szvone/web3PanckSwap

call panckswap V2 interface to query usdt price

web3PanckSwap

Call Panckswap V2 interface to query USDT price.

1. Pom Explanation

You can check the corresponding dependencies on Maven Repository.

<dependency>
    <groupId>org.web3j</groupId>
    <artifactId>core</artifactId>
    <version>5.0.0</version>
</dependency>
<dependency>
    <groupId>com.squareup.okhttp3</groupId>
    <artifactId>okhttp</artifactId>
    <version>4.3.1</version>
</dependency>

2.Compile ABI to Generate Java Code

maven command:

mvn web3j:generate-sources

         <plugin>
                <groupId>org.web3j</groupId>
                <artifactId>web3j-maven-plugin</artifactId>
                <version>4.8.7</version> <!-- 替换为最新版本 -->
                <configuration>
                    <packageName>com.example.contract.abi</packageName>
                    <abiSourceFiles>
                        <directory>src/main/resources</directory>
                        <includes>
                            <include>abi/*.json</include>
                        </includes>
                    </abiSourceFiles>
                    <outputDirectory>
                        <java>src/main/java</java>
                    </outputDirectory>
                </configuration>
            </plugin>

3.RPC Explanation

<h2>Using free BNB network RPC endpoints:</h2>
 <p>PRC1("https://binance.llamarpc.com"), </p>
 <p>PRC2("https://bsc.blockpi.network/v1/rpc/public"),</p>
 <p>PRC3("https://bsc-dataseed3.defibit.io"),</p>
 <p>PRC4("https://rpc.ankr.com/bsc"),</p>
 <p>PRC5("https://bsc-dataseed3.defibit.io");</p>

Note

This is an interface to request PanckSwap for querying token-to-USDT exchange prices. It can be directly deployed to a server.

Demo


Corresponding effect


Application Configuration

app:
  apiKey: ethscan 的apikey or bscscan 的 apikey
  # 代理
  http:
    proxy:
      enable: true
      host: localhost
      port: 7890

4.Code Consideration

public class ContractUtil {
    public static Panckswap getPanckSwap(RpcConfig rpcConfig, String erc20Address) {
        Web3j web3j = EthereumUtil.getWeb3jByRpcUrl(rpcConfig.isEnableProxy(), rpcConfig.getRpcUrl());
        // 此处改为自己钱包的私钥地址
        Credentials credentials = Credentials.create("<privite key>");
        return Panckswap.load(erc20Address, web3j, credentials, new DefaultGasProvider());
    }
}