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通过对代码分析，buyReserveAndTransfer 首先会计算在 Uniswap 中用于兑换 yCRV 的 YAM 的数量，如果该数量少于 YAM 的铸币数量，则会将多余的增发的 YAM 币给 reserves 合约，这一步是通过 Uniswap 合约调用 rebase 合约的 uniswapV2Call 函数实现的，具体的代码如下： function uniswapV2Call( address sender, uint256 amount0, uint256 amount1, bytes memory data ) public { // enforce that it is coming from uniswap require(msg.sender == uniswap_pair, "bad msg.sender"); // enforce that this contract called uniswap require(sender == address(this), "bad origin"); (UniVars memory uniVars) = abi.decode(data, (UniVars)); YAMTokenInterface yam = YAMTokenInterface(yamAddress); if (uniVars.amountFromReserves > 0) { // transfer from reserves and mint to uniswap yam.transferFrom(reservesContract, uniswap_pair, uniVars.amountFromReserves); if (uniVars.amountFromReserves < uniVars.yamsToUni) { // if the amount from reserves > yamsToUni, we have fully paid for the yCRV tokens // thus this number would be 0 so no need to mint yam.mint(uniswap_pair, uniVars.yamsToUni.sub(uniVars.amountFromReserves)); } } else { // mint to uniswap yam.mint(uniswap_pair, uniVars.yamsToUni); } // mint unsold to mintAmount //SlowMist// 将多余的 YAM 代币分发给 reserves 合约 if (uniVars.mintToReserves > 0) { yam.mint(reservesContract, uniVars.mintToReserves); } // transfer reserve token to reserves if (isToken0) { SafeERC20.safeTransfer(IERC20(reserveToken), reservesContract, amount1); emit TreasuryIncreased(amount1, uniVars.yamsToUni, uniVars.amountFromReserves, uniVars.mintToReserves); } else { SafeERC20.safeTransfer(IERC20(reserveToken), reservesContract, amount0); emit TreasuryIncreased(amount0, uniVars.yamsToUni, uniVars.amountFromReserves, uniVars.mintToReserves); } } (责任编辑：admin) |