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Add initial flow for transactions subscription

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This commit is contained in:
OmarHatem 2023-06-06 22:32:36 +03:00
parent cd206d730a
commit 73743932ae
3 changed files with 61 additions and 5 deletions
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48
cw_ethereum/lib/ethereum_client.dart
View file

@ -1,3 +1,4 @@
import 'dart:async';
import 'dart:math';
import 'package:cw_core/crypto_currency.dart';
@ -20,6 +21,7 @@ class EthereumClient {
Map<CryptoCurrency, String> get erc20Currencies => _erc20Currencies;
Web3Client? _client;
StreamSubscription<Transfer>? subscription;
bool connect(Node node) {
try {
@ -31,6 +33,47 @@ class EthereumClient {
}
}
void setListeners(EthereumAddress userAddress, Function(FilterEvent) onNewTransaction) async {
// final String abi = await rootBundle.loadString("assets/abi_json/erc20_abi.json");
// final contractAbi = ContractAbi.fromJson(abi, "ERC20");
//
// final contract = DeployedContract(
// contractAbi,
// EthereumAddress.fromHex("0xf451659CF5688e31a31fC3316efbcC2339A490Fb"),
// );
//
// final transferEvent = contract.event('Transfer');
// // listen for the Transfer event when it's emitted by the contract above
// final subscription = _client!
// .events(FilterOptions.events(contract: contract, event: transferEvent))
// .take(1)
// .listen((event) {
// final decoded = transferEvent.decodeResults(event.topics ?? [], event.data ?? '');
//
// final from = decoded[0] as EthereumAddress;
// final to = decoded[1] as EthereumAddress;
// final value = decoded[2] as BigInt;
//
// print('$from sent $value MetaCoins to $to');
// });
// final eventFilter = FilterOptions(address: userAddress);
//
// _client!.events(eventFilter).listen((event) {
// print("!!!!!!!!!!!!!!!!!!");
// print('Address ${event.address} data ${event.data} tx hash ${event.transactionHash}!');
// onNewTransaction(event);
// });
// final erc20 = Erc20(client: _client!, address: userAddress);
//
// subscription = erc20.transferEvents().take(1).listen((event) {
// print("!!!!!!!!!!!!!!!!!!");
// print('${event.from} sent ${event.value} MetaCoins to ${event.to}!');
// onNewTransaction(event);
// });
}
Future<EtherAmount> getBalance(EthereumAddress address) async =>
await _client!.getBalance(address);
@ -186,6 +229,11 @@ I/flutter ( 4474): Gas Used: 53000
return erc20Balances;
}
void stop() {
subscription?.cancel();
_client?.dispose();
}
// Future<bool> sendERC20Token(
// EthereumAddress to, CryptoCurrency erc20Currency, BigInt amount) async {
// if (_erc20Currencies[erc20Currency] == null) {

4
cw_ethereum/lib/ethereum_transaction_history.dart
View file

@ -15,7 +15,9 @@ abstract class EthereumTransactionHistoryBase
}
@override
Future<void> save() async {}
Future<void> save() async {
// TODO: implement
}
@override
void addOne(EthereumTransactionInfo transaction) =>

14
cw_ethereum/lib/ethereum_wallet.dart
View file

@ -96,7 +96,9 @@ abstract class EthereumWalletBase
}
@override
void close() {}
void close() {
_client.stop();
}
@action
@override
@ -110,6 +112,7 @@ abstract class EthereumWalletBase
throw Exception("Ethereum Node connection failed");
}
_client.setListeners(_privateKey.address, _onNewTransaction);
_updateBalance();
syncStatus = ConnectedSyncStatus();
@ -199,9 +202,7 @@ abstract class EthereumWalletBase
(timer) async => _priorityFees = await _client.getEstimatedGasForPriorities());
syncStatus = SyncedSyncStatus();
} catch (e, stacktrace) {
print(stacktrace);
print(e.toString());
} catch (e) {
syncStatus = FailedSyncStatus();
}
}
@ -270,4 +271,9 @@ abstract class EthereumWalletBase
Future<void>? updateBalance() => null;
List<CryptoCurrency> get erc20Currencies => _client.erc20Currencies.keys.toList();
void _onNewTransaction(FilterEvent event) {
_updateBalance();
// TODO: Add in transaction history
}
}