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# Solidity API ## BalancerV2FeeToken You can use this contract launch your own token or to study the Balancer ecosystem. _Based on top OpenZeppelin contracts but changed balances from private to internal for flexibility_ ### isTaxless ```solidity mapping(address => bool) isTaxless ``` List of address that won't pay transaction fees ### feeReceiver ```solidity address feeReceiver ``` Address that will recieve fees taken from each transaction ### isFeeActive ```solidity bool isFeeActive ``` If set to true, no fees will be taken on any transaction ### fees ```solidity uint256[] fees ``` Array that defines the transactions fees. Index 0 is buy fee, 1 is sell fee and 2 is peer to peer fee ### feeDecimals ```solidity uint256 feeDecimals ``` Number if fee decimals. Default is 2 so for example 250 means 2.5% in percentage numbers ### balancerVault ```solidity address balancerVault ``` Balancer vault constant address ### constructor ```solidity constructor(string name, string symbol, uint256 totalSupply_, uint256 buyFeePercentage, uint256 sellFeePercentage, uint256 p2pFeePercentage, address feeReceiver_) internal ``` Contract constructor _All percentage numbers are two digit decimals. For example 250 means 2.5%_ #### Parameters | 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 Balancer | | sellFeePercentage | uint256 | Percent of tokens that will be sent to the feeReciever when token is sold on Balancer | | p2pFeePercentage | uint256 | Percent of tokens that will be sent to the feeReciever when token is transfered outside of Balancer | | feeReceiver_ | address | Address that will recieve the fees taken every transaction | ### _transfer ```solidity function _transfer(address from, address to, uint256 amount) internal virtual ``` This functions is inherited from OpenZeppelin and implements the transaction fee distribution ### _setTaxless ```solidity function _setTaxless(address account, bool isTaxless_) internal ``` Set excemptions for transaction fee payments #### Parameters | 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 | ### _setFeeReceiver ```solidity function _setFeeReceiver(address feeReceiver_) internal ``` Changes the address that will recieve fees #### Parameters | Name | Type | Description | | ---- | ---- | ----------- | | feeReceiver_ | address | If set to true the account will not pay transaction fees | ### _setFeeActive ```solidity function _setFeeActive(bool isFeeActive_) internal ``` Changes the address that will recieve fees #### Parameters | Name | Type | Description | | ---- | ---- | ----------- | | isFeeActive_ | bool | If set to true all transaction fees will not be charged | ### _setFees ```solidity function _setFees(uint256 buyFeePercentage, uint256 sellFeePercentage, uint256 p2pFeePercentage) internal ``` The fee percentage for buy, sell and peer to peer #### Parameters | Name | Type | Description | | ---- | ---- | ----------- | | buyFeePercentage | uint256 | New buy percentage fee | | sellFeePercentage | uint256 | New sell percentage fee | | p2pFeePercentage | uint256 | New peer to peer percentage fee |