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.yamsToUni = mintAmount + excess; uniVars.amountFromReserves = excess; // call swap using entire mint amount and excess; mint 0 to reserves pair.swap(buyTokens, 0, address(this), abi.encode(uniVars)); } else { if (tokens_to_max_slippage > excess) { // uniswap can handle entire reserves uint256 buyTokens = getAmountOut(tokens_to_max_slippage, token1Reserves, token0Reserves); // swap up to slippage limit, taking entire yam reserves, and minting part of total //SlowMist// 增发的多余的代币给 reserves 合约 uniVars.mintToReserves = mintAmount.sub( (tokens_to_max_slippage - excess)); // swap up to slippage limit, taking entire yam reserves, and minting part of total //Slowist// 在 uniswap 中进行兑换，并最终调用 rebase 合约的 uniswapV2Call 函数 pair.swap(buyTokens, 0, address(this), abi.encode(uniVars)); } else { // uniswap cant handle all of excess uint256 buyTokens = getAmountOut(tokens_to_max_slippage, token1Reserves, token0Reserves); uniVars.amountFromReserves = tokens_to_max_slippage; uniVars.mintToReserves = mintAmount; // swap up to slippage limit, taking excess - remainingExcess from reserves, and minting full amount // to reserves pair.swap(buyTokens, 0, address(this), abi.encode(uniVars)); } } } }
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 (责任编辑：admin1) |