BARF ‐ BokkyPooBah Autonomous Refundathon Facility
Table of contents
- Token Information
- Token Contract Information
- Market Making Information
- How To Watch The Token Contract In Ethereum Wallet / Mist
- How To Watch The Token In Ethereum Wallet / Mist
- The Token Contract Source Code
- Website: https://github.com/bokkypoobah/BokkyPooBahsAutonomousRefundathonFacility
- Blog Post: https://www.bokconsulting.com.au/blog/bokkypoobahs-autonomous-refundathon-facility-token-contract/
- Explorer: https://etherscan.io/token/0xcaffa1d66eae19887319ab9aeca5bd9aeb9d2dde
- Exchanges: https://cryptoderivatives.market
- Symbol:
BARF - Name:
BokkyPooBah Autonomous Refundathon Facility - Address:
0xcaffa1d66eae19887319ab9aeca5bd9aeb9d2dde - Decimal places:
18 - Total supply:
1,254(dynamic) - Note: This token contract has been discontinued and replaced by BERP ‐ BokkyPooBah´s Ether Refundable Prize.
If you want to list a BARF TokenTrader contract on https://cryptoderivatives.market, use the TokenTraderFactory contract.
Execute createTradeContract(address asset, uint256 buyPrice, uint256 sellPrice, uint256 units, bool buysTokens, bool sellsTokens) to create your LUN TokenTrader contract.
The formula for working out the buyPrice or sellPrice follows:
rate = price / units * 10^(tokenDecimals - etherDecimals)
which is:
rate = price / units * 10^(tokenDecimals - 18)
and tokenDecimals = 18, so:
rate = price / units
Find your newly created Trade contract on https://cryptoderivatives.market/tokenTraderContracts. Watch this contract address using the ABI at How To Watch A TokenTrader Contract In Ethereum Wallet / Mist.
Use the LUN token contract to transfer your tokens to your newly created TokenTrader address.
Execute your TokenTrader.makerDepositEther() function, sending the amount of ethers.
In Ethereum Wallet / Mist, select the CONTRACTS tab and click WATCH CONTRACT to open the Watch contract window. Then:
-
Under CONTRACT NAME, enter
LUN -
Under CONTRACT ADDRESS, enter
0xcaffa1d66eae19887319ab9aeca5bd9aeb9d2dde -
Copy the Application Binary Interface below and paste it into the JSON INTERFACE text box
[{"constant":true,"inputs":[],"name":"name","outputs":[{"name":"","type":"string"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"_spender","type":"address"},{"name":"_amount","type":"uint256"}],"name":"approve","outputs":[{"name":"success","type":"bool"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"totalSupply","outputs":[{"name":"totalSupply","type":"uint256"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"_from","type":"address"},{"name":"_to","type":"address"},{"name":"_amount","type":"uint256"}],"name":"transferFrom","outputs":[{"name":"success","type":"bool"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"currentTokenBalance","outputs":[{"name":"","type":"uint256"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"decimals","outputs":[{"name":"","type":"uint8"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"amount","type":"uint256"}],"name":"ownerWithdraw","outputs":[],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"sellPrice","outputs":[{"name":"","type":"uint256"}],"payable":false,"type":"function"},{"constant":true,"inputs":[{"name":"_owner","type":"address"}],"name":"balanceOf","outputs":[{"name":"balance","type":"uint256"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"buyPrice","outputs":[{"name":"","type":"uint256"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"owner","outputs":[{"name":"","type":"address"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"symbol","outputs":[{"name":"","type":"string"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"amountOfEthersOwnerCanWithdraw","outputs":[{"name":"","type":"uint256"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"_to","type":"address"},{"name":"_amount","type":"uint256"}],"name":"transfer","outputs":[{"name":"success","type":"bool"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"amountOfTokens","type":"uint256"}],"name":"memberSellToken","outputs":[],"payable":false,"type":"function"},{"constant":false,"inputs":[],"name":"memberBuyToken","outputs":[],"payable":true,"type":"function"},{"constant":true,"inputs":[],"name":"currentEtherBalance","outputs":[{"name":"","type":"uint256"}],"payable":false,"type":"function"},{"constant":true,"inputs":[{"name":"_owner","type":"address"},{"name":"_spender","type":"address"}],"name":"allowance","outputs":[{"name":"remaining","type":"uint256"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"deployedAt","outputs":[{"name":"","type":"uint256"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"payable":false,"type":"function"},{"inputs":[],"payable":false,"type":"constructor"},{"payable":true,"type":"fallback"},{"anonymous":false,"inputs":[{"indexed":false,"name":"amount","type":"uint256"},{"indexed":false,"name":"remainingWithdrawal","type":"uint256"}],"name":"Withdrawn","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"buyer","type":"address"},{"indexed":false,"name":"ethers","type":"uint256"},{"indexed":false,"name":"newEtherBalance","type":"uint256"},{"indexed":false,"name":"tokens","type":"uint256"},{"indexed":false,"name":"newTotalSupply","type":"uint256"},{"indexed":false,"name":"buyPrice","type":"uint256"}],"name":"MemberBoughtToken","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"seller","type":"address"},{"indexed":false,"name":"ethers","type":"uint256"},{"indexed":false,"name":"newEtherBalance","type":"uint256"},{"indexed":false,"name":"tokens","type":"uint256"},{"indexed":false,"name":"newTotalSupply","type":"uint256"},{"indexed":false,"name":"sellPrice","type":"uint256"}],"name":"MemberSoldToken","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"_from","type":"address"},{"indexed":true,"name":"_to","type":"address"},{"indexed":false,"name":"_value","type":"uint256"}],"name":"Transfer","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"_owner","type":"address"},{"indexed":true,"name":"_spender","type":"address"},{"indexed":false,"name":"_value","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"_from","type":"address"},{"indexed":true,"name":"_to","type":"address"}],"name":"OwnershipTransferred","type":"event"}]
-
Click OK
In Ethereum Wallet / Mist, select the CONTRACTS tab and click WATCH TOKEN to open the Add token window. Then:
-
Under TOKEN CONTRACT ADDRESS, enter
0xcaffa1d66eae19887319ab9aeca5bd9aeb9d2dde. The additional fields should automatically be filled in. -
Click OK
The verified source code can be found at 0xcaffa1d66eae19887319ab9aeca5bd9aeb9d2dde and follows:
pragma solidity ^0.4.8;
// ----------------------------------------------------------------------------------------------
// BokkyPooBah's Autonomous Refundathon Facility Token Contract
//
// A system to incentivise The DAO token holders to withdraw their refunds
//
// Based on Vlad's Safe Token Sale Mechanism Contract
// - https://medium.com/@Vlad_Zamfir/a-safe-token-sale-mechanism-8d73c430ddd1
//
// Enjoy. (c) Bok Consulting Pty Ltd 2017. The MIT Licence.
// ----------------------------------------------------------------------------------------------
contract Owned {
address public owner;
event OwnershipTransferred(address indexed _from, address indexed _to);
function Owned() {
owner = msg.sender;
}
modifier onlyOwner {
if (msg.sender != owner) throw;
_;
}
function transferOwnership(address newOwner) onlyOwner {
OwnershipTransferred(owner, newOwner);
owner = newOwner;
}
}
// ERC Token Standard #20 - https://github.com/ethereum/EIPs/issues/20
contract ERC20Token is Owned {
uint256 _totalSupply = 0;
// Balances for each account
mapping(address => uint256) balances;
// Owner of account approves the transfer of an amount to another account
mapping(address => mapping (address => uint256)) allowed;
// Get the total token supply
function totalSupply() constant returns (uint256 totalSupply) {
totalSupply = _totalSupply;
}
// Get the account balance of another account with address _owner
function balanceOf(address _owner) constant returns (uint256 balance) {
return balances[_owner];
}
// Send _value amount of tokens to address _to
function transfer(address _to, uint256 _amount) returns (bool success) {
if (balances[msg.sender] >= _amount
&& _amount > 0
&& balances[_to] + _amount > balances[_to]) {
balances[msg.sender] -= _amount;
balances[_to] += _amount;
Transfer(msg.sender, _to, _amount);
return true;
} else {
return false;
}
}
// Allow _spender to withdraw from your account, multiple times, up to the _value amount.
// If this function is called again it overwrites the current allowance with _value.
// this function is required for some DEX functionality
function approve(address _spender, uint256 _amount) returns (bool success) {
allowed[msg.sender][_spender] = _amount;
Approval(msg.sender, _spender, _amount);
return true;
}
// Spender of tokens transfer an amount of tokens from the token owner's
// balance to the spender's account. The owner of the tokens must already
// have approve(...)-d this transfer
function transferFrom(
address _from,
address _to,
uint256 _amount
) returns (bool success) {
if (balances[_from] >= _amount
&& allowed[_from][msg.sender] >= _amount
&& _amount > 0
&& balances[_to] + _amount > balances[_to]) {
balances[_from] -= _amount;
allowed[_from][msg.sender] -= _amount;
balances[_to] += _amount;
Transfer(_from, _to, _amount);
return true;
} else {
return false;
}
}
// Returns the amount of tokens approved by the owner that can be transferred
// to the spender's account
function allowance(address _owner, address _spender) constant returns (uint256 remaining) {
return allowed[_owner][_spender];
}
event Transfer(address indexed _from, address indexed _to, uint256 _value);
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
}
contract BokkyPooBahsAutonomousRefundathonFacility is ERC20Token {
// ------ Token information ------
string public constant symbol = "BARF";
string public constant name = "BokkyPooBah Autonomous Refundathon Facility";
uint8 public constant decimals = 18;
uint256 public deployedAt;
function BokkyPooBahsAutonomousRefundathonFacility() {
deployedAt = now;
}
// Members buy tokens from this contract at this price
//
// This is a maximum price that the tokens should be bought for buyers
// can always buy tokens from this contract for this price
//
// Check out the BARF prices on https://cryptoderivatives.market/ to see
// if you can buy these tokens for less than this maximum price
function buyPrice() constant returns (uint256) {
// Members buy tokens initially at 1 BARF = 0.01 ETH
if (now < (deployedAt + 2 days)) {
return 1 * 10**16;
// Price increase to 1 BARF = 0.02 ETH after 2 days and before 1 week
} else if (now < (deployedAt + 7 days)) {
return 2 * 10**16;
// Price increase to 1 BARF = 0.04 ETH after 1 week and before 30 days
} else if (now < (deployedAt + 30 days)) {
return 4 * 10**16;
// Price increase to 1 BARF = 0.06 ETH after 30 days and before 60 days
} else if (now < (deployedAt + 60 days)) {
return 6 * 10**16;
// Price increase to 1 BARF = 0.08 ETH after 60 days and before 90 days
} else if (now < (deployedAt + 90 days)) {
return 8 * 10**16;
// Price increase to 1 BARF = 10 ETH after 90 days and before 365 days (1 year)
} else if (now < (deployedAt + 365 days)) {
return 1 * 10**19;
// Price increase to 1 BARF = 1,000 ETH after 365 days and before 3652 days (10 years)
} else if (now < (deployedAt + 3652 days)) {
return 1 * 10**22;
// Price increase to 1 BARF = 1,000,000 ETH after 3652 days (10 years). Effectively free floating ceiling
} else {
return 1 * 10**24;
}
}
// Members can always sell to the contract at 1 BARF = 0.01 ETH
//
// This is a minimum price that the tokens should sell for as the owner of
// the token can always sell tokens to this contract at this price
//
// Check out the BARF prices on https://cryptoderivatives.market/ to see
// if you can sell these tokens for more than this minimum price
function sellPrice() constant returns (uint256) {
return 10**16;
}
// ------ Owner Withdrawal ------
function amountOfEthersOwnerCanWithdraw() constant returns (uint256) {
uint256 etherBalance = this.balance;
uint256 ethersSupportingTokens = _totalSupply * sellPrice() / 1 ether;
if (etherBalance > ethersSupportingTokens) {
return etherBalance - ethersSupportingTokens;
} else {
return 0;
}
}
function ownerWithdraw(uint256 amount) onlyOwner {
uint256 maxWithdrawalAmount = amountOfEthersOwnerCanWithdraw();
if (amount > maxWithdrawalAmount) {
amount = maxWithdrawalAmount;
}
if (!owner.send(amount)) throw;
Withdrawn(amount, maxWithdrawalAmount - amount);
}
event Withdrawn(uint256 amount, uint256 remainingWithdrawal);
// ------ Member Buy and Sell tokens below ------
function () payable {
memberBuyToken();
}
function memberBuyToken() payable {
if (msg.value > 0) {
uint tokens = msg.value * 1 ether / buyPrice();
_totalSupply += tokens;
balances[msg.sender] += tokens;
MemberBoughtToken(msg.sender, msg.value, this.balance, tokens, _totalSupply,
buyPrice());
}
}
event MemberBoughtToken(address indexed buyer, uint256 ethers, uint256 newEtherBalance,
uint256 tokens, uint256 newTotalSupply, uint256 buyPrice);
function memberSellToken(uint256 amountOfTokens) {
if (amountOfTokens > balances[msg.sender]) throw;
balances[msg.sender] -= amountOfTokens;
_totalSupply -= amountOfTokens;
uint256 ethersToSend = amountOfTokens * sellPrice() / 1 ether;
if (!msg.sender.send(ethersToSend)) throw;
MemberSoldToken(msg.sender, ethersToSend, this.balance, amountOfTokens,
_totalSupply, sellPrice());
}
event MemberSoldToken(address indexed seller, uint256 ethers, uint256 newEtherBalance,
uint256 tokens, uint256 newTotalSupply, uint256 sellPrice);
// ------ Information function ------
function currentEtherBalance() constant returns (uint256) {
return this.balance;
}
function currentTokenBalance() constant returns (uint256) {
return _totalSupply;
}
}