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feat: use MinimeToken with SNT

This commit is contained in:
Richard Ramos 2019-06-18 15:56:50 -04:00
parent 56ec0fd050
commit 5c468d169d
15 changed files with 9821 additions and 109 deletions
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23
config/contracts.js
View File

@ -49,13 +49,26 @@ module.exports = {
// when not specified
// - explicit will only attempt to deploy the contracts that are explicitly specified inside the
// contracts section.
//strategy: 'implicit',
strategy: 'explicit',
contracts: {
// example:
//SimpleStorage: {
// args: [ 100 ]
//}
"MiniMeToken": { "deploy": false },
"MiniMeTokenFactory": { },
"SNT": {
"instanceOf": "MiniMeToken",
"args": [
"$MiniMeTokenFactory",
"0x0000000000000000000000000000000000000000",
0,
"TestMiniMeToken",
18,
"STT",
true
]
},
"StakingPool": {
"args": ["$SNT"]
}
}
},

45
contracts/StakingPool.sol
View File

@ -4,9 +4,10 @@ import "openzeppelin-solidity/contracts/token/ERC20/IERC20.sol";
import "openzeppelin-solidity/contracts/token/ERC20/ERC20.sol";
import "openzeppelin-solidity/contracts/token/ERC20/ERC20Detailed.sol";
import "openzeppelin-solidity/contracts/token/ERC20/ERC20Burnable.sol";
import "math.sol";
import "./math.sol";
import "./token/ApproveAndCallFallBack.sol";
contract StakingPool is ERC20, ERC20Detailed, ERC20Burnable, DSMath {
contract StakingPool is ERC20, ERC20Detailed, ERC20Burnable, DSMath, ApproveAndCallFallBack {
uint private INITIAL_SUPPLY = 0;
IERC20 public token;
@ -25,15 +26,49 @@ contract StakingPool is ERC20, ERC20Detailed, ERC20Burnable, DSMath {
}
function deposit (uint256 amount) public payable {
_deposit(msg.sender, amount);
}
function _deposit(address _from, uint256 amount) internal {
uint256 equivalentTokens = estimatedTokens(amount);
token.transferFrom(msg.sender, address(this), amount);
_mint(msg.sender, equivalentTokens);
require(token.transferFrom(_from, address(this), amount), "Couldn't transfer");
_mint(_from, equivalentTokens);
}
function withdraw (uint256 amount) public {
uint256 rate = exchangeRate(0);
burn(amount);
token.transfer(msg.sender, wmul(amount, wdiv(rate, 1000000000000000000)));
require(token.transfer(msg.sender, wmul(amount, wdiv(rate, 1000000000000000000))), "Couldn't transfer");
}
/**
* @notice Support for "approveAndCall". Callable only by `token()`.
* @param _from Who approved.
* @param _amount Amount being approved,
* @param _token Token being approved, need to be equal `token()`.
* @param _data Abi encoded data`.
*/
function receiveApproval(address _from, uint256 _amount, address _token, bytes memory _data) public {
require(_token == address(token), "Wrong token");
require(_token == address(msg.sender), "Wrong call");
require(_data.length == 36, "Wrong data length");
bytes4 sig;
uint amount;
(sig, amount) = abiDecodeRegister(_data);
require(amount == _amount, "Amounts mismatch");
require(sig == 0xb6b55f25, "Wrong method selector"); // deposit(uint256)
_deposit(_from, amount);
}
function abiDecodeRegister(bytes memory _data) private returns(
bytes4 sig,
uint256 amount
) {
assembly {
sig := mload(add(_data, add(0x20, 0)))
amount := mload(add(_data, 36))
}
}
}

22
contracts/common/Controlled.sol Normal file
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@ -0,0 +1,22 @@
pragma solidity ^0.5.7;
contract Controlled {
/// @notice The address of the controller is the only address that can call
/// a function with this modifier
modifier onlyController {
require(msg.sender == controller, "Unauthorized");
_;
}
address payable public controller;
constructor() internal {
controller = msg.sender;
}
/// @notice Changes the controller of the contract
/// @param _newController The new controller of the contract
function changeController(address payable _newController) public onlyController {
controller = _newController;
}
}

5
contracts/token/ApproveAndCallFallBack.sol Normal file
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@ -0,0 +1,5 @@
pragma solidity ^0.5.7;
contract ApproveAndCallFallBack {
function receiveApproval(address from, uint256 _amount, address _token, bytes memory _data) public;
}

90
contracts/token/ERC20Receiver.sol Normal file
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@ -0,0 +1,90 @@
pragma solidity ^0.5.7;
import "./ERC20Token.sol";
contract ERC20Receiver {
event TokenDeposited(address indexed token, address indexed sender, uint256 amount);
event TokenWithdrawn(address indexed token, address indexed sender, uint256 amount);
mapping (address => mapping(address => uint256)) tokenBalances;
constructor() public {
}
function depositToken(
ERC20Token _token
)
external
{
_depositToken(
msg.sender,
_token,
_token.allowance(
msg.sender,
address(this)
)
);
}
function withdrawToken(
ERC20Token _token,
uint256 _amount
)
external
{
_withdrawToken(msg.sender, _token, _amount);
}
function depositToken(
ERC20Token _token,
uint256 _amount
)
external
{
require(_token.allowance(msg.sender, address(this)) >= _amount, "Bad argument");
_depositToken(msg.sender, _token, _amount);
}
function tokenBalanceOf(
ERC20Token _token,
address _from
)
external
view
returns(uint256 fromTokenBalance)
{
return tokenBalances[address(_token)][_from];
}
function _depositToken(
address _from,
ERC20Token _token,
uint256 _amount
)
private
{
require(_amount != 0, "Amount is required to be more than zero");
if (_token.transferFrom(_from, address(this), _amount)) {
tokenBalances[address(_token)][_from] += _amount;
emit TokenDeposited(address(_token), _from, _amount);
}
}
function _withdrawToken(
address _from,
ERC20Token _token,
uint256 _amount
)
private
{
require(_amount > 0, "Bad argument");
require(tokenBalances[address(_token)][_from] >= _amount, "Insufficient funds");
tokenBalances[address(_token)][_from] -= _amount;
require(_token.transfer(_from, _amount), "Transfer fail");
emit TokenWithdrawn(address(_token), _from, _amount);
}
}

53
contracts/token/ERC20Token.sol Normal file
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@ -0,0 +1,53 @@
pragma solidity ^0.5.7;
// Abstract contract for the full ERC 20 Token standard
// https://github.com/ethereum/EIPs/issues/20
interface ERC20Token {
/**
* @notice send `_value` token to `_to` from `msg.sender`
* @param _to The address of the recipient
* @param _value The amount of token to be transferred
* @return Whether the transfer was successful or not
*/
function transfer(address _to, uint256 _value) external returns (bool success);
/**
* @notice `msg.sender` approves `_spender` to spend `_value` tokens
* @param _spender The address of the account able to transfer the tokens
* @param _value The amount of tokens to be approved for transfer
* @return Whether the approval was successful or not
*/
function approve(address _spender, uint256 _value) external returns (bool success);
/**
* @notice send `_value` token to `_to` from `_from` on the condition it is approved by `_from`
* @param _from The address of the sender
* @param _to The address of the recipient
* @param _value The amount of token to be transferred
* @return Whether the transfer was successful or not
*/
function transferFrom(address _from, address _to, uint256 _value) external returns (bool success);
/**
* @param _owner The address from which the balance will be retrieved
* @return The balance
*/
function balanceOf(address _owner) external view returns (uint256 balance);
/**
* @param _owner The address of the account owning tokens
* @param _spender The address of the account able to transfer the tokens
* @return Amount of remaining tokens allowed to spent
*/
function allowance(address _owner, address _spender) external view returns (uint256 remaining);
/**
* @notice return total supply of tokens
*/
function totalSupply() external view returns (uint256 supply);
event Transfer(address indexed _from, address indexed _to, uint256 _value);
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
}

637
contracts/token/MiniMeToken.sol Normal file
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@ -0,0 +1,637 @@
pragma solidity ^0.5.7;
/*
Copyright 2016, Jordi Baylina
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* @title MiniMeToken Contract
* @author Jordi Baylina
* @dev This token contract's goal is to make it easy for anyone to clone this
* token using the token distribution at a given block, this will allow DAO's
* and DApps to upgrade their features in a decentralized manner without
* affecting the original token
* @dev It is ERC20 compliant, but still needs to under go further testing.
*/
import "../common/Controlled.sol";
import "./TokenController.sol";
import "./ApproveAndCallFallBack.sol";
import "./MiniMeTokenInterface.sol";
import "./TokenFactory.sol";
/**
* @dev The actual token contract, the default controller is the msg.sender
* that deploys the contract, so usually this token will be deployed by a
* token controller contract, which Giveth will call a "Campaign"
*/
contract MiniMeToken is MiniMeTokenInterface, Controlled {
string public name; //The Token's name: e.g. DigixDAO Tokens
uint8 public decimals; //Number of decimals of the smallest unit
string public symbol; //An identifier: e.g. REP
string public version = "MMT_0.1"; //An arbitrary versioning scheme
/**
* @dev `Checkpoint` is the structure that attaches a block number to a
* given value, the block number attached is the one that last changed the
* value
*/
struct Checkpoint {
// `fromBlock` is the block number that the value was generated from
uint128 fromBlock;
// `value` is the amount of tokens at a specific block number
uint128 value;
}
// `parentToken` is the Token address that was cloned to produce this token;
// it will be 0x0 for a token that was not cloned
MiniMeToken public parentToken;
// `parentSnapShotBlock` is the block number from the Parent Token that was
// used to determine the initial distribution of the Clone Token
uint public parentSnapShotBlock;
// `creationBlock` is the block number that the Clone Token was created
uint public creationBlock;
// `balances` is the map that tracks the balance of each address, in this
// contract when the balance changes the block number that the change
// occurred is also included in the map
mapping (address => Checkpoint[]) balances;
// `allowed` tracks any extra transfer rights as in all ERC20 tokens
mapping (address => mapping (address => uint256)) allowed;
// Tracks the history of the `totalSupply` of the token
Checkpoint[] totalSupplyHistory;
// Flag that determines if the token is transferable or not.
bool public transfersEnabled;
// The factory used to create new clone tokens
TokenFactory public tokenFactory;
////////////////
// Constructor
////////////////
/**
* @notice Constructor to create a MiniMeToken
* @param _tokenFactory The address of the MiniMeTokenFactory contract that
* will create the Clone token contracts, the token factory needs to be
* deployed first
* @param _parentToken Address of the parent token, set to 0x0 if it is a
* new token
* @param _parentSnapShotBlock Block of the parent token that will
* determine the initial distribution of the clone token, set to 0 if it
* is a new token
* @param _tokenName Name of the new token
* @param _decimalUnits Number of decimals of the new token
* @param _tokenSymbol Token Symbol for the new token
* @param _transfersEnabled If true, tokens will be able to be transferred
*/
constructor(
address _tokenFactory,
address _parentToken,
uint _parentSnapShotBlock,
string memory _tokenName,
uint8 _decimalUnits,
string memory _tokenSymbol,
bool _transfersEnabled
)
public
{
tokenFactory = TokenFactory(_tokenFactory);
name = _tokenName; // Set the name
decimals = _decimalUnits; // Set the decimals
symbol = _tokenSymbol; // Set the symbol
parentToken = MiniMeToken(address(uint160(_parentToken)));
parentSnapShotBlock = _parentSnapShotBlock;
transfersEnabled = _transfersEnabled;
creationBlock = block.number;
}
///////////////////
// ERC20 Methods
///////////////////
/**
* @notice Send `_amount` tokens to `_to` from `msg.sender`
* @param _to The address of the recipient
* @param _amount The amount of tokens to be transferred
* @return Whether the transfer was successful or not
*/
function transfer(address _to, uint256 _amount) public returns (bool success) {
require(transfersEnabled);
return doTransfer(msg.sender, _to, _amount);
}
/**
* @notice Send `_amount` tokens to `_to` from `_from` on the condition it
* is approved by `_from`
* @param _from The address holding the tokens being transferred
* @param _to The address of the recipient
* @param _amount The amount of tokens to be transferred
* @return True if the transfer was successful
*/
function transferFrom(
address _from,
address _to,
uint256 _amount
)
public
returns (bool success)
{
// The controller of this contract can move tokens around at will,
// this is important to recognize! Confirm that you trust the
// controller of this contract, which in most situations should be
// another open source smart contract or 0x0
if (msg.sender != controller) {
require(transfersEnabled);
// The standard ERC 20 transferFrom functionality
if (allowed[_from][msg.sender] < _amount) {
return false;
}
allowed[_from][msg.sender] -= _amount;
}
return doTransfer(_from, _to, _amount);
}
/**
* @dev This is the actual transfer function in the token contract, it can
* only be called by other functions in this contract.
* @param _from The address holding the tokens being transferred
* @param _to The address of the recipient
* @param _amount The amount of tokens to be transferred
* @return True if the transfer was successful
*/
function doTransfer(
address _from,
address _to,
uint _amount
)
internal
returns(bool)
{
if (_amount == 0) {
return true;
}
require(parentSnapShotBlock < block.number);
// Do not allow transfer to 0x0 or the token contract itself
require((_to != address(0)) && (_to != address(this)));
// If the amount being transfered is more than the balance of the
// account the transfer returns false
uint256 previousBalanceFrom = balanceOfAt(_from, block.number);
if (previousBalanceFrom < _amount) {
return false;
}
// Alerts the token controller of the transfer
if (isContract(controller)) {
require(TokenController(controller).onTransfer(_from, _to, _amount));
}
// First update the balance array with the new value for the address
// sending the tokens
updateValueAtNow(balances[_from], previousBalanceFrom - _amount);
// Then update the balance array with the new value for the address
// receiving the tokens
uint256 previousBalanceTo = balanceOfAt(_to, block.number);
require(previousBalanceTo + _amount >= previousBalanceTo); // Check for overflow
updateValueAtNow(balances[_to], previousBalanceTo + _amount);
// An event to make the transfer easy to find on the blockchain
emit Transfer(_from, _to, _amount);
return true;
}
function doApprove(
address _from,
address _spender,
uint256 _amount
)
internal
returns (bool)
{
require(transfersEnabled);
// To change the approve amount you first have to reduce the addresses`
// allowance to zero by calling `approve(_spender,0)` if it is not
// already 0 to mitigate the race condition described here:
// https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
require((_amount == 0) || (allowed[_from][_spender] == 0));
// Alerts the token controller of the approve function call
if (isContract(controller)) {
require(TokenController(controller).onApprove(_from, _spender, _amount));
}
allowed[_from][_spender] = _amount;
emit Approval(_from, _spender, _amount);
return true;
}
/**
* @param _owner The address that's balance is being requested
* @return The balance of `_owner` at the current block
*/
function balanceOf(address _owner) external view returns (uint256 balance) {
return balanceOfAt(_owner, block.number);
}
/**
* @notice `msg.sender` approves `_spender` to spend `_amount` tokens on
* its behalf. This is a modified version of the ERC20 approve function
* to be a little bit safer
* @param _spender The address of the account able to transfer the tokens
* @param _amount The amount of tokens to be approved for transfer
* @return True if the approval was successful
*/
function approve(address _spender, uint256 _amount) external returns (bool success) {
doApprove(msg.sender, _spender, _amount);
}
/**
* @dev This function makes it easy to read the `allowed[]` map
* @param _owner The address of the account that owns the token
* @param _spender The address of the account able to transfer the tokens
* @return Amount of remaining tokens of _owner that _spender is allowed
* to spend
*/
function allowance(
address _owner,
address _spender
)
external
view
returns (uint256 remaining)
{
return allowed[_owner][_spender];
}
/**
* @notice `msg.sender` approves `_spender` to send `_amount` tokens on
* its behalf, and then a function is triggered in the contract that is
* being approved, `_spender`. This allows users to use their tokens to
* interact with contracts in one function call instead of two
* @param _spender The address of the contract able to transfer the tokens
* @param _amount The amount of tokens to be approved for transfer
* @return True if the function call was successful
*/
function approveAndCall(
address _spender,
uint256 _amount,
bytes memory _extraData
)
public
returns (bool success)
{
require(doApprove(msg.sender, _spender, _amount));
ApproveAndCallFallBack(_spender).receiveApproval(
msg.sender,
_amount,
address(this),
_extraData
);
return true;
}
/**
* @dev This function makes it easy to get the total number of tokens
* @return The total number of tokens
*/
function totalSupply() external view returns (uint) {
return totalSupplyAt(block.number);
}
////////////////
// Query balance and totalSupply in History
////////////////
/**
* @dev Queries the balance of `_owner` at a specific `_blockNumber`
* @param _owner The address from which the balance will be retrieved
* @param _blockNumber The block number when the balance is queried
* @return The balance at `_blockNumber`
*/
function balanceOfAt(
address _owner,
uint _blockNumber
)
public
view
returns (uint)
{
// These next few lines are used when the balance of the token is
// requested before a check point was ever created for this token, it
// requires that the `parentToken.balanceOfAt` be queried at the
// genesis block for that token as this contains initial balance of
// this token
if ((balances[_owner].length == 0)
|| (balances[_owner][0].fromBlock > _blockNumber)) {
if (address(parentToken) != address(0)) {
return parentToken.balanceOfAt(_owner, min(_blockNumber, parentSnapShotBlock));
} else {
// Has no parent
return 0;
}
// This will return the expected balance during normal situations
} else {
return getValueAt(balances[_owner], _blockNumber);
}
}
/**
* @notice Total amount of tokens at a specific `_blockNumber`.
* @param _blockNumber The block number when the totalSupply is queried
* @return The total amount of tokens at `_blockNumber`
*/
function totalSupplyAt(uint _blockNumber) public view returns(uint) {
// These next few lines are used when the totalSupply of the token is
// requested before a check point was ever created for this token, it
// requires that the `parentToken.totalSupplyAt` be queried at the
// genesis block for this token as that contains totalSupply of this
// token at this block number.
if ((totalSupplyHistory.length == 0)
|| (totalSupplyHistory[0].fromBlock > _blockNumber)) {
if (address(parentToken) != address(0)) {
return parentToken.totalSupplyAt(min(_blockNumber, parentSnapShotBlock));
} else {
return 0;
}
// This will return the expected totalSupply during normal situations
} else {
return getValueAt(totalSupplyHistory, _blockNumber);
}
}
////////////////
// Clone Token Method
////////////////
/**
* @notice Creates a new clone token with the initial distribution being
* this token at `snapshotBlock`
* @param _cloneTokenName Name of the clone token
* @param _cloneDecimalUnits Number of decimals of the smallest unit
* @param _cloneTokenSymbol Symbol of the clone token
* @param _snapshotBlock Block when the distribution of the parent token is
* copied to set the initial distribution of the new clone token;
* if the block is zero than the actual block, the current block is used
* @param _transfersEnabled True if transfers are allowed in the clone
* @return The address of the new MiniMeToken Contract
*/
function createCloneToken(
string memory _cloneTokenName,
uint8 _cloneDecimalUnits,
string memory _cloneTokenSymbol,
uint _snapshotBlock,
bool _transfersEnabled
)
public
returns(address)
{
uint snapshotBlock = _snapshotBlock;
if (snapshotBlock == 0) {
snapshotBlock = block.number;
}
MiniMeToken cloneToken = MiniMeToken(tokenFactory.createCloneToken(
address(this),
snapshotBlock,
_cloneTokenName,
_cloneDecimalUnits,
_cloneTokenSymbol,
_transfersEnabled
));
cloneToken.changeController(msg.sender);
// An event to make the token easy to find on the blockchain
emit NewCloneToken(address(cloneToken), snapshotBlock);
return address(cloneToken);
}
////////////////
// Generate and destroy tokens
////////////////
/**
* @notice Generates `_amount` tokens that are assigned to `_owner`
* @param _owner The address that will be assigned the new tokens
* @param _amount The quantity of tokens generated
* @return True if the tokens are generated correctly
*/
function generateTokens(
address _owner,
uint _amount
)
public
onlyController
returns (bool)
{
uint curTotalSupply = totalSupplyAt(block.number);
require(curTotalSupply + _amount >= curTotalSupply); // Check for overflow
uint previousBalanceTo = balanceOfAt(_owner, block.number);
require(previousBalanceTo + _amount >= previousBalanceTo); // Check for overflow
updateValueAtNow(totalSupplyHistory, curTotalSupply + _amount);
updateValueAtNow(balances[_owner], previousBalanceTo + _amount);
emit Transfer(address(0), _owner, _amount);
return true;
}
/**
* @notice Burns `_amount` tokens from `_owner`
* @param _owner The address that will lose the tokens
* @param _amount The quantity of tokens to burn
* @return True if the tokens are burned correctly
*/
function destroyTokens(
address _owner,
uint _amount
)
public
onlyController
returns (bool)
{
uint curTotalSupply = totalSupplyAt(block.number);
require(curTotalSupply >= _amount);
uint previousBalanceFrom = balanceOfAt(_owner, block.number);
require(previousBalanceFrom >= _amount);
updateValueAtNow(totalSupplyHistory, curTotalSupply - _amount);
updateValueAtNow(balances[_owner], previousBalanceFrom - _amount);
emit Transfer(_owner, address(0), _amount);
return true;
}
////////////////
// Enable tokens transfers
////////////////
/**
* @notice Enables token holders to transfer their tokens freely if true
* @param _transfersEnabled True if transfers are allowed in the clone
*/
function enableTransfers(bool _transfersEnabled) public onlyController {
transfersEnabled = _transfersEnabled;
}
////////////////
// Internal helper functions to query and set a value in a snapshot array
////////////////
/**
* @dev `getValueAt` retrieves the number of tokens at a given block number
* @param checkpoints The history of values being queried
* @param _block The block number to retrieve the value at
* @return The number of tokens being queried
*/
function getValueAt(
Checkpoint[] storage checkpoints,
uint _block
)
internal
view
returns (uint)
{
if (checkpoints.length == 0) {
return 0;
}
// Shortcut for the actual value
if (_block >= checkpoints[checkpoints.length-1].fromBlock) {
return checkpoints[checkpoints.length-1].value;
}
if (_block < checkpoints[0].fromBlock) {
return 0;
}
// Binary search of the value in the array
uint min = 0;
uint max = checkpoints.length-1;
while (max > min) {
uint mid = (max + min + 1) / 2;
if (checkpoints[mid].fromBlock<=_block) {
min = mid;
} else {
max = mid-1;
}
}
return checkpoints[min].value;
}
/**
* @dev `updateValueAtNow` used to update the `balances` map and the
* `totalSupplyHistory`
* @param checkpoints The history of data being updated
* @param _value The new number of tokens
*/
function updateValueAtNow(Checkpoint[] storage checkpoints, uint _value) internal {
if ((checkpoints.length == 0)
|| (checkpoints[checkpoints.length -1].fromBlock < block.number)) {
Checkpoint storage newCheckPoint = checkpoints[checkpoints.length++];
newCheckPoint.fromBlock = uint128(block.number);
newCheckPoint.value = uint128(_value);
} else {
Checkpoint storage oldCheckPoint = checkpoints[checkpoints.length-1];
oldCheckPoint.value = uint128(_value);
}
}
/**
* @dev Internal function to determine if an address is a contract
* @param _addr The address being queried
* @return True if `_addr` is a contract
*/
function isContract(address _addr) internal view returns(bool) {
uint size;
if (_addr == address(0)){
return false;
}
assembly {
size := extcodesize(_addr)
}
return size>0;
}
/**
* @dev Helper function to return a min betwen the two uints
*/
function min(uint a, uint b) internal pure returns (uint) {
return a < b ? a : b;
}
/**
* @notice The fallback function: If the contract's controller has not been
* set to 0, then the `proxyPayment` method is called which relays the
* ether and creates tokens as described in the token controller contract
*/
function () external payable {
require(isContract(controller));
require(TokenController(controller).proxyPayment.value(msg.value)(msg.sender));
}
//////////
// Safety Methods
//////////
/**
* @notice This method can be used by the controller to extract mistakenly
* sent tokens to this contract.
* @param _token The address of the token contract that you want to recover
* set to 0 in case you want to extract ether.
*/
function claimTokens(address _token) public onlyController {
if (_token == address(0)) {
controller.transfer(address(this).balance);
return;
}
MiniMeToken token = MiniMeToken(address(uint160(_token)));
uint balance = token.balanceOf(address(this));
token.transfer(controller, balance);
emit ClaimedTokens(_token, controller, balance);
}
////////////////
// Events
////////////////
event ClaimedTokens(address indexed _token, address indexed _controller, uint _amount);
event Transfer(address indexed _from, address indexed _to, uint256 _amount);
event NewCloneToken(address indexed _cloneToken, uint snapshotBlock);
event Approval(
address indexed _owner,
address indexed _spender,
uint256 _amount
);
}

50
contracts/token/MiniMeTokenFactory.sol Normal file
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@ -0,0 +1,50 @@
pragma solidity ^0.5.7;
import "./TokenFactory.sol";
import "./MiniMeToken.sol";
////////////////
// MiniMeTokenFactory
////////////////
/**
* @dev This contract is used to generate clone contracts from a contract.
* In solidity this is the way to create a contract from a contract of the
* same class
*/
contract MiniMeTokenFactory is TokenFactory {
/**
* @notice Update the DApp by creating a new token with new functionalities
* the msg.sender becomes the controller of this clone token
* @param _parentToken Address of the token being cloned
* @param _snapshotBlock Block of the parent token that will
* determine the initial distribution of the clone token
* @param _tokenName Name of the new token
* @param _decimalUnits Number of decimals of the new token
* @param _tokenSymbol Token Symbol for the new token
* @param _transfersEnabled If true, tokens will be able to be transferred
* @return The address of the new token contract
*/
function createCloneToken(
address _parentToken,
uint _snapshotBlock,
string memory _tokenName,
uint8 _decimalUnits,
string memory _tokenSymbol,
bool _transfersEnabled
) public returns (address payable) {
MiniMeToken newToken = new MiniMeToken(
address(this),
_parentToken,
_snapshotBlock,
_tokenName,
_decimalUnits,
_tokenSymbol,
_transfersEnabled
);
newToken.changeController(msg.sender);
return address(newToken);
}
}

108
contracts/token/MiniMeTokenInterface.sol Normal file
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@ -0,0 +1,108 @@
pragma solidity ^0.5.7;
import "./ERC20Token.sol";
contract MiniMeTokenInterface is ERC20Token {
/**
* @notice `msg.sender` approves `_spender` to send `_amount` tokens on
* its behalf, and then a function is triggered in the contract that is
* being approved, `_spender`. This allows users to use their tokens to
* interact with contracts in one function call instead of two
* @param _spender The address of the contract able to transfer the tokens
* @param _amount The amount of tokens to be approved for transfer
* @return True if the function call was successful
*/
function approveAndCall(
address _spender,
uint256 _amount,
bytes memory _extraData
)
public
returns (bool success);
/**
* @notice Creates a new clone token with the initial distribution being
* this token at `_snapshotBlock`
* @param _cloneTokenName Name of the clone token
* @param _cloneDecimalUnits Number of decimals of the smallest unit
* @param _cloneTokenSymbol Symbol of the clone token
* @param _snapshotBlock Block when the distribution of the parent token is
* copied to set the initial distribution of the new clone token;
* if the block is zero than the actual block, the current block is used
* @param _transfersEnabled True if transfers are allowed in the clone
* @return The address of the new MiniMeToken Contract
*/
function createCloneToken(
string memory _cloneTokenName,
uint8 _cloneDecimalUnits,
string memory _cloneTokenSymbol,
uint _snapshotBlock,
bool _transfersEnabled
)
public
returns(address);
/**
* @notice Generates `_amount` tokens that are assigned to `_owner`
* @param _owner The address that will be assigned the new tokens
* @param _amount The quantity of tokens generated
* @return True if the tokens are generated correctly
*/
function generateTokens(
address _owner,
uint _amount
)
public
returns (bool);
/**
* @notice Burns `_amount` tokens from `_owner`
* @param _owner The address that will lose the tokens
* @param _amount The quantity of tokens to burn
* @return True if the tokens are burned correctly
*/
function destroyTokens(
address _owner,
uint _amount
)
public
returns (bool);
/**
* @notice Enables token holders to transfer their tokens freely if true
* @param _transfersEnabled True if transfers are allowed in the clone
*/
function enableTransfers(bool _transfersEnabled) public;
/**
* @notice This method can be used by the controller to extract mistakenly
* sent tokens to this contract.
* @param _token The address of the token contract that you want to recover
* set to 0 in case you want to extract ether.
*/
function claimTokens(address _token) public;
/**
* @dev Queries the balance of `_owner` at a specific `_blockNumber`
* @param _owner The address from which the balance will be retrieved
* @param _blockNumber The block number when the balance is queried
* @return The balance at `_blockNumber`
*/
function balanceOfAt(
address _owner,
uint _blockNumber
)
public
view
returns (uint);
/**
* @notice Total amount of tokens at a specific `_blockNumber`.
* @param _blockNumber The block number when the totalSupply is queried
* @return The total amount of tokens at `_blockNumber`
*/
function totalSupplyAt(uint _blockNumber) public view returns(uint);
}

33
contracts/token/TokenController.sol Normal file
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@ -0,0 +1,33 @@
pragma solidity ^0.5.7;
/**
* @dev The token controller contract must implement these functions
*/
interface TokenController {
/**
* @notice Called when `_owner` sends ether to the MiniMe Token contract
* @param _owner The address that sent the ether to create tokens
* @return True if the ether is accepted, false if it throws
*/
function proxyPayment(address _owner) external payable returns(bool);
/**
* @notice Notifies the controller about a token transfer allowing the
* controller to react if desired
* @param _from The origin of the transfer
* @param _to The destination of the transfer
* @param _amount The amount of the transfer
* @return False if the controller does not authorize the transfer
*/
function onTransfer(address _from, address _to, uint _amount) external returns(bool);
/**
* @notice Notifies the controller about an approval allowing the
* controller to react if desired
* @param _owner The address that calls `approve()`
* @param _spender The spender in the `approve()` call
* @param _amount The amount in the `approve()` call
* @return False if the controller does not authorize the approval
*/
function onApprove(address _owner, address _spender, uint _amount) external
returns(bool);
}

12
contracts/token/TokenFactory.sol Normal file
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@ -0,0 +1,12 @@
pragma solidity ^0.5.7;
contract TokenFactory {
function createCloneToken(
address _parentToken,
uint _snapshotBlock,
string memory _tokenName,
uint8 _decimalUnits,
string memory _tokenSymbol,
bool _transfersEnabled
) public returns (address payable);
}

5
embark.json
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@ -10,11 +10,12 @@
"config": "config/",
"versions": {
"web3": "1.0.0-beta",
"solc": "0.5.0",
"solc": "0.5.8",
"ipfs-api": "17.2.4"
},
"plugins": {
"embarkjs-connector-web3": {}
"embarkjs-connector-web3": {},
"embark-solc": {}
},
"options": {
"solc": {

4
package.json
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@ -9,9 +9,11 @@
"author": "",
"license": "MIT",
"devDependencies": {
"embarkjs-connector-web3": "^4.1.0-beta.3"
"embarkjs-connector-web3": "^4.1.0-beta.3",
"embark-solc": "^4.0.2"
},
"dependencies": {
"embark": "^4.0.2",
"openzeppelin-solidity": "^2.3.0"
}
}

27
test/stakingPool_spec.js
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@ -7,8 +7,24 @@ let iuri, jonathan, richard;
// For documentation please see https://embark.status.im/docs/contracts_testing.html
config({
contracts: {
"StakingPool": {args: ["$SNT"]},
"SNT": {}
"MiniMeToken": { "deploy": false },
"MiniMeTokenFactory": {
},
"SNT": {
"instanceOf": "MiniMeToken",
"args": [
"$MiniMeTokenFactory",
"0x0000000000000000000000000000000000000000",
0,
"TestMiniMeToken",
18,
"STT",
true
]
},
"StakingPool": {
"args": ["$SNT"]
}
}
}, (_err, accounts) => {
iuri = accounts[0];
@ -23,6 +39,7 @@ contract("StakingPool", function () {
before(async () => {
// distribute SNT
await SNT.methods.generateTokens(iuri, "10000000000000000000000").send({from: iuri});
await SNT.methods.transfer(jonathan, "1000000000000000000000").send({from: iuri});
await SNT.methods.transfer(richard, "1000000000000000000000").send({from: iuri});
@ -30,7 +47,7 @@ contract("StakingPool", function () {
let balance;
balance = await SNT.methods.balanceOf(iuri).call();
assert.strictEqual(balance, "8000000000000000000000");
await SNT.methods.approve(StakingPool.address, "10000000000000000000000").send({from: iuri});
// TODO: we are not approving here because we want to test the approveAndCall functionality
balance = await SNT.methods.balanceOf(jonathan).call();
assert.strictEqual(balance, "1000000000000000000000");
@ -60,7 +77,9 @@ contract("StakingPool", function () {
describe("depositing before contributions", () => {
before("deposit 11 ETH", async () => {
await StakingPool.methods.deposit("11000000000000000000").send({from: iuri})
// Deposit using approveAndCall
const encodedCall = StakingPool.methods.deposit("11000000000000000000").encodeABI();
await SNT.methods.approveAndCall(StakingPool.options.address, "11000000000000000000", encodedCall).send({from: iuri});
})
it("exchangeRate should remain 1", async function () {

8816
yarn.lock
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