Ethereum ERC20 Token sale for the Veredictum anti-piracy platform on distributed technology.
This contract is written in order to raise an inital fund of ether in exchange for ERC20 tokens which will have utility value upon the Veredictum platform.
All funds are held in the contract as escrow until the ICO is conditionally successful allowing for the funds to be removed into the fund wallet.
Contributors of a failed fund raising will be able claim a refund of the amount of ether they have contributed.
The fund raising period is from the configured start date upto 28 days. The contract may accept pre-funds from KYC'ed addresses in the period between deployment and the start date up to the limit of the maximum funding cap.
Non-KYC addresses may fund up to the juristictional regulated maximum equivilent of $10,000USD.
Bonus tokens will be generated at the following funding tranches per transaction.
| Contributed | Bonus Tokens |
|---|---|
| $2,000,000 | 35% |
| $500,000 | 30% |
| $100,000 | 20% |
| $25,000 | 15% |
| $10,000 | 10% |
| $5,000 | 5% |
The ICO fund raising has a minimum cap of $2,000,000USD and maximum of $20,000,000USD with a base conversion ratio of 3 VNT tokens per US dollar.
ETH/USD calculations are at the rate given at deployment.
The ICO will only be considered successful if the funds raised exceed the minimum cap and those funds have been swept to the FUND_WALLET.
Owners of an ICO which has raised minimum funds may call finalizeICO() before the end date is reached which sets icoSuccessful to true. No further ether deposits will be accepted by the contract.
ERC20 token transfers are prevented until the ICO is successful.
The ICO will be considered failed if the minimum cap has not been reach by the 29th day or the owner has aborted the ICO.
In the event of a failed ICO, the ether contributed can be recovered unto the funders address using the refund(address) function.
It may be called by anyone on the condition the fund has failed.
If a security issue arrises during the time of funding and up until funds are swept to the fund wallet, the owner can call abort(). This will force the ICO to fail and allow refunds to be enacted.
The contract parameters are hard coded and must be updated before compilation and depolyment.
The constructor takes no arguments. Some protection against invalid parameters is coded into the constructor. If the contract fails to deploy, it may be because of an invalid configuration.
- Audit predeployed fund wallet and address.
- Copy and paste the fund wallet address to
FUND_WALLETconstant inVentanaTokenConfig. - Replace
USD_PER_ETH = 0with the market price at time of configuration ofVentanaTokenConfig. - Optionally replace
owner = msg.senderwith an alternative audited address if the deploying account is not to be the owner. - Check all parameters of
VentanaTokenConfigare correct. - Compile and deploy by prefered method.
- Verify the deployed contract on
etherscan.io. - Audit the verified contract's getters.
- Owner and parties Watch the contract in their preferred wallets.
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Release Notes
-------------
0.0.10
* remove `constant` from FUND_WALLET declaration as assigning `msg.sender` is
not compile time constant.
* redeclared FUND_WALLET to `address public fundWallet`
* `fundSucceeded()` returns true on `etherRaised >= MIN_ETH_FUND` instead of
waiting for `END_DATE`
The ICO configuration is by way of precompiled constants. At a minimum, FUND_WALLET and USD_PER_ETH are required to be edited with correct values.
contract VentanaTokenConfig
{
// ERC20 trade name and symbol
string public name = "Ventana";
string public symbol = "VNT";
// Owner has power to abort, discount addresses, sweep successful funds,
// change owner, sweep alien tokens.
address public owner = msg.sender;
// Fund wallet should also be audited prior to deployment
// NOTE: Must be checksummed address!
address public fundWallet = 0x0;
// Tokens awarded per USD contributed
uint public constant TOKENS_PER_USD = 3;
// Ether market price in USD
uint public constant USD_PER_ETH = 0;
// Minimum and maximum target in USD
uint public constant MIN_USD_FUND = 2000000; // $2m
uint public constant MAX_USD_FUND = 20000000; // $20m
// Non-KYC contribution limit in USD
uint public constant KYC_USD_LMT = 10000;
// There will be exactly 300,000,000 tokens regardless of number sold
// Unsold tokens are put into the Strategic Growth token pool
uint public constant MAX_TOKENS = 300000000;
// Funding begins on 14th August 2017
// `+ new Date('14 August 2017 GMT+0')/1000`
uint public constant START_DATE = 1502668800;
// Period for fundraising
uint public constant FUNDING_PERIOD = 28 days;
}
name The Ventana token name "Ventana"
symbol Ventana trade symbol "VNT"
owner The address of the contract owner.
The deployer may wish this address be singularly controlled (rather than multi-sig) to facilite efficient adding of KYC'd addresses or causing an emergency abort. It does not have permissions to control or access funds. Ownership should be handed over to the multisig after a successful ICO.
The owner is permissioned to call:
finalizeICO()On condition the ICO is successfuladdKycAddress()Up until the END_DATEabort()On condition the ICO has not succeededchangeOwner()At any timechangeVeredictum(address _addr)at any time
fundWallet The wallet that raised funds will be swept when finalizeICO() is called after a successful funding.
TOKENS_PER_USD The base number of tokens to be created per US dollar equivilent paid
USD_PER_ETH The ETH/USD market rate at the time of deployment.
This is used for token creation calculations.
MIN_USD_FUND The minimum USD funds required for the ICO to be successful
MAX_USD_FUND The maximum USD funds that can be raised
MAX_TOKENS The total number of tokens that will be in supply
KYC_USD_LMT The USD limit over which Know Your Customer regulations apply.
Funders who are not KYC'd can only contribute up to this amount.
START_DATE The date at which funds will be accepted from non-KYC'ed addresses. KYC'ed addresses can contribute funds before this date.
FUNDING_PERIOD The period after START_DATE until funding closes.
function symbol() public constant returns (string)
Returns the ERC20 trade symbol
function totalSupply() public constant returns (uint)
Returns the total supply of tokens
function balanceOf(address _addr) public constant returns (uint)
Returns the balance of tokens for an address
function allowance(address _owner, address _spender) public constant returns (uint)
Returns the balance of tokens a thridparty may transfer from an address
function transfer(address _to, uint256 _amount) public returns (bool)
Transfers an amount of tokens to a recipient address
Token transfers are blocked until icoSuccessful==true
_to The address of the recipient
_amount The amount of tokens to transfer
Returns success bool
function transferFrom(address _from, address _to, uint256 _amount) public returns (bool)
Transfers and amount of tokens from a third party address to a recipient on the condition it is approved by the third party.
Token transfers are blocked until icoSuccessful==true
_from The holder address of tokens to be sent
_to The address of the recipient
_amount The amount of tokens to transfer
function approve(address _spender, uint256 _amount) public returns (bool)
Approves a spend to transfer an amount of tokens
Approval is blocked until icoSuccessful==true
_spender The address of the approved spender
_amount The amount of tokens the spender is allowed to transfer
function () payable
The default function is payable and calls proxyPurchase(msg.sender)
function fundSucceeded() public constant returns (bool)
Returns true if MIN_FUNDS were raised and the ICO was not aborted
function fundFailed() public constant returns (bool)
Returns true if the ICO was aborted or MIN_FUNDS were not raised before END_DATE.
function icoSuccessful() public constant returns (bool)
Returns true if MIN_FUNDS has been raised and the funds have been sweept to the fund wallet.
Token transfers are blocked until icoSuccessful==true
A successful ICO will reject further ether deposits.
function etherRaised() public constant returns (uint)
Returns the total ether raised during funding
function usdRaised() public constant returns (uint)
Returns the USD equivilent raised for the set ETH/USD rate
function TOKENS_PER_ETH() public constant returns(uint)
Returns the base eth to tokens conversion ratio
function MIN_ETH_FUND() public constant returns (uint)
Returns the minimum ether to be raised for the ICO to not fail
function MAX_ETH_FUND() public constant returns (uint)
Returns the ether value beyond which the ICO will deny further funding.
function KYC_ETH_LMT() public constant returns (uint)
Returns the ether limit above which KYC is required
function START_DATE() public constant returns (uint)
Returns the timestamp after which funding from non-KYC accounts is accepted.
It also determines the END_DATE as START_DATE + FUNDING_PERIOD
function weiToTokens(uint _wei) public constant returns (uint);
Returns token/ether conversion given an ether value (in wei). This calculation includes the following bonus token tranches for levels of USD contributed:
| Contributed | Bonus Tokens |
|---|---|
| $2,000,000 | 35% |
| $500,000 | 30% |
| $100,000 | 20% |
| $25,000 | 15% |
| $10,000 | 10% |
| $5,000 | 5% |
_wei An amount of ether denominated in wei
function kycAddresses(address _addr) public constant returns (bool)
Returns the KYC boolean state for an address
_addr An address
function etherContributed(address _addr) public constant returns (uint)
Return the ether value contributed by an address
_addr An address
function abort() public returns (bool)
The owner can cancel the token sale any time prior to funds being swept into the fund wallet
function proxyPurchase(address _addr) payable returns (bool)
Converts sent ether to a number of tokens which are transferred to_addr on the condition the ICO has neither failed nor succeded.
_addr An address to register tokens against
function addKycAddress(address _addr, bool _kyc) public returns (bool)
Registers or deregisters an address as a known customer (KYC) which allows funds to be contributed above the KYC limit.
_addr An address.
_kyc A boolean KYC state.
function finaliseICO() public returns (bool)
This action will set icoSuccessful to true if fundSucceeded() returns true.
Raised funds are then swept to FUND_WALLET. Tokens are transferrable after this function successfully returns.
function refund(address _addr) public returns (bool);
A token holder can call a refund of contributed ether from a failed ICO
_addr The address of a token holder to refund
function changeOwner(address _newOwner) public returns (bool)
The owner can initiate an ownership change at any time.
The new owner must call acceptOwnership() for ownership to be transferred
_newOwner The new owner address
function acceptOwnership() public returns (bool)
For a potential owner to accept ownership. Required to prove new owner address can call the contract.
changeVeredictum(address _addr) public returns (bool)
Allows the owner to change the Veredictum utility contract the Ventana token contract interacts with.
destroy()
Allows the owner to remove the contract from the blockchain on the condition it has been aborted and the ther balance is 0.
function transferAnyERC20Token(address tokenAddress, uint amount) public returns (bool)
Allows any ERC20 tokens owned by this contract's address to transferred to the owner address
DiscountedAddress(address indexed _addr, uint indexed _tranch);
Triggered when the owner registers an address with a tranched bonus
Refunded(address indexed _addr, uint indexed _value);
Triggered when an account is refunded after a failed ICO
ChangeOwnerTo(address indexed _to);
Triggered when the owner initiates a change of ownership
ChangedOwner(address indexed _from, address indexed _to);
Triggered when a new owner accepts ownership
FundsTransferred(address intexed _wallet, uint indexed _value);
Triggered when raised funds are transferred to the fund wallet. This also indicated that tokens have become transferable
Transfer(address indexed _from, address indexed _to, uint256 _value);
Triggered when tokens have been transferred
Approval(address indexed _owner, address indexed _spender, uint256 _value);
Triggered when a third party sender is approved
Functions must throw on F conditions
Conditional Entry Table (functions must throw on F conditions)
renetry prevention on all public mutating functions Reentry mutex set in moveFundsToWallet(), refund()
| function | <START_DATE | <END_DATE | fundFailed | fundSucceeded | icoSucceeded |
|---|---|---|---|---|---|
| () | KYC | T | F | T | F |
| abort() | T | T | T | T | F |
| proxyPurchase() | KYC | T | F | T | F |
| addKycAddress() | T | T | F | T | T |
| finaliseICO() | F | F | F | T | T |
| refund() | F | F | T | F | F |
| transfer() | F | F | F | F | T |
| transferFrom() | F | F | F | F | T |
| approve() | F | F | F | F | T |
| changeOwner() | T | T | T | T | T |
| acceptOwnership() | T | T | T | T | T |
| changeVeredictum() | T | T | T | T | T |
| destroy() | F | F | !__abortFuse | F | F |
| transferAnyERC20Tokens() | T | T | T | T | T |