chore: downgrade bitcoinj-core to 0.14.7 (#51)

Author: spkjp

build.gradle

@@ -94,7 +94,7 @@ if (project.hasProperty("signing.keyId")) {
 }
 
 dependencies {
-    compile group: 'org.bitcoinj', name: 'bitcoinj-core', version: '0.15.2'
+    compile group: 'org.bitcoinj', name: 'bitcoinj-core', version: '0.14.7'
     compile group: 'org.bouncycastle', name: 'bcprov-jdk15on', version: '1.62'
     compile group: 'com.google.code.gson', name: 'gson', version: '2.8.0'
     compile 'com.google.guava:guava:28.0-jre'

src/main/java/org/arkecosystem/crypto/transactions/Transaction.java

@@ -7,7 +7,6 @@
 import org.arkecosystem.crypto.identities.PrivateKey;
 import org.bitcoinj.core.ECKey;
 import org.bitcoinj.core.Sha256Hash;
-import org.bitcoinj.core.SignatureDecodeException;
 
 import java.lang.reflect.Type;
 import java.nio.ByteBuffer;
@@ -67,11 +66,7 @@ public boolean verify() {
         byte[] signature = Hex.decode(this.signature);
         byte[] bytes = toBytes();
 
-        try {
-            return ECKey.verify(Sha256Hash.hash(bytes), signature, keys.getPubKey());
-        } catch (SignatureDecodeException e) {
-            return false;
-        }
+        return ECKey.verify(Sha256Hash.hash(bytes), signature, keys.getPubKey());
     }
 
     public boolean secondVerify(String secondPublicKey) {
@@ -80,11 +75,7 @@ public boolean secondVerify(String secondPublicKey) {
         byte[] signature = Hex.decode(this.signSignature);
         byte[] bytes = toBytes(false);
 
-        try {
-            return ECKey.verify(Sha256Hash.hash(bytes), signature, keys.getPubKey());
-        } catch (SignatureDecodeException e) {
-            return false;
-        }
+        return ECKey.verify(Sha256Hash.hash(bytes), signature, keys.getPubKey());
     }
 
     public Transaction parseSignatures(String serialized, int startOffset) {

src/main/java/org/arkecosystem/crypto/utils/Message.java

@@ -5,7 +5,6 @@
 import org.arkecosystem.crypto.identities.PrivateKey;
 import org.bitcoinj.core.ECKey;
 import org.bitcoinj.core.Sha256Hash;
-import org.bitcoinj.core.SignatureDecodeException;
 
 import java.util.HashMap;
 import java.util.Map;
@@ -35,11 +34,7 @@ public boolean verify() {
         byte[] signature = Hex.decode(this.signature);
         byte[] messageBytes = Sha256Hash.hash(this.message.getBytes());
 
-        try {
-            return ECKey.verify(messageBytes, signature, keys.getPubKey());
-        } catch (SignatureDecodeException e) {
-            return false;
-        }
+        return ECKey.verify(messageBytes, signature, keys.getPubKey());
     }
 
     public Map toMap() {