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👷 add external functions for zapping USDX #67

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Merged
moss-eth merged 2 commits into from
Mar 14, 2025
Merged

👷 add external functions for zapping USDX #67

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f71284f
👷 add external functions for zapping USDX
Flocqst Mar 13, 2025
a6a24fc
👷 _zapOutUSDx
Flocqst Mar 13, 2025
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42 changes: 40 additions & 2 deletions src/Zap.sol
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Original file line number Diff line number Diff line change
Expand Up @@ -136,6 +136,25 @@ contract Zap is Reentrancy, Errors, Flush(msg.sender) {
zapped = _wrap(STATA, SSTATA_SPOT_ID, zapped, _minAmountOut);
}

/// @notice zap USDC into USDx
/// @dev caller must grant USDC allowance to this contract
/// @param _amount amount of USDC to zap
/// @param _minAmountOut acceptable slippage for wrapping and selling
/// @param _receiver address to receive USDx
/// @return zapped amount of USDx received
function zapInUSDX(
uint256 _amount,
uint256 _minAmountOut,
address _receiver
)
external
returns (uint256 zapped)
{
_pull(USDC, msg.sender, _amount);
zapped = _zapInUSDx(_amount, _minAmountOut);
_push(USDX, _receiver, zapped);
}

/// @dev allowance is assumed
/// @dev following execution, this contract will hold the zapped USDx
function _zapInUSDx(
Expand Down Expand Up @@ -181,6 +200,25 @@ contract Zap is Reentrancy, Errors, Flush(msg.sender) {
zapped = _redeemStata(zapped, address(this));
}

/// @notice zap USDx into USDC
/// @dev caller must grant USDx allowance to this contract
/// @param _amount amount of USDx to zap
/// @param _minAmountOut acceptable slippage for buying and unwrapping
/// @param _receiver address to receive USDC
/// @return zapped amount of USDC received
function zapOutUSDX(
uint256 _amount,
uint256 _minAmountOut,
address _receiver
)
external
returns (uint256 zapped)
{
_pull(USDX, msg.sender, _amount);
zapped = _zapOutUSDx(_amount, _minAmountOut);
_push(USDC, _receiver, zapped);
}

/// @dev allowance is assumed
/// @dev following execution, this contract will hold the zapped USDC
function _zapOutUSDx(
Expand All @@ -190,8 +228,8 @@ contract Zap is Reentrancy, Errors, Flush(msg.sender) {
internal
returns (uint256 zapped)
{
zapped = _buy(SSTATA_SPOT_ID, _amount, _minAmountOut);
zapped = _unwrap(SSTATA_SPOT_ID, zapped, _minAmountOut);
zapped = _buy(SUSDC_SPOT_ID, _amount, _minAmountOut);
zapped = _unwrap(SUSDC_SPOT_ID, zapped, _minAmountOut);
}

/*//////////////////////////////////////////////////////////////
Expand Down
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