使用LSD铸造unshETH

以下部分详细说明如何使用支持的LSD和WETH铸造unshETH。

我们假设inputAmount（以wei单位表示）和inputLSDaddress对应于用于铸造unshETH的相应数量和合约地址的LSD。

所需的合约和接口

unshETH: 0x0Ae38f7E10A43B5b2fB064B42a2f4514cbA909ef

LSDVault: 0x51A80238B5738725128d3a3e06Ab41c1d4C05C74

//solidity
interface ILSDVault {
  function getPrice(address lsd) public view returns(uint256);
  function swapperAddress() external view returns (address);
  function unshethZapAddress() external view returns (address);
  function supportedLSDs(uint256 index) external view returns (address);
}

//ethers.js
const ILSDVaultABI = [
  'function getPrice(address lsd) public view returns (uint256)',
  'function swapperAddress() external view returns (address)',
  'function unshethZapAddress() external view returns (address)',
  'function supportedLSDs(uint256 index) external view returns (address)',
]
const LSDVaultAddress = '0x51A80238B5738725128d3a3e06Ab41c1d4C05C74'
const LSDVaultContract = new ethers.Contract(LSDVaultAddress, ILSDVault, provider)

vdAMM

//solidity
address vdaAMMAddress = ILSDVault(LSDVaultAddress).swapperAddress();

//ethers.js
const vdAmmAddress = await LSDVaultContract.swapperAddress()

vdAMM地址目前为： 0x0Ae38f7E10A43B5b2fB064B42a2f4514cbA909ef.

然而，这在未来可能会发生变化，因此应该从LSDVault合约中动态调用。

//solidity
interface IVdAmm {
    function getDepositFee(uint256 lsdAmountIn, address lsd) external returns(uint256, uint256);
}

//ethers.js
const IVdAmmABI = ['function getDepositFee(uint256 lsdAmountIn, address lsd) external returns (uint256, uint256)']
const vdAmmContract = new ethers.Contract(vdAmmAddress, IVdAmm, provider)

unshETHZap

//solidity
address unshethZapAddress = ILSDVault(LSDVaultAddress).unshethZapAddress();

//ethers.js
const unshETHZapAddress = await LSDVaultContract.unshethZapAddress()

unshETHZap地址目前为： 0x51A80238B5738725128d3a3e06Ab41c1d4C05C74.

然而，这在未来可能会发生变化，因此应该从LSDVault合约中动态调用。

//solidity
interface IunshETHZap {
   function deposit_lsd(address lsdAddress, uint256 amount) external;
}

//ethers.js
const IunshETHZapABI = ['function deposit_lsd(address lsdAddress, uint256 amount) external']
const unshETHZapContract = new ethers.Contract(unshETHZapAddress, IunshETHZap, provider)

支持的LSDs

// solidity
uint256 i = 0;
address lsdAddress;
while (true) {
  lsdAddress = ILSDVault(LSDVaultAddress).supportedLSDs(i);
  if (lsdAddress == address(0)) {
    break;
  }
  // Process the LSD address here
  i++;
}

// ethers.js
let i = 0
let lsdAddress
while (true) {
  lsdAddress = await LSDVaultContract.supportedLSDs(i)
  if (lsdAddress === '0x0000000000000000000000000000000000000000') {
    break
  }
  console.log(`LSD Address ${i}: ${lsdAddress}`)
  i++
}

目前支持的LSDs如下：

sfrxETH: 0xac3e018457b222d93114458476f3e3416abbe38f

rETH: 0xae78736cd615f374d3085123a210448e74fc6393

wstETH: 0x7f39c581f595b53c5cb19bd0b3f8da6c935e2ca0

cbETH: 0xbe9895146f7af43049ca1c1ae358b0541ea49704

WETH: 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2

ankrETH: 0xE95A203B1a91a908F9B9CE46459d101078c2c3cb

swETH: 0xf951E335afb289353dc249e82926178EaC7DEd78

未来将添加更多LSDs。

价格发现

1. 获取存款费用（以输入的LSD为单位）

//solidity
(uint256 depositFee, ) = IVdAmm(vdAmmAddress).getDepositFee(inputAmount, inputLSDAddress);

//ethers.js
const [depositFee] = await vdAmmContract.getDepositFee(inputAmount, inputLSDAddress)

2. 获取LSD相对于unshETH的价格

//solidity
uint256 price = ILSDVault(LSDVaultAddress).getPrice(inputLSDAddress);

//ethers.js
const price = await LSDVaultContract.getPrice(inputLSDAddress)

3. 计算要铸造的最终unshETH数量

//solidity
uint256 unshETHMintedInWei = price*(inputAmount-depositFee)/1e18

//ethers.js
const unshETHMintedInWei = price.mul(inputAmount.sub(depositFee)).div(1e18)

提交交易

1. 批准LSD可以被unshETHZap使用

//solidity
IERC20(inputLSDAddress).approve(unshETHZapAddress, inputAmount);

//ethers.js
const IERC20ABI = ['function approve(address spender, uint256 amount) external returns (bool)']
const IERC20Contract = new ethers.Contract(inputLSDAddress, IERC20ABI, provider)
await IERC20Contract.approve(unshETHZapAddress, inputAmount)

2. 调用unshETHZap的存款LSD函数

//solidity
IunshETHZap(unshETHZapAddress).deposit_lsd(inputLSDAddress, inputAmount)

//ethers.js
await unshETHZapContract.deposit_lsd(inputLSDAddress, inputAmount)