V2Exchange

This is a smart contract to expand KIP7 that is created with every liquidity pair. The Factory deploys this as new pool creation is requested. Although the Factory actually stores the two tokens of a pair and swapping takes place through it, the Exchange Contract must be called for liquidity to be provided or taken.

Code

Github Link: (Will be updated after official launch)

Address

Contract adress after production is deployed (scope link)

Events, Read-Only Functions, and State-Changing Functions

Events

Transfer

event Transfer(address indexed from, address indexed to, uint amount);

KIP7 Standard
Event log of Transfer/Mint/Burn

Approval

event Approval(address indexed holder, address indexed spender, uint amount);

KIP7 Standard
Event log of Approvals

ChangeMiningRate

event ChangeMiningRate(uint _mining);

Event log of mining rate change

ChangeFee

event ChangeFee(uint _fee);

Event log of trading fee rate changes

UpdateMiningIndex

event UpdateMiningIndex(uint lastMined, uint miningIndex);

Event log of pairs’ mining index changes
lastMined : Factory.mined() value at the time index is updated
miningIndex : pairs’ miningIndex value at the time

GiveReward

event GiveReward(address user, uint amount, uint lastIndex, uint rewardSum);

Event log of when mined KSP is claimed and distributed
user : address of the user who claimed
amount : the amount of KSP claimed
lastIndex : index result of the pair of the wallet after claiming
rewardSum : The amount of KSP that has been accrued so far

ExchangePos

event ExchangePos(address tokenA, uint amountA, address tokenB, uint amountB);

Event log of POS transactions
tokenA : Token address delivered by the user
amountA : the amount of tokens delivered by the user
tokenB : token address received by user
amountB : the amount of tokens received by the user

ExchangeNeg

event ExchangeNeg(address tokenA, uint amountA, address tokenB, uint amountB);

Event log of NEG transactions
tokenA : token address delivered by the user
amountA : the amount of tokens delivered by the user
tokenB : token address received by the user
amountB : the amount of tokens received by the user

AddLiquidity

event AddLiquidity(address user, address tokenA, uint amountA, address tokenB, uint amountB, uint liquidity);

Event log of liquidity additions
liquidity : the amount of LP tokens minted due to additional liquidity

RemoveLiquidity

event RemoveLiquidity(address user, address tokenA, uint amountA, address tokenB, uint amountB, uint liquidity);

Event log of liquidity removals
liquidity : the amount of LP tokens burned due to liquidity removal

Read-Only Functions

name

KlaySwap LP

symbol

"KSLP" + " " + symbolA + "-" + symbolB

decimals

totalSupply

mint/burn depending on liquidity addition/removal

balanceOf

Number of LP tokens held by each address

allowance

Status of approval to spender for each address

factory

The factory address where the LP smart contract is deployed

tokenA

The first token address composed of the pair
When KLAY is one part of the pair, tokenA == 0x0

tokenB

The second token address composed of the pair

fee

Transaction fee for the pair
It is a value between 0 and 100, in units of 0.01%
1 == 0.01%, 100 == 1%

mining

The mining rate of the pair
It is a value between 0 and 100, in units of 1%
e.g. If mining is 10, the pair has claim authority for 10% of the quantity mined per block in the factory.

lastMined

Factory.mined() value at the last time the pair updated the index

userRewardSum

mapping(address => uint )
Stores the cumulatively claimed KSP quantity value for each user

getCurrentPool

function getCurrentPool() public view returns (uint, uint)

Returns the liquidity quantity of the two assets in the current pool

estimatePos

function estimatePos(address token, uint amount) public view returns (uint)

When a request is made to sell the amount of the corresponding token through a POS transaction, the expected receiving amount of the opposite token is returned.

estimateNeg

function estimateNeg(address token, uint amount) public view returns (uint)

When a request is made to purchase the amount of the corresponding token through a NEG transaction, the expected payment amount of the opposite token is returned.

State-Changing Functions

transfer

function transfer(address _to, uint _value) public returns (bool)

KIP7 Standard
Method for KSP token transfer

transferFrom

function transferFrom(address _from, address _to, uint _value) public returns (bool)

KIP7 Standard
Method to transfer tokens on behalf of the approved wallet

approve

function approve(address _spender, uint _value) public returns (bool)

KIP7 Standard
Method to approve transfer as much as value to the spender

updateMiningIndex

function updateMiningIndex() public

Method to update the value of the pair contract based on the current Factory.mined() value
Anyone can call in real time. Even if no one calls it, it calls itself if necessary.

claimReward

function claimReward() public

Method that a user calls to claim the claimable KSP that has accumulated for the pair
When called, KSP is claimed from the Factory and paid to msg.sender
Even if the method is not called directly, it is automatically called when the LP token balance of the user’s wallet changes.
- When liquidity is added
- When liquidity is removed
- When LP tokens are sent
- When LP tokens are received

addKlayLiquidity

function addKlayLiquidity(uint amount) public payable

Method used to provide liquidity when tokenA is KLAY
Liquidity of the KLAY msg.value and tokenB amount is provided.
After liquidity is provided, the LP token corresponding to the pool share is minted in the msg.sender wallet.
If the pair ratio is wrong, as much liquidity as possible is supplied at the current pair ratio, and the remaining tokens are returned to msg.sender.
If there is claimable KSP when called, the claim proceeds to msg.sender.

addKlayLiquidityWithLimit

function addKlayLiquidityWithLimit(uint amount, uint minAmountA, uint minAmountB) public payable

Method used to provide liquidity when tokenA is KLAY
Liquidity of the KLAY msg.value and tokenB amount is provided.
Set the minimum amount of tokenA and tokenB to be used for liquidity supply using minAmountA, minAmountB.
After liquidity is provided, the LP token corresponding to the pool share is minted in the msg.sender wallet.
If the pair ratio is wrong, as much liquidity as possible is supplied at the current pair ratio, and the remaining tokens are returned to msg.sender.
If there is claimable KSP when called, the claim proceeds to msg.sender.

addKctLiquidity

function addKctLiquidity(uint amountA, uint amountB) public

Method used to provide liquidity when tokenA is KIP7 standard token
Liquidity of the number of tokenA amountA and tokenB amountB is provided.
After liquidity is provided, the LP token corresponding to the pool share is minted in the msg.sender wallet.
If the pair ratio is wrong, as much liquidity as possible is supplied at the current pair ratio, and the remaining tokens are returned to msg.sender.
If there is claimable KSP when called, the claim proceeds to msg.sender.

addKctLiquidityWithLimit

function addKctLiquidityWithLimit(uint amountA, uint amountB, uint minAmountA, uint minAmountB) public

Method used to provide liquidity when tokenA is KIP7 standard token
Liquidity of the number of tokenA amountA and tokenB amountB is provided.
Set the minimum amount of tokenA and tokenB to be used for liquidity supply using minAmountA, minAmountB.
After liquidity is provided, the LP token corresponding to the pool share is minted in the msg.sender wallet.
If the pair ratio is wrong, as much liquidity as possible is supplied at the current pair ratio, and the remaining tokens are returned to msg.sender.
If there is claimable KSP when called, the claim proceeds to msg.sender.

removeLiquidity

function removeLiquidity(uint amount) public

Returns the amount of LP tokens, and distributes the corresponding tokenA and tokenB to the msg.sender wallet
The returned LP token amount is burned
If there is claimable KSP when called, the claim proceeds to msg.sender.

removeLiquidityWithLimit

function removeLiquidityWithLimit(uint amount, uint minAmountA, uint minAmountB) public

Returns the amount of LP tokens, and distributes the corresponding tokenA and tokenB to the msg.sender wallet
Set the minimum amount for the returned tokenA and tokenB amounts by using minAmountA, minAmountB.
The returned LP token amount is burned
If there is claimable KSP when called, the claim proceeds to msg.sender.

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Last updated 1 year ago