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AMM ETH

The AMMs are used to swap a pegged token to the tenXXX version of the token and the other way around.

Functions

  • toggleBuy() external onlyOwner returns (bool)
  • canBuy() external view returns (bool)
  • getTenToken() external view returns (address)
  • buy(uint256 tokenAmount) external nonReentrant payable returns (bool)
  • sell(uint256 tokenAmount) external nonReentrant returns (bool)
  • getInPrice(uint256 amount) external view returns (uint256)
  • getOutPrice(uint256 amount) external view returns (uint256)

toggleBuy() external onlyOwner returns (bool)

Toggles the possibility to buy over the amm.
function toggleBuy() external onlyOwner returns (bool) {
_canBuy = !_canBuy;
return _canBuy;
}

canBuy() external view returns (bool)

Getter for the possibility to buy over the amm.
function canBuy() external view returns (bool) {
return _canBuy;
}

getTenToken() external view returns (address)

Returns the ten-Token address.
function getTenToken() external view returns (address) {
return address(_tenToken);
}

buy(uint256 tokenAmount) external nonReentrant payable returns (bool)

Mints new ten-Tokens for the sent ERC20 tokens.
function buy(uint256 tokenAmount) external nonReentrant payable returns (bool) {
require(msg.value == tokenAmount, "buy: Sent value is not equal to the amount");
require(_canBuy == true, "buy: The buying function is not activated");
_tenETH.mint(msg.sender, msg.value);
emit Bought(msg.sender, tokenAmount);
return true;
}

sell(uint256 tokenAmount) external nonReentrant returns (bool)

Burns ten-Tokens and sends the ERC20 token amount.
function sell(uint256 tokenAmount) external nonReentrant returns (bool) {
require(address(this).balance >= tokenAmount / 10**_calcDecimals, "sell: Too few pegged tokens locked");
require(_tenETH.totalSupply() >= tokenAmount, "sell: That's too much");
uint256 toSend = _tenETH.burn(msg.sender, tokenAmount);
bool sendTx = payable(msg.sender).send(toSend);
require(sendTx, "sell: No fallback function in contract"); //fix
emit Sold(msg.sender, toSend);
return sendTx;
}

getInPrice(uint256 amount) external view returns (uint256)

Returns the actual price for swapping pegged token to ten-Token which can change. And also have nothing to do with the transaction fees of the ten-Tokens.
function getInPrice(uint256 amount) external view returns (uint256) {
uint256 divisor;
uint256 multiplier;
(divisor, multiplier) = _tenToken.getActualBuyFees();
uint256 fee = amount * multiplier / divisor;
uint256 price = amount - fee;
return price * 10**_calcDecimals;
}

getOutPrice(uint256 amount) external view returns (uint256)

Returns the actual price for swapping ten-Token to pegged token which can change. And also have nothing to do with the transaction fees of the ten-Tokens.
function getOutPrice(uint256 amount) external view returns (uint256) {
uint32 divisor;
uint32 multiplier;
(divisor, multiplier) = _tenToken.getActualSellFees();
uint256 fee = amount * multiplier / divisor;
uint256 price = amount - fee;
return price / 10**_calcDecimals;
}
Last modified 8mo ago