add ExplorerApi

Author: zeroleak

java/com/samourai/wallet/api/explorer/ExplorerApi.java

@@ -0,0 +1,40 @@
+package com.samourai.wallet.api.explorer;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class ExplorerApi {
+  private Logger log = LoggerFactory.getLogger(ExplorerApi.class);
+
+  private static final String EXPLORER_MAINNET = "https://blockstream.info/";
+  private static final String EXPLORER_TESTNET = "https://blockstream.info/testnet/";
+
+  private static final String URL_TX = "tx/";
+  private static final String URL_ADDRESS = "address/";
+
+  private boolean testnet;
+
+  public ExplorerApi(boolean testnet) {
+    this.testnet = testnet;
+  }
+
+  public String getUrl() {
+    return testnet ? EXPLORER_TESTNET : EXPLORER_MAINNET;
+  }
+
+  public String getUrlTx() {
+    return getUrl()+URL_TX;
+  }
+
+  public String getUrlTx(String txid) {
+    return getUrl()+URL_TX+txid;
+  }
+
+  public String getUrlAddress() {
+    return getUrl()+URL_ADDRESS;
+  }
+
+  public String getUrlAddress(String address) {
+    return getUrl()+URL_ADDRESS+address;
+  }
+}