ERC888 token implementation.
The following standard allows to store the set of unique (like ERC721), but splittable (like ERC20) token.
This standard allow us to make tokenizing assets cheaper (we do not need to publish separate contract for each asset). Also ERC888 tokens allow us to create DApps easier, because all tokens corresponding the DApp are stored in one contract.
Returns the total token supply by it’s ID
function totalSupply(uint256 _tokenId) external view returns (uint256)
Returns the account balance of token by it’s ID of another account with address _owner
function balanceOf(uint256 _tokenId, address _owner) external view returns (uint256)
Returns the amount of tokens by it’s ID which _spender is still allowed to withdraw from _owner.
function allowance(uint256 _tokenId, address _owner, address _spender) external view returns (uint256)
Allows _spender to withdraw tokens by it’s ID from your account multiple times, up to the _value amount. If this function is called again it overwrites the current allowance with _value.
function approve(uint256 _tokenId, address _spender, uint256 _value) external returns (bool)
Transfers _value amount of tokens by it’s ID to address _to, and MUST fire the Transfer event. The function SHOULD throw if the _from account balance does not have enough tokens by it’s ID to spend.
function transfer(uint256 _tokenId, address _to, uint256 _value) external returns (bool)
Transfers _value amount of tokens from address _from to address _to, and MUST fire the Transfer event.
function transferFrom(uint256 _tokenId, address _from, address _to, uint256 _value) external returns (bool)
A token contract which creates new tokens by it’s ID SHOULD trigger a Transfer event with the _from address set to 0x0 when tokens are created.
event Transfer(uint256 indexed tokenId, address indexed from, address indexed to, uint256 value)
MUST trigger on any successful call to approve(uint256 _tokenId, address _spender, uint256 _value)
event Approval(uint256 indexed tokenId, address indexed owner, address indexed spender, uint256 value)
Use truffle migrate --network ganache to deploy contract on ganache.
Use
geth --dev --rpccorsdomain="*" --rpcaddr="0.0.0.0" --rpc --rpcapi="personal,eth,net,debug,web3,db,admin" --networkid 7555 --dev.period=1
to setup remix compatible debug supporting test ethereum blockchain and truffle migrate --network geth_dev to deploy the contract.
Strictly recommended to use solium linter. solium -d contracts
If you have compilation errors due to emit Event in solidity, update truffle.
| utility token natspec documentation | link |
| security token natspec documentation | link |