This package was developed for sending and receiving RPC requests. It is using jackson library to convert between java and json objects.
It has three sub-packages
- methods
- request
- response
The most of the method classes have their own request classes where are kept the parameters and response class which is a method’s return type.
You can download maven project here.
Click the Code button and then download zip.
Unzip it to workspace directory and import as maven project.
The only SendRequest class’ send() method sends request to Electrum so you need to configure it in accordance your Electrum RPC configuration.
package electrum.methods;
import java.io.IOException;
import java.io.InputStream;
import java.net.URI;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;
import java.net.http.HttpRequest.BodyPublishers;
import java.util.Base64;
public class SendRequest {
public synchronized InputStream send(String json) {
HttpClient client = HttpClient.newHttpClient();
// replace to your rpcuser and rpcpassowrd
String credentials = "user" + ":" + "t";
String auth = "Basic " + Base64.getEncoder().encodeToString(credentials.getBytes());
HttpRequest request = HttpRequest.newBuilder()
.uri(URI.create("http://127.0.0.1:7777"))
.POST(BodyPublishers.ofString(json))
.setHeader("Content-Type", "application/x-www-form-urlencoded")
.setHeader("Authorization", auth)
.build();
HttpResponse<InputStream> response = null;
try {
response = client.send(request, HttpResponse.BodyHandlers.ofInputStream());
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return response.body();
}
}
There are some examples in main().
package electrum.demo;
import java.util.Arrays;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import electrum.methods.Deserialize;
import electrum.methods.GetFeeRate;
import electrum.methods.GetOnChainHistory;
import electrum.methods.ListAddresses;
import electrum.methods.PayTo;
import electrum.methods.PayToMany;
import electrum.response.Output;
import electrum.response.Result;
import electrum.response.Transaction;
public class Main {
public static void main(String[] args) {
ObjectMapper objectMapper = new ObjectMapper();
//getting feerate
int feerate = new GetFeeRate().getFeeRate();
System.out.println("feerate = "+ feerate);
//getting history
Result result = new GetOnChainHistory().getResult();
System.out.println("wallet balance = "+result.getSummary().getBegin().getBTC_balance()+" date = "+result.getSummary().getBegin().getDate());
System.out.println("wallet balance = "+result.getSummary().getEnd().getBTC_balance()+" date = "+result.getSummary().getEnd().getDate());
System.out.println("btc_incoming = "+result.getSummary().getFlow().getbTC_incoming());
Transaction[] transactions = result.getTransactions();
for(Transaction transaction : transactions) {
System.out.println("bc_value = "+transaction.getBc_value());
System.out.println("incoming = "+transaction.getIncoming());
System.out.println("conformations = "+transaction.getConfirmations());
System.out.println("txid = "+transaction.getTxid());
for(Output output : transaction.getOutputs()) {
System.out.println("address = " + output.getAddress());
}
System.out.println("Bc_value = "+transaction.getBc_value());
}
//deserialisig the code which you get when use payTo() or payToMany()
Output[] outputs = new Deserialize().deserialize("0200000000010126a65160de2bcc1e46308209670ed320ff23550fdb31b96a661608ede6a49d000000000000fdffffff02ac260000000000001600140ab8ce8b4c63186710c90ed4cbb14f64fecac7e310270000000000001600144fda16bb1c1d870875f54b27d705c03f89f92d4702473044022067ff1cccfaec698aeb81b74c9ff5872a4769e2e705865ad1dcbee78ce37e8cea02202c194a4d5b4e54f396c5482523fe001e31acbd75e966c4b4d29cd931df6c155a0121025ad75aac47e461cfebc26e2d3d1a53d90cc4f48556e1a89ceda06206f61a6d44493e2500");
for(Output output : outputs) {
System.out.println("address = " + output.getAddress());
//System.out.println("value_sats = " + output.getValue_sats());
}
// paying
String txid;
String[][] outputs1 = {{"tb1qq43jsy5q46sf3wljg8l7luqrjwjczeqhywjjfj", "0.0008"}, {"tb1qzs6fq7j9wn4x4w9daruvke5793fkw4yty03u5f", "0.0009"}, {"tb1q3pctvpvyzm799zmtw894achdxdw0l86zpcceu2", "0.0006"}};
txid = new PayToMany().payToMany(outputs1);
txid = new PayToMany().payToMany(outputs1);
System.out.println(txid);
txid = new PayTo().payTo("tb1qy8y23vgyzkgq438l4xpy0kp6dscp0yvkxt224l", 0.0001);
System.out.println(txid);
// getting electrum addresses
String[] strings = new ListAddresses().listAddresses();
System.out.println(Arrays.toString(strings));
try {
System.out.println(objectMapper.writeValueAsString(transactions[0].getOutputs()));
} catch (JsonProcessingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
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