You can use this contract launch your own token or to study the Uniswap V3 ecosystem.
Based on top OpenZeppelin contracts but changed balances from private to internal for flexibility
mapping(address => bool) isTaxlessList of address that won't pay transaction fees
address feeReceiverAddress that will recieve fees taken from each transaction
bool isFeeActiveIf set to true, no fees will be taken on any transaction
uint256 buyFeePercentageFee percentage token when the token is bought on the Uniswap V3 Pair
uint256 p2pFeePercentageFee percentage token when the token is transfered to other address outside of the V3 Pair
uint256 feeDecimalsNumber if fee decimals. Default is 2 so for example 250 means 2.5% in percentage numbers
contract IERC20 baseTokenToken that will be paired with this token when liquidity is added to the DEX
address pool10.01% uniswap v3 pool used to check if the token is being bought or sold
address pool20.05% uniswap v3 pool used to check if the token is being bought or sold
address pool30.3% uniswap v3 pool used to check if the token is being bought or sold
address pool41% uniswap v3 pool used to check if the token is being bought or sold
contract INonfungiblePositionManager nonfungiblePositionManagerUniswap V3 Position Manager used to gather the pool addresses
constructor(string name, string symbol, uint256 totalSupply_, uint256 buyFeePercentage_, uint256 p2pFeePercentage_, address feeReceiver_, address baseTokenAddress, uint160 rate) internalContract constructor
All percentage numbers are two digit decimals. For example 250 means 2.5%
| Name | Type | Description |
|---|---|---|
| name | string | Token Name |
| symbol | string | Token Symbol |
| totalSupply_ | uint256 | Total supply, all supply will be sent to contract deployer |
| buyFeePercentage_ | uint256 | Percent of tokens that will be sent to the feeReciever when token is bought on Uniswap V3 |
| p2pFeePercentage_ | uint256 | Percent of tokens that will be sent to the feeReciever when token is transfered outside of Uniswap V3 |
| feeReceiver_ | address | Address that will recieve the fees taken every transaction |
| baseTokenAddress | address | Token address that this will be paired with on the DEX. Fees will be sent to the autoSwapReciever in the base token denomination |
| rate | uint160 | Initial token value in the form of 1 base token = rate tokens |
function _transfer(address from, address to, uint256 amount) internal virtualThis functions is inherited from OpenZeppelin and implements the transaction fee distribution
function _isPool(address _address) internal view returns (bool)Checks if an address is part of the Uniswap V3 pools. This is for internal use.
function sqrt(uint256 y) internal pure returns (uint256 z)Square root function for internal use
function _setTaxless(address account, bool isTaxless_) internalSet excemptions for transaction fee payments
| Name | Type | Description |
|---|---|---|
| account | address | Address that tax configuration will be affected |
| isTaxless_ | bool | If set to true the account will not pay transaction fees |
function _setFeeReceiver(address feeReceiver_) internalChanges the address that will recieve fees
| Name | Type | Description |
|---|---|---|
| feeReceiver_ | address | If set to true the account will not pay transaction fees |
function _setFeeActive(bool isFeeActive_) internalChanges the address that will recieve fees
| Name | Type | Description |
|---|---|---|
| isFeeActive_ | bool | If set to true all transaction fees will not be charged |
function _setFees(uint256 buyFeePercentage_, uint256 p2pFeePercentage_) internalThe fee percentage for buy, sell and peer to peer
| Name | Type | Description |
|---|---|---|
| buyFeePercentage_ | uint256 | New buy percentage fee |
| p2pFeePercentage_ | uint256 | New peer to peer percentage fee |