aptos 0.0.2 aptos: ^0.0.2 copied to clipboard
Aptos Dart SDK.
import 'dart:convert';
import 'dart:math';
import 'dart:typed_data';
import 'package:aptos/aptos.dart';
import 'package:aptos/coin_client.dart';
import 'package:aptos/constants.dart';
import 'package:aptos/models/payload.dart';
import 'package:aptos/models/signature.dart';
import 'package:aptos/models/transaction.dart';
import 'package:flutter/material.dart';
import 'package:ed25519_edwards/ed25519_edwards.dart' as ed25519;
void main() {
runApp(const MyApp());
}
class MyApp extends StatelessWidget {
const MyApp({Key? key}) : super(key: key);
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Aptos',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: const MyHomePage(title: 'Transfer Aptos'),
);
}
}
class MyHomePage extends StatefulWidget {
const MyHomePage({Key? key, required this.title}) : super(key: key);
final String title;
@override
State<MyHomePage> createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
final privateKeyTextEditingController = TextEditingController();
final addressTextEditingController = TextEditingController();
final amountTextEditingController = TextEditingController();
var message = "";
Future<dynamic> _transferWithEncodeSubmissionAPI(
String privateKey,
String receiverAddress,
BigInt amount,
BigInt gasPrice,
BigInt maxGasAmount,
BigInt expirationTimestamp) async {
final aptos = AptosClient(Constants.testnetAPI, enableDebugLog: true);
final account = AptosAccount(Uint8List.fromList(HEX.decode(privateKey)));
final sender = account.address;
final accountInfo = await aptos.getAccount(sender);
final txSubmission = TransactionEncodeSubmissionRequest(
sender: sender,
sequenceNumber: accountInfo.sequenceNumber,
maxGasAmount: maxGasAmount.toString(),
gasUnitPrice: gasPrice.toString(),
expirationTimestampSecs: expirationTimestamp.toString(),
payload: Payload(
"entry_function_payload",
"0x1::coin::transfer",
["0x1::aptos_coin::AptosCoin"],
[receiverAddress, amount.toString()]
)
);
final encodeTx = await aptos.encodeSubmission(txSubmission);
final hex = HEX.decode(encodeTx.substring(2));
final hexBytes = Uint8List.fromList(hex);
final privateKeyBytes = HexString(privateKey).toUint8Array();
final signingKey = ed25519.PrivateKey(privateKeyBytes);
final signEncode = ed25519.sign(signingKey, hexBytes).sublist(0, 64);
final tx = TransactionRequest(
sender: txSubmission.sender,
sequenceNumber: txSubmission.sequenceNumber,
maxGasAmount: txSubmission.maxGasAmount.toString(),
gasUnitPrice: txSubmission.gasUnitPrice.toString(),
expirationTimestampSecs: txSubmission.expirationTimestampSecs.toString(),
payload: txSubmission.payload,
signature: Signature("ed25519_signature", account.pubKey().hex(), "0x"+HEX.encode(signEncode)));
final result = await aptos.submitTransaction(tx);
debugPrint(result.toString());
return result;
}
Future<dynamic> _transfer(String privateKey,
String receiverAddress,
BigInt amount,
BigInt gasPrice,
BigInt maxGasAmount,
BigInt expirationTimestamp) async {
final aptos = AptosClient(Constants.testnetAPI, enableDebugLog: true);
final account = AptosAccount(Uint8List.fromList(HEX.decode(privateKey)));
final sender = account.address;
final accountInfo = await aptos.getAccount(sender);
final ledgerInfo = await aptos.getLedgerInfo();
final sequenceNumber = int.parse(accountInfo.sequenceNumber);
const typeArgs = "0x1::aptos_coin::AptosCoin";
const moduleId = "0x1::coin";
const moduleFunc = "transfer";
final entryFunc = EntryFunction.natural(
moduleId,
moduleFunc,
[TypeTagStruct(StructTag.fromString(typeArgs))],
[bcsToBytes(AccountAddress.fromHex(receiverAddress)), bcsSerializeUint64(amount)],
);
final entryFunctionPayload = TransactionPayloadEntryFunction(entryFunc);
final rawTx = RawTransaction(
AccountAddress.fromHex(sender),
BigInt.from(sequenceNumber),
entryFunctionPayload,
maxGasAmount,
gasPrice,
expirationTimestamp,
ChainId(ledgerInfo["chain_id"]));
final privateKeyBytes = HexString(privateKey).toUint8Array();
final signingKey = ed25519.newKeyFromSeed(privateKeyBytes.sublist(0, 32));
final publicKey = ed25519.public(signingKey);
final txnBuilder = TransactionBuilderEd25519(
Uint8List.fromList(publicKey.bytes),
(signingMessage) => Ed25519Signature(ed25519.sign(signingKey, signingMessage).sublist(0, 64)),
);
final signedTx = txnBuilder.rawToSigned(rawTx);
final txEdd25519 = signedTx.authenticator as TransactionAuthenticatorEd25519;
final signature = txEdd25519.signature.value;
final tx = TransactionRequest(
sender: sender,
sequenceNumber: sequenceNumber.toString(),
maxGasAmount: maxGasAmount.toString(),
gasUnitPrice: gasPrice.toString(),
expirationTimestampSecs: expirationTimestamp.toString(),
payload: Payload(
"entry_function_payload",
"$moduleId::$moduleFunc",
["0x1::aptos_coin::AptosCoin"],
[receiverAddress, amount.toString()]),
signature: Signature("ed25519_signature", account.pubKey().hex(), "0x"+HEX.encode(signature)));
final result = await aptos.submitTransaction(tx);
debugPrint(result.toString());
return result;
}
Future<dynamic> _transferAptos(
AptosAccount account,
String receiverAddress,
BigInt amount,
{BigInt? gasPrice,
BigInt? maxGasAmount,
BigInt? expirationTimestamp}) async {
final aptos = AptosClient(Constants.testnetAPI, enableDebugLog: true);
final coinClient = CoinClient(aptos);
final txHash = await coinClient.transfer(
account,
receiverAddress,
amount,
maxGasAmount: maxGasAmount,
gasUnitPrice: gasPrice,
expireTimestamp: expirationTimestamp
);
debugPrint(txHash);
return txHash;
}
void _send() async {
final privateKey = privateKeyTextEditingController.text.trim();
final address = addressTextEditingController.text.trim();
final amountText = amountTextEditingController.text.trim();
AptosAccount account;
try {
account = AptosAccount(HexString(privateKey).toUint8Array());
} catch (e) {
setState(() {
message = "invalid private key length";
});
return;
}
final amount = double.tryParse(amountText);
if (amount == null) {
setState(() {
message = "invalid aptos amount";
});
return;
}
final totalAptos = BigInt.from(amount * pow(10, 8));
final result = await _transferAptos(account, address, totalAptos);
setState(() {
message = "txhash: ${result["hash"]}";
});
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Container(
padding: const EdgeInsets.symmetric(horizontal: 20),
child: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
TextField(
controller: privateKeyTextEditingController,
decoration: const InputDecoration(
border: OutlineInputBorder(),
labelText: "Private key"
)
),
const SizedBox(height: 40),
TextField(
controller: addressTextEditingController,
decoration: const InputDecoration(
border: OutlineInputBorder(),
labelText: "Receiver address"
)
),
const SizedBox(height: 20),
TextField(
controller: amountTextEditingController,
decoration: const InputDecoration(
border: OutlineInputBorder(),
labelText: "Aptos amount"
)
),
const SizedBox(height: 20),
TextButton(
onPressed: _send,
child: const Text("Send", style: TextStyle(fontSize: 30))
),
const SizedBox(height: 20),
Text(message, style: const TextStyle(color: Colors.red))
],
),
),
)
);
}
}