mirror of https://github.com/vacp2p/minime.git
Some changes
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@ -19,13 +19,12 @@
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pragma solidity ^0.4.4;
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contract Owned {
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/// @notice The address of the owner is the only address that can call a
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/// function with this modifier
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/// @notice The address of the owner is the only address that can call a
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/// function with this modifier
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modifier onlyOwner { if (msg.sender != owner) throw; _; }
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address public owner;
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/// @return Returns the owner of this token
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function Owned() { owner = msg.sender;}
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/// @notice Changes the owner of the contract
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@ -54,7 +53,7 @@ contract MiniMeToken is Owned {
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// `fromBlock` is the block number that the value was generated from
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uint fromBlock;
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// `value` is the attribute in question at a specific block number
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// `value` is the attribute in question at a specific block number
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uint value;
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}
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@ -68,14 +67,19 @@ contract MiniMeToken is Owned {
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// `creationBlock` is the block number that the Cloned Token was created
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uint public creationBlock;
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// `balances` is the map that tracks the balance of each address
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mapping (address => Checkpoint[]) balances;
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// `balances` is the map that tracks the balance of each address
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mapping (address => Checkpoint[]) balances;
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// `allowed` tracks any extra transfer rights as in all ERC20 tokens
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mapping (address => mapping (address => uint256)) allowed;
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// Tracks the history of the `totalSupply` of the token
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Checkpoint[] totalSupplyHistory;
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// Flag that determines if the token is transferable or not.
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bool public isConstant;
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// The factory used to create new cloned tokens
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MiniMeTokenFactory public tokenFactory;
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////////////////
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@ -88,7 +92,8 @@ contract MiniMeToken is Owned {
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/// @param _parentToken Address of the parent token, set to 0x0 if it is a
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/// new token
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/// @param _parentSnapShotBlock Block of the parent token that will
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/// determine the initial distribution of the cloned token
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/// determine the initial distribution of the cloned token, set to 0 if it
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/// is a new token
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/// @param _tokenName Name of the new token
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/// @param _decimalUnits Number of decimals of the new token
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/// @param _tokenSymbol Token Symbol for the new token
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@ -103,7 +108,7 @@ contract MiniMeToken is Owned {
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bool _isConstant
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) {
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tokenFactory = MiniMeTokenFactory(_tokenFactory);
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name = _tokenName; // Set the name
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name = _tokenName; // Set the name
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decimals = _decimalUnits; // Set the decimals
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symbol = _tokenSymbol; // Set the symbol
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parentToken = MiniMeToken(_parentToken);
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@ -114,7 +119,7 @@ contract MiniMeToken is Owned {
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///////////////////
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// ERC20 Functions
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// ERC20 Methods
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///////////////////
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/// @notice Send `_amount` tokens to `_to` from `msg.sender`
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@ -128,11 +133,11 @@ contract MiniMeToken is Owned {
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/// @notice Send `_amount` tokens to `_to` from `_from` on the condition it
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/// is approved by `_from`
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/// @param _from The address holding the tokens being transferred
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/// @param _from The address holding the tokens being transferred
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/// @param _to The address of the recipient
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/// @param _amount The amount of tokens to be transferred
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/// @return True if the transfer was successful
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function transferFrom(address _from, address _to, uint256 _amount)
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function transferFrom(address _from, address _to, uint256 _amount)
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returns (bool success) {
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// The owner of this contract can move tokens around at will, this is
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@ -158,7 +163,7 @@ contract MiniMeToken is Owned {
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// Do not allow transfer to 0x0 or the token contract itself
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if ((_to == 0) || (_to == address(this))) throw;
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// If the amount being transfered is more than the balance of the
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// If the amount being transfered is more than the balance of the
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// account the transfer returns false
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var previousBalanceFrom = balanceOfAt(_from, block.number);
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if (previousBalanceFrom < _amount) {
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@ -206,7 +211,7 @@ contract MiniMeToken is Owned {
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return allowed[_owner][_spender];
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}
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/* Approves and then calls the receiving contract (Copied from the Consensis Standard contract) */
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/* Approves and then calls the receiving contract (Copied from the Consensys Standard contract) */
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function approveAndCall(address _spender, uint256 _amount, bytes _extraData) returns (bool success) {
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if (isConstant) throw;
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allowed[msg.sender][_spender] = _amount;
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@ -233,23 +238,24 @@ contract MiniMeToken is Owned {
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/// @param _owner The address from which the balance will be retrieved
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/// @param _blockNumber block number when the balance is queried
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/// @return The balance at `_blockNumber`
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function balanceOfAt(address _owner, uint _blockNumber) constant
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function balanceOfAt(address _owner, uint _blockNumber) constant
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returns (uint) {
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// If the _blockNumber requested is before the genesis block for the
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// `parentToken` the value returned is 0
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// If the _blockNumber requested is before the genesis block for the
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// token the value returned is 0
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if (_blockNumber < creationBlock) {
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return 0;
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// These next few lines are used when the balance of the token is
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// These next few lines are used when the balance of the token is
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// requested before a check point was ever created for this token, it
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// requires that the `parentToken.balanceOfAt` be queried at the genesis
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// block for this token as this contains initial balance of this token.
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// block for this token as this contains initial balance of this token.
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} else if ((balances[_owner].length == 0)
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|| (balances[_owner][0].fromBlock > _blockNumber)) {
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if (address(parentToken) != 0) {
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return parentToken.balanceOfAt(_owner, parentSnapShotBlock);
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} else {
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// Has no parent
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return 0;
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}
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@ -278,19 +284,19 @@ contract MiniMeToken is Owned {
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}
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////////////////
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// Create a child token from an snapshot of this token at a given block
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// Clone Token Method
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////////////////
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/// @notice creates a new child token with the initial distribution the same
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/// that this token at `_snapshotBlock`
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/// that this token at `_snapshotBlock`
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/// @param _childTokenName Name of the child token
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/// @param _childDecimalUnits Units of the child token
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/// @param _childTokenSymbol Symbol of the child token
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/// @param _snapshotBlock Block at when the the distribution of the parent
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/// token is taken as the initial thistribution of the new generated token.
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/// If the block is higher that the actual block, the actual block is token
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/// token is taken as the initial thistribution of the new generated token.
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/// If the block is higher that the actual block, the actual block is token
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/// @param _isConstant Sets if the new child contract will allow transfers
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/// or not.
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/// or not.
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/// @return The address of the new MiniMeToken Contract
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function createChildToken(string _childTokenName, uint8 _childDecimalUnits, string _childTokenSymbol, uint _snapshotBlock, bool _isConstant) returns(address) {
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if (_snapshotBlock > block.number) _snapshotBlock = block.number;
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@ -352,6 +358,8 @@ contract MiniMeToken is Owned {
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// Shorcut for the actual value
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if (_block >= checkpoints[checkpoints.length-1].fromBlock) return checkpoints[checkpoints.length-1].value;
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if (_block < checkpoints[0].fromBlock) return 0;
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// Binary search of the value in the array.
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uint min = 0;
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uint max = checkpoints.length-1;
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while (max > min) {
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@ -396,6 +404,14 @@ contract MiniMeToken is Owned {
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}
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////////////////
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// MiniMeTokenFactory
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////////////////
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// This contract is used to generate child contracts from a contract.
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// In solidity this is the way to create a contract from a contract of the same
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// class
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contract MiniMeTokenFactory {
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function createChildToken(
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address _parentToken,
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