FXXX LandRush
The FxxxLandRush.sol smart contract allow users to purchase of FXXX parcels of land using GZE:0x4AC0 (GazeCoin Metaverse Token) or ethers (ETH).
Purchase price:
- The price of each parcel of land is USD 1,500 (and some parcels with variations of this amount)
- The ETH purchase amount is calculated using the MakerDAO ETH/USD pricefeed rate at MakerDAOETHUSDPriceFeed:0x729D. The MakerDAOPriceFeedAdaptor.sol deployed to MakerDAOETHUSDPriceFeedAdaptor:0xF31A will reflect the MakerDAO ETH/USD rate
- The GZE purchase amount is calculated using the less frequently updated GZE/ETH pricefeed rate that is multiplied by the MakerDAO ETH/USD pricefeed rate. The GZE/ETH pricefeed has been deployed to GZEETHPriceFeed:0xD649
- Purchases using GZE will have a 30% discount if the purchasing account has been added to the BonusList.sol deployed to BonusList:0x57D2. Accounts not in the BonusList will get a 20% discount when purchasing with GZE
There are 17 sectors containing parcels of land that will be sold at different timeframes. Each of these sectors will have a unique FxxxLandRush.sol smart contract, and an associated BTTSToken smart contract to record the purchases of these parcels.
When the parcels of land are later available for development, the BTTSToken parcel tokens are exchanged for ERC721 Non-Fungible Token tokens representing the ownership of the FXXX parcels of land.
Table Of Contents
- Deployment Addresses
- Deployment And Configuration Of FxxxLandRush Contracts
- Updating The GZE/ETH PriceFeed
- Updating The BonusList
- Code Review
Deployment Addresses
See deployment for deployment details. See scripts/genData.sh, scripts/deployment.js and scripts/FxxxLandRushSummary.json for deployment statistics.
Purchasing Contract And Token Contract
See Purchasing for instructions to purchase parcels of land from the FxxxLandRush contract.
FxxxLand purchasing contract and token contract for each zone:
| Token Symbol / Name | Purchasing Contract / Token Contract Address | Purchase From | Purchase To |
|---|---|---|---|
| FxxxHub / Fantasy Hub | 0x3b0c1b99fAAfd625aACD70521d8Da167807B3b82 / 0x5B98a13e7c6Aef063551643B0171d5Cd681BF4da | Oct 16 2018 15:00 PST | Nov 16 2018 15:00 PST |
| FxxxRk / Fantasy Riot Kitty | 0x460E0e607eBD39C8927210A7f32ef7bD170F7d40 / 0xd73b9d06bffA9d8B6D2E5f03de578103531215fF | Nov 19 2018 15:00 PST | Dec 08 2018 15:00 PST |
| FxxxDude / Fantasy Dude Sweet | 0xbF68F58CE089b97b2F7146d2EC097F5Af9Ac217F / 0xc70ABb3546D0976d91D91AaD2773fAE69e106599 | Nov 19 2018 15:00 PST | Dec 08 2018 15:00 PST |
| FxxxBooty / Fantasy Booty Sector | 0xf9A6d564217c44ab64E28C7F34CB8fE246f57539 / 0xBC844A541855Cb797163e7f4344616a97a89ccB2 | Nov 19 2018 15:00 PST | Dec 08 2018 15:00 PST |
Time Conversions:
| PST Time | UTC Time | AEST Time | Unix Time | new Date(Unix Time * 1000).toUTCString() |
|---|---|---|---|---|
| Oct 16 2018 15:00 | Oct 16 2018 23:00 | Oct 17 2018 10:00 | 1539730800 | "Tue, 16 Oct 2018 23:00:00 UTC" |
| Nov 16 2018 15:00 | Nov 16 2018 23:00 | Nov 17 2018 10:00 | 1542409200 | "Fri, 16 Nov 2018 23:00:00 UTC" |
| Nov 19 2018 15:00 | Nov 19 2018 23:00 | Nov 20 2018 10:00 | 1542668400 | "Mon, 19 Nov 2018 23:00:00 UTC" |
| Dec 08 2018 15:00 | Dec 08 2018 23:00 | Dec 09 2018 10:00 | 1544310000 | "Sat, 08 Dec 2018 23:00:00 UTC" |
Available Parcels:
The presale parcels are available for purchase through these FxxxLandRush contracts.
| Zone | Presale # | Total # | USD per Parcel |
|---|---|---|---|
| FxxxHub | 141 | 689 | 1500 |
| FxxxRk | 38 | 200 | 2500 |
| FxxxDude | 12 | 125 | 25000 |
| FxxxBooty | 16 | 79 | 5000 |
Other Contracts
| Contract | Address |
|---|---|
| MakerDAOETHUSDPriceFeedAdaptor:0xF31A | 0xF31AA1dFbEd873Ab957896a0204a016F5E123e02 |
| GZEETHPriceFeed:0xD649 | 0xD649c9b68BB78e8fd25c0B7a9c22c42f57768c91 |
| BonusList:0x57D2 | 0x57D2F4B8F55A26DfE8Aba3c9f1c73CADbBc55C46 |
Deployment And Configuration Of FxxxLandRush Contracts
An FxxxLandRush contract will be deployed for each sector.
Deployment Of FxxxLandRush Contract
Following are the constructor parameters
| No | Type | Notes |
|---|---|---|
| address | _parcelToken | FxxxLandRush sector token |
| address | _gzeToken | GZE:0x4AC0 address 0x4AC00f287f36A6Aad655281fE1cA6798C9cb727b |
| address | _ethUsdPriceFeed | MakerDAOETHUSDPriceFeedAdaptor:0xF31A address 0xF31AA1dFbEd873Ab957896a0204a016F5E123e02 |
| address | _gzeEthPriceFeed | GazeCoin maintained GZEETHPriceFeed:0xD649 address 0xD649c9b68BB78e8fd25c0B7a9c22c42f57768c91 |
| address | _bonusList | BonusList:0x57D2 address 0x57D2F4B8F55A26DfE8Aba3c9f1c73CADbBc55C46 |
| address | _wallet | Wallet for GZE and ETH |
| uint | _startDate | Start date, in seconds since Jan 01 1970 |
| uint | _endDate | End date, in seconds since Jan 01 1970 |
| uint | _maxParcels | Maximum parcels of land for the sector |
| uint | _parcelUsd | Price of a parcel of land, in USD. e.g., USD 1,500 is specified as 1,500 * 10^18 |
| uint | _usdLockAccountThreshold | Lock transfers for purchasing account if USD amount exceeds this threshold. e.g. USD 7,000 is specified as 7,000 * 10^18 |
| uint | _gzeBonusOffList | Bonus for accounts not listed in the BonusList contract. e.g. 20% is specified as 20 |
| uint | _gzeBonusOnList | Bonus for accounts listed in the BonusList contract. e.g., 30% is specified as 30 |
FxxxLandRush Contract Configuration
setWallet
function setWallet(address _wallet)Parameters:
| No | Type | Notes |
|---|---|---|
| address | _wallet | Wallet for GZE and ETH |
setStartDate
function setStartDate(uint _startDate)Parameters:
| No | Type | Notes |
|---|---|---|
| uint | _startDate | Start date, in seconds since Jan 01 1970 |
setEndDate
function setEndDate(uint _endDate)Parameters:
| No | Type | Notes |
|---|---|---|
| uint | _endDate | End date, in seconds since Jan 01 1970 |
setMaxParcels
function setMaxParcels(uint _maxParcels)Parameters:
| No | Type | Notes |
|---|---|---|
| uint | _maxParcels | Maximum parcels of land for the sector |
setParcelUsd
function setParcelUsd(uint _parcelUsd)Parameters:
| No | Type | Notes |
|---|---|---|
| uint | _parcelUsd | Price of a parcel of land, in USD. e.g., USD 1,500 is specified as 1,500 * 10^18 |
setUsdLockAccountThreshold
function setUsdLockAccountThreshold(uint _usdLockAccountThreshold)Parameters:
| No | Type | Notes |
|---|---|---|
| uint | _usdLockAccountThreshold | Lock transfers for purchasing account if USD amount exceeds this threshold. e.g. USD 7,000 is specified as 7,000 * 10^18 |
setGzeBonusOffList
function setGzeBonusOffList(uint _gzeBonusOffList)Parameters:
| No | Type | Notes |
|---|---|---|
| uint | _gzeBonusOffList | Bonus for accounts not listed in the BonusList contract. e.g. 20% is specified as 20 |
setGzeBonusOnList
function setGzeBonusOnList(uint _gzeBonusOnList)Parameters:
| No | Type | Notes |
|---|---|---|
| uint | _gzeBonusOnList | Bonus for accounts listed in the BonusList contract. e.g., 30% is specified as 30 |
Updating The GZE/ETH PriceFeed
The GZE/ETH PriceFeed has been deployed to [GZEETHPriceFeed:0x4604]. See Deployment - GZE/ETH PriceFeed for scripts to update the price feed.
Contract address:
0xD649c9b68BB78e8fd25c0B7a9c22c42f57768c91
Contract ABI:
[{"constant":true,"inputs":[],"name":"name","outputs":[{"name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"name":"","type":"address"}],"name":"operators","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"rate","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"getRate","outputs":[{"name":"_rate","type":"uint256"},{"name":"_live","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_rate","type":"uint256"},{"name":"_live","type":"bool"}],"name":"setRate","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[],"name":"acceptOwnership","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"_newOwner","type":"address"}],"name":"transferOwnershipImmediately","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"owner","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"live","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_operator","type":"address"}],"name":"addOperator","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"_operator","type":"address"}],"name":"removeOperator","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"newOwner","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"inputs":[{"name":"_name","type":"string"},{"name":"_rate","type":"uint256"},{"name":"_live","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":false,"name":"oldRate","type":"uint256"},{"indexed":false,"name":"oldLive","type":"bool"},{"indexed":false,"name":"newRate","type":"uint256"},{"indexed":false,"name":"newLive","type":"bool"}],"name":"SetRate","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"_operator","type":"address"}],"name":"OperatorAdded","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"_operator","type":"address"}],"name":"OperatorRemoved","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"_from","type":"address"},{"indexed":true,"name":"_to","type":"address"}],"name":"OwnershipTransferred","type":"event"}]addOperator
The contract owner adds an operator account that is then permissioned to update the rates. Multiple operators can be permissioned.
function addOperator(address _operator)Parameters:
| No | Type | Notes |
|---|---|---|
| uint | _operator | Operator account |
removeOperator
The contract owner can remove an operator account's permission.
function removeOperator(address _operator)Parameters:
| No | Type | Notes |
|---|---|---|
| uint | _operator | Operator account |
setRate
Any permissioned operator account can set the GZE/ETH rate.
function setRate(uint _rate, bool _live)Parameters:
| No | Type | Notes |
|---|---|---|
| uint | _rate | GZE/ETH market rate. e.g., 0.00004199 is specified as 0.00004199 * 10^18 |
| bool | _live | Is the price live? If the price is not live, user's will not be able to purchase FxxxLandRush parcels with GZE |
Updating The BonusList
The BonusList has been deployed to BonusList:0x57D2. See Deployment - BonusList for scripts to update the bonus list.
Contract address:
0x57D2F4B8F55A26DfE8Aba3c9f1c73CADbBc55C46
Contract ABI:
[{"constant":true,"inputs":[{"name":"","type":"address"}],"name":"operators","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"accounts","type":"address[]"}],"name":"remove","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"name":"","type":"address"}],"name":"bonusList","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[],"name":"acceptOwnership","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"_newOwner","type":"address"}],"name":"transferOwnershipImmediately","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"owner","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"name":"account","type":"address"}],"name":"isInBonusList","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_operator","type":"address"}],"name":"addOperator","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"_operator","type":"address"}],"name":"removeOperator","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"accounts","type":"address[]"}],"name":"add","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"newOwner","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"inputs":[],"payable":false,"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"name":"account","type":"address"},{"indexed":false,"name":"status","type":"bool"}],"name":"AccountListed","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"_operator","type":"address"}],"name":"OperatorAdded","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"_operator","type":"address"}],"name":"OperatorRemoved","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"_from","type":"address"},{"indexed":true,"name":"_to","type":"address"}],"name":"OwnershipTransferred","type":"event"}]addOperator
The contract owner adds an operator account that is then permissioned to update the bonus list. Multiple operators can be permissioned.
function addOperator(address _operator)Parameters:
| No | Type | Notes |
|---|---|---|
| uint | _operator | Operator account |
removeOperator
The contract owner can remove an operator account's permission.
function removeOperator(address _operator)Parameters:
| No | Type | Notes |
|---|---|---|
| uint | _operator | Operator account |
add
Any permissioned operator account can add one or more addresses to the bonus list.
function add(address[] accounts)Parameters:
| No | Type | Notes |
|---|---|---|
| address[] | accounts | Array of accounts to add to the bonus list |
remove
Any permissioned operator account can remove one or more addresses from the bonus list.
function remove(address[] accounts)Parameters:
| No | Type | Notes |
|---|---|---|
| address[] | accounts | Array of accounts to remove from the bonus list |
Code Review
- code-review/Owned.md
- contract Owned
- code-review/Operated.md
- contract Operated is Owned
- code-review/SafeMath.md
- library SafeMath
- code-review/ERC20Interface.md
- contract ERC20Interface
- code-review/BonusListInterface.md
- contract BonusListInterface
- code-review/BonusList.md
- contract BonusList is BonusListInterface, Operated
- code-review/PriceFeedInterface.md
- contract PriceFeedInterface
- code-review/PriceFeed.md
- contract PriceFeed is Operated
- code-review/MakerDAOETHUSDPriceFeedSimulator.md
- contract MakerDAOETHUSDPriceFeedSimulator is Owned
- code-review/MakerDAOPriceFeedAdaptor.md
- contract MakerDAOPriceFeedInterface
- contract MakerDAOPriceFeedAdaptor is PriceFeedInterface
- code-review/FxxxLandRush.md
- contract FxxxLandRush is Owned, ApproveAndCallFallBack
- using SafeMath for uint;
- contract FxxxLandRush is Owned, ApproveAndCallFallBack
Outside Scope
Outside scope as the following have been audited:
- contracts/BTTSTokenInterface110.sol
- contract ApproveAndCallFallBack
- contract BTTSTokenInterface is ERC20Interface
- contracts/BTTSTokenFactory110.sol
- contract ERC20Interface
- contract ApproveAndCallFallBack
- contract BTTSTokenInterface is ERC20Interface
- library BTTSLib
- contract BTTSToken is BTTSTokenInterface
- using BTTSLib for BTTSLib.Data;
- contract Owned
- contract BTTSTokenFactory is Owned
Thanks to Adrian Guerrera for helping to validate these contracts.
(c) BokkyPooBah / Bok Consulting Pty Ltd for GazeCoin - Oct 08 2018. The MIT Licence.