Rinkeby Uniswap swapExactETHForTokens - 失败并出现错误 'UniswapV2Router: EXPIRED'
Rinkeby Uniswap swapExactETHForTokens - Fail with error 'UniswapV2Router: EXPIRED'
理想情况下,我需要 web3 或 ethers 中正确交易格式的示例,
它可以使用 Rinkeby 上的 UniswapV2Router 将 WETH 换成 ERC20 或将 ERC20 换成 WETH,
我想,我有错误的交易格式,也许是因为 gasPrice 或 gasLimit,但我不明白它发生在哪里,所以我尝试增加 gasPrice(100 Gwei) 和 gasLimit(8,000,000) 但它仍然失败,我还将“amountOutMin”减少到 1,
交易截止时间是 20 分钟,但几秒钟后就失败了
请查看代码和详细信息
将 1 个以太币换成 UNI(发件人地址上的 WETH 和 ETH 余额超过 5 个)
交易截止时间:20分钟
UNI地址:0x1f9840a85d5aF5bf1D1762F925BDADdC4201F984
UniswapV2Router:0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D
另一个小问题,当您将 ETH 换成 ERC20 时,是从发送者余额中提取 WETH 还是 ETH?
const swap = async () => {
try{
const chainId = ChainId.RINKEBY
const tokenAddress = "0x1f9840a85d5aF5bf1D1762F925BDADdC4201F984"
const uni = await Fetcher.fetchTokenData(chainId, tokenAddress)
const weth = WETH[chainId]
const pair = await Fetcher.fetchPairData(uni, weth)
const route = new Route([pair], weth)
const trade = new Trade(route, new TokenAmount(weth, '100000000000000000'), TradeType.EXACT_INPUT)
console.log('1 WETH for', route.midPrice.toSignificant(6), ' UNI')
console.log('1 UNI for', route.midPrice.invert().toSignificant(6), ' WETH')
console.log('Trade price 1 WETH for ', trade.executionPrice.toSignificant(6), ' UNI')
const accounts = await web3.eth.getAccounts()
const account = accounts[0]
const slippageTolerance = new Percent('20', '100')
const path = [weth.address, uni.address ]
const to = account
// function toHex(currencyAmount) {
// return `0x${currencyAmount.raw.toString(16)}`
// }
// const amountOutMin = toHex(trade.minimumAmountOut(slippageTolerance))
// const value = toHex(trade.inputAmount)
const uniswap = await new web3.eth.Contract(abi, "0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D")
const now = moment().unix()
const DEADLINE = now + 60 *20
console.log('Sending...')
let txn = await uniswap.methods.swapExactETHForTokens( 1, path, to, DEADLINE ).send( {
from: account,
gasLimit: 8000000,
gasPrice: web3.utils.toWei('100', 'Gwei'),
value: web3.utils.toWei('1', 'Ether')
})
console.log(`Txn: https://rinkeby.etherscan.io/tx/${txn.transactionHash}`)
}catch(e){
console.log(e)
}
}
module.exports = 交换
rinkeby etherscan 上的交易结果:
控制台:“错误:事务已被 EVM 还原”
提前致谢
这里是一个将ETH兑换成UNI的例子。我正在使用 ethJS。
const WETH_ADDRESS = "0xc778417e063141139fce010982780140aa0cd5ab";
const UNI_ADDRESS = "0x1f9840a85d5aF5bf1D1762F925BDADdC4201F984";
const path = [WETH_ADDRESS, UNI_ADDRESS];
const ethAmount = ethers.utils.parseEther("0.1");
const nowInSeconds = Math.floor(Date.now() / 1000)
const expiryDate = nowInSeconds + 900;
const txn = await uniswapV2Contract.swapExactETHForTokens(
0,
path,
user.address,
expiryDate,
{
gasLimit: 1000000,
gasPrice: ethers.utils.parseUnits("10", "gwei"),
value: ethAmount
}
)
const res = await txn.wait();
当您调用 swapExactETHForTokens 方法时,它将使用 ETH 而不是 WETH。如果您想与 WETH 交换,您应该调用 swapExactTokensForTokens。
理想情况下,我需要 web3 或 ethers 中正确交易格式的示例, 它可以使用 Rinkeby 上的 UniswapV2Router 将 WETH 换成 ERC20 或将 ERC20 换成 WETH, 我想,我有错误的交易格式,也许是因为 gasPrice 或 gasLimit,但我不明白它发生在哪里,所以我尝试增加 gasPrice(100 Gwei) 和 gasLimit(8,000,000) 但它仍然失败,我还将“amountOutMin”减少到 1, 交易截止时间是 20 分钟,但几秒钟后就失败了
请查看代码和详细信息
将 1 个以太币换成 UNI(发件人地址上的 WETH 和 ETH 余额超过 5 个) 交易截止时间:20分钟 UNI地址:0x1f9840a85d5aF5bf1D1762F925BDADdC4201F984 UniswapV2Router:0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D 另一个小问题,当您将 ETH 换成 ERC20 时,是从发送者余额中提取 WETH 还是 ETH?
const swap = async () => {
try{
const chainId = ChainId.RINKEBY
const tokenAddress = "0x1f9840a85d5aF5bf1D1762F925BDADdC4201F984"
const uni = await Fetcher.fetchTokenData(chainId, tokenAddress)
const weth = WETH[chainId]
const pair = await Fetcher.fetchPairData(uni, weth)
const route = new Route([pair], weth)
const trade = new Trade(route, new TokenAmount(weth, '100000000000000000'), TradeType.EXACT_INPUT)
console.log('1 WETH for', route.midPrice.toSignificant(6), ' UNI')
console.log('1 UNI for', route.midPrice.invert().toSignificant(6), ' WETH')
console.log('Trade price 1 WETH for ', trade.executionPrice.toSignificant(6), ' UNI')
const accounts = await web3.eth.getAccounts()
const account = accounts[0]
const slippageTolerance = new Percent('20', '100')
const path = [weth.address, uni.address ]
const to = account
// function toHex(currencyAmount) {
// return `0x${currencyAmount.raw.toString(16)}`
// }
// const amountOutMin = toHex(trade.minimumAmountOut(slippageTolerance))
// const value = toHex(trade.inputAmount)
const uniswap = await new web3.eth.Contract(abi, "0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D")
const now = moment().unix()
const DEADLINE = now + 60 *20
console.log('Sending...')
let txn = await uniswap.methods.swapExactETHForTokens( 1, path, to, DEADLINE ).send( {
from: account,
gasLimit: 8000000,
gasPrice: web3.utils.toWei('100', 'Gwei'),
value: web3.utils.toWei('1', 'Ether')
})
console.log(`Txn: https://rinkeby.etherscan.io/tx/${txn.transactionHash}`)
}catch(e){
console.log(e)
}
}
module.exports = 交换
rinkeby etherscan 上的交易结果:
控制台:“错误:事务已被 EVM 还原”
提前致谢
这里是一个将ETH兑换成UNI的例子。我正在使用 ethJS。
const WETH_ADDRESS = "0xc778417e063141139fce010982780140aa0cd5ab";
const UNI_ADDRESS = "0x1f9840a85d5aF5bf1D1762F925BDADdC4201F984";
const path = [WETH_ADDRESS, UNI_ADDRESS];
const ethAmount = ethers.utils.parseEther("0.1");
const nowInSeconds = Math.floor(Date.now() / 1000)
const expiryDate = nowInSeconds + 900;
const txn = await uniswapV2Contract.swapExactETHForTokens(
0,
path,
user.address,
expiryDate,
{
gasLimit: 1000000,
gasPrice: ethers.utils.parseUnits("10", "gwei"),
value: ethAmount
}
)
const res = await txn.wait();
当您调用 swapExactETHForTokens 方法时,它将使用 ETH 而不是 WETH。如果您想与 WETH 交换,您应该调用 swapExactTokensForTokens。