尝试调用合约

account_balance.go → accountBalance.go

@@ -24,7 +24,7 @@ func main() {
     }
     fmt.Println(balance) // 25893180161173005034
 
-    blockNumber := big.NewInt(0)
+    blockNumber := big.NewInt(37)
     balanceAt, err := client.BalanceAt(context.Background(), account, blockNumber)
     if err != nil {
         log.Fatal(err)
@@ -36,6 +36,7 @@ func main() {
     ethValue := new(big.Float).Quo(fbalance, big.NewFloat(math.Pow10(18)))
     fmt.Println(ethValue) // 25.729324269165216041
 
+    // PendingBalanceAt 获取的是挂起的余额
     pendingBalance, err := client.PendingBalanceAt(context.Background(), account)
     fmt.Println(pendingBalance) // 25729324269165216042
 }

contracts/dutchAuction/DutchAuction.abi

@@ -0,0 +1 @@
+[{"inputs":[{"internalType":"address","name":"_nftAddress","type":"address"},{"internalType":"address payable","name":"_seller","type":"address"},{"internalType":"uint256","name":"_tokenId","type":"uint256"},{"internalType":"uint256","name":"_startingPrice","type":"uint256"},{"internalType":"uint256","name":"_discountRate","type":"uint256"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[{"internalType":"string","name":"message","type":"string"}],"name":"AuctionEnded","type":"error"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"bool","name":"success","type":"bool"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Refund","type":"event"},{"inputs":[],"name":"DURATION","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"buy","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"discountRate","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"endTime","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getBalance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getPrice","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"isSold","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"nftAddress","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"seller","outputs":[{"internalType":"address payable","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"startTime","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"startingPrice","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"tokenId","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"}]

contracts/dutchAuction/DutchAuction.bin

@@ -0,0 +1 @@
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contracts/dutchAuction/IERC721.abi

@@ -0,0 +1 @@
+[{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"transferFrom","outputs":[],"stateMutability":"payable","type":"function"}]

contracts/dutchAuction/dutchAuction.sol

@@ -0,0 +1,64 @@
+// SPDX-License-Identifier: MIT
+pragma solidity 0.8.27;
+
+interface IERC721 {
+    function transferFrom(
+        address from,
+        address to,
+        uint256 tokenId
+    ) external payable;
+}
+
+contract DutchAuction {
+    address immutable public nftAddress;
+    address payable public seller;
+    uint256 immutable public tokenId;
+    bool public isSold;
+    uint256 immutable public startingPrice;
+    uint256 immutable public discountRate;
+    uint256 immutable public startTime;
+    uint256 constant public DURATION = 7 days;
+    uint256 public endTime;
+
+    error AuctionEnded(string message);
+    event Refund(bool success, uint256 amount);
+
+    modifier auctionEnded() {
+        if (block.timestamp >= endTime || isSold) {
+            revert AuctionEnded("Auction ended");
+        }
+        _;
+    }
+
+    constructor(address _nftAddress, address payable _seller, uint256 _tokenId, uint256 _startingPrice, uint256 _discountRate) {
+        nftAddress = _nftAddress;
+        seller = _seller;
+        tokenId = _tokenId;
+        startingPrice = _startingPrice;
+        discountRate = _discountRate;
+        startTime = block.timestamp;
+        endTime = block.timestamp + DURATION;
+        require(startingPrice > discountRate * DURATION, "Starting price should be greater than 0");
+    }
+
+    function getPrice() public view auctionEnded returns (uint256) {
+        return startingPrice - (block.timestamp - startTime) * discountRate;
+    }
+
+    function buy() public auctionEnded payable {
+        uint256 price = getPrice();
+        require(msg.value >= price, "Not enough ether");
+        IERC721(nftAddress).transferFrom{value: price}(seller, msg.sender, tokenId);
+        uint256 refund = msg.value - price;
+        endTime = block.timestamp;
+        isSold = true;
+        if (refund > 0) {
+            (bool success, ) = payable(msg.sender).call{value: refund}("");
+            emit Refund(success, refund);
+        }
+    }
+
+    function getBalance() public view returns (uint256) {
+        return address(msg.sender).balance;
+    }
+}