
});
});
describe('when approving a non-zero address', function () {
describe('when there was no prior approval', function () {
beforeEach(async function () {
({ logs } = await token.approve(to, tokenId, { from: sender }));
});
it('sets the approval for that token', async function () {
const approvedAccount = await token.getApproved(tokenId);
approvedAccount.should.be.equal(to);
});
it('emits an approval event', async function () {
logs.length.should.be.equal(1);
logs[0].event.should.be.eq('Approval');
logs[0].args._owner.should.be.equal(sender);
logs[0].args._approved.should.be.equal(to);
logs[0].args._tokenId.should.be.bignumber.equal(tokenId);
});
});
describe('when there was a prior approval to the same address', function () {
beforeEach(async function () {
await token.approve(to, tokenId, { from: sender });
({ logs } = await token.approve(to, tokenId, { from: sender }));
});
it('keeps the approval for that token', async function () {
const approvedAccount = await token.getApproved(tokenId);
approvedAccount.should.be.equal(to);
});
it('emits an approval event', async function () {
logs.length.should.be.equal(1);
logs[0].event.should.be.eq('Approval');
logs[0].args._owner.should.be.equal(sender);
logs[0].args._approved.should.be.equal(to);
logs[0].args._tokenId.should.be.bignumber.equal(tokenId);
});
});
describe('when there was a prior approval to a different address', function () {
beforeEach(async function () {
await token.approve(accounts[2], tokenId, { from: sender });
({ logs } = await token.approve(to, tokenId, { from: sender }));
});
it('sets the approval for that token', async function () {
const approvedAccount = await token.getApproved(tokenId);
approvedAccount.should.be.equal(to);
});
it('emits an approval event', async function () {
logs.length.should.be.equal(1);
logs[0].event.should.be.eq('Approval');
logs[0].args._owner.should.be.equal(sender);
logs[0].args._approved.should.be.equal(to);
logs[0].args._tokenId.should.be.bignumber.equal(tokenId);
});
});
});
describe('when the address that receives the approval is the owner', function () {
it('reverts', async function () {
await assertRevert(token.approve(sender, tokenId, { from: sender }));
});
});
describe('when the sender does not own the given token ID', function () {
it('reverts', async function () {
await assertRevert(token.approve(to, tokenId, { from: accounts[2] }));
});
});
describe('when the sender is approved for the given token ID', function () {
it('reverts', async function () {
await token.approve(accounts[2], tokenId, { from: sender });
await assertRevert(token.approve(to, tokenId, { from: accounts[2] }));
});
});
describe('when the given token ID does not exist', function () {
it('reverts', async function () {
await assertRevert(token.approve(to, _unknownTokenId, { from: sender }));
});
});
});
describe('setApprovalForAll', function () {
const sender = _creator;
describe('when the operator willing to approve is not the owner', function () {
const operator = accounts[1];
describe('when there is no operator approval set by the sender', function () {
it('approves the operator', async function () {
await token.setApprovalForAll(operator, true, { from: sender });
const isApproved = await token.isApprovedForAll(sender, operator);
isApproved.should.be.true;
});
it('emits an approval event', async function () {
const { logs } = await token.setApprovalForAll(operator, true, { from: sender });
logs.length.should.be.equal(1);
logs[0].event.should.be.eq('ApprovalForAll');
logs[0].args._owner.should.be.equal(sender);
logs[0].args._operator.should.be.equal(operator);
logs[0].args._approved.should.be.true;
});
});
describe('when the operator was set as not approved', function () {
beforeEach(async function () {
await token.setApprovalForAll(operator, false, { from: sender });
});
it('approves the operator', async function () {
await token.setApprovalForAll(operator, true, { from: sender });
const isApproved = await token.isApprovedForAll(sender, operator);
isApproved.should.be.true;
});
it('emits an approval event', async function () {
const { logs } = await token.setApprovalForAll(operator, true, { from: sender });
logs.length.should.be.equal(1);
logs[0].event.should.be.eq('ApprovalForAll');
logs[0].args._owner.should.be.equal(sender);
logs[0].args._operator.should.be.equal(operator);
logs[0].args._approved.should.be.true;
});
it('can unset the operator approval', async function () {
await token.setApprovalForAll(operator, false, { from: sender });
const isApproved = await token.isApprovedForAll(sender, operator);
isApproved.should.be.false;
});
});
describe('when the operator was already approved', function () {
beforeEach(async function () {
await token.setApprovalForAll(operator, true, { from: sender });
});
it('keeps the approval to the given address and does not emit an approval event', async function () {
await token.setApprovalForAll(operator, true, { from: sender });
const isApproved = await token.isApprovedForAll(sender, operator);
isApproved.should.be.true;
});
it('emits an approval event', async function () {
const { logs } = await token.setApprovalForAll(operator, true, { from: sender });
logs.length.should.be.equal(1);
logs[0].event.should.be.eq('ApprovalForAll');
logs[0].args._owner.should.be.equal(sender);
logs[0].args._operator.should.be.equal(operator);
logs[0].args._approved.should.be.true;
});
});
});
describe('when the operator is the owner', function () {
const operator = _creator;
it('reverts', async function () {
await assertRevert(token.setApprovalForAll(operator, true, { from: sender }));
});
});
});
});

374
test/token/ERC721/ERC721Token.test.js
Unescape View File

@ -13,9 +13,7 @@ contract('ERC721Token', accounts => {
const _symbol = 'NFT'; const _symbol = 'NFT';
const _firstTokenId = 1; const _firstTokenId = 1;
const _secondTokenId = 2; const _secondTokenId = 2;
const _unknownTokenId = 3;
const _creator = accounts[0]; const _creator = accounts[0];
const ZERO_ADDRESS = '0x0000000000000000000000000000000000000000';
beforeEach(async function () { beforeEach(async function () {
token = await ERC721Token.new(_name, _symbol, { from: _creator }); token = await ERC721Token.new(_name, _symbol, { from: _creator });
@ -67,376 +65,4 @@ contract('ERC721Token', accounts => {
}); });
}); });
}); });
describe('setOperatorApproval', function () {
const sender = _creator;
describe('when the operator willing to approve is not the owner', function () {
const operator = accounts[1];
describe('when there is no operator approval set by the sender', function () {
it('approves the operator', async function () {
await token.setOperatorApproval(operator, true, { from: sender });
const isApproved = await token.isOperatorApprovedFor(sender, operator);
isApproved.should.be.true;
});
it('emits an approval event', async function () {
const { logs } = await token.setOperatorApproval(operator, true, { from: sender });
logs.length.should.be.equal(1);
logs[0].event.should.be.eq('OperatorApproval');
logs[0].args._owner.should.be.equal(sender);
logs[0].args._operator.should.be.equal(operator);
logs[0].args._approved.should.be.true;
});
});
describe('when the operator was set as not approved', function () {
beforeEach(async function () {
await token.setOperatorApproval(operator, false, { from: sender });
});
it('approves the operator', async function () {
await token.setOperatorApproval(operator, true, { from: sender });
const isApproved = await token.isOperatorApprovedFor(sender, operator);
isApproved.should.be.true;
});
it('emits an approval event', async function () {
const { logs } = await token.setOperatorApproval(operator, true, { from: sender });
logs.length.should.be.equal(1);
logs[0].event.should.be.eq('OperatorApproval');
logs[0].args._owner.should.be.equal(sender);
logs[0].args._operator.should.be.equal(operator);
logs[0].args._approved.should.be.true;
});
it('can unset the operator approval', async function () {
await token.setOperatorApproval(operator, false, { from: sender });
const isApproved = await token.isOperatorApprovedFor(sender, operator);
isApproved.should.be.false;
});
});
describe('when the operator was already approved', function () {
beforeEach(async function () {
await token.setOperatorApproval(operator, true, { from: sender });
});
it('keeps the approval to the given address and does not emit an approval event', async function () {
await token.setOperatorApproval(operator, true, { from: sender });
const isApproved = await token.isOperatorApprovedFor(sender, operator);
isApproved.should.be.true;
});
it('emits an approval event', async function () {
const { logs } = await token.setOperatorApproval(operator, true, { from: sender });
logs.length.should.be.equal(1);
logs[0].event.should.be.eq('OperatorApproval');
logs[0].args._owner.should.be.equal(sender);
logs[0].args._operator.should.be.equal(operator);
logs[0].args._approved.should.be.true;
});
});
});
describe('when the operator is the owner', function () {
const operator = _creator;
it('reverts', async function () {
await assertRevert(token.setOperatorApproval(operator, true, { from: sender }));
});
});
});
describe('takeOwnership', function () {
const tokenId = _firstTokenId;
describe('when the sender was approved by the owner of the token ID', function () {
const sender = accounts[1];
beforeEach(async function () {
await token.setOperatorApproval(sender, true, { from: _creator });
});
it('transfers the ownership of the given token ID to the given address', async function () {
await token.takeOwnership(tokenId, { from: sender });
const newOwner = await token.ownerOf(tokenId);
newOwner.should.be.equal(sender);
});
it('clears the approval for the token ID', async function () {
await token.takeOwnership(tokenId, { from: sender });
const approvedAccount = await token.approvedFor(tokenId);
approvedAccount.should.be.equal(ZERO_ADDRESS);
});
it('emits an approval and transfer events', async function () {
const { logs } = await token.takeOwnership(tokenId, { from: sender });
logs.length.should.be.equal(2);
logs[0].event.should.be.eq('Approval');
logs[0].args._owner.should.be.equal(_creator);
logs[0].args._approved.should.be.equal(ZERO_ADDRESS);
logs[0].args._tokenId.should.be.bignumber.equal(tokenId);
logs[1].event.should.be.eq('Transfer');
logs[1].args._from.should.be.equal(_creator);
logs[1].args._to.should.be.equal(sender);
logs[1].args._tokenId.should.be.bignumber.equal(tokenId);
});
it('adjusts owners balances', async function () {
const previousBalance = await token.balanceOf(_creator);
await token.takeOwnership(tokenId, { from: sender });
const newOwnerBalance = await token.balanceOf(sender);
newOwnerBalance.should.be.bignumber.equal(1);
const previousOwnerBalance = await token.balanceOf(_creator);
previousOwnerBalance.should.be.bignumber.equal(previousBalance - 1);
});
it('places the last token of the sender in the position of the transferred token', async function () {
const firstTokenIndex = 0;
const lastTokenIndex = await token.balanceOf(_creator) - 1;
const lastToken = await token.tokenOfOwnerByIndex(_creator, lastTokenIndex);
await token.takeOwnership(tokenId, { from: sender });
const swappedToken = await token.tokenOfOwnerByIndex(_creator, firstTokenIndex);
swappedToken.should.be.bignumber.equal(lastToken);
await assertRevert(token.tokenOfOwnerByIndex(_creator, lastTokenIndex));
});
it('adds the token to the tokens list of the new owner', async function () {
await token.takeOwnership(tokenId, { from: sender });
const tokenIDs = await token.tokensOf(sender);
tokenIDs.length.should.be.equal(1);
tokenIDs[0].should.be.bignumber.equal(tokenId);
});
});
});
describe('takeOwnershipFor', function () {
describe('when the given token ID was already tracked by this contract', function () {
const tokenId = _firstTokenId;
describe('when the sender has the approval for the token ID', function () {
const sender = accounts[1];
beforeEach(async function () {
await token.approve(sender, tokenId, { from: _creator });
});
describe('when the recipient is the zero address', function () {
const to = ZERO_ADDRESS;
it('reverts', async function () {
await assertRevert(token.takeOwnershipFor(to, tokenId, { from: sender }));
});
});
describe('when the recipient is the owner', function () {
const to = _creator;
it('reverts', async function () {
await assertRevert(token.takeOwnershipFor(to, tokenId, { from: sender }));
});
});
describe('when the recipient is not the zero address neither the owner', function () {
const to = accounts[2];
it('transfers the ownership of the given token ID to the given address', async function () {
await token.takeOwnershipFor(to, tokenId, { from: sender });
const newOwner = await token.ownerOf(tokenId);
newOwner.should.be.equal(to);
});
it('clears the approval for the token ID', async function () {
await token.takeOwnershipFor(to, tokenId, { from: sender });
const approvedAccount = await token.approvedFor(tokenId);
approvedAccount.should.be.equal(ZERO_ADDRESS);
});
it('emits an approval and transfer events', async function () {
const { logs } = await token.takeOwnershipFor(to, tokenId, { from: sender });
logs.length.should.be.equal(2);
logs[0].event.should.be.eq('Approval');
logs[0].args._owner.should.be.equal(_creator);
logs[0].args._approved.should.be.equal(ZERO_ADDRESS);
logs[0].args._tokenId.should.be.bignumber.equal(tokenId);
logs[1].event.should.be.eq('Transfer');
logs[1].args._from.should.be.equal(_creator);
logs[1].args._to.should.be.equal(to);
logs[1].args._tokenId.should.be.bignumber.equal(tokenId);
});
it('adjusts owners balances', async function () {
const previousBalance = await token.balanceOf(_creator);
await token.takeOwnershipFor(to, tokenId, { from: sender });
const newOwnerBalance = await token.balanceOf(to);
newOwnerBalance.should.be.bignumber.equal(1);
const previousOwnerBalance = await token.balanceOf(_creator);
previousOwnerBalance.should.be.bignumber.equal(previousBalance - 1);
});
it('places the last token of the sender in the position of the transferred token', async function () {
const firstTokenIndex = 0;
const lastTokenIndex = await token.balanceOf(_creator) - 1;
const lastToken = await token.tokenOfOwnerByIndex(_creator, lastTokenIndex);
await token.takeOwnershipFor(to, tokenId, { from: sender });
const swappedToken = await token.tokenOfOwnerByIndex(_creator, firstTokenIndex);
swappedToken.should.be.bignumber.equal(lastToken);
await assertRevert(token.tokenOfOwnerByIndex(_creator, lastTokenIndex));
});
it('adds the token to the tokens list of the new owner', async function () {
await token.takeOwnershipFor(to, tokenId, { from: sender });
const tokenIDs = await token.tokensOf(to);
tokenIDs.length.should.be.equal(1);
tokenIDs[0].should.be.bignumber.equal(tokenId);
});
});
});
describe('when the sender was approved by the owner of the token ID', function () {
const sender = accounts[1];
beforeEach(async function () {
await token.setOperatorApproval(sender, true, { from: _creator });
});
describe('when the recipient is the zero address', function () {
const to = ZERO_ADDRESS;
it('reverts', async function () {
await assertRevert(token.takeOwnershipFor(to, tokenId, { from: sender }));
});
});
describe('when the recipient is the owner', function () {
const to = _creator;
it('reverts', async function () {
await assertRevert(token.takeOwnershipFor(to, tokenId, { from: sender }));
});
});
describe('when the recipient is not the zero address neither the owner', function () {
const to = accounts[2];
it('transfers the ownership of the given token ID to the given address', async function () {
await token.takeOwnershipFor(to, tokenId, { from: sender });
const newOwner = await token.ownerOf(tokenId);
newOwner.should.be.equal(to);
});
it('clears the approval for the token ID', async function () {
await token.takeOwnershipFor(to, tokenId, { from: sender });
const approvedAccount = await token.approvedFor(tokenId);
approvedAccount.should.be.equal(ZERO_ADDRESS);
});
it('emits an approval and transfer events', async function () {
const { logs } = await token.takeOwnershipFor(to, tokenId, { from: sender });
logs.length.should.be.equal(2);
logs[0].event.should.be.eq('Approval');
logs[0].args._owner.should.be.equal(_creator);
logs[0].args._approved.should.be.equal(ZERO_ADDRESS);
logs[0].args._tokenId.should.be.bignumber.equal(tokenId);
logs[1].event.should.be.eq('Transfer');
logs[1].args._from.should.be.equal(_creator);
logs[1].args._to.should.be.equal(to);
logs[1].args._tokenId.should.be.bignumber.equal(tokenId);
});
it('adjusts owners balances', async function () {
const previousBalance = await token.balanceOf(_creator);
await token.takeOwnershipFor(to, tokenId, { from: sender });
const newOwnerBalance = await token.balanceOf(to);
newOwnerBalance.should.be.bignumber.equal(1);
const previousOwnerBalance = await token.balanceOf(_creator);
previousOwnerBalance.should.be.bignumber.equal(previousBalance - 1);
});
it('places the last token of the sender in the position of the transferred token', async function () {
const firstTokenIndex = 0;
const lastTokenIndex = await token.balanceOf(_creator) - 1;
const lastToken = await token.tokenOfOwnerByIndex(_creator, lastTokenIndex);
await token.takeOwnershipFor(to, tokenId, { from: sender });
const swappedToken = await token.tokenOfOwnerByIndex(_creator, firstTokenIndex);
swappedToken.should.be.bignumber.equal(lastToken);
await assertRevert(token.tokenOfOwnerByIndex(_creator, lastTokenIndex));
});
it('adds the token to the tokens list of the new owner', async function () {
await token.takeOwnershipFor(to, tokenId, { from: sender });
const tokenIDs = await token.tokensOf(to);
tokenIDs.length.should.be.equal(1);
tokenIDs[0].should.be.bignumber.equal(tokenId);
});
});
});
describe('when the sender does not have an approval for the token ID', function () {
const sender = accounts[1];
it('reverts', async function () {
await assertRevert(token.takeOwnershipFor(accounts[2], tokenId, { from: sender }));
});
});
describe('when the sender is already the owner of the token', function () {
const sender = _creator;
it('reverts', async function () {
await assertRevert(token.takeOwnershipFor(accounts[2], tokenId, { from: sender }));
});
});
});
describe('when the given token ID was not tracked by the contract before', function () {
const tokenId = _unknownTokenId;
it('reverts', async function () {
await assertRevert(token.takeOwnershipFor(accounts[2], tokenId, { from: _creator }));
});
});
});
}); });

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