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GoodforGodGoodforGod
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Providers refactored
Contract provider implementation Basic java native HttpExecutor implementation Basic provider DTOs provided
1 parent 1f76be1 commit 68bbb4c

26 files changed

+544
-221
lines changed

‎pom.xml

Lines changed: 17 additions & 40 deletions
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@@ -1,5 +1,4 @@
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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
@@ -8,58 +7,36 @@
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<artifactId>etherscan</artifactId>
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<version>1.0.0</version>
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<name>etherscan</name>
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<!-- FIXME change it to the project's website -->
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<url>http://www.example.com</url>
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<name>etherscan-api</name>
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<properties>
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<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
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<maven.compiler.source>1.7</maven.compiler.source>
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<maven.compiler.target>1.7</maven.compiler.target>
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<maven.compiler.source>1.8</maven.compiler.source>
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<maven.compiler.target>1.8</maven.compiler.target>
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</properties>
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<dependencies>
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<dependency>
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<groupId>junit</groupId>
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<artifactId>junit</artifactId>
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<version>4.11</version>
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<version>4.12</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.apache.httpcomponents</groupId>
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<artifactId>httpclient</artifactId>
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<version>4.5.6</version>
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</dependency>
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<dependency>
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<groupId>com.jsoniter</groupId>
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<artifactId>jsoniter</artifactId>
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<version>0.9.19</version>
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</dependency>
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</dependencies>
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<build>
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<pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
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<plugins>
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<plugin>
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<artifactId>maven-clean-plugin</artifactId>
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<version>3.0.0</version>
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</plugin>
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<!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_jar_packaging -->
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<plugin>
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<artifactId>maven-resources-plugin</artifactId>
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<version>3.0.2</version>
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</plugin>
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<plugin>
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<artifactId>maven-compiler-plugin</artifactId>
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<version>3.7.0</version>
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</plugin>
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<plugin>
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<artifactId>maven-surefire-plugin</artifactId>
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<version>2.20.1</version>
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</plugin>
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<plugin>
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<artifactId>maven-jar-plugin</artifactId>
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<version>3.0.2</version>
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</plugin>
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<plugin>
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<artifactId>maven-install-plugin</artifactId>
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<version>2.5.2</version>
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</plugin>
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<plugin>
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<artifactId>maven-deploy-plugin</artifactId>
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<version>2.8.2</version>
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</plugin>
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</plugins>
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</pluginManagement>
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</build>
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</project>

‎src/main/java/io/api/App.java

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Original file line numberDiff line numberDiff line change
@@ -1,10 +1,15 @@
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package io.api;
22

3+
import io.api.core.EtherScanApi;
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35
/**
46
*
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*/
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public class App {
79
public static void main(String[] args) {
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System.out.println("Hello World!");
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EtherScanApi api = new EtherScanApi(args[0]);
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String abi = api.contract().contractAbi("0xBB9bc244D798123fDe783fCc1C72d3Bb8C189413");
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int i = abi.length();
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}
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}

‎src/main/java/io/api/core/BasicProvider.java

Lines changed: 0 additions & 19 deletions
This file was deleted.

‎src/main/java/io/api/core/EtherScanApi.java

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package io.api.core;
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import io.api.core.impl.AccountProvider;
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import io.api.core.impl.ContractProvider;
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import io.api.model.EthereumNetwork;
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import java.util.HashMap;
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import java.util.Map;
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/**
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* ! NO DESCRIPTION !
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*
@@ -8,4 +15,38 @@
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*/
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public class EtherScanApi {
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private static final Map<String, String> HEADERS = new HashMap<>();
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static {
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HEADERS.put("accept-language", "en,ru;q=0.9");
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HEADERS.put("accept-encoding", "gzip, deflate, br");
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HEADERS.put("user-agent", "Mozilla/5.0 (Windows NT 10.0; WOW64) Chrome/68.0.3440.106");
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HEADERS.put("cache-control", "max-age=0");
25+
}
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private final ContractProvider contract;
28+
private final AccountProvider account;
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public EtherScanApi(final String apiKey) {
31+
this(apiKey, EthereumNetwork.MAINNET);
32+
}
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public EtherScanApi(final String apiKey,
35+
final EthereumNetwork network) {
36+
final EthereumNetwork usedNetwork = (network == null)
37+
? EthereumNetwork.MAINNET
38+
: network;
39+
40+
final String url = "https://" + usedNetwork.getDomain() + ".etherscan.io/api" + "?apikey=" + apiKey;
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this.contract = new ContractProvider(url, HEADERS);
42+
this.account = new AccountProvider(url, HEADERS);
43+
}
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public ContractProvider contract() {
46+
return contract;
47+
}
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public AccountProvider account() {
50+
return account;
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}
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}

‎src/main/java/io/api/core/IAccountProvider.java

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package io.api.core;
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import io.api.model.Balance;
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import io.api.model.Block;
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import io.api.model.Transaction;
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import java.util.List;
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import java.util.Optional;
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/**
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* EtherScan - API Descriptions
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* https://etherscan.io/apis#accounts
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*
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* @author GoodforGod
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* @since 28.10.2018
16+
*/
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public interface IAccountProvider {
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/** Address ETH balance */
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Optional<Balance> balance(String address);
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/**
23+
* Maximum 20 address for batch request
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* If address > 20, then there will be more than 1 request
25+
*/
26+
List<Balance> balances(List<String> addresses);
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/** All txs */
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List<Transaction> txs(String address);
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/** Only last 10000 txs */
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List<Transaction> txs(String address, int startBlock);
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/** Only last 10000 txs */
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List<Transaction> txs(String address, int startBlock, int endBlock);
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/** All internal txs */
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List<Transaction> txsInternal(String address);
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/** Only last 10000 internal txs */
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List<Transaction> txsInternal(String address, int startBlock);
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/** Only last 10000 internal txs */
40+
List<Transaction> txsInternal(String address, int startBlock, int endBlock);
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/** All token txs */
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List<Transaction> txsToken(String address);
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/** Only last 10000 token txs */
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List<Transaction> txsToken(String address, int startBlock);
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/** Only last 10000 token txs */
47+
List<Transaction> txsToken(String address, int startBlock, int endBlock);
48+
49+
/** All blocks mined by address */
50+
List<Block> minedBlocks(String address);
51+
}

‎src/main/java/io/api/core/contract/IContractProvider.java renamed to ‎src/main/java/io/api/core/IContractProvider.java

Lines changed: 3 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -1,4 +1,4 @@
1-
package io.api.core.contract;
1+
package io.api.core;
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33
/**
44
* ! NO DESCRIPTION !
@@ -8,4 +8,6 @@
88
*/
99
public interface IContractProvider {
1010

11+
/** Get Verified Contract Sources */
12+
String contractAbi(String address);
1113
}

‎src/main/java/io/api/core/account/IAccountProvider.java

Lines changed: 0 additions & 39 deletions
This file was deleted.

‎src/main/java/io/api/core/account/impl/AccountProvider.java

Lines changed: 0 additions & 16 deletions
This file was deleted.

‎src/main/java/io/api/core/contract/impl/ContractProvider.java

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This file was deleted.

‎src/main/java/io/api/core/executor/HttpExecutor.java

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package io.api.core.executor;
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import java.io.BufferedReader;
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import java.io.IOException;
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import java.io.InputStreamReader;
6+
import java.net.HttpURLConnection;
7+
import java.net.URL;
8+
import java.util.Map;
9+
10+
import static java.net.HttpURLConnection.HTTP_MOVED_PERM;
11+
import static java.net.HttpURLConnection.HTTP_MOVED_TEMP;
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13+
/**
14+
* ! NO DESCRIPTION !
15+
*
16+
* @author GoodforGod
17+
* @since 28.10.2018
18+
*/
19+
public class HttpExecutor {
20+
21+
public String get(final String urlAsString,
22+
final Map<String, String> headers) throws IOException {
23+
24+
final URL url = new URL(urlAsString);
25+
final HttpURLConnection connection = (HttpURLConnection) url.openConnection();
26+
connection.setRequestMethod("GET");
27+
headers.forEach(connection::setRequestProperty);
28+
connection.setConnectTimeout(30000);
29+
30+
final int status = connection.getResponseCode();
31+
if (status == HTTP_MOVED_TEMP || status == HTTP_MOVED_PERM) {
32+
final String location = connection.getHeaderField("Location");
33+
return get(location, headers);
34+
}
35+
36+
final BufferedReader in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
37+
String inputLine;
38+
final StringBuilder content = new StringBuilder();
39+
while ((inputLine = in.readLine()) != null)
40+
content.append(inputLine);
41+
42+
in.close();
43+
connection.disconnect();
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return content.toString();
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}
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}

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