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May 2, 2018 08:46
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pragma solidity ^0.4.0; | |
contract Ballot { | |
struct Voter { | |
uint weight; | |
bool voted; | |
uint8 vote; | |
address delegate; | |
} | |
struct Proposal { | |
uint voteCount; | |
} | |
address chairperson; | |
mapping(address => Voter) voters; | |
Proposal[] proposals; | |
/// Create a new ballot with $(_numProposals) different proposals. | |
function Ballot(uint8 _numProposals) public { | |
chairperson = msg.sender; | |
voters[chairperson].weight = 1; | |
proposals.length = _numProposals; | |
} | |
/// Give $(toVoter) the right to vote on this ballot. | |
/// May only be called by $(chairperson). | |
function giveRightToVote(address toVoter) public { | |
if (msg.sender != chairperson || voters[toVoter].voted) return; | |
voters[toVoter].weight = 1; | |
} | |
/// Delegate your vote to the voter $(to). | |
function delegate(address to) public { | |
Voter storage sender = voters[msg.sender]; // assigns reference | |
if (sender.voted) return; | |
while (voters[to].delegate != address(0) && voters[to].delegate != msg.sender) | |
to = voters[to].delegate; | |
if (to == msg.sender) return; | |
sender.voted = true; | |
sender.delegate = to; | |
Voter storage delegateTo = voters[to]; | |
if (delegateTo.voted) | |
proposals[delegateTo.vote].voteCount += sender.weight; | |
else | |
delegateTo.weight += sender.weight; | |
} | |
/// Give a single vote to proposal $(toProposal). | |
function vote(uint8 toProposal) public { | |
Voter storage sender = voters[msg.sender]; | |
if (sender.voted || toProposal >= proposals.length) return; | |
sender.voted = true; | |
sender.vote = toProposal; | |
proposals[toProposal].voteCount += sender.weight; | |
} | |
function winningProposal() public constant returns (uint8 _winningProposal) { | |
uint256 winningVoteCount = 0; | |
for (uint8 prop = 0; prop < proposals.length; prop++) | |
if (proposals[prop].voteCount > winningVoteCount) { | |
winningVoteCount = proposals[prop].voteCount; | |
_winningProposal = prop; | |
} | |
} | |
} |
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pragma solidity ^0.4.0; | |
contract Testie { | |
} | |
contract Ballot { | |
uint _duration; | |
uint _startTime; | |
struct Proposal { | |
string description; | |
string title; | |
uint voteCount; | |
address targetAddress; | |
} | |
event log (string _msg); | |
address chairperson; | |
mapping(address => mapping (address => uint8)) voters; // map between proposal and voter and votes | |
mapping(address => Proposal) public proposals; | |
address[] public proposalsSender; | |
/// Create a new ballot with $(_numProposals) different proposals. | |
function Ballot(uint duration, uint startTime) public { | |
chairperson = msg.sender; | |
_duration = duration; | |
_startTime = startTime; | |
} | |
// duration issues... | |
// add a new proposals | |
function addProposal(string desc, string title, address targetAddr) public { | |
if (targetAddr == 0x0000000000000000000000000000000000000000){ | |
revert(); | |
} | |
proposals[msg.sender].description = desc; | |
proposals[msg.sender].title = title; | |
proposals[msg.sender].voteCount = 0; | |
proposals[msg.sender].targetAddress = targetAddr; | |
proposalsSender.push(msg.sender); | |
} | |
/// Give a single vote to proposal $(toProposal). | |
function vote(address proposal) public { | |
// is this msg.sender in vote - the voter the proposal or the owner of the contract? | |
// apparantly you can't vote more than once | |
uint8 vote = voters[proposal][msg.sender]; | |
// the revert - takes it back to the initial state - but that blows away everyting - I suppose... | |
// check on revert(); | |
if (timeOut()) revert(); | |
if (vote != 0) { | |
revert(); // already voted for this proposal | |
} else { | |
voters[proposal][msg.sender] = 1; | |
proposals[proposal].voteCount += 1; | |
} | |
} | |
// timeOut vs duration in voteCount | |
// for use in vote(), addProposal(), | |
function timeOut() public returns ( bool timeOver) { | |
if (_startTime + _duration > now){ | |
timeOver = false; | |
}else timeOver = true; | |
} | |
function winningProposal() public constant returns (address currLeader) { | |
// does this need to be run only by the contract owner? Currently I think it is not limited | |
uint vote = 0; | |
if (timeOut()){ | |
// timeOut - mean that at least the _duration is over | |
// what if there is tie? | |
if(proposalsSender.length > 0) { | |
for (uint8 k = 0; k < proposalsSender.length; k++) { | |
Proposal proposal = proposals[proposalsSender[k]]; | |
if (vote < proposal.voteCount) { | |
vote = proposal.voteCount; | |
currLeader = proposal.targetAddress; | |
} | |
} | |
if (vote > 0) { | |
return currLeader; | |
}else{ | |
log("aint no voters!"); | |
} | |
}else{ | |
log("aint no proposals!"); | |
} | |
} | |
} | |
} |
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pragma solidity ^0.4.18; | |
import "./ERC20Basic.sol"; | |
import "./SafeMath.sol"; | |
/** | |
* @title Basic token | |
* @dev Basic version of StandardToken, with no allowances. | |
*/ | |
contract BasicToken is ERC20Basic { | |
using SafeMath for uint256; | |
mapping(address => uint256) balances; | |
uint256 totalSupply_; | |
/** | |
* @dev total number of tokens in existence | |
*/ | |
function totalSupply() public view returns (uint256) { | |
return totalSupply_; | |
} | |
/** | |
* @dev transfer token for a specified address | |
* @param _to The address to transfer to. | |
* @param _value The amount to be transferred. | |
*/ | |
function transfer(address _to, uint256 _value, uint256 _misc) public returns (bool) { | |
require(_to != address(0)); | |
require(_value <= balances[msg.sender]); | |
// SafeMath.sub will throw if there is not enough balance. | |
balances[msg.sender] = balances[msg.sender].sub(_value); | |
balances[_to] = balances[_to].add(_value); | |
Transfer(msg.sender, _to, _value); | |
return true; | |
} | |
/** | |
* @dev Gets the balance of the specified address. | |
* @param _owner The address to query the the balance of. | |
* @return An uint256 representing the amount owned by the passed address. | |
*/ | |
function balanceOf(address _owner) public view returns (uint256 balance) { | |
return balances[_owner]; | |
} | |
} |
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pragma solidity ^0.4.17; | |
import './UnlockVault.sol'; | |
contract CarbonLoan is UnlockVault { | |
event LoanIssued(uint id); | |
event NewDebtor(uint id); | |
uint public availableFund; | |
struct DebtorStruct { | |
uint registryID; | |
//address[] loan_cosigners; //Distributor co-sign the loan to payback on the debtor behalf | |
uint numloans; | |
uint owe; | |
uint paid; | |
bool canborrow; | |
} | |
mapping (address => DebtorStruct) public debtors; | |
address[] public DebtorIndexes; | |
function isRegisteredDebtor(address debtor_address) public constant returns(bool isIndeed) { | |
if (DebtorIndexes.length == 0) return false; | |
return (DebtorIndexes[debtors[debtor_address].registryID] == debtor_address); | |
} | |
function newDebtorSignup(address _debtorAddress) public { | |
if (_debtorAddress == address(0)) revert(); | |
if (isRegisteredDebtor(msg.sender)) revert(); | |
debtors[_debtorAddress].registryID = DebtorIndexes.push(msg.sender) - 1 ; | |
debtors[_debtorAddress].numloans = 0; | |
debtors[_debtorAddress].owe = 0; | |
debtors[_debtorAddress].paid = 0; | |
debtors[_debtorAddress].canborrow = true; | |
NewDebtor(debtors[_debtorAddress].registryID); | |
} | |
function approveloan(address debtor_address) public onlyOpenAddress returns (bool success){ | |
if (!isRegisteredDebtor(debtor_address)) revert(); | |
//uint registryID = DebtorIndexes[debtor_address]; | |
// uint owe = debtors[debtor_address].owe; | |
// uint paid = debtors[debtor_address].paid; | |
bool canborrow = debtors[debtor_address].canborrow; | |
if (! canborrow) return false; | |
increaseApproval(msg.sender, 5); | |
transferFrom(msg.sender, debtor_address, 5); | |
availableFund = availableFund - 5; | |
LoanIssued(debtors[debtor_address].registryID); | |
return true; | |
} | |
} |
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{"web":{"client_id":"113114929943-53mo1og7jsjhg9kbts9job33qq5i3cpn.apps.googleusercontent.com","project_id":"resonant-cairn-162921","auth_uri":"https://accounts.google.com/o/oauth2/auth","token_uri":"https://accounts.google.com/o/oauth2/token","auth_provider_x509_cert_url":"https://www.googleapis.com/oauth2/v1/certs","client_secret":"NC4QsX3EILwmmDnGgcd2Hpj8","redirect_uris":["https://staging.ethereumfoundation.org/devcon3/wp-admin/options-general.php?page=gmail-smtp-settings&action=oauth_grant"]}} |
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pragma solidity ^0.4.18; | |
import "./ERC20Basic.sol"; | |
/** | |
* @title ERC20 interface | |
* @dev see https://github.com/ethereum/EIPs/issues/20 | |
*/ | |
contract ERC20 is ERC20Basic { | |
function allowance(address owner, address spender) public view returns (uint256); | |
function transferFrom(address from, address to, uint256 value) public returns (bool); | |
function approve(address spender, uint256 value) public returns (bool); | |
event Approval(address indexed owner, address indexed spender, uint256 value); | |
} |
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pragma solidity ^0.4.18; | |
/** | |
* @title ERC20Basic | |
* @dev Simpler version of ERC20 interface | |
* @dev see https://github.com/ethereum/EIPs/issues/179 | |
*/ | |
contract ERC20Basic { | |
function totalSupply() public view returns (uint256); | |
function balanceOf(address who) public view returns (uint256); | |
function transfer(address to, uint256 value) public returns (bool); | |
event Transfer(address indexed from, address indexed to, uint256 value); | |
} |
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pragma solidity ^0.4.19; | |
contract Hodor { | |
string public greeting; | |
function Hodor(string _greeting){ | |
greeting = _greeting; | |
} | |
function setGreeting(string _greeting){ | |
greeting = _greeting; | |
} | |
} |
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pragma solidity ^0.4.17; | |
contract Migrations { | |
address public owner; | |
uint public last_completed_migration; | |
modifier restricted() { | |
if (msg.sender == owner) _; | |
} | |
function Migrations() public { | |
owner = msg.sender; | |
} | |
function setCompleted(uint completed) public restricted { | |
last_completed_migration = completed; | |
} | |
function upgrade(address new_address) public restricted { | |
Migrations upgraded = Migrations(new_address); | |
upgraded.setCompleted(last_completed_migration); | |
} | |
} |
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pragma solidity ^0.4.18; | |
/** | |
* @title Ownable | |
* @dev The Ownable contract has an owner address, and provides basic authorization control | |
* functions, this simplifies the implementation of "user permissions". | |
*/ | |
contract Ownable { | |
address public owner; | |
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); | |
/** | |
* @dev The Ownable constructor sets the original `owner` of the contract to the sender | |
* account. | |
*/ | |
function Ownable() public { | |
owner = msg.sender; | |
} | |
/** | |
* @dev Throws if called by any account other than the owner. | |
*/ | |
modifier onlyOwner() { | |
require(msg.sender == owner); | |
_; | |
} | |
/** | |
* @dev Allows the current owner to transfer control of the contract to a newOwner. | |
* @param newOwner The address to transfer ownership to. | |
*/ | |
function transferOwnership(address newOwner) public onlyOwner { | |
require(newOwner != address(0)); | |
OwnershipTransferred(owner, newOwner); | |
owner = newOwner; | |
} | |
} |
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pragma solidity ^0.4.16; | |
contract OwnedToken { | |
// TokenCreator is a contract type that is defined below. | |
// It is fine to reference it as long as it is not used | |
// to create a new contract. | |
TokenCreator creator; | |
address owner; | |
bytes32 name; | |
// This is the constructor which registers the | |
// creator and the assigned name. | |
function OwnedToken(bytes32 _name) public { | |
// State variables are accessed via their name | |
// and not via e.g. this.owner. This also applies | |
// to functions and especially in the constructors, | |
// you can only call them like that ("internally"), | |
// because the contract itself does not exist yet. | |
owner = msg.sender; | |
// We do an explicit type conversion from `address` | |
// to `TokenCreator` and assume that the type of | |
// the calling contract is TokenCreator, there is | |
// no real way to check that. | |
creator = TokenCreator(msg.sender); | |
name = _name; | |
} | |
function changeName(bytes32 newName) public { | |
// Only the creator can alter the name -- | |
// the comparison is possible since contracts | |
// are implicitly convertible to addresses. | |
if (msg.sender == address(creator)) | |
name = newName; | |
} | |
function transfer(address newOwner) public { | |
// Only the current owner can transfer the token. | |
if (msg.sender != owner) return; | |
// We also want to ask the creator if the transfer | |
// is fine. Note that this calls a function of the | |
// contract defined below. If the call fails (e.g. | |
// due to out-of-gas), the execution here stops | |
// immediately. | |
if (creator.isTokenTransferOK(owner, newOwner)) | |
owner = newOwner; | |
} | |
} | |
contract TokenCreator { | |
function createToken(bytes32 name) | |
public | |
returns (OwnedToken tokenAddress) | |
{ | |
// Create a new Token contract and return its address. | |
// From the JavaScript side, the return type is simply | |
// `address`, as this is the closest type available in | |
// the ABI. | |
return new OwnedToken(name); | |
} | |
function changeName(OwnedToken tokenAddress, bytes32 name) public { | |
// Again, the external type of `tokenAddress` is | |
// simply `address`. | |
tokenAddress.changeName(name); | |
} | |
function isTokenTransferOK(address currentOwner, address newOwner) | |
public | |
view | |
returns (bool ok) | |
{ | |
// Check some arbitrary condition. | |
address tokenAddress = msg.sender; | |
return (keccak256(newOwner) & 0xff) == (bytes20(tokenAddress) & 0xff); | |
} | |
} |
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pragma solidity ^0.4.18; | |
/** | |
* @title SafeMath | |
* @dev Math operations with safety checks that throw on error | |
*/ | |
library SafeMath { | |
/** | |
* @dev Multiplies two numbers, throws on overflow. | |
*/ | |
function mul(uint256 a, uint256 b) internal pure returns (uint256) { | |
if (a == 0) { | |
return 0; | |
} | |
uint256 c = a * b; | |
assert(c / a == b); | |
return c; | |
} | |
/** | |
* @dev Integer division of two numbers, truncating the quotient. | |
*/ | |
function div(uint256 a, uint256 b) internal pure returns (uint256) { | |
// assert(b > 0); // Solidity automatically throws when dividing by 0 | |
uint256 c = a / b; | |
// assert(a == b * c + a % b); // There is no case in which this doesn't hold | |
return c; | |
} | |
/** | |
* @dev Substracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend). | |
*/ | |
function sub(uint256 a, uint256 b) internal pure returns (uint256) { | |
assert(b <= a); | |
return a - b; | |
} | |
/** | |
* @dev Adds two numbers, throws on overflow. | |
*/ | |
function add(uint256 a, uint256 b) internal pure returns (uint256) { | |
uint256 c = a + b; | |
assert(c >= a); | |
return c; | |
} | |
} |
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pragma solidity ^0.4.18; | |
import './StandardToken.sol'; | |
import './Ownable.sol'; | |
/** | |
* @title Mintable token | |
* @dev Simple ERC20 Token example, with mintable token creation | |
* @dev Issue: * https://github.com/OpenZeppelin/zeppelin-solidity/issues/120 | |
* Based on code by TokenMarketNet: https://github.com/TokenMarketNet/ico/blob/master/contracts/MintableToken.sol | |
*/ | |
contract SOMCoin is StandardToken, Ownable { | |
event Mint(address indexed to, uint256 amount); | |
event MintFinished(); | |
bool public mintingFinished = false; | |
modifier canMint() { | |
require(!mintingFinished); | |
_; | |
} | |
/** | |
* @dev Function to mint tokens | |
* @param _to The address that will receive the minted tokens. | |
* @param _amount The amount of tokens to mint. | |
* @return A boolean that indicates if the operation was successful. | |
*/ | |
function mint(address _to, uint256 _amount) onlyOwner canMint public returns (bool) { | |
totalSupply_ = totalSupply_.add(_amount); | |
balances[_to] = balances[_to].add(_amount); | |
Mint(_to, _amount); | |
allowance(msg.sender, msg.sender); | |
Transfer(address(0), _to, _amount); | |
return true; | |
} | |
/** | |
* @dev Function to stop minting new tokens. | |
* @return True if the operation was successful. | |
*/ | |
function finishMinting() onlyOwner canMint public returns (bool) { | |
mintingFinished = true; | |
MintFinished(); | |
return true; | |
} | |
} |
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pragma solidity ^0.4.18; | |
import "./BasicToken.sol"; | |
import "./ERC20.sol"; | |
/** | |
* @title Standard ERC20 token | |
* | |
* @dev Implementation of the basic standard token. | |
* @dev https://github.com/ethereum/EIPs/issues/20 | |
* @dev Based on code by FirstBlood: https://github.com/Firstbloodio/token/blob/master/smart_contract/FirstBloodToken.sol | |
*/ | |
contract StandardToken is ERC20, BasicToken { | |
mapping (address => mapping (address => uint256)) internal allowed; | |
/** | |
* @dev Transfer tokens from one address to another | |
* @param _from address The address which you want to send tokens from | |
* @param _to address The address which you want to transfer to | |
* @param _value uint256 the amount of tokens to be transferred | |
*/ | |
function transferFrom(address _from, address _to, uint256 _value) public returns (bool) { | |
require(_to != address(0)); | |
require(_value <= balances[_from]); | |
require(_value <= allowed[_from][msg.sender]); | |
balances[_from] = balances[_from].sub(_value); | |
balances[_to] = balances[_to].add(_value); | |
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value); | |
Transfer(_from, _to, _value); | |
return true; | |
} | |
/** | |
* @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender. | |
* | |
* Beware that changing an allowance with this method brings the risk that someone may use both the old | |
* and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this | |
* race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards: | |
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 | |
* @param _spender The address which will spend the funds. | |
* @param _value The amount of tokens to be spent. | |
*/ | |
function approve(address _spender, uint256 _value) public returns (bool) { | |
allowed[msg.sender][_spender] = _value; | |
Approval(msg.sender, _spender, _value); | |
return true; | |
} | |
/** | |
* @dev Function to check the amount of tokens that an owner allowed to a spender. | |
* @param _owner address The address which owns the funds. | |
* @param _spender address The address which will spend the funds. | |
* @return A uint256 specifying the amount of tokens still available for the spender. | |
*/ | |
function allowance(address _owner, address _spender) public view returns (uint256) { | |
return allowed[_owner][_spender]; | |
} | |
/** | |
* @dev Increase the amount of tokens that an owner allowed to a spender. | |
* | |
* approve should be called when allowed[_spender] == 0. To increment | |
* allowed value is better to use this function to avoid 2 calls (and wait until | |
* the first transaction is mined) | |
* From MonolithDAO Token.sol | |
* @param _spender The address which will spend the funds. | |
* @param _addedValue The amount of tokens to increase the allowance by. | |
*/ | |
function increaseApproval(address _spender, uint _addedValue) public returns (bool) { | |
allowed[msg.sender][_spender] = allowed[msg.sender][_spender].add(_addedValue); | |
Approval(msg.sender, _spender, allowed[msg.sender][_spender]); | |
return true; | |
} | |
/** | |
* @dev Decrease the amount of tokens that an owner allowed to a spender. | |
* | |
* approve should be called when allowed[_spender] == 0. To decrement | |
* allowed value is better to use this function to avoid 2 calls (and wait until | |
* the first transaction is mined) | |
* From MonolithDAO Token.sol | |
* @param _spender The address which will spend the funds. | |
* @param _subtractedValue The amount of tokens to decrease the allowance by. | |
*/ | |
function decreaseApproval(address _spender, uint _subtractedValue) public returns (bool) { | |
uint oldValue = allowed[msg.sender][_spender]; | |
if (_subtractedValue > oldValue) { | |
allowed[msg.sender][_spender] = 0; | |
} else { | |
allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue); | |
} | |
Approval(msg.sender, _spender, allowed[msg.sender][_spender]); | |
return true; | |
} | |
} |
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pragma solidity ^0.4.18; | |
contract Testie { | |
} | |
contract Coursetro { | |
string fName; | |
uint age; | |
uint size; | |
string suit; | |
string _desc; | |
function Coursetro (string desc) public payable{ | |
_desc = desc; | |
} | |
function setInstructor(string _fName, uint _age, uint[2] _stuff) public { | |
fName = _fName; | |
age = _age; | |
} | |
function setSuit(string _suit, uint _size) public { | |
suit = _suit; | |
size = _size; | |
} | |
function setSuits(string _suit, uint _size) public { | |
suit = _suit; | |
size = _size; | |
} | |
function getInstructor2() public constant returns (string, uint, string) { | |
return (fName, age, _desc); | |
} | |
function getInstructor(string some1, uint some3) public constant returns (string, uint, string) { | |
return (fName, age, _desc); | |
} | |
} |
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pragma solidity ^0.4.17; | |
import './Ownable.sol'; | |
import './SOMCoin.sol'; | |
contract UnlockVault is Ownable, SOMCoin { | |
uint public availableFund = 0; | |
event declareAvailable(uint aF); | |
event addAsset(string name); | |
struct CarbonAsset { | |
uint registryID; | |
string assetName; | |
uint carbonAsset; | |
} | |
CarbonAsset[] public carbonAssets; | |
address public openAddress; | |
function addOpenAddress(address _openAddress) public onlyOwner { | |
allowance(_openAddress, _openAddress); | |
openAddress = _openAddress; | |
} | |
function getAvailableFund() public view{ | |
declareAvailable(availableFund); | |
} | |
modifier onlyOpenAddress() { | |
require(msg.sender == openAddress); | |
_; | |
} | |
function unlock_reserve(string _assetName, uint _carbonAsset) public onlyOwner { | |
carbonAssets.push(CarbonAsset(carbonAssets.length, _assetName, _carbonAsset)); | |
availableFund = availableFund + _carbonAsset; | |
increaseApproval(msg.sender, _carbonAsset); | |
transferFrom(msg.sender, openAddress, _carbonAsset ); | |
addAsset(_assetName); | |
} | |
} |
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