diff --git a/core/src/main/java/org/bitcorej/chain/iris/IRISStateProvider.java b/core/src/main/java/org/bitcorej/chain/iris/IRISStateProvider.java
index 432fb8f..0b837cc 100644
--- a/core/src/main/java/org/bitcorej/chain/iris/IRISStateProvider.java
+++ b/core/src/main/java/org/bitcorej/chain/iris/IRISStateProvider.java
@@ -1,60 +1,10 @@
 package org.bitcorej.chain.iris;
 
-import org.apache.commons.codec.binary.Base64;
-import org.bitcoinj.core.ECKey;
-import org.bitcoinj.core.Sha256Hash;
 import org.bitcorej.chain.cosmos.CosmosStateProvider;
-import org.bitcorej.utils.ByteUtil;
-import org.bitcorej.utils.NumericUtil;
-import org.bouncycastle.util.encoders.Hex;
-import org.json.JSONObject;
-
-import java.nio.charset.StandardCharsets;
-import java.security.MessageDigest;
-import java.security.NoSuchAlgorithmException;
-import java.util.List;
 
 public class IRISStateProvider extends CosmosStateProvider {
     public IRISStateProvider() {
         super.bech32AccAddr = "iaa";
-        super.transferPrefix = "irishub/bank/Send";
-    }
-
-    @Override
-    public String signRawTransaction(String rawTx, List<String> keys) {
-        JSONObject jsonObject = new JSONObject(rawTx);
-        int accountNumber = jsonObject.getInt("account_number");
-        String chainId = jsonObject.getString("chain_id");
-        String feeDenom = jsonObject.getJSONObject("fees").getString("denom");
-        String feeAmount = jsonObject.getJSONObject("fees").getString("amount");
-        String gas = jsonObject.getString("gas");
-        String memo = jsonObject.getString("memo");
-        int sequence = jsonObject.getInt("sequence");
-        String from = jsonObject.getString("from");
-        String to = jsonObject.getJSONObject("msg").getString("to");
-        String toDenom = jsonObject.getJSONObject("msg").getJSONArray("coins").getJSONObject(0).getString("denom");
-        String toAmount = jsonObject.getJSONObject("msg").getJSONArray("coins").getJSONObject(0).getString("amount");
-
-        String msg = "{\"account_number\":\""+accountNumber+"\",\"chain_id\":\""+chainId+"\",\"fee\":{\"amount\":[{\"amount\":\""+feeAmount+"\",\"denom\":\""+feeDenom+"\"}],\"gas\":\""+gas+"\"},\"memo\":\""+memo+"\",\"msgs\":[{\"inputs\":[{\"address\":\""+from+"\",\"coins\":[{\"amount\":\""+toAmount+"\",\"denom\":\""+toDenom+"\"}]}],\"outputs\":[{\"address\":\""+to+"\",\"coins\":[{\"amount\":\""+toAmount+"\",\"denom\":\""+toDenom+"\"}]}]}],\"sequence\":\""+sequence+"\"}";
-
-        MessageDigest digest = null;
-        try {
-            digest = MessageDigest.getInstance("SHA-256");
-        } catch (NoSuchAlgorithmException e) {
-            e.printStackTrace();
-            return null;
-        }
-        byte[] hash = digest.digest(
-                msg.getBytes(StandardCharsets.UTF_8));
-        String sha256hex = new String(Hex.encode(hash));
-
-        ECKey ecKey = ECKey.fromPrivate(NumericUtil.hexToBytes(keys.get(0)));
-        ECKey.ECDSASignature sig = ecKey.sign(Sha256Hash.wrap(sha256hex));
-
-        byte[] signature = ByteUtil.concat(sig.r.toByteArray(), sig.s.toByteArray());
-
-        String sigBase64 = Base64.encodeBase64String(ByteUtil.trimLeadingZeroes(signature));
-        String pub = Base64.encodeBase64String(ecKey.getPubKey());
-        return "{\"tx\":{\"msg\":[{\"type\":\"irishub/bank/Send\",\"value\":{\"type\":\"irishub/bank/Send\",\"inputs\":[{\"address\":\""+from+"\",\"coins\":[{\"denom\":\""+toDenom+"\",\"amount\":\""+toAmount+"\"}]}],\"outputs\":[{\"address\":\""+to+"\",\"coins\":[{\"denom\":\""+toDenom+"\",\"amount\":\""+toAmount+"\"}]}]}}],\"fee\":{\"amount\":[{\"denom\":\"" + feeDenom + "\",\"amount\":\"" + feeAmount + "\"}],\"gas\":\"" + gas + "\"},\"signatures\":[{\"pub_key\":{\"type\":\"tendermint/PubKeySecp256k1\",\"value\":\"" + pub + "\"},\"signature\":\"" + sigBase64 + "\",\"account_number\":\""+accountNumber+"\",\"sequence\":\""+sequence+"\"}],\"memo\":\"" + memo + "\"}}";
+        super.transferPrefix = "cosmos-sdk/MsgSend";
     }
 }
diff --git a/examples/src/main/java/org/bitcorej/examples/ExampleKeyGen.java b/examples/src/main/java/org/bitcorej/examples/ExampleKeyGen.java
new file mode 100644
index 0000000..d7648f3
--- /dev/null
+++ b/examples/src/main/java/org/bitcorej/examples/ExampleKeyGen.java
@@ -0,0 +1,2 @@
+package org.bitcorej.examples;public class ExampleKeyGen {
+}