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TokenBalanceTask.java
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TokenBalanceTask.java
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package com.ethjava;
import com.ethjava.utils.Environment;
import org.web3j.protocol.Web3j;
import org.web3j.protocol.http.HttpService;
import java.math.BigDecimal;
import java.util.ArrayList;
import java.util.List;
/**
* 批量查询token余额
*/
public class TokenBalanceTask {
public class Token {
public String contractAddress;
public int decimals;
public String name;
public Token(String contractAddress) {
this.contractAddress = contractAddress;
this.decimals = 0;
}
public Token(String contractAddress, int decimals) {
this.contractAddress = contractAddress;
this.decimals = decimals;
}
}
private static Web3j web3j;
//要查询的token合约地址
private static List<Token> tokenList;
//要查询的钱包地址
private static List<String> addressList;
public static void main(String[] args) {
web3j = Web3j.build(new HttpService(Environment.RPC_URL));
loadData();
//如果没有decimals则需要请求
requestDecimals();
requestName();
processTask();
}
private static void loadData() {
tokenList = new ArrayList<>();
// TODO: 2018/3/14 add...
addressList = new ArrayList<>();
// TODO: 2018/3/14 add...
}
private static void requestDecimals() {
for (Token token : tokenList) {
token.decimals = TokenClient.getTokenDecimals(web3j, token.contractAddress);
}
}
private static void requestName() {
for (Token token : tokenList) {
token.name = TokenClient.getTokenName(web3j, token.contractAddress);
}
}
private static void processTask() {
for (String address : addressList) {
for (Token token : tokenList) {
BigDecimal balance = new BigDecimal(TokenClient.getTokenBalance(web3j, address, token.contractAddress));
balance.divide(BigDecimal.TEN.pow(token.decimals));
System.out.println("address " + address + " name " + token.name + " balance " + balance);
}
}
}
}