package de.petendi.ethereum.android.sample;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.text.TextUtils;
import android.util.Base64;
import android.view.View;
import android.widget.AutoCompleteTextView;
import android.widget.Button;
import android.widget.Toast;
import java.lang.reflect.Field;
import java.math.BigInteger;
import java.util.HashMap;
import de.petendi.ethereum.android.EthereumAndroid;
import de.petendi.ethereum.android.EthereumAndroidFactory;
import de.petendi.ethereum.android.EthereumNotInstalledException;
import de.petendi.ethereum.android.Utils;
import de.petendi.ethereum.android.contract.PendingTransaction;
import de.petendi.ethereum.android.contract.model.ResponseNotOKException;
import de.petendi.ethereum.android.sample.contract.SimpleOwnedStorage;
import de.petendi.ethereum.android.service.model.RpcCommand;
import de.petendi.ethereum.android.service.model.WrappedRequest;
import de.petendi.ethereum.android.service.model.WrappedResponse;
public class SimpleStorageActivity extends AppCompatActivity {
private enum State {
NO_CONTRACT_DEPLOYED,
CONTRACT_NOT_MINED_YET,
CONTRACT_DEPLOYED
}
private final static String CONTRACT_BYTECODCE = "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";
private final static String CONTRACT_ABI = "[{\"constant\":false,\"inputs\":[{\"name\":\"d\",\"type\":\"string\"}],\"name\":\"set\",\"outputs\":[],\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"get\",\"outputs\":[{\"name\":\"\",\"type\":\"string\"}],\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"currentOwner\",\"outputs\":[{\"name\":\"\",\"type\":\"address\"}],\"type\":\"function\"},{\"inputs\":[{\"name\":\"d\",\"type\":\"string\"}],\"type\":\"constructor\"}]";
private static final String SIMPLE_STORAGE_PREFS = "simple_storage";
private static final String CONTRACT_ADDRESS = "contractAddress";
private static final String TRANSACTION = "transaction";
private final static int REQUEST_CODE_DEPLOY = 753;
private final static int REQUEST_CODE_WRITE = 754;
private EthereumAndroid ethereumAndroid;
private State currentState = State.NO_CONTRACT_DEPLOYED;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//this is a hack to disable the signature check so that it also connects
//to development versions of Ethereum Android
try {
Field devField = EthereumAndroidFactory.class.getDeclaredField("DEV");
devField.setAccessible(true);
devField.set(null, true);
} catch (NoSuchFieldException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
}
initialize();
setContentView(R.layout.activity_simple_storage);
applyState();
}
private void initialize() {
EthereumAndroidFactory ethereumAndroidFactory = new EthereumAndroidFactory(this);
try {
ethereumAndroid = ethereumAndroidFactory.create();
} catch (EthereumNotInstalledException e) {
Toast.makeText(this, R.string.ethereum_ethereum_not_installed, Toast.LENGTH_LONG).show();
finish();
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == REQUEST_CODE_DEPLOY) {
if (resultCode == RESULT_OK) {
String transaction = data.getStringExtra(TRANSACTION);
Toast.makeText(this, "deploy contract transaction: " + transaction, Toast.LENGTH_LONG).show();
getSharedPreferences(SIMPLE_STORAGE_PREFS, MODE_PRIVATE).edit().putString(TRANSACTION, transaction).commit();
applyState();
} else {
String error = data.getStringExtra("error");
Toast.makeText(this, "deploying contract failed " + error, Toast.LENGTH_LONG).show();
}
} else if (requestCode == REQUEST_CODE_WRITE) {
if (resultCode == RESULT_OK) {
String transaction = data.getStringExtra(TRANSACTION);
Toast.makeText(this, "write value transaction " + transaction, Toast.LENGTH_LONG).show();
getSharedPreferences(SIMPLE_STORAGE_PREFS, MODE_PRIVATE).edit().putString(TRANSACTION, transaction).commit();
} else {
String error = data.getStringExtra("error");
Toast.makeText(this, "write value failed " + error, Toast.LENGTH_LONG).show();
}
}
}
private void applyState() {
SharedPreferences prefs = getSharedPreferences(SIMPLE_STORAGE_PREFS, MODE_PRIVATE);
String transaction = prefs.getString(TRANSACTION, null);
if (transaction == null) {
currentState = State.NO_CONTRACT_DEPLOYED;
} else {
String contractAddress = prefs.getString(CONTRACT_ADDRESS, null);
if (contractAddress == null) {
currentState = State.CONTRACT_NOT_MINED_YET;
} else {
currentState = State.CONTRACT_DEPLOYED;
}
}
Button buttonRead = (Button) findViewById(R.id.read);
buttonRead.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
readValue();
}
});
Button buttonWrite = (Button) findViewById(R.id.write);
buttonWrite.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
writeValue();
}
});
Button buttonDeploy = (Button) findViewById(R.id.deploy_contract);
buttonDeploy.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
deployContract();
}
});
Button buttonReadReceipt = (Button) findViewById(R.id.read_receipt);
buttonReadReceipt.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
readContractAddress();
}
});
Button buttonReadOwner = (Button) findViewById(R.id.readOwner);
buttonReadOwner.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
readOwner();
}
});
AutoCompleteTextView valueTextview = (AutoCompleteTextView) findViewById(R.id.storage_input);
switch (currentState) {
case NO_CONTRACT_DEPLOYED:
buttonWrite.setVisibility(View.GONE);
buttonRead.setVisibility(View.GONE);
buttonReadOwner.setVisibility(View.GONE);
buttonDeploy.setVisibility(View.VISIBLE);
buttonReadReceipt.setVisibility(View.GONE);
valueTextview.setVisibility(View.GONE);
break;
case CONTRACT_NOT_MINED_YET:
buttonWrite.setVisibility(View.GONE);
buttonRead.setVisibility(View.GONE);
buttonReadOwner.setVisibility(View.GONE);
buttonDeploy.setVisibility(View.GONE);
buttonReadReceipt.setVisibility(View.VISIBLE);
valueTextview.setVisibility(View.GONE);
break;
case CONTRACT_DEPLOYED:
buttonWrite.setVisibility(View.VISIBLE);
buttonRead.setVisibility(View.VISIBLE);
buttonReadOwner.setVisibility(View.VISIBLE);
buttonDeploy.setVisibility(View.GONE);
buttonReadReceipt.setVisibility(View.GONE);
valueTextview.setVisibility(View.VISIBLE);
break;
}
}
private void readOwner() {
SharedPreferences prefs = getSharedPreferences(SIMPLE_STORAGE_PREFS, MODE_PRIVATE);
String contractAddress = prefs.getString(CONTRACT_ADDRESS, null);
final SimpleOwnedStorage simpleOwnedStorage = ethereumAndroid.contracts().bind(contractAddress, CONTRACT_ABI, SimpleOwnedStorage.class);
Runnable readTask = new Runnable() {
@Override
public void run() {
String currentOwner;
try {
currentOwner = simpleOwnedStorage.currentOwner();
} catch(Exception e) {
showError(e);
return;
}
final byte[] owner = Base64.decode(currentOwner,Base64.DEFAULT);
Runnable showResult = new Runnable() {
@Override
public void run() {
Toast.makeText(SimpleStorageActivity.this, "owner: " + Utils.toHexString(new BigInteger(owner)), Toast.LENGTH_LONG).show();
}
};
SimpleStorageActivity.this.runOnUiThread(showResult);
}
};
new Thread(readTask, "read owner thread").start();
}
private void showError(final Exception e) {
final String message;
if (e instanceof ResponseNotOKException) {
message = ((ResponseNotOKException) e).getErrorMessage();
} else {
message = e.getMessage();
}
Runnable showResult = new Runnable() {
@Override
public void run() {
Toast.makeText(SimpleStorageActivity.this, "an error occurred: " + message, Toast.LENGTH_LONG).show();
if(!ethereumAndroid.hasServiceConnection()) {
initialize();
}
}
};
SimpleStorageActivity.this.runOnUiThread(showResult);
}
private void readValue() {
SharedPreferences prefs = getSharedPreferences(SIMPLE_STORAGE_PREFS, MODE_PRIVATE);
String contractAddress = prefs.getString(CONTRACT_ADDRESS, null);
final SimpleOwnedStorage simpleOwnedStorage = ethereumAndroid.contracts().bind(contractAddress, CONTRACT_ABI, SimpleOwnedStorage.class);
Runnable readTask = new Runnable() {
@Override
public void run() {
final String value;
try {
value = simpleOwnedStorage.get();
} catch (Exception e) {
showError(e);
return;
}
Runnable showResult = new Runnable() {
@Override
public void run() {
Toast.makeText(SimpleStorageActivity.this, "stored value: " + value, Toast.LENGTH_LONG).show();
}
};
SimpleStorageActivity.this.runOnUiThread(showResult);
}
};
new Thread(readTask, "read contract data thread").start();
}
private void writeValue() {
AutoCompleteTextView valueTextview = (AutoCompleteTextView) findViewById(R.id.storage_input);
final String value = valueTextview.getText().toString();
if (TextUtils.isEmpty(value)) {
valueTextview.setError(getString(R.string.error_field_required));
} else {
SharedPreferences prefs = getSharedPreferences(SIMPLE_STORAGE_PREFS, MODE_PRIVATE);
final String contractAddress = prefs.getString(CONTRACT_ADDRESS, null);
final SimpleOwnedStorage simpleOwnedStorage = ethereumAndroid.contracts().bind(contractAddress, CONTRACT_ABI, SimpleOwnedStorage.class);
Runnable writeTask = new Runnable() {
@Override
public void run() {
final PendingTransaction<Void> pendingWrite;
try {
pendingWrite = simpleOwnedStorage.set(value);
} catch (Exception e) {
showError(e);
return;
}
Runnable transactionTask = new Runnable() {
@Override
public void run() {
ethereumAndroid.submitTransaction(SimpleStorageActivity.this, REQUEST_CODE_WRITE, pendingWrite.getUnsignedTransaction());
}
};
SimpleStorageActivity.this.runOnUiThread(transactionTask);
}
};
new Thread(writeTask, "write contract data thread").start();
}
}
private void readContractAddress() {
final SharedPreferences prefs = getSharedPreferences(SIMPLE_STORAGE_PREFS, MODE_PRIVATE);
final String transaction = prefs.getString(TRANSACTION, null);
Runnable readTask = new Runnable() {
@Override
public void run() {
WrappedRequest wrappedRequest = new WrappedRequest();
wrappedRequest.setCommand(RpcCommand.eth_getTransactionReceipt.toString());
wrappedRequest.setParameters(new Object[]{transaction});
final WrappedResponse response = ethereumAndroid.send(wrappedRequest);
if (response.isSuccess()) {
HashMap<String, String> transactionObject = (HashMap<String, String>) response.getResponse();
final String contractAddress = transactionObject.get(CONTRACT_ADDRESS);
if (contractAddress != null) {
prefs.edit().putString(CONTRACT_ADDRESS, contractAddress).commit();
Runnable updateStateTask = new Runnable() {
@Override
public void run() {
applyState();
}
};
runOnUiThread(updateStateTask);
}
} else {
Runnable showErrorTask = new Runnable() {
@Override
public void run() {
Toast.makeText(SimpleStorageActivity.this, "reading address failed " + response.getErrorMessage(), Toast.LENGTH_LONG).show();
}
};
runOnUiThread(showErrorTask);
}
}
};
new Thread(readTask, "read contract address thread").start();
}
private void deployContract() {
Runnable deployContractTask = new Runnable() {
@Override
public void run() {
final String transaction = ethereumAndroid.contracts().create(CONTRACT_BYTECODCE, CONTRACT_ABI, "initial value");
Runnable submitTransactionTask = new Runnable() {
@Override
public void run() {
ethereumAndroid.submitTransaction(SimpleStorageActivity.this, REQUEST_CODE_DEPLOY, transaction);
}
};
runOnUiThread(submitTransactionTask);
}
};
new Thread(deployContractTask, "create contract thread").start();
}
}
