public static object HandleHelperOperation(string operation, params object[] args)
{
switch (operation)
{
case "BalanceOfVestedAddress":
// retrieve the real balance of an address that has been subjected to whitepaper defined vesting period
if (!Helpers.RequireArgumentLength(args, 1))
{
return(false);
}
return(Helpers.BalanceOfVestedAddress((byte[])args[0]));
case "IsPrivateSaleAllocationLocked":
// if the admin method `Administration.AllocatePresalePurchase` is permanently disabled, this method will return
// the timestamp the lock was put in place.
return(Storage.Get(Storage.CurrentContext, StorageKeys.PrivateSaleAllocationLocked()));
case "supportedStandards":
// support NEP-10 by responding to supportedStandards
// https://github.com/neo-project/proposals/blob/master/nep-10.mediawiki
return(ICOTemplate.SupportedStandards());
case "BalanceOfSaleContribution":
if (!Helpers.RequireArgumentLength(args, 1))
{
return(false);
}
return(Helpers.BalanceOfSaleContribution((byte[])args[0]));
}
return(false);
}
/// <summary>
/// Claims unsold tokens
/// </summary>
/// <returns></returns>
public static bool ClaimUnsoldTokens()
{
bool UnsoldTokensClaimed = Storage.Get(Storage.CurrentContext, StorageKeys.UnsoldTokensClaimed()).AsString() == "1";
//This method can only be executed by the admin account, after the public sale, and can only be called once (use UnsoldTokensClaimed() storage item)
if (Helpers.GetBlockTimestamp() >= ICOTemplate.PublicSaleEndTime() && UnsoldTokensClaimed == false && Helpers.VerifyIsAdminAccount())
{
byte[] address = ICOTemplate.AdditionalCompanyTokenFund;
//Get amount remaining
BigInteger amountRemaining = NEP5.CrowdsaleAvailableAmount();
//Add vested amount to account
TokenSale.SetVestingPeriodForAddress(address, "company", amountRemaining);
//Set total supply
Helpers.SetTotalSupply(amountRemaining);
//Set the UnsoldTokensClaimed() storage item so ClaimUnsoldTokens() cannot be called again
Storage.Put(Storage.CurrentContext, StorageKeys.UnsoldTokensClaimed(), "1");
transfer(null, address, amountRemaining);
Runtime.Notify("ClaimUnsoldTokens() tokens allocated", address, amountRemaining);
return(true);
}
return(false);
}
/// <summary>
/// mint tokens is called when a user wishes to purchase tokens
/// </summary>
/// <returns></returns>
public static bool MintTokens()
{
object[] transactionData = Helpers.GetTransactionAndSaleData();
Transaction tx = (Transaction)transactionData[0];
byte[] sender = (byte[])transactionData[1];
byte[] receiver = (byte[])transactionData[2];
ulong receivedNEO = (ulong)transactionData[3];
ulong receivedGAS = (ulong)transactionData[4];
BigInteger whiteListGroupNumber = (BigInteger)transactionData[5];
BigInteger crowdsaleAvailableAmount = (BigInteger)transactionData[6];
BigInteger groupMaximumContribution = (BigInteger)transactionData[7];
BigInteger totalTokensPurchased = (BigInteger)transactionData[8];
BigInteger neoRemainingAfterPurchase = (BigInteger)transactionData[9];
BigInteger gasRemainingAfterPurchase = (BigInteger)transactionData[10];
BigInteger totalContributionBalance = (BigInteger)transactionData[11];
if (Helpers.GetBlockTimestamp() >= ICOTemplate.PublicSaleEndTime())
{
Runtime.Notify("MintTokens() failed. Token Sale is closed.", false);
return(false);
}
if (!CanUserParticipateInSale(transactionData))
{
Runtime.Notify("MintTokens() CanUserParticipate failed", false);
return(false);
}
byte[] lastTransactionHash = Storage.Get(Storage.CurrentContext, StorageKeys.MintTokensLastTX());
if (lastTransactionHash == tx.Hash)
{
// ensure that minTokens doesnt process the same transaction more than once
Runtime.Notify("MintTokens() not processing duplicate tx.Hash", tx.Hash);
return(false);
}
Storage.Put(Storage.CurrentContext, StorageKeys.MintTokensLastTX(), tx.Hash);
Runtime.Notify("MintTokens() receivedNEO / receivedGAS", receivedNEO, receivedGAS);
if (neoRemainingAfterPurchase > 0 || gasRemainingAfterPurchase > 0)
{
// this purchase would have exceed the allowed max supply so we spent what we could and will refund the remainder
refund(sender, neoRemainingAfterPurchase, gasRemainingAfterPurchase);
}
BigInteger senderAmountSubjectToVesting = SubjectToVestingPeriod(sender);
BigInteger newTokenBalance = NEP5.BalanceOf(sender) + totalTokensPurchased + senderAmountSubjectToVesting;
Helpers.SetBalanceOf(sender, newTokenBalance);
Helpers.SetBalanceOfSaleContribution(sender, totalContributionBalance);
Helpers.SetTotalSupply(totalTokensPurchased);
transfer(null, sender, totalTokensPurchased);
return(true);
}
/// <summary>
/// allow an administrator to request the unlocking of founder tokens
/// </summary>
/// <param name="address">founders script hash</param>
/// <param name="roundNumber">1-7</param>
/// <returns></returns>
public static bool UnlockFoundersTokens(byte[] address, int roundNumber)
{
if (address.Length != 20)
{
Runtime.Log("UnlockFoundersTokens() invalid address supplied");
return(false);
}
byte[] roundKey = address.Concat(((BigInteger)roundNumber).AsByteArray());
StorageMap unlockedRounds = Storage.CurrentContext.CreateMap(StorageKeys.FounderTokenUnlockRound());
bool roundPreviouslyUnlocked = unlockedRounds.Get(roundKey).AsBigInteger() > 0;
if (roundPreviouslyUnlocked)
{
Runtime.Log("UnlockFoundersTokens() round already unlocked");
return(false);
}
object[] foundersVestingPeriod = GetCoreTeamVestingSchedule();
uint currentTimestamp = Helpers.GetBlockTimestamp();
int roundIndex = (roundNumber * 2) - 2;
int roundValueIndex = roundIndex + 1;
if (roundIndex < 0)
{
Runtime.Log("UnlockFoundersTokens() invalid round index (<0)");
return(false);
}
uint roundReleaseDate = (uint)foundersVestingPeriod[roundIndex];
BigInteger roundReleaseAmount = (BigInteger)foundersVestingPeriod[roundValueIndex];
if (currentTimestamp < roundReleaseDate)
{
Runtime.Log("UnlockFoundersTokens() not scheduled for release");
return(false);
}
object[] founderKeys = ICOTemplate.MoonlightFounderKeys();
for (int i = 0; i < founderKeys.Length; i++)
{
byte[] founderKey = (byte[])founderKeys[i];
if (founderKey == address)
{
Runtime.Notify("UnlockFoundersTokens() releasing funds. currentTimestamp / roundReleaseDate / roundReleaseAmount", currentTimestamp, roundReleaseDate, roundReleaseAmount);
Helpers.SetBalanceOf(founderKey, NEP5.BalanceOf(founderKey) + roundReleaseAmount); // set new balance for destination account
unlockedRounds.Put(roundKey, "1");
return(true);
}
}
return(false);
}
/// <summary>
/// get the maximum number of LX that can be purchased by groupNumber during the public sale
/// </summary>
/// <param name="groupNumber"></param>
/// <returns></returns>
public static BigInteger GetGroupMaxContribution(BigInteger groupNumber)
{
StorageMap contributionLimits = Storage.CurrentContext.CreateMap(StorageKeys.GroupContributionAmountPrefix());
BigInteger maxContribution = contributionLimits.Get(groupNumber.AsByteArray()).AsBigInteger();
if (maxContribution > 0)
{
return(maxContribution);
}
return(ICOTemplate.MaximumContributionAmount());
}
/// <summary>
/// helper method to retrieve the stored group unlock block height
/// </summary>
/// <param name="groupNumber"></param>
/// <returns></returns>
public static uint GetGroupUnlockTime(BigInteger groupNumber)
{
BigInteger unlockTime = 0;
if (groupNumber <= 0 || groupNumber > 4)
{
return(0);
}
else if (groupNumber > 0 && groupNumber <= 4)
{
unlockTime = (uint)ICOTemplate.PresaleStartTime();
}
return((uint)unlockTime);
}
/// <summary>
/// MintTokensEth is called when a the ETH contribution listener server triggers an Ether receive event
/// </summary>
/// <returns></returns>
public static bool MintTokensEth(string ethAddress, byte[] neoAddress, ulong ethReceived)
{
object[] transactionData = Helpers.GetEthTransactionAndSaleData(ethReceived, ethAddress, neoAddress);
Transaction tx = (Transaction)transactionData[0];
byte[] sender = (byte[])transactionData[1];
byte[] receiver = (byte[])transactionData[2];
BigInteger whiteListGroupNumber = (BigInteger)transactionData[5];
BigInteger crowdsaleAvailableAmount = (BigInteger)transactionData[6];
BigInteger groupMaximumContribution = (BigInteger)transactionData[7];
BigInteger totalTokensPurchased = (BigInteger)transactionData[8] * NEP5.factor;
BigInteger totalContributionBalance = (BigInteger)transactionData[9];
if (!CanETHUserParticipateInSale(transactionData))
{
refundEth(ethAddress, ethReceived);
Runtime.Notify("MintTokensEth() CanUserParticipate failed", false);
return(false);
}
if (Helpers.GetBlockTimestamp() >= ICOTemplate.PublicSaleEndTime())
{
refundEth(ethAddress, ethReceived);
Runtime.Notify("MintTokensEth() failed. Token Sale is closed.", false);
return(false);
}
byte[] lastTransactionHash = Storage.Get(Storage.CurrentContext, StorageKeys.MintTokensEthLastTX());
if (lastTransactionHash == tx.Hash)
{
// ensure that minTokens doesnt process the same transaction more than once
Runtime.Notify("MintTokensEth() not processing duplicate tx.Hash", tx.Hash);
return(false);
}
BigInteger tokenTotalSupply = NEP5.TotalSupply();
Storage.Put(Storage.CurrentContext, StorageKeys.MintTokensEthLastTX(), tx.Hash);
Runtime.Notify("MintTokensEth() receivedETH", ethReceived);
BigInteger senderAmountSubjectToVesting = TokenSale.SubjectToVestingPeriod(sender);
BigInteger newTokenBalance = NEP5.BalanceOf(sender) + totalTokensPurchased + senderAmountSubjectToVesting;
Helpers.SetBalanceOf(sender, newTokenBalance);
Helpers.SetBalanceOfSaleContribution(sender, totalContributionBalance);
Helpers.SetTotalSupply(totalTokensPurchased);
transfer(null, sender, totalTokensPurchased);
return(true);
}
/// <summary>
/// initialise the smart contract for use
/// </summary>
/// <returns></returns>
public static bool InitSmartContract()
{
if (Helpers.ContractInitialised())
{
// contract can only be initialised once
Runtime.Log("InitSmartContract() contract already initialised");
return(false);
}
uint ContractInitTime = Helpers.GetBlockTimestamp();
Storage.Put(Storage.CurrentContext, StorageKeys.ContractInitTime(), ContractInitTime);
// assign pre-allocated tokens to the project
object[] immediateAllocation = ICOTemplate.ImmediateProjectGrowthAllocation();
object[] vestedAllocation = ICOTemplate.VestedProjectGrowthAllocation();
BigInteger immediateProjectAllocationValue = ((ICOTemplate.TokenMaxSupply * (BigInteger)immediateAllocation[0]) / 100) * NEP5.factor;
BigInteger vestedProjectAllocationValue = ((ICOTemplate.TokenMaxSupply * (BigInteger)vestedAllocation[0]) / 100) * NEP5.factor;
Helpers.SetBalanceOf(ICOTemplate.MoonlightProjectKey(), immediateProjectAllocationValue + vestedProjectAllocationValue);
Helpers.SetBalanceOfVestedAmount(ICOTemplate.MoonlightProjectKey(), immediateProjectAllocationValue + vestedProjectAllocationValue);
// lockup a portion of the tokens to be released in the future
uint vestedGrowthReleaseDate = (uint)vestedAllocation[1] + ContractInitTime;
object[] vestedTokenPeriod = new object[] { vestedGrowthReleaseDate, vestedProjectAllocationValue };
StorageMap vestingData = Storage.CurrentContext.CreateMap(StorageKeys.VestedTokenPrefix());
vestingData.Put(ICOTemplate.MoonlightProjectKey(), vestedTokenPeriod.Serialize());
// token allocation to MoonlightFounderKeys - update the total supply to include balance - these funds will be unlocked gradually
BigInteger founderTokenAllocation = ((ICOTemplate.TokenMaxSupply * (BigInteger)ICOTemplate.MoonlightFoundersAllocationPercentage()) / 100) * NEP5.factor;
// token allocated to presale
BigInteger presaleAllocationMaxValue = ((ICOTemplate.TokenMaxSupply * (BigInteger)ICOTemplate.PresaleAllocationPercentage()) / 100) * NEP5.factor;
// update the total supply to reflect the project allocated tokens
BigInteger totalSupply = immediateProjectAllocationValue + vestedProjectAllocationValue + founderTokenAllocation + presaleAllocationMaxValue;
Helpers.SetTotalSupply(totalSupply);
UpdateAdminAddress(ICOTemplate.InitialAdminAccount);
EnableDEXWhitelisting(ICOTemplate.WhitelistDEXListings());
Runtime.Log("InitSmartContract() contract initialisation complete");
return(true);
}
/// <summary>
/// set a vesting schedule, as defined in the whitepaper, for tokens purchased during the presale
/// </summary>
/// <param name="address"></param>
/// <param name="tokenBalance"></param>
/// <returns></returns>
public static bool SetVestingPeriodForAddress(byte[] address, BigInteger tokensPurchased)
{
if (!ICOTemplate.UseTokenVestingPeriod())
{
return(false);
}
if (address.Length != 20)
{
return(false);
}
object[] vestingOne = ICOTemplate.VestingBracketOne();
object[] vestingTwo = ICOTemplate.VestingBracketTwo();
BigInteger bracketOneThreshold = (BigInteger)vestingOne[0] * NEP5.factor;
BigInteger bracketTwoThreshold = (BigInteger)vestingTwo[0] * NEP5.factor;
BigInteger currentAvailableBalance = 0; // how many tokens will be immediately available to the owner
uint currentTimestamp = Helpers.GetContractInitTime();
uint bracketOneReleaseDate = (uint)vestingOne[1] + currentTimestamp;
uint bracketTwoReleaseDate = (uint)vestingTwo[1] + currentTimestamp;
StorageMap vestingData = Storage.CurrentContext.CreateMap(StorageKeys.VestedTokenPrefix());
if (tokensPurchased > bracketTwoThreshold)
{
// user has purchased enough tokens to fall under the second vesting period restriction
// calculate the difference between the bracketOne and bracketTwo thresholds to calculate how much should be released after bracketOne lapses
BigInteger bracketOneReleaseAmount = bracketTwoThreshold - bracketOneThreshold;
// the remainder will be released after the bracket two release date
BigInteger bracketTwoReleaseAmount = tokensPurchased - bracketOneReleaseAmount - bracketOneThreshold;
object[] lockoutTimes = new object[] { bracketOneReleaseDate, bracketOneReleaseAmount, bracketTwoReleaseDate, bracketTwoReleaseAmount };
vestingData.Put(address, lockoutTimes.Serialize());
}
else
{
// user has purchased enough tokens to fall under the first vesting period restriction
// calculate the difference between amount purchased and bracketOne threshold to calculate how much should be released after the bracketOne lapses
BigInteger bracketOneReleaseAmount = tokensPurchased - bracketOneThreshold;
object[] lockoutTimes = new object[] { bracketOneReleaseDate, bracketOneReleaseAmount };
vestingData.Put(address, lockoutTimes.Serialize());
}
// ensure the total amount purchased is saved
Helpers.SetBalanceOf(address, tokensPurchased);
Helpers.SetBalanceOfVestedAmount(address, tokensPurchased);
return(true);
}
/// <summary>
/// retrieve information for the received transaction
/// </summary>
/// <returns>object[] {
/// (Transaction)tx, (byte[])sender, (byte)receiver, ulong receivedNEO, ulong receivedGAS,
/// (BigInteger)whiteListGroupNumber, (BigInteger)crowdsaleAvailableAmount, (BigInteger)groupMaximumContribution
/// (BigInteger)totalTokensPurchased, (BigInteger)neoRemainingAfterPurchase, (BigInteger)gasRemainingAfterPurchase
/// (BigInteger)totalContributionBalance
/// }
/// </returns>
public static object[] GetEthTransactionAndSaleData(ulong receivedETH, string ethAddress, byte[] neoAddress)
{
Transaction tx = (Transaction)ExecutionEngine.ScriptContainer;
byte[] sender = neoAddress;
byte[] receiver = neoAddress;
// only add funds to total received value if receiver is the recipient of the output
Runtime.Notify("GetEthTransactionData() Received ETH Deposit type", receiver);
BigInteger whiteListGroupNumber = KYC.GetWhitelistGroupNumber(sender);
BigInteger crowdsaleAvailableAmount = NEP5.CrowdsaleAvailableAmount();
BigInteger groupMaximumContribution = KYC.GetGroupMaxContribution(whiteListGroupNumber) * NEP5.factor;
BigInteger totalTokensPurchased = 0;
//ETH minimum must be 0.1 eth
if (ICOTemplate.ICOAllowsETH() && receivedETH >= ICOTemplate.EthMinimumContribution())
{
//Get the amount of tokens in exchange for contributed ETH. receivedETH is with 18 decimals so divide by 1000000000000000000.
BigInteger ethTokenValue = receivedETH * ICOTemplate.ICOEthToTokenExchangeRate() / 1000000000000000000;
// there is enough NOS left for this purchase to complete
totalTokensPurchased = ethTokenValue;
// ensure amountAvailable now reflects number of tokens purchased with ETH
}
BigInteger totalContributionBalance = BalanceOfSaleContribution(sender) + (totalTokensPurchased * NEP5.factor);
return(new object[] {
tx, // neo transaction object
sender, // who initiated the transfer
receiver, // who the assets were sent to
ethAddress, // ETH address of contributor
receivedETH, // how many neo were transferred
whiteListGroupNumber, // what whitelist group is the sender in
crowdsaleAvailableAmount, // how many tokens are left to be purchased
groupMaximumContribution, // how many tokens can members of this whitelist group purchase
totalTokensPurchased, // the total number of tokens purchased in this transaction
totalContributionBalance // the total amount of tokens sender has purchased during public sale
});
}
/// <summary>
/// get the maximum number of NOS that can be purchased by groupNumber during the public sale
/// </summary>
/// <param name="groupNumber"></param>
/// <returns></returns>
public static BigInteger GetGroupMaxContribution(BigInteger groupNumber)
{
BigInteger maxContribution = 0;
uint latestTimeStamp = Helpers.GetBlockTimestamp();
uint publicSaleMaxContribution = (uint)ICOTemplate.MaximumContributionAmount();
uint publicSaleEndTime = (uint)ICOTemplate.PublicSaleEndTime();
//If latest block timestamp is larger than presale start and smaller than presale end: check presale tier contributions.
if (latestTimeStamp >= (uint)ICOTemplate.PresaleStartTime() && latestTimeStamp <= (uint)ICOTemplate.PresaleEndTime())
{
//Presale has not ended. Only presale can participate.
if (groupNumber == 1)
{
//Pre-sale tier 1.
maxContribution = (uint)ICOTemplate.PresaleTierOne();
}
else if (groupNumber == 2)
{
//Pre-sale tier 2.
maxContribution = (uint)ICOTemplate.PresaleTierTwo();
}
else if (groupNumber == 3)
{
//Pre-sale tier 3.
maxContribution = (uint)ICOTemplate.PresaleTierThree();
}
else if (groupNumber == 4)
{
//Tier 4
maxContribution = (uint)ICOTemplate.PresaleTierFour();
}
}
//Otherwise we're in the public sale; get the publicSaleMaxContribution
//publicSaleMaxContribution returns the max contribution based on the presale phase using Helpers.GetPublicSaleMaxContribution()
else if (groupNumber > 0 && groupNumber <= 4 && latestTimeStamp >= (uint)ICOTemplate.PublicSaleStartTime() && latestTimeStamp <= publicSaleEndTime)
{
maxContribution = publicSaleMaxContribution;
}
return(maxContribution);
}
/// <summary>
/// allow allocation of presale purchases by contract administrator. this allows the nOS team to allocate the nOS tokens from the private sale, company reserve, and locked incentive reserve.
/// This method will not allow the private allocations to exceed the defined amount
/// the state of the `LockPrivateSaleAllocation` can be determined by the public using the method `IsPrivateSaleAllocationLocked` (returns timestamp that lock was put in place)
/// </summary>
/// <param name="address"></param>
/// <param name="amountPurchased"></param>
/// <returns></returns>
public static bool AllocatePrivateSalePurchase(byte[] address, string allocationType, BigInteger amountPurchased)
{
amountPurchased = amountPurchased * NEP5.factor;
bool privateSaleLocked = Storage.Get(Storage.CurrentContext, StorageKeys.PrivateSaleAllocationLocked()).AsBigInteger() > 0;
if (privateSaleLocked)
{
Runtime.Notify("AllocatePrivateSalePurchase() privateSaleLocked, can't allocate");
return(false);
}
if (allocationType != "incentive" && allocationType != "privateSale" && allocationType != "company")
{
return(false);
}
BigInteger presaleAllocationMaxValue = ICOTemplate.LockedTokenAllocationAmount() * NEP5.factor;
BigInteger presaleAllocatedValue = Storage.Get(Storage.CurrentContext, StorageKeys.PresaleAllocatedValue()).AsBigInteger();
if ((presaleAllocatedValue + amountPurchased) > presaleAllocationMaxValue)
{
// this purchase will exceed the presale cap.. dont allow
Runtime.Notify("AllocatePrivateSalePurchase() purchase will exceed max allocation");
return(false);
}
if (!TokenSale.SetVestingPeriodForAddress(address, allocationType, amountPurchased))
{
Runtime.Notify("SetVestingPeriodForAddress() failed.");
return(false);
}
Storage.Put(Storage.CurrentContext, StorageKeys.PresaleAllocatedValue(), presaleAllocatedValue + amountPurchased);
transfer(null, address, amountPurchased);
Runtime.Notify("AllocatePrivateSalePurchase() tokens allocated", address, amountPurchased, allocationType);
return(true);
}
/// <summary>
/// initialise the smart contract for use
/// </summary>
/// <returns></returns>
public static bool InitSmartContract()
{
if (Helpers.ContractInitialised())
{
// contract can only be initialised once
Runtime.Log("InitSmartContract() contract already initialised");
return(false);
}
uint ContractInitTime = Helpers.GetBlockTimestamp();
Storage.Put(Storage.CurrentContext, StorageKeys.ContractInitTime(), ContractInitTime);
// assign pre-allocated tokens to the NosProjectKey() (10,000,000 tokens)
BigInteger immediateProjectAllocationValue = ICOTemplate.ImmediateCompanyReserve() * NEP5.factor;
Helpers.SetBalanceOf(ICOTemplate.NosProjectKey, immediateProjectAllocationValue);
transfer(null, ICOTemplate.NosProjectKey, immediateProjectAllocationValue);
// token allocated to private sale & vested reserves & incentives
BigInteger presaleAllocationMaxValue = ICOTemplate.LockedTokenAllocationAmount() * NEP5.factor;
// update the total supply to reflect the project allocated tokens
BigInteger totalSupply = immediateProjectAllocationValue + presaleAllocationMaxValue;
Helpers.SetTotalSupply(totalSupply);
UpdateAdminAddress(ICOTemplate.InitialAdminAccount);
EnableTransferFromWhitelisting(ICOTemplate.WhitelistTransferFromListings());
Runtime.Log("InitSmartContract() contract initialisation complete");
return(true);
}
/// <summary>
/// the core teams token allocation follow a linear quarterly maturation over 18 months beginning after 6 months
/// </summary>
/// <returns></returns>
public static object[] GetCoreTeamVestingSchedule()
{
// calculate the allocation given to each team member
object[] founderKeys = ICOTemplate.MoonlightFounderKeys();
BigInteger founderTokenAllocation = ((ICOTemplate.TokenMaxSupply * (BigInteger)ICOTemplate.MoonlightFoundersAllocationPercentage()) / 100) * NEP5.factor;
BigInteger individualAllocation = founderTokenAllocation / founderKeys.Length;
uint ContractInitTime = Helpers.GetContractInitTime();
// determine vesting schedule details for core teams token allocation
// there will be 7 releases, one each quarter ending 2 years from contract init
int numberOfTokenReleases = 7;
BigInteger tokensPerRelease = individualAllocation / numberOfTokenReleases;
object[] vestingPeriod = new object[14];
object[] founderReleaseSchedule = ICOTemplate.MoonlightFoundersAllocationReleaseSchedule();
uint initialReleaseDate = ContractInitTime + (uint)founderReleaseSchedule[0];
uint releaseFrequency = (uint)founderReleaseSchedule[1];
BigInteger tokensReleased = tokensPerRelease;
// this is not the nicest way to populate the vesting schedule array, but it is much cheaper (in terms of processing/gas price) than looping
vestingPeriod[0] = initialReleaseDate;
vestingPeriod[1] = tokensPerRelease;
// 3 months later release another batch of tokens
tokensReleased += tokensPerRelease;
vestingPeriod[2] = initialReleaseDate + (releaseFrequency * 1);
vestingPeriod[3] = tokensPerRelease;
// 3 months later release another batch of tokens
tokensReleased += tokensPerRelease;
vestingPeriod[4] = initialReleaseDate + (releaseFrequency * 2);
vestingPeriod[5] = tokensPerRelease;
// 3 months later release another batch of tokens
tokensReleased += tokensPerRelease;
vestingPeriod[6] = initialReleaseDate + (releaseFrequency * 3);
vestingPeriod[7] = tokensPerRelease;
// 3 months later release another batch of tokens
tokensReleased += tokensPerRelease;
vestingPeriod[8] = initialReleaseDate + (releaseFrequency * 4);
vestingPeriod[9] = tokensPerRelease;
// 3 months later release another batch of tokens
tokensReleased += tokensPerRelease;
vestingPeriod[10] = initialReleaseDate + (releaseFrequency * 5);
vestingPeriod[11] = tokensPerRelease;
// 3 months later release the last of the tokens
vestingPeriod[12] = initialReleaseDate + (releaseFrequency * 6);
vestingPeriod[13] = individualAllocation - tokensReleased;
/*
* Runtime.Notify("VestingSchedule", Helpers.SerializeArray(vestingPeriod));
* a serialised copy of this array ends up with values such as (dates subject to change):
* 0e
* 04 292cf05b 5bf02c29 1542466601 Saturday, November 17, 2018 2:56:41 PM
* 07 6ddb810adb0301 0103db0a81db6d 285714285714285
* 04 0979685c 5c687909 1550350601 Saturday, February 16, 2019 8:56:41 PM
* 07 dab60315b60702 0207b61503b6da 571428571428570
* 04 e9c5e05c 5ce0c5e9 1558234601 Sunday, May 19, 2019 2:56:41 AM
* 07 4792851f910b03 030b911f859247 857142857142855
* 04 c912595d 5d5912c9 1566118601 Sunday, August 18, 2019 8:56:41 AM
* 07 b46d072a6c0f04 040f6c2a076db4 1142857142857140
* 04 a95fd15d 5dd15fa9 1574002601 Sunday, November 17, 2019 2:56:41 PM
* 07 21498934471305 05134734894921 1428571428571425
* 04 89ac495e 5e49ac89 1581886601 Sunday, February 16, 2020 8:56:41 PM
* 07 8e240b3f221706 0617223f0b248e 1714285714285710
* 04 69f9c15e 5ec1f969 1589770601 Monday, May 18, 2020 2:56:41 AM
* 07 00008d49fd1a07 071afd498d0000 2000000000000000
*/
return(vestingPeriod);
}
/// <summary>
/// NEP5: Transfer tokens from one account to another
/// </summary>
/// <param name="from">sender address</param>
/// <param name="to">recipient address</param>
/// <param name="amount">number of tokens to transfer</param>
/// <param name="caller"></param>
/// <param name="entry"></param>
/// <returns></returns>
public static bool Transfer(byte[] from, byte[] to, BigInteger amount, byte[] caller, byte[] entry)
{
if (Helpers.GetBlockTimestamp() < ICOTemplate.PublicSaleEndTime())
{
Runtime.Log("Transfer() not available before ICOTemplate.PublicSaleEndTime()");
return(false);
}
if (caller != entry && !Helpers.IsContractWhitelistedTransferFrom(caller))
{
from = caller;
}
if (from.Length != 20 || to.Length != 20)
{
Runtime.Log("Transfer() (from|to).Length != 20");
return(false);
}
if (amount < 0)
{
Runtime.Log("Transfer() invalid transfer amount must be >= 0");
throw new Exception();
}
BigInteger fromBalance = BalanceOf(from); // retrieve balance of originating account
if (fromBalance < amount)
{
Runtime.Log("Transfer() fromBalance < transferValue");
// don't transfer if funds not available
return(false);
}
if (amount == 0 || from == to)
{
// don't accept a meaningless value
Runtime.Log("Transfer() empty transfer amount or from==to");
transfer(from, to, amount);
return(true); // as per nep5 standard - return true when amount is 0 or from == to
}
if (!Runtime.CheckWitness(from))
{
// ensure transaction is signed properly by the owner of the tokens
Runtime.Log("Transfer() CheckWitness failed");
return(false);
}
BigInteger recipientBalance = BalanceOf(to);
BigInteger recipientAmountSubjectToVesting = TokenSale.SubjectToVestingPeriod(to);
BigInteger senderAmountSubjectToVesting = TokenSale.SubjectToVestingPeriod(from);
BigInteger newBalance = fromBalance - amount;
Helpers.SetBalanceOf(from, newBalance + senderAmountSubjectToVesting); // remove balance from originating account
Helpers.SetBalanceOf(to, recipientBalance + recipientAmountSubjectToVesting + amount); // set new balance for destination account
transfer(from, to, amount);
return(true);
}
/// <summary>
/// transfer an amount from the "from" account to the "to" acount if the originator has been approved to transfer the requested amount.
/// </summary>
/// <param name="originator"></param>
/// <param name="from"></param>
/// <param name="to"></param>
/// <param name="amount"></param>
/// <param name="caller"></param>
/// <param name="entry"></param>
/// <returns></returns>
public static bool TransferFrom(byte[] originator, byte[] from, byte[] to, BigInteger amount, byte[] caller, byte[] entry)
{
if (Helpers.GetBlockTimestamp() < ICOTemplate.PublicSaleEndTime())
{
Runtime.Log("TransferFrom() not available before ICOTemplate.PublicSaleEndTime()");
return(false);
}
if (caller != entry && !Helpers.IsContractWhitelistedTransferFrom(caller))
{
originator = caller;
}
if (originator.Length != 20 || from.Length != 20 || to.Length != 20)
{
Runtime.Log("TransferFrom() (originator|from|to).Length != 20");
return(false);
}
if (amount < 0)
{
Runtime.Log("TransferFrom() invalid transfer amount must be >= 0");
throw new Exception();
}
BigInteger approvedTransferAmount = Allowance(from, to); // how many tokens is this address authorised to transfer
BigInteger fromBalance = BalanceOf(from); // retrieve balance of authorised account
if (approvedTransferAmount < amount || fromBalance < amount)
{
// don't transfer if funds not available
Runtime.Notify("TransferFrom() (authorisedAmount|fromBalance) < transferValue", approvedTransferAmount, fromBalance, amount);
return(false);
}
if (amount == 0 || from == to)
{
// don't accept a meaningless value
Runtime.Log("TransferFrom() empty transfer amount or from==to");
transfer(from, to, amount);
return(true); // as per nep5 standard - return true when amount is 0 or from == to
}
if (!Runtime.CheckWitness(originator))
{
// ensure transaction is signed properly by the request originator
Runtime.Log("TransferFrom() CheckWitness failed");
return(false);
}
BigInteger recipientBalance = BalanceOf(to);
BigInteger recipientAmountSubjectToVesting = TokenSale.SubjectToVestingPeriod(to);
BigInteger senderAmountSubjectToVesting = TokenSale.SubjectToVestingPeriod(from);
BigInteger newBalance = fromBalance - amount;
Helpers.SetBalanceOf(from, newBalance + senderAmountSubjectToVesting); // remove balance from originating account
Helpers.SetBalanceOf(to, recipientBalance + recipientAmountSubjectToVesting + amount); // set new balance for destination account
Helpers.SetAllowanceAmount(from.Concat(originator), approvedTransferAmount - amount); // deduct transferred amount from allowance
transfer(from, to, amount);
return(true);
}
/// <summary>
/// retrieve information for the received transaction
/// </summary>
/// <returns>object[] {
/// (Transaction)tx, (byte[])sender, (byte)receiver, ulong receivedNEO, ulong receivedGAS,
/// (BigInteger)whiteListGroupNumber, (BigInteger)crowdsaleAvailableAmount, (BigInteger)groupMaximumContribution
/// (BigInteger)totalTokensPurchased, (BigInteger)neoRemainingAfterPurchase, (BigInteger)gasRemainingAfterPurchase
/// (BigInteger)totalContributionBalance
/// }
/// </returns>
public static object[] GetTransactionAndSaleData()
{
Transaction tx = (Transaction)ExecutionEngine.ScriptContainer;
TransactionOutput[] inputs = tx.GetReferences();
TransactionOutput reference = inputs[0];
TransactionOutput[] outputs = tx.GetOutputs();
byte[] sender = reference.ScriptHash;
byte[] receiver = ExecutionEngine.ExecutingScriptHash;
ulong receivedNEO = 0;
ulong receivedGAS = 0;
foreach (var input in inputs)
{
// ensure that the provided inputs are valid
if (input.ScriptHash == receiver)
{
throw new System.Exception();
}
}
foreach (TransactionOutput output in outputs)
{
if (output.ScriptHash == receiver)
{
// only add funds to total received value if receiver is the recipient of the output
ulong receivedValue = (ulong)output.Value;
Runtime.Notify("GetTransactionData() Received Deposit type", receiver, reference.AssetId);
if (reference.AssetId == NEP5.NEO)
{
receivedNEO += receivedValue;
}
else if (reference.AssetId == NEP5.GAS)
{
receivedGAS += receivedValue;
}
}
}
BigInteger whiteListGroupNumber = KYC.GetWhitelistGroupNumber(sender);
BigInteger crowdsaleAvailableAmount = NEP5.CrowdsaleAvailableAmount();
BigInteger groupMaximumContribution = KYC.GetGroupMaxContribution(whiteListGroupNumber) * NEP5.factor;
BigInteger totalTokensPurchased = 0;
BigInteger neoRemainingAfterPurchase = 0;
BigInteger gasRemainingAfterPurchase = 0;
BigInteger runningCrowdsaleAmount = crowdsaleAvailableAmount;
if (ICOTemplate.ICOAllowsNEO() && receivedNEO > 0)
{
BigInteger neoTokenValue = receivedNEO * ICOTemplate.ICONeoToTokenExchangeRate();
if (neoTokenValue > runningCrowdsaleAmount)
{
// the user is trying to purchase more tokens than are available
// figure out how much NOS can be purchased without exceeding the cap
neoRemainingAfterPurchase = (neoTokenValue - runningCrowdsaleAmount) / (ICOTemplate.ICONeoToTokenExchangeRate());
totalTokensPurchased = runningCrowdsaleAmount;
}
else
{
// there is enough NOS left for this purchase to complete
totalTokensPurchased = neoTokenValue;
}
// ensure amountAvailable now reflects number of tokens purchased with NEO
runningCrowdsaleAmount -= totalTokensPurchased;
}
if (ICOTemplate.ICOAllowsGAS() && receivedGAS > 0)
{
BigInteger gasTokenValue = receivedGAS * ICOTemplate.ICOGasToTokenExchangeRate();
if (gasTokenValue > runningCrowdsaleAmount)
{
// the user is trying to purchase more tokens than are available
// figure out how much NOS can be purchased without exceeding the cap
gasRemainingAfterPurchase = (gasTokenValue - runningCrowdsaleAmount) / (ICOTemplate.ICOGasToTokenExchangeRate());
totalTokensPurchased = totalTokensPurchased + runningCrowdsaleAmount;
}
else
{
totalTokensPurchased = totalTokensPurchased + gasTokenValue;
}
}
BigInteger totalContributionBalance = BalanceOfSaleContribution(sender) + totalTokensPurchased;
return(new object[] {
tx, // neo transaction object
sender, // who initiated the transfer
receiver, // who the assets were sent to
receivedNEO, // how many neo were transferred
receivedGAS, // how many gas were transferred
whiteListGroupNumber, // what whitelist group is the sender in
crowdsaleAvailableAmount, // how many tokens are left to be purchased
groupMaximumContribution, // how many tokens can members of this whitelist group purchase
totalTokensPurchased, // the total number of tokens purchased in this transaction
neoRemainingAfterPurchase, // how much neo is left after purchase of tokens
gasRemainingAfterPurchase, // how much gas is left after purchase of tokens
totalContributionBalance // the total amount of tokens sender has purchased during public sale
});
}
public static object HandleNEP5Operation(string operation, object[] args, byte[] caller, byte[] entry)
{
//{ "name", "symbol", "decimals", "totalSupply", "balanceOf", "transfer", "transferFrom", "approve", "allowance" };
if (operation == "name")
{
// the name of the token
return(ICOTemplate.TokenName());
}
if (operation == "symbol")
{
// the symbol of the token
return(ICOTemplate.TokenSymbol());
}
if (operation == "decimals")
{
// decimals to determine fractions of tokens
return(TokenDecimals());
}
if (operation == "totalSupply")
{
// the total number of tokens minted
return(TotalSupply());
}
if (operation == "balanceOf")
{
// retreive the balance of an address
if (!Helpers.RequireArgumentLength(args, 1))
{
// BalanceOf() requires at least 1 argument - the address to check the balance of
return(false);
}
return(BalanceOf((byte[])args[0]));
}
if (operation == "transfer")
{
// transfer tokens from one address to another
if (!Helpers.RequireArgumentLength(args, 3))
{
// Transfer() requires 3 arguments: from, to, amount
return(false);
}
return(Transfer((byte[])args[0], (byte[])args[1], (BigInteger)args[2], caller, entry));
}
if (operation == "transferFrom")
{
// transfer tokens from one address to another
if (!Helpers.RequireArgumentLength(args, 4))
{
// TransferFrom() requires 4 arguments: spender, from, to, amount
return(false);
}
return(TransferFrom((byte[])args[0], (byte[])args[1], (byte[])args[2], (BigInteger)args[3], caller, entry));
}
if (operation == "approve")
{
// approve a third party to transfer tokens from one address to another
if (!Helpers.RequireArgumentLength(args, 3))
{
// Approve() requires 3 arguments: from, spender, amount
return(false);
}
return(Approve((byte[])args[0], (byte[])args[1], (BigInteger)args[2], caller, entry));
}
if (operation == "allowance")
{
// retreive the authorised balance of an address
if (!Helpers.RequireArgumentLength(args, 2))
{
// Allowance() requires 2 arguments: from, to
return(false);
}
return(Allowance((byte[])args[0], (byte[])args[1]));
}
// check how many tokens left for purchase
if (operation == "crowdsale_available_amount")
{
return(CrowdsaleAvailableAmount());
}
if (operation == "mintTokens")
{
return(TokenSale.MintTokens());
}
return(false);
}
/// <summary>
/// set a vesting schedule, as defined in the whitepaper, for tokens purchased during the presale
/// </summary>
/// <param name="address"></param>
/// <param name="tokenBalance"></param>
/// <returns></returns>
public static bool SetVestingPeriodForAddress(byte[] address, string allocationType, BigInteger tokensPurchased)
{
if (allocationType != "incentive" && allocationType != "privateSale" && allocationType != "company")
{
return(false);
}
if (address.Length != 20)
{
return(false);
}
BigInteger currentAvailableBalance = 0; // how many tokens will be immediately available to the owner
uint contractInitTime = Helpers.GetContractInitTime();
uint currentTimestamp = Helpers.GetBlockTimestamp();
StorageMap vestingData = Storage.CurrentContext.CreateMap(StorageKeys.VestedTokenPrefix());
uint initialReleaseDate = 0;
uint releaseFrequency = 0;
object[] vestingObj = new object[0];
if (allocationType == "incentive")
{
vestingObj = ICOTemplate.VestingIncentive();
initialReleaseDate = (uint)vestingObj[0] + contractInitTime;
releaseFrequency = (uint)vestingObj[1];
}
else if (allocationType == "privateSale")
{
vestingObj = ICOTemplate.VestingPrivateSale();
initialReleaseDate = contractInitTime;
releaseFrequency = (uint)vestingObj[0];
}
else if (allocationType == "company")
{
vestingObj = ICOTemplate.VestingCompany();
initialReleaseDate = (uint)vestingObj[0] + contractInitTime;
releaseFrequency = (uint)vestingObj[0];
}
object[] releasePeriod = new object[4];
releasePeriod[0] = initialReleaseDate;
releasePeriod[1] = initialReleaseDate + releaseFrequency;
releasePeriod[2] = initialReleaseDate + (releaseFrequency * 2);
releasePeriod[3] = initialReleaseDate + (releaseFrequency * 3);
// calculate how much should be released
BigInteger releaseAmount = tokensPurchased * ICOTemplate.DistributionPercentage() / 100;
object[] lockoutTimes = new object[] { releasePeriod[0], releaseAmount, releasePeriod[1], releaseAmount, releasePeriod[2], releaseAmount, releasePeriod[3], releaseAmount };
vestingData.Put(address, lockoutTimes.Serialize());
// ensure the total amount purchased is saved
Helpers.SetBalanceOf(address, tokensPurchased);
Helpers.SetBalanceOfVestedAmount(address, tokensPurchased, allocationType);
transfer(null, address, tokensPurchased);
return(true);
}
/// <summary>
/// allow allocation of presale purchases by contract administrator. this allows the moonlight team to allocate the 25% of LX tokens sold in the private presale.
/// as we accepted ETH in addition to NEO&GAS, using a mintTokens method here is not practical.
/// 1. this method will not allow the presale allocation to exceed the defined amount
/// 2. this method is permanently disabled once the method `LockPresaleAllocation` has been called.
/// 3. the state of the `LockPresaleAllocation` can be determined by the public using the method `IsPresaleAllocationLocked` (returns timestamp that lock was put in place)
/// </summary>
/// <param name="address"></param>
/// <param name="amountPurchased"></param>
/// <returns></returns>
public static bool AllocatePresalePurchase(byte[] address, BigInteger amountPurchased)
{
bool presaleLocked = Storage.Get(Storage.CurrentContext, StorageKeys.PresaleAllocationLocked()).AsBigInteger() > 0;
if (presaleLocked)
{
Runtime.Notify("AllocatePresalePurchase() presaleLocked, can't allocate");
return(false);
}
BigInteger presaleAllocationMaxValue = ((ICOTemplate.TokenMaxSupply * (BigInteger)ICOTemplate.PresaleAllocationPercentage()) / 100) * NEP5.factor;
BigInteger presaleAllocatedValue = Storage.Get(Storage.CurrentContext, StorageKeys.PresaleAllocatedValue()).AsBigInteger();
if ((presaleAllocatedValue + amountPurchased) > presaleAllocationMaxValue)
{
// this purchase will exceed the presale cap.. dont allow
Runtime.Notify("AllocatePresalePurchase() purchase will exceed presale max allocation");
return(false);
}
TokenSale.SetVestingPeriodForAddress(address, amountPurchased);
Storage.Put(Storage.CurrentContext, StorageKeys.PresaleAllocatedValue(), presaleAllocatedValue + amountPurchased);
Runtime.Notify("AllocatePresalePurchase() tokens allocated", address, amountPurchased);
return(true);
}